Variable Decoder Patents (Class 381/22)
  • Publication number: 20140369503
    Abstract: A combined signal (Z) is provided as an additive mix of a secondary audio signal (Y) and a phase-inverted reduced primary signal (Xm?) obtained from a primary audio signal. The secondary signal (Y) can be restored from the primary (X) and the combined (Z) signal by additively mixing the latter with a reduced primary signal (Xm) obtained from the primary signal. This coding approach allows a supplementary audio service, in particular an audio description/video description to be distributed alongside with a multi-channel audio signal at low extra bandwidth or storage cost.
    Type: Application
    Filed: January 8, 2013
    Publication date: December 18, 2014
    Applicant: DOLBY LABORATORIES LICENSING CORPORATION
    Inventor: Will Kerr
  • Publication number: 20140362998
    Abstract: A directional coding conversion method and system includes receiving input audio signals that comprise directional audio coded signals into which directional audio information is encoded according to a first loudspeaker setup and extracting the directional audio coded signals from the received input audio signals. The method and system further includes decoding, according to the first loudspeaker setup, the extracted directional audio coded signals to provide at least one absolute audio signal and corresponding absolute directional information and processing the at least one absolute audio signal and the absolute directional information to provide first output audio signals coded according to a second loudspeaker setup.
    Type: Application
    Filed: June 4, 2014
    Publication date: December 11, 2014
    Applicant: Harman Becker Automotive Systems GmbH
    Inventors: Markus CHRISTOPH, Florian WOLF
  • Patent number: 8908873
    Abstract: An input multi-channel representation is converted into a different output multi-channel representation of a spatial audio signal, in that an intermediate representation of the spatial audio signal is derived, the intermediate representation having direction parameters indicating a direction of origin of a portion of the spatial audio signal; and in that the output multi-channel representation of the spatial audio signal is generated using the intermediate representation of the spatial audio signal.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: December 9, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Juergen Herre, Ville Pulkki
  • Publication number: 20140355767
    Abstract: A method and apparatus for performing an adaptive down-mixing of a multichannel audio signal comprising a number of input channels, wherein a signal adaptive transformation of said input channels is performed by multiplying the input channels with a downmix block matrix comprising a fixed block for providing a set of backward compatible primary channels and a signal adaptive block for providing a set of secondary channels
    Type: Application
    Filed: August 14, 2014
    Publication date: December 4, 2014
    Inventors: David VIRETTE, Janusz KLEJSA, Willem Bastiaan KLEIJN
  • Patent number: 8903098
    Abstract: The present invention relates to a signal processing apparatus and method, a program, and a data recording medium configured such that the playback level of an audio signal can be easily and effectively enhanced without requiring prior analysis. An analyzer 21 generates mapping control information in the form of the root mean square of samples in a given segment of a supplied audio signal. A mapping processor 22 takes a nonlinear function determined by the mapping control information taken as a mapping function, and conducts amplitude conversion on a supplied audio signal using the mapping function. In this way, by conducting amplitude conversion of an audio signal using a nonlinear function that changes according to the characteristics in respective segments of an audio signal, the playback level of an audio signal can be easily and effectively enhanced without requiring prior analysis. The present invention may be applied to portable playback apparatus.
    Type: Grant
    Filed: September 6, 2011
    Date of Patent: December 2, 2014
    Assignee: Sony Corporation
    Inventors: Minoru Tsuji, Toru Chinen
  • Patent number: 8891775
    Abstract: The invention discloses a method and an encoder for processing a digital audio stereo signal. A digital audio encoder for coding such audio signal comprises a predictive Temporal Noise Shaping (TNS) filter, a Mid-/Side (M/S) coding unit, a control unit for determining a first prediction gain related to the unmodified L/R signal processed by the TNS filter and for determining a second prediction gain related to the M/S-coded L/R signal processed by the TNS filter, wherein the control unit is adapted to disable TNS-filtering—i.e. to bypass the TNS filter—for a current signal frame, if the first and second prediction gains differ by more than a pre-determined mismatch range.
    Type: Grant
    Filed: May 7, 2012
    Date of Patent: November 18, 2014
    Assignee: Dolby International AB
    Inventors: Michael Schug, Harald H. Mundt
  • Patent number: 8891776
    Abstract: The processing efficiency of a process used to decode frames of an enhanced AC-3 bit stream is improved by processing each audio block in a frame only once. Audio blocks of encoded data are decoded in block order rather than in channel order. Exemplary decoding processes for enhanced bit stream coding features such as adaptive hybrid transform processing and spectral extension are disclosed.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 18, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Kamalanathan Ramamoorthy
  • Patent number: 8886548
    Abstract: Provided is an encoding device (1) including: a pitch contour analysis unit (101) which detects information, a dynamic time-warping unit (102) which generates, based on the information, pitch change ratios (Tw_ratio in FIG. 18) within a range (86) including a range (86a) of the pitch change ratios corresponding to absolute pitch differences of 42 cents or larger; a first lossless coding unit (103) which codes the generated pitch parameters (102x); a time-warping unit (104) which shifts a pitch of a signal according to the information; and a second encoding unit which codes a signal (104x) obtained by the shifting.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: November 11, 2014
    Assignee: Panasonic Corporation
    Inventors: Tomokazu Ishikawa, Takeshi Norimatsu, Kok Seng Chong, Huan Zhou, Haishan Zhong
  • Patent number: 8885836
    Abstract: An improved decorrelator is disclosed that processes an input audio signal in two separate paths. In one path, a banded phase-flip filter is applied to lower frequencies of the input audio signal. In a second path, a frequency-dependent delay is applied to higher frequencies of the input audio signal. Signals from the two paths are combined to obtain an output signal that is psychoacoustically decorrelated with the input audio signal. The decorrelated signal can be mixed with the input audio signal without generating audible artifacts.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: November 11, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: David S. McGrath, Mark S. Vinton
  • Patent number: 8880413
    Abstract: The invention is aimed at improving the quality of the filtering by transfer functions of HRTF type of signals (L, R) compressed in a transformed domain, for binaural playing on two channels (L-BIN, R-BIN), using a combination of HRTF filters (hL,L, hL,R) including a decorrelated version (HRTF-C*, HRTF-E*) of a few of these filters. For this purpose, a decorrelation cue is given with spatialization parameters (SPAT) accompanying the compressed signals (L, R). The Decorrelation comprises applying a different phase shift to each subband of the input signal combined with addition of an overall delay. The invention makes it possible to improve the broadening in the binaural rendition of audio scenes initially in a multi-channel format.
    Type: Grant
    Filed: June 19, 2007
    Date of Patent: November 4, 2014
    Assignee: Orange
    Inventors: David Virette, Alexandre Guerin
  • Patent number: 8879742
    Abstract: An apparatus for determining a spatial output multi-channel audio signal based on an input audio signal and an input parameter. The apparatus includes a decomposer for decomposing the input audio signal based on the input parameter to obtain a first decomposed signal and a second decomposed signal different from each other. Furthermore, the apparatus includes a renderer for rendering the first decomposed signal to obtain a first rendered signal having a first semantic property and for rendering the second decomposed signal to obtain a second rendered signal having a second semantic property being different from the first semantic property. The apparatus comprises a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: November 4, 2014
    Assignee: Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Sascha Disch, Ville Pulkki, Mikko-Ville Laitinen, Cumhur Erkut
  • Patent number: 8873764
    Abstract: An acoustic echo suppression unit according to an embodiment of the present invention includes and input interface for extracting a downmix signal from an input signal, the input signal including the downmix signal and parametric side information, wherein the downmix and the parametric side information together represent a multichannel signal, a calculator for calculating filter coefficients for an adaptive filter, wherein the calculator is adapted to determine the filter coefficients based on the downmix signal and a microphone signal or a signal derived from the microphone signal, and an adaptive filter adapted to filter the microphone signal or the signal derived from the microphone signal based on the filter coefficients to suppress an echo caused by the multichannel signal in the microphone signal.
    Type: Grant
    Filed: October 13, 2011
    Date of Patent: October 28, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Fabian Kuech, Markus Kallinger, Markus Schmidt, Meray Zourub, Marco Diatschuk, Oliver Moser
  • Patent number: 8867751
    Abstract: A method, medium, and system encoding and/or decoding a multi-channel audio signal, and a method, medium, and system decoding a signal down-mixed from multi-channels to a 2-channel signal. The method of encoding an audio signal may include generating spatial cues indicating directivity information of a virtual sound source generated by at least two channel sound sources among a plurality of channels, and down-mixing the plurality of channel signals. The method of decoding an audio signal may include receiving inputs of spatial cues indicating directivity information of a virtual sound source generated by at least two channel sound sources among sound sources of a plurality of channels, and a signal down-mixed from the plurality of channel signals, and restoring the down-mixed signal to a plurality of channel signals by using the spatial cues. According to such systems, media, and methods, a multi-channel audio signal can be accurately encoded and/or decoded regardless of frequency bands.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: October 21, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Youngtae Kim
  • Patent number: 8867753
    Abstract: An apparatus for upmixing a downmix audio signal describing one or more downmix audio channels into an upmixed audio signal describing a plurality of upmixed audio channels includes an upmixer configured to apply temporally variable upmixing parameters to upmix the downmix audio signal in order to obtain the upmixed audio signal. The apparatus also includes a parameter interpolator, wherein the parameter interpolator is configured to obtain one or more temporally interpolated upmix parameters to be used by the upmixer on the basis of a first complex-valued upmix parameter and a subsequent second complex-valued upmix parameter.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: October 21, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V..
    Inventors: Matthias Neusinger, Julien Robilliard, Johannes Hilpert
  • Patent number: 8867752
    Abstract: A method for processing sound data is provided for the reconstruction of multi-channel audio data on the basis at least of data on a reduced number of channels and of spatialization data. A test is carried out to determine whether the spatialization data received are valid. If the test is positive, a spatialization value is predicted according to a per respective model of a plurality of models. A prediction model is chosen on the basis of the spatialization values thus predicted and on the basis of the spatialization data received, to permit, in case of subsequent reception of defective spatialization data, a prediction according to this chosen model of a spatialization value and to use this predicted spatialization value for the reconstruction of the multi-channel audio data.
    Type: Grant
    Filed: July 3, 2009
    Date of Patent: October 21, 2014
    Assignee: Orange
    Inventors: David Virette, Pierrick Philippe
  • Patent number: 8855321
    Abstract: An audio signal processing method and a broadcasting output apparatus using the audio signal processing method are provided. The audio signal processing method includes selecting an audio signal to be processed from among a plurality of audio signals in which the same audio data is compressed in different formats, when the plurality of audio signals are received; and processing the selected audio signal. Therefore, it is possible to select a high quality audio signal from among audio signals compressed in various audio formats and to provide a user with the high quality sound.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: October 7, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jong-pill Park
  • Patent number: 8855319
    Abstract: An audio signal processing apparatus and an audio signal processing method are provide. The audio signal processing apparatus comprises: a plurality of individual audio interfaces, an audio signal processing unit, and an audio channel splitting unit. The audio signal processing unit is utilized for determining a total number of audio channels corresponding to the individual audio interfaces and generating a first output audio signal with a first number of audio channels according to an input audio signal and the total number of audio channels when the audio signal processing apparatus is operated under a first operational mode. The audio channel splitting unit is coupled to the audio signal processing unit and the audio interfaces. When the audio signal processing apparatus is operated under the first operational mode, the audio channel splitting unit splits the first output audio signal with the first number of audio channels to the audio interfaces, respectively.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: October 7, 2014
    Assignee: Mediatek Inc.
    Inventors: Wei-Han Liu, Hsiao-Yu Han
  • Patent number: 8855320
    Abstract: An apparatus for determining a spatial output multi-channel audio signal based on an input audio signal and an input parameter. The apparatus includes a decomposer for decomposing the input audio signal based on the input parameter to obtain a first decomposed signal and a second decomposed signal different from each other. Furthermore, the apparatus includes a renderer for rendering the first decomposed signal to obtain a first rendered signal having a first semantic property and for rendering the second decomposed signal to obtain a second rendered signal having a second semantic property being different from the first semantic property. The apparatus comprises a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: October 7, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Sascha Disch, Ville Pulkki, Mikko-Ville Laitinen, Cumhur Erkut
  • Publication number: 20140294181
    Abstract: An orthogonal transform apparatus computes either one of the real and imaginary components of the quadrature mirror filter coefficient contained in a first subinterval of a plurality of subintervals among which a coefficient sequence containing a plurality of quadrature mirror filter coefficients is divided so that the values of basis functions are symmetrically placed, by computing a sum of products of the plurality of modified discrete cosine transform coefficients and the basis functions corresponding to the subinterval, computes the other one of the real and imaginary components of the quadrature mirror filter coefficient contained in the first subinterval and the real and imaginary components of the quadrature mirror filter coefficient contained in another subintervals by performing a butterfly operation using a computed value produced as a result of the sum of products and computes each quadrature mirror filter coefficient by combining the real component and imaginary component thereof.
    Type: Application
    Filed: February 25, 2014
    Publication date: October 2, 2014
    Applicant: FUJITSU LIMITED
    Inventors: AKIRA Kamano, Yohei KISHI, Shunsuke TAKEUCHI, Takeshi OTANI
  • Patent number: 8848926
    Abstract: Provided is a method for controlling synchronizing downmix signals and MPEG surround side information signals by controlling a delay according to the kind of downmix audio signals in an MPEG surround decoder. When multi-channel audio signals are restored using an HE-AAC decoder and a low-power MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter. Anther delay unit delays spatial parameters to compensate for a delay caused in QMF and Nyquist banks when time-domain downmix signals are used. Also, when multi-channel audio signals are restored using an HE-AAC decoder and a high-quality MPEG surround decoder and complex QMF signals outputted from the HE-AAC decoder are used as downmix signals, a delay unit compensates for a delay caused in a real-to-complex converter.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: September 30, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jeong-Il Seo, Seung-Kwon Beack, In-Seon Jang, Dae-Young Jang, Jin-Woo Hong, Jin-Woong Kim
  • Patent number: 8843378
    Abstract: A multi-channel synthesizer includes a post processor for determining post processed reconstruction parameters or quantities derived from the reconstruction parameter for an actual time portion of the input signal so that the post processed reconstruction parameter or the post processed quantity is different from the corresponding quantized and inversely quantized reconstruction parameter in that the value of the post processed reconstruction parameter or the derived quantity is not bound by the quantization step size. A multi-channel reconstructor uses the post-processed reconstruction parameter for reconstructing the multi-channel output signal.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: September 23, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Juergen Herre, Sascha Disch, Johannes Hilpert, Christian Ertel, Andreas Hoelzer, Claus-Christian Spenger
  • Patent number: 8824689
    Abstract: An apparatus for determining a spatial output multi-channel audio signal based on an input audio signal and an input parameter. The apparatus includes a decomposer for decomposing the input audio signal based on the input parameter to obtain a first decomposed signal and a second decomposed signal different from each other. Furthermore, the apparatus includes a renderer for rendering the first decomposed signal to obtain a first rendered signal having a first semantic property and for rendering the second decomposed signal to obtain a second rendered signal having a second semantic property being different from the first semantic property. The apparatus comprises a processor for processing the first rendered signal and the second rendered signal to obtain the spatial output multi-channel audio signal.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: September 2, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Sascha Disch, Ville Pulkki, Mikko-Ville Laitinen, Cumhur Erkut
  • Patent number: 8824690
    Abstract: An apparatus for and a method of processing a multi-channel audio signal using space information. The apparatus includes: a main coding unit down mixing a multi-channel audio signal by applying space information to surround components included in the multi-channel audio signal, generating side information using the multi-channel audio signal or a stereo signal of a down-mixed result, coding the stereo signal and the side information, and transmitting the coded result as a coding signal; and a main decoding unit receiving the coding signal, decoding the stereo signal and the side information using the received coding signal, up mixing the decoded stereo signal using the decoded side information, and restoring the multi-channel audio signal.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: September 2, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Junghoe Kim, Sangchul Ko, Shihwa Lee, Eunmi Oh, Miao Lei
  • Patent number: 8817991
    Abstract: A method is provided for coding a multi-channel audio signal representing a sound scene comprising a plurality of sound sources. The method comprises decomposing the multi-channel signal into frequency bands and the following performed per frequency band: obtaining data representative of the direction of the sound sources of the sound scene, selecting a set of sound sources constituting principal sources, adapting the data representative of the direction of the selected principal sources, as a function of restitution characteristics of the multi-channel signal, determining a matrix for mixing the principal sources as a function of the adapted data, matrixing the principal sources by the matrix determined so as to obtain a sum signal with a reduced number of channels and coding the data representative of the direction of the sound sources and forming a binary stream comprising the coded data, the binary stream being transmittable in parallel with the sum signal.
    Type: Grant
    Filed: December 11, 2009
    Date of Patent: August 26, 2014
    Assignee: Orange
    Inventors: Florent Jaillet, David Virette
  • Patent number: 8818539
    Abstract: An audio encoding device includes, a time-frequency transform unit that transforms signals of channels included in an audio signal having a first number of channels into frequency signals respectively, a down-mix unit that generates an audio frequency signal having a second number of channels, a low channel encoding unit that generates a low channel audio code by encoding the audio frequency signal, a space information extraction unit that extracts space information representing spatial information of a sound, an importance calculation unit that calculates importance on the basis of the space information, a space information correction unit that corrects the space information, a space information encoding unit that generates a space information code, and a multiplexing unit that generates an encoded audio signal by multiplexing the low channel audio code and the space information code.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: August 26, 2014
    Assignee: Fujitsu Limited
    Inventors: Masanao Suzuki, Miyuki Shirakawa, Yoshiteru Tsuchinaga
  • Patent number: 8811621
    Abstract: A parametric stereo upmix apparatus generates left and right signals from a mono downmix signal based on spatial parameters. The parametric stereo upmix includes a predictor configured to predict a difference signal including a difference between the left and right signals based on the mono downmix signal scaled with a prediction coefficient. The prediction coefficient is derived from the spatial parameters. The parametric stereo upmix apparatus further includes an arithmetic unit configured to derive the left and right signals based on a sum and a difference of the mono downmix signal and the difference signal.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: August 19, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Erik Gosuinus Petrus Schuijers
  • Patent number: 8804970
    Abstract: An audio encoder has a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder has a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: August 12, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Bernhard Grill, Stefan Bayer, Guillaume Fuchs, Stefan Geyersberger, Ralf Geiger, Johannes Hilpert, Ulrich Kraemer, Jeremie Lecomte, Markus Multrus, Max Neuendorf, Harald Popp, Nikolaus Rettelbach, Frederik Nagel, Sascha Disch, Juergen Herre, Yoshikazu Yokotani, Stefan Wabnik, Gerald Schuller, Jens Hirschfeld
  • Patent number: 8804967
    Abstract: Methods and apparatuses for encoding and decoding a multi-channel audio signal are provided. In the encoding method, spatial information is calculated based on a multi-channel audio signal and a down-mix signal, and a compensation parameter that compensates for the down-mix signal is calculated based on the multi-channel audio signal and the down-mix signal. Thereafter, a bitstream is generated by encoding the spatial information, the compensation parameter, and the down-mix signal and combining the results of the encoding. Therefore, it is possible to prevent deterioration of the quality of sound regarding a multi-channel audio signal by compensating for the multi-channel audio signal using a compensation parameter that compensates for a down-mix signal.
    Type: Grant
    Filed: July 2, 2010
    Date of Patent: August 12, 2014
    Assignee: LG Electronics Inc.
    Inventors: Yang-Won Jung, Hee Suk Pang, Hyen-O Oh, Dong Soo Kim, Jae Hyun Lim
  • Patent number: 8804971
    Abstract: A method for encoding a multichannel audio input signal, including steps of generating a downmix of low frequency components of a subset of channels of the input signal, waveform coding each channel of the downmix, thereby generating waveform coded, downmixed data, performing parametric encoding on at least some higher frequency components of each channel of the input signal, thereby generating parametrically coded data, and generating an encoded audio signal (e.g., an E-AC-3 encoded signal) indicative of the waveform coded, downmixed data and the parametrically coded data. Other aspects are methods for decoding such an encoded signal, and systems configured to perform any embodiment of the inventive method.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: August 12, 2014
    Assignees: Dolby International AB, Dolby Laboratories Licensing Corporation
    Inventors: Phillip A. Williams, Michael Schug, Robin Thesing
  • Patent number: 8798275
    Abstract: A method of synthesizing a first (L) and a second (R) output signal from an input signal (x). The method comprises: filtering (201) the input signal to generate a filtered signal (Hx); obtaining a correlation parameter (?) indicative of a desired correlation between the first and second output signals; obtaining a level parameter (c) indicative of a desired level difference between the first and second input signals; and transforming the input signal and the filtered signal by a matrixing operation (203) into the first and second output signals, where the matrixing operation depends on the correlation parameter and the level parameter.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: August 5, 2014
    Assignee: Koninklijke Philips N.V.
    Inventor: Dirk Jeroen Breebaart
  • Patent number: 8798276
    Abstract: A method and apparatus which encode multi-channel audio signals and a method and apparatus which decode multi-channel audio signals. When encoding, a downmixed audio signal, first additional information for restoring multi-channel audio signals from the downmixed audio signal, and second additional information representing characteristics of a residual signal are multiplexed. When decoding, restored multi-channel audio signals having a predetermined phase difference are combined using the second additional information, and an audio signal of each channel is corrected, in order to improve quality of the restored audio signals.
    Type: Grant
    Filed: April 15, 2010
    Date of Patent: August 5, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-gil Moon, Chul-woo Lee
  • Publication number: 20140211948
    Abstract: The present technique relates to a decoding device, a decoding method, an encoding device, an encoding method, and a program which can obtain a high-quality realistic sound. The encoding device stores speaker arrangement information in a comment region in a PCE of an encoded bit stream and stores a synchronous word and identification information in the comment region such that other public comments and the speaker arrangement information stored in the comment region can be distinguished from each other. When an encoded bit stream is decoded, it is determined whether the speaker arrangement information is stored on the basis of the synchronous word and the identification information stored in the comment region. Audio data included in the encoded bit stream is output according to the arrangement of the speakers corresponding to the determination result. The present technique can be applied to an encoding device.
    Type: Application
    Filed: June 24, 2013
    Publication date: July 31, 2014
    Applicant: Sony Corporation
    Inventors: Mitsuyuki Hatanaka, Toru Chinen
  • Publication number: 20140211947
    Abstract: An embodiment of the present invention provides a method for generating a downmixed signal, including: performing a time-frequency transform on a received left sound channel signal and a received right sound channel signal to obtain a frequency domain signal, and dividing the frequency domain signal into several frequency bands; calculating a sound channel energy ratio and a sound channel phase difference of each frequency band; calculating a phase difference between the downmixed signal and a first sound channel signal in each frequency band according to the sound channel energy ratio and the sound channel phase difference; and calculating a frequency domain downmixed signal according to the left sound channel signal, the right sound channel signal, and the phase difference between the downmixed signal and the first sound channel signal in each frequency band. This method effectively improves quality of stereo encoding and decoding.
    Type: Application
    Filed: March 27, 2014
    Publication date: July 31, 2014
    Applicant: Huawei Technologies Co., Ltd.
    Inventors: Wenhai Wu, Lei Miao, Yue Lang, David Virette
  • Publication number: 20140205101
    Abstract: The present technology relates to an encoding device and method, a decoding device and method, and a program that enable audio of a high audio quality to be obtained with a smaller code amount. The encoding device multiplexes low frequency encoding data obtained by encoding a low frequency component of an input signal and high frequency encoding data obtained by encoding data including an estimation coefficient to acquire a high frequency component of the input signal by estimation and outputs multiplexed data. When the input signal is encoded, a calculation unit calculates pseudo high frequency subband power to be an estimation value of power of the high frequency component from an estimation coefficient selected in a frame immediately before a frame of a processing target and the high frequency component of the input signal.
    Type: Application
    Filed: August 14, 2012
    Publication date: July 24, 2014
    Applicant: Sony Corporation
    Inventors: Yuki Yamamoto, Toru Chinen
  • Patent number: 8787585
    Abstract: A perceptually motivated, frequency domain active matrix decoder and decoding method which decodes N audio input signals to generate M audio output signals, where M is greater than N, including by generating M streams of output frequency components which determine the audio output signals, in response to N streams of input frequency components indicative of the audio input signals, determining power ratios from the input frequency components without use of feedback, including at least one power ratio for each critical frequency band in a set of critical frequency bands, and determining gain control values for each of the critical frequency bands from the power ratios including by shaping the power ratios in nonlinear fashion without use of feedback. An active matrix element is steered using the gain control values.
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: July 22, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: C. Phillip Brown
  • Patent number: 8781134
    Abstract: A method of encoding stereo audio that minimizes a number of pieces of side information required for parametric-encoding and parametric-decoding of the stereo audio. The side information may include parameters about interchannel intensity difference (IID), interchannel correlation (IC), overall phase difference (OPD), and interchannel phase difference (IPD), which are required to restore the mono audio to the stereo audio.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: July 15, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Han-gil Moon, Chul-woo Lee
  • Patent number: 8775192
    Abstract: A digital audio interface may include two signal inputs to transmit audio data. A first signal line may carry digital serial audio data. The second signal line may carry a word clock signal to differentiate the serial audio data transmitted over the first signal line. In the case of stereo audio data, the word clock signal may correspond to a left-right clock signal and may differentiate audio data intended for a right channel from that intended for a left channel. The audio data may also be differentiated differently depending on the configuration, such as in the case that the transmitted audio data include audio for more than two channels. The word clock signal may be scaled to regenerate a bit clock signal used to encode the serial audio data over the first signal line. The encoding bit clock signal need not be transmitted.
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: July 8, 2014
    Assignee: Analog Devices, Inc.
    Inventors: Jie Fu, Yang Pan, Yongyi Wu, Khiem Quang Nguyen
  • Patent number: 8767969
    Abstract: A system (200) for processing a sound signal (212) that allows dynamic customization of perceived spatial positions and sound qualities of sound components associated with the sound signal (212). The system provides apparatus for processing a sound signal (212) that includes an input to receive the sound signal (212), a sound unmixer (204) coupled to the input to receive the sound signal (212) and unmix at least one sound stream (216) from the sound signal (212) based on at least one unmixing instruction (214), and an output coupled to the sound unmixer (214) to output the at least one sound stream (216).
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: July 1, 2014
    Assignee: Creative Technology Ltd
    Inventors: Jean Laroche, Tyler Brown, Alan Peevers, Robert Sussman, Mark Dolson
  • Patent number: 8767970
    Abstract: A panner is provided that incorporates a surround sound decoder. The panner takes as input the desired panning effect that a user requests, separates sounds using surround sound decoding, and places the separated sounds in the desired places in an output sound field.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: July 1, 2014
    Assignee: Apple Inc.
    Inventor: Aaron M. Eppolito
  • Patent number: 8768691
    Abstract: A sound encoder for efficiently encoding stereophonic sound. A prediction parameter analyzer determines a delay difference D and an amplitude ratio g of a first-channel sound signal with respect to a second-channel sound signal as channel-to-channel prediction parameters from a first-channel decoded signal and a second-channel sound signal. A prediction parameter quantizer quantizes the prediction parameters, and a signal predictor predicts a second-channel signal using the first decoded signal and the quantization prediction parameters. The prediction parameter quantizer encodes and quantizes the prediction parameters (the delay difference D and the amplitude ratio g) using a relationship (correlation) between the delay difference D and the amplitude ratio g attributed to a spatial characteristic (e.g., distance) from a sound source of the signal to a receiving point.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: July 1, 2014
    Assignee: Panasonic Corporation
    Inventor: Koji Yoshida
  • Publication number: 20140177849
    Abstract: Provided are an encoding apparatus and a decoding apparatus of a multi-channel signal. The encoding apparatus of the multi-channel signal may process a phase parameter associated with phase information between a plurality of channels constituting the multi-channel signal, based on a characteristic of the multi-channel signal. The encoding apparatus may generate an encoded bitstream with respect to the multi-channel signal using the processed phase parameter and a mono signal extracted from the multi-channel signal.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung-Hoe Kim, Eun Mi Oh, MiYoung Kim
  • Publication number: 20140177848
    Abstract: A method for processing an audio signal at an audio decoder, the method including receiving a downmix signal, a residual signal, and object information; extracting a background-object signal and a foreground-object signal from the downmix signal using the residual signal and object information; receiving mix information including gain information for the background-object signal; generating a downmix processing information based on the object information and the mix information; and generating an output signal including a modified background-object signal and a modified foreground-object signal. The modified background-object signal is obtained by modifying a gain of the background-object signal using the mix information. The modified foreground-object signal is obtained by modifying a gain of the foreground-object signal using the downmix processing information.
    Type: Application
    Filed: February 11, 2014
    Publication date: June 26, 2014
    Applicant: LG ELECTRONICS INC.
    Inventors: Hyen O OH, Yang Won JUNG
  • Patent number: 8755530
    Abstract: A method for multi-channel processing in a multi-channel sound system, in which a channel or a channel mixture is first split into individual channels, the individual channels are limited by setting the values of the parameters channel fader, threshold, release, and output level and then encoding the individual channels. At least two channels are compressed and/or limited with a uniform output level value in method step, one channel is provided with a deviating output level value, which is set, depending on the audio material to be processed, and every further channel is compressed and/or limited in such a manner that it has an output level value that is at least one decibel less than the uniform output level value. The individual channels are combined into an encoded (coded) channel by setting a value of at least one of the parameters channel fader, threshold, release, and output level.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: June 17, 2014
    Assignee: Kronoton GmbH
    Inventor: Gunnar Kron
  • Publication number: 20140161261
    Abstract: A method of processing an audio signal, the method including receiving a downmix signal including at least one object signal, and object information extracted when the downmix signal is generated, the at least one object signal including a background object and at least one independent object; receiving mix information including mode selection information, the mix information for controlling the at least object signal; receiving enhanced object information corresponding to a residual signal generated when the at least one object signal is downmixed to the downmix signal; generating downmix processing information by using the object information and the mix information; generating an output signal by applying the downmix processed information to the downmix signal; and extracting the background object and the at least one independent object from the downmix signal, by using the enhanced object information.
    Type: Application
    Filed: February 11, 2014
    Publication date: June 12, 2014
    Applicant: LG Electronics Inc.
    Inventors: Hyen-O OH, Yang Won JUNG
  • Patent number: 8744088
    Abstract: A decoding method, medium, and device decoding an input signal, including compressed multi-channel signals as a mono or stereo signal, into 2-channel binaural signals. A full band channel level of each channel in the multi-channel system is calculated from channel level differences between the channels, and data of each channel included in the input signal is localized in directions corresponding to the channels based on the calculated full band channel levels of the channels. Accordingly, the input signal can be output as the 2-channel binaural signals by using simple operations without having to reconstruct multi-channel signals from the input signal in a quadrature mirror filter (QMF) domain.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: June 3, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sangchul Ko, Youngtae Kim, Sangwook Kim, Jungho Kim
  • Patent number: 8744089
    Abstract: A method of encoding stereo audio that minimizes a number of pieces of side information required for parametric-encoding and parametric-decoding of the stereo audio. The side information may include parameters about interchannel intensity difference (IID), interchannel correlation (IC), overall phase difference (OPD), and interchannel phase difference (IPD), which are required to restore the mono audio to the stereo audio.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: June 3, 2014
    Assignee: Samsung Electronics
    Inventors: Han-gil Moon, Jong-hoon Jeong
  • Patent number: 8737627
    Abstract: A decoding method of audio data is applied to an electronic device. The method includes: calculating difference values of the left and right channel audio signal values; determining time slots, wherein each of the first difference values exceeds a threshold value and a time length of the time slots exceeds a preset time; respectively multiplying the time slots with the left channel audio signal values and the right channel audio signal values to obtains and then making subtraction to obtain DM1˜n; finding a U shaped pattern or an inverse U shaped pattern which meets proportionality from the waveform of DM1˜n; and decoding the written symbol “0” or “1” according to the found U shaped pattern or inverse U shaped pattern.
    Type: Grant
    Filed: June 19, 2011
    Date of Patent: May 27, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Chun-Te Wu
  • Patent number: 8731204
    Abstract: For flexibly signaling a synchronous mode or an asynchronous mode in the multi-channel parameter reconstruction, a parameter configuration cue is inserted in the data stream, which is used by a configurator on the side of a multi-channel decoder to configure a multi-channel reconstructor. If the parameter configuration cue has a first meaning, the configurator will look for further configuration information in its input data, while, when the parameter configuration cue has another meaning, the configurator performs a configuration setting of the multi-channel reconstructor based on information on a coding algorithm with which transmission channel data have been coded, so that it is ensured efficiently on the one hand and flexibly on the other hand that there will always be obtained a correct association between parameter data and decoded transmission channel data.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: May 20, 2014
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung E.V.
    Inventors: Ralph Sperschneider, Juergen Herre, Johannes Hilpert, Christian Ertel, Stefan Geyersberger
  • Publication number: 20140133661
    Abstract: An audio signal processor receives a plurality of encoded multi-channel audio signals. A multi-channel decoder (105) decodes a first encoded multi-channel signal to generate a first decoded multi-channel signal. A generator (109) generates an encoded further audio signal by selecting audio encoding data from at least a second encoded multi-channel audio signal such that a number of channels of the encoded further audio signal comprising audio encoding data from the second encoded multi-channel audio signal is less than a number of channels in the second encoded multi-channel signal. Thus, a channel reduction is performed in the encoded data domain. A further decoder (111) generates a further decoded signal by decoding the further encoded audio signal. A combiner (107) combines the first decoded multi-channel signal and the further decoded signal to generate a multi-channel output signal. An exciting user experience can be provided while maintaining low complexity and resource usage.
    Type: Application
    Filed: June 4, 2012
    Publication date: May 15, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Aki Sakari Harma, Arnoldus Werner Johannes Oomen
  • Patent number: RE44929
    Abstract: A motion picture soundtrack reproduction system has a center front soundtrack channel and a plurality of other soundtrack channels. A volume control adjusts the gain of all the channels. The volume control has a range of settings from a minimum to a maximum, the gain of the center front channel having substantially a first relationship to the volume control settings and the gain of the other channels having substantially a second relationship to the volume control settings, the relationships being such that for a range of volume control settings less than a first setting the gain of the center front channel remains substantially constant while the gain of the other channels decreases as the setting decreases or decreases more gradually than the gain of the other channels as the setting decreases.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: June 3, 2014
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Stephen M. Jacobs