Linear Prediction Patents (Class 704/219)
  • Patent number: 10311885
    Abstract: A method for recovering a lost frame in a received audio signal includes: obtaining an initial high-frequency band signal of a current lost frame in the received audio signal; calculating a ratio R, wherein the ratio R is a ratio of a high frequency excitation energy of a previous frame of the current lost frame to a high frequency excitation energy of the current lost frame; obtaining a global gain of the current lost frame according to the ratio R and a global gain of the previous frame of the current lost frame; and recovering a high-frequency band signal of the current lost frame according to the initial high-frequency band signal of the current lost frame and the global gain of the current lost frame. The method can be used in an audio signal decoding process for low-loss recovery of lost frames of the audio signal.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: June 4, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Bin Wang, Zexin Liu, Lei Miao
  • Patent number: 10304472
    Abstract: A coding technology that efficiently codes an input sound signal irrespective of the characteristics thereof and can obtain a decoded sound signal that sounds less artificial to a listener. A coding method codes an input sound signal frame by frame of a predetermined time segment by a selected coding processing from a plurality of types of coding processing in the frequency domain, the coding method makes it possible for a selection unit to select coding processing which is different from the coding processing of the preceding frame as coding processing of the present frame if at least one of the magnitude of the energy of high frequency components of the input sound signal of the preceding frame and the magnitude of the energy of high frequency components of the input sound signal of the present frame is smaller than or equal to a predetermined threshold value.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: May 28, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Noboru Harada
  • Patent number: 10304431
    Abstract: The present document relates to audio coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), and to digital effect processors, e.g. so-called exciters, where generation of harmonic distortion adds brightness to the processed signal. In particular, a system configured to generate a high frequency component of a signal from a low frequency component of the signal is described. The system may comprise an analysis filter bank (501) configured to provide a set of analysis subband signals from the low frequency component of the signal; wherein the set of analysis subband signals comprises at least two analysis subband signals; wherein the analysis filter bank (501) has a frequency resolution of ?f.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: May 28, 2019
    Assignee: Dolby International AB
    Inventors: Per Ekstrand, Lars Villemoes, Per Hedelin
  • Patent number: 10304478
    Abstract: Embodiments disclosed herein provide a method for detecting an audio signal and an apparatus, where the method includes determining an input audio signal as a to-be-determined audio signal; determining an enhanced segmental signal-to-noise ratio (SSNR) of the audio signal, where the enhanced SSNR is greater than a reference SSNR; and comparing the enhanced SSNR with a voice activity detection (VAD) decision threshold to determine whether the audio signal is an active signal. According to the method and the apparatus provided in the embodiments, an active voice and an inactive voice can be accurately distinguished.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: May 28, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhe Wang
  • Patent number: 10296290
    Abstract: A processor configured to: receive, at a floating-point-input-terminal, an input-block of data comprising a plurality of floating-point numbers each floating-point number comprising a mantissa and an exponent; determine an input-scale-factor based on a previous-input-block-exponent-value associated with a previous-input-block of data; and convert the input-block of data into a fixed-point-block of data in accordance with the input-scale-factor, wherein the fixed-point-block of data comprises a plurality of fixed-point-values that can represent the plurality of floating-point numbers within a particular range.
    Type: Grant
    Filed: December 10, 2015
    Date of Patent: May 21, 2019
    Assignee: NXP B.V.
    Inventor: Francisco Barat Quesada
  • Patent number: 10290308
    Abstract: An audio decoder for providing a decoded audio information on the basis of an encoded audio information. The audio decoder has an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame, wherein the error concealment is configured to modify a time domain excitation signal obtained for one or more audio frames preceding a lost audio frame, in order to obtain the error concealment audio information.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: May 14, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventor: Jérémie Lecomte
  • Patent number: 10283125
    Abstract: An error concealment method and apparatus for an audio signal and a decoding method and apparatus for an audio signal using the error concealment method and apparatus. The error concealment method includes selecting one of an error concealment in a frequency domain and an error concealment in a time domain as an error concealment scheme for a current frame based on a predetermined criteria when an error occurs in the current frame, selecting one of a repetition scheme and an interpolation scheme in the frequency domain as the error concealment scheme for the current frame based on a predetermined criteria when the error concealment in the frequency domain is selected, and concealing the error of the current frame using the selected scheme.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: May 7, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Eun-mi Oh, Ki-hyun Choo, Ho-sang Sung, Chang-yong Son, Jung-hoe Kim, Kang-eun Lee
  • Patent number: 10277713
    Abstract: Information identifying a user as having accessed a first network device from an external network connected device is received at an intermediate network connected device from an edge network device. The intermediate network connected device is arranged between the first network device and a second network device. The intermediate network connected device, the first network device and the second network device are within the network and the external network connected device is outside the network. A request to access the second network device is received at the intermediate network connected device from the first network device. It is determined that the user is a source of the request via the first network device based upon the received information. The request from the first network device is evaluated based upon determining the user is the source of the request.
    Type: Grant
    Filed: July 14, 2015
    Date of Patent: April 30, 2019
    Assignee: Cisco Technology, Inc.
    Inventors: Mark Ka Yau Ng, Max Freilich, Tak Cheung Lam
  • Patent number: 10249308
    Abstract: A weighting function determination method includes obtaining a line spectral frequency (LSF) coefficient or an immitance spectral frequency (ISF) coefficient from a linear predictive coding (LPC) coefficient of an input signal and determining a weighting function by combining a first weighting function based on spectral analysis information and a second weighting function based on position information of the LSF coefficient or the ISF coefficient.
    Type: Grant
    Filed: September 10, 2018
    Date of Patent: April 2, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-sang Sung, Eun-mi Oh
  • Patent number: 10242688
    Abstract: An apparatus for processing an audio signal having associated therewith a pitch lag information and a gain information, includes a domain converter for converting a first domain representation of the audio signal into a second domain representation of the audio signal; and a harmonic post-filter for filtering the second domain representation of the audio signal, wherein the post-filter is based on a transfer function including a numerator and a denominator, wherein the numerator includes a gain value indicated by the gain information, and wherein the denominator includes an integer part of a pitch lag indicated by the pitch lag information and a multi-tap filter depending on a fractional part of the pitch lag.
    Type: Grant
    Filed: January 27, 2017
    Date of Patent: March 26, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Emmanuel Ravelli, Christian Helmrich, Goran Markovic, Matthias Neusinger, Sascha Disch, Manuel Jander, Martin Dietz
  • Patent number: 10229692
    Abstract: A quantizing method is provided that includes quantizing an input signal by selecting one of a first quantization scheme not using an inter-frame prediction and a second quantization scheme using the inter-frame prediction, in consideration of one or more of a prediction mode, a predictive error and a transmission channel state.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: March 12, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-sang Sung, Eun-mi Oh
  • Patent number: 10229702
    Abstract: Information related to voice of a question and information related to voice of a response to the question are received. An analysis section acquires a representative pitch of the question (e.g., a pitch of the end of the question), and a representative pitch of the response (e.g., an average pitch of the response) based on the received information. On the basis of comparison between the representative pitch of the question and the representative pitch of the response, an evaluation section evaluates the voice of the response to the question on the basis of how much a difference between the respective representative pitches of the question and the response is away from a predetermined reference value (e.g., a fifth consonant interval). Further, a conversation interval detection section is provided for detecting a conversation interval, i.e., a time interval from the end of the question to the start of the response.
    Type: Grant
    Filed: May 31, 2017
    Date of Patent: March 12, 2019
    Assignee: Yamaha Corporation
    Inventor: Hiraku Kayama
  • Patent number: 10224029
    Abstract: A method for using voiceprint identification to operate voice recognition and electronic device thereof are provided. The method includes the following steps: receiving a specific voice fragment; cutting the received specific voice fragment into a plurality of specific sub-voice clips; performing a voiceprint identification flow to the specific sub-voice clips, respectively; determining whether each of the specific sub-voice clips is an appropriate sub-voice clip according to a result of the voiceprint identification flow; and capturing the appropriate sub-voice clips and operating a voice recognition thereto.
    Type: Grant
    Filed: April 9, 2014
    Date of Patent: March 5, 2019
    Assignee: VIA TECHNOLOGIES, INC.
    Inventor: Guo-Feng Zhang
  • Patent number: 10224051
    Abstract: A quantizing apparatus is provided that includes a quantization path determiner that determines a path from a first path not using inter-frame prediction and a second path using the inter-frame prediction, as a quantization path of an input signal, based on a criterion before quantization of the input signal; a first quantizer that quantizes the input signal, if the first path is determined as the quantization path of the input signal; and a second quantizer that quantizes the input signal, if the second path is determined as the quantization path of the input signal.
    Type: Grant
    Filed: April 14, 2017
    Date of Patent: March 5, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-sang Sung, Eun-mi Oh
  • Patent number: 10223102
    Abstract: Various embodiments describe a dynamic reconfiguration of a media processing system to optimize a latency performance. In an example, a computer system accesses a current latency performance of the media processing system. The latency is associated with performing a codec process on a current configuration of the media processing system. The current configuration includes virtual machines. The computer system estimates, based on the current latency performance and on historical latency performances associated with the current configuration, a next latency performance of the media processing system. The computer system also identifies, from potential configurations, an updated configuration of the media processing system based on a difference between the next latency performance and a target latency performance and on historical performances associated with the potential configurations. The updated configuration specifies an additional number of virtual machines associated with hosting the codec process.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: March 5, 2019
    Assignee: Adobe Systems Incorporated
    Inventors: Viswanathan Swaminathan, Saayan Mitra, Haoliang Wang
  • Patent number: 10224050
    Abstract: A method and system for compressing an audio signal. The method includes receiving a segment of an audio signal and selectively disabling noise suppression for the received segment. The segment is filtered in a noise-suppression module if noise suppression is not disabled. The method also includes calculating an autocorrelation coefficient and an LSP coefficient, predicting a short-term coefficient and long-term coefficients according to the LSP coefficient and calculating one or more bandwidth-expanded correlation coefficients. Further, the method includes determining the type of packet in which to encode the segment. An encoding rate is selected from among a full rate encode, a half-rate encode, and an eight-rate encode if noise suppression is not disabled. An encoding rate is selected from among a full rate encode and a half-rate encode if noise suppression is disabled. Furthermore, the segment is formed into a packet of the determined type and selected rate.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: March 5, 2019
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Mukund Kanyana Navada
  • Patent number: 10217470
    Abstract: A method of performing BandWidth Extension (BWE) includes a frequency band shifting approach to generate an extended high band signal in time domain and a gain determination approach of controlling the energy of the extended high band. The proposed approach allows shifting any size of low band to any size of high band. The BWE scaling gain is estimated by using available filter bank coefficients with extremely low bit rate or without costing any bit, combining three possible gain factors.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: February 26, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Yang Gao
  • Patent number: 10200727
    Abstract: A computer-implemented method, according to one embodiment, includes: splitting a video stream into a plurality of sub-streams, encoding each of the sub-streams in parallel, and transmitting a packet to a receiver, wherein the packet includes a number of the encoded sub-streams. Each of the sub-streams individually provide a unique version of the video stream having a lower video quality, while merging more than one of the sub-streams provides a merged version of the video stream having a relatively higher video quality. Moreover, the number of the encoded sub-streams included in the packet transmitted to the receiver corresponds to a quality of service associated with the receiver. Other systems, methods, and computer program products are described in additional embodiments.
    Type: Grant
    Filed: March 29, 2017
    Date of Patent: February 5, 2019
    Assignee: International Business Machines Corporation
    Inventors: Amir Asif, Alicia E. Chin, Yonggang Hu, Zhenhua Hu, Vida Movahedi
  • Patent number: 10186272
    Abstract: The present invention provides a bandwidth extension method and apparatus. The method includes: acquiring a bandwidth extension parameter, where the bandwidth extension parameter includes one or more of the following parameters: a linear predictive coefficient (LPC), a line spectral frequency (LSF) parameter, a pitch period, a decoding rate, an adaptive codebook contribution, and an algebraic codebook contribution; and performing, according to the bandwidth extension parameter, bandwidth extension on a decoded low frequency band signal, to obtain a high frequency band signal. The high frequency band signal recovered by using the bandwidth extension method and apparatus in the embodiments of the present invention is close to an original high frequency band signal, and the quality is satisfactory.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: January 22, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zexin Liu, Lei Miao, Bin Wang
  • Patent number: 10178034
    Abstract: The present invention extends to methods, systems, and computing system program products for iteratively calculating autocorrelation function for streamed data in real time by iteratively calculating one or more components of autocorrelation function. Embodiments of the invention include iteratively calculating one or more components of autocorrelation function at a specified range of lags in an adjusted computation window based on the one or more components of the autocorrelation function at the specified range of lags calculated for a previous computation window and then calculating the autocorrelation function at the specified range of lags using the iteratively calculated components. Iteratively calculating autocorrelation function avoids visiting all data elements in the adjusted computation window and performing redundant computations thereby increasing calculation efficiency, saving computing resources and reducing computing system's power consumption.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: January 8, 2019
    Assignee: CLOUD & STREAM GEARS LLC
    Inventor: Jizhu Lu
  • Patent number: 10163447
    Abstract: A method includes filtering, at a speech encoder, an audio signal into a first group of sub-bands within a first frequency range and a second group of sub-bands within a second frequency range. The method also includes generating a harmonically extended signal based on the first group of sub-bands. The method further includes generating a third group of sub-bands based, at least in part, on the harmonically extended signal. The third group of sub-bands corresponds to the second group of sub-bands. The method also includes determining a first adjustment parameter for a first sub-band in the third group of sub-bands or a second adjustment parameter for a second sub-band in the third group of sub-bands. The first adjustment parameter is based on a metric of a first sub-band in the second group of sub-bands, and the second adjustment parameter is based on a metric of a second sub-band in the second group of sub-bands.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: December 25, 2018
    Assignee: QUALCOMM Incorporated
    Inventors: Venkatesh Krishnan, Venkatraman S. Atti
  • Patent number: 10163448
    Abstract: The purpose of the present invention is to estimate, with a small amount of computation, a linear prediction synthesis filter after conversion of an internal sampling frequency. A linear prediction coefficient conversion device is a device that converts first linear prediction coefficients calculated at a first sampling frequency to second linear prediction coefficients at a second sampling frequency different from the first sampling frequency, which includes a means for calculating, on the real axis of the unit circle, a power spectrum corresponding to the second linear prediction coefficients at the second sampling frequency based on the first linear prediction coefficients or an equivalent parameter, a means for calculating, on the real axis of the unit circle, autocorrelation coefficients from the power spectrum, and a means for converting the autocorrelation coefficients to the second linear prediction coefficients at the second sampling frequency.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: December 25, 2018
    Assignee: NTT DOCOMO, INC.
    Inventors: Nobuhiko Naka, Vesa Ruoppila
  • Patent number: 10152274
    Abstract: A method and an apparatus for reading/writing data from/into a flash memory, and user equipment are presented. The method includes receiving a read data instruction, where the read data instruction includes a size of to-be-read data and a physical address of the to-be-read data in the flash memory; searching a buffer for the physical address; when the physical address is not found in the buffer, dividing a buffer data area from internal memory according to the size of the to-be-read data and an actual physical block size of the flash memory; and reading the to-be-read data from the flash memory according to the physical address and buffering the to-be-read data into the buffer data area.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: December 11, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zhigang Li, Guojun Shi, Yingchun Zhao
  • Patent number: 10152983
    Abstract: A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The coding apparatus may down-sample an input signal, perform core coding on the down-sampled input signal, perform frequency transformation on the input signal, and perform bandwidth extension coding by using a base signal of the input signal in a frequency domain.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: December 11, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-hyun Choo, Eun-mi Oh, Ho-sang Sung
  • Patent number: 10134406
    Abstract: Present disclosure provide a linear prediction-based noise signal processing method includes: acquiring a noise signal, and obtaining a linear prediction coefficient according to the noise signal; filtering the noise signal according to the linear prediction coefficient, to obtain a linear prediction residual signal; obtaining a spectral envelope of the linear prediction residual signal according to the linear prediction residual signal; and encoding the spectral envelope of the linear prediction residual signal. According to the noise processing method, the noise generation method, the encoder, the decoder, and the encoding and decoding system that are in the embodiments of the present disclosure, more spectral details of an original background noise signal can be recovered, so that comfort noise can be closer to original background noise in terms of subjective auditory perception of a user, and subjective perception quality of the user is improved.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: November 20, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Zhe Wang
  • Patent number: 10115413
    Abstract: An autocorrelation calculating part calculates autocorrelation Ro(i) from an input signal. A predictive coefficient calculating part performs linear predictive analysis using modified autocorrelation R?o(i) obtained by multiplying the autocorrelation Ro(i) by a coefficient wo(i). Here, it is assumed that a case where, for at least part of each order i, the coefficient wo(i) corresponding to each order i monotonically increases as a value having negative correlation with a fundamental frequency of an input signal in a current frame or a past frame increases and a case where the coefficient wo(i) monotonically decreases as a value having positive correlation with a pitch gain in a current frame or a past frame increases, are included.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: October 30, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yutaka Kamamoto, Takehiro Moriya, Noboru Harada
  • Patent number: 10074375
    Abstract: A weighting function determination method includes obtaining a line spectral frequency (LSF) coefficient or an immitance spectral frequency (ISF) coefficient from a linear predictive coding (LPC) coefficient of an input signal and determining a weighting function by combining a first weighting function based on spectral analysis information and a second weighting function based on position information of the LSF coefficient or the ISF coefficient.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: September 11, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho-sang Sung, Eun-mi Oh
  • Patent number: 10056088
    Abstract: In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index indicating a periodicity and/or stationarity level, the index being included in or obtained from an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity and/or stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: August 21, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Noboru Harada, Yutaka Kamamoto
  • Patent number: 10049679
    Abstract: In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index indicating a periodicity and/or stationarity level, the index being included in or obtained from an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity and/or stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: August 14, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Noboru Harada, Yutaka Kamamoto
  • Patent number: 10049680
    Abstract: In encoding, pitch periods for time series signals in a predetermined time interval are calculated, and a code corresponding thereto is output. In that encoding, the resolutions for expressing the pitch periods and/or a pitch period encoding mode are switched according to whether an index indicating a periodicity and/or stationarity level of the time series signals satisfies a condition indicating high or low in periodicity and/or stationarity. In that decoding, according to whether an index indicating a periodicity and/or stationarity level, the index being included in or obtained from an input code corresponding to the predetermined time interval, satisfies a condition indicating high periodicity and/or stationarity, a decoding mode for a code, included in the input code, corresponding to pitch periods is switched to decode the code corresponding to the pitch periods to obtain the pitch periods corresponding to the predetermined time interval.
    Type: Grant
    Filed: October 5, 2017
    Date of Patent: August 14, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Noboru Harada, Yutaka Kamamoto
  • Patent number: 10038735
    Abstract: An exemplary method is implemented by end-user communication devices for transmitting and receiving HTTP messages in which acknowledgement of receipt by an addressee of an email is requested by an originator of the email. An acknowledgement request command is stored in a command portion of a user data segment of a received HTTP message. Upon receipt of the HTTP message by the addressee device, a reply HTTP message with an acknowledgement request must be authorized to be transmitted to the originator in order to allow the addressee to be able to view the content of the received HTTP message.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: July 31, 2018
    Assignee: Loment, Inc.
    Inventors: Venkata C. Majeti, Sri Sharmila Sripada, Madhur Mohan Vyas, Simon W. Zhang
  • Patent number: 10025560
    Abstract: A method of performing finite field addition and doubling operations in an elliptic curve cryptography (ECC) authentication scheme as a countermeasure to side-channel attack. The addition and doubling operations are executed using atomic patterns that involve the same sequence and number of operation types, so that the noise consumption and electromagnetic emanation profile of circuitry performing the operations is identical regardless of operation. A subtraction operation using such an atomic pattern is also disclosed.
    Type: Grant
    Filed: May 9, 2017
    Date of Patent: July 17, 2018
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventor: Eric Thierry Peeters
  • Patent number: 9997172
    Abstract: A system, method and computer program product are described for voice activity detection (VAD) within a digitally encoded bitstream. A parameter extraction module is configured to extract parameters from a sequence of coded frames from a digitally encoded bitstream containing speech. A VAD classifier is configured to operate with input of the digitally encoded bitstream to evaluate each coded frame based on bitstream coding parameter classification features to output a VAD decision indicative of whether or not speech is present in one or more of the coded frames.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: June 12, 2018
    Assignee: Nuance Communications, Inc.
    Inventors: Daniel A. Barreda, Jose E. G. Lainez, Dushyant Sharma, Patrick Naylor
  • Patent number: 9978388
    Abstract: A method for restoring distorted speech components of an audio signal distorted by a noise reduction or a noise cancellation includes determining distorted frequency regions and undistorted frequency regions in the audio signal. The distorted frequency regions include regions of the audio signal in which a speech distortion is present. Iterations are performed using a model to refine predictions of the audio signal at distorted frequency regions. The model is configured to modify the audio signal and may include deep neural network trained using spectral envelopes of clean or undamaged audio signals. Before each iteration, the audio signal at the undistorted frequency regions is restored to values of the audio signal prior to the first iteration; while the audio signal at distorted frequency regions is refined starting from zero at the first iteration. Iterations are ended when discrepancies of audio signal at undistorted frequency regions meet pre-defined criteria.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: May 22, 2018
    Assignee: Knowles Electronics, LLC
    Inventors: Carlos Avendano, John Woodruff
  • Patent number: 9953660
    Abstract: The present disclosure is directed towards a system and method for reducing tandeming effects in a communications system. The method may include receiving, at a speech decoder, an input bitstream associated with an incoming initial speech signal from a speech encoder. The method may further include determining whether or not coding is required and if coding is required, modifying an excitation signal associated with the bitstream. The method may also include providing the modified excitation signal to an adaptive encoder.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: April 24, 2018
    Assignee: Nuance Communications, Inc.
    Inventors: Qian-Yu Tang, Victor Zeyliger, Constantine V. Skidanenko
  • Patent number: 9947328
    Abstract: According to an aspect of the present invention, a method for reconstructing an audio signal having a baseband portion and a highband portion is disclosed. The method includes obtaining a decoded baseband audio signal by decoding an encoded audio signal and obtaining a plurality of subband signals by filtering the decoded baseband audio signal. The method further includes generating a high-frequency reconstructed signal by copying a number of consecutive subband signals of the plurality of subband signals and obtaining an envelope adjusted high-frequency signal. The method further includes generating a noise component based on a noise parameter. Finally, the method includes adjusting a phase of the high-frequency reconstructed signal and obtaining a time-domain reconstructed audio signal by combining the decoded baseband audio signal and the combined high-frequency signal to obtain a time-domain reconstructed audio signal.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 17, 2018
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Michael M. Truman, Mark S. Vinton
  • Patent number: 9923551
    Abstract: The invention is a method that combines the following components: a high pass filter designed to have sufficiently small phase delay and roll-off value in transition band as well as sufficiently good attenuation; a distortion detection and reconstruction introduced by the application of the high pass filter by extraction the significant frequency components in relevant frequency band; a signal compensation that reshapes the output of the high pass filter by matching the filter's phase delay and attenuation characteristics so as to approximate low frequency component extraction that would be produced by an ideal filter (very sharp frequency transition and no delay); a time-domain detection and correction method that addresses special circumstances under which the compensation would be inaccurate to achieve real-time estimate in normal circumstances, and a time-domain correction method during and immediately after sudden changes in composite signal (spike) is detected.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: March 20, 2018
    Assignee: ROLLS-ROYCE plc
    Inventors: Lily Rachmawati, Eng Yeow Cheu, Anna Swider, Martijn De Jongh, Eivind Vinje
  • Patent number: 9911407
    Abstract: A system and method are presented for the synthesis of speech from provided text. Particularly, the generation of parameters within the system is performed as a continuous approximation in order to mimic the natural flow of speech as opposed to a step-wise approximation of the feature stream. Provided text may be partitioned and parameters generated using a speech model. The generated parameters from the speech model may then be used in a post-processing step to obtain a new set of parameters for application in speech synthesis.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: March 6, 2018
    Assignee: Interactive Intelligence Group, Inc.
    Inventors: Yingyi Tan, Aravind Ganapathiraju, Felix Immanuel Wyss
  • Patent number: 9911414
    Abstract: Techniques are described for detecting and/or validating audible taps, double-taps, or other tapped audio sequences generated by a user. A predicted voice signal is subtracted from an audio signal to produce a prediction error signal. The prediction error signal is analyzed in terms of dynamics and periodicity to determine whether it contains an audio pulse. In certain cases, prediction error signals corresponding to multiple microphones are analyzed to determine position information regarding the individual taps of a double-tap. A double-tap is validated and acted upon when the individual taps originate from the same location and the taps occur within a given time period.
    Type: Grant
    Filed: December 20, 2013
    Date of Patent: March 6, 2018
    Assignee: Amazon Technologies, Inc.
    Inventor: Jun Yang
  • Patent number: 9892739
    Abstract: Embodiments of the present invention provide a signal decoding method and device. The method includes decoding a bit stream of a voice signal or an audio signal to acquire a decoded signal; predicting an excitation signal of an extension band according to the decoded signal, where the extension band is adjacent to a band of the decoded signal, and the band of the decoded signal is lower than the extension band; selecting a first band and a second band from the decoded signal, and predicting a spectral envelope of the extension band according to a spectral coefficient of the first band and a spectral coefficient of the second band; and determining a frequency-domain signal of the extension band according to the spectral envelope of the extension band and the excitation signal of the extension band.
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: February 13, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Zexin Liu, Lei Miao
  • Patent number: 9886962
    Abstract: A computer-implemented method performed by a data processing apparatus includes receiving an audio signal that includes a frequency-domain representation of an audio file, extracting, from the audio signal, a plurality of frequency-domain data values that correspond to at least a portion of the audio file, compressing the plurality of data values to form a compressed frequency domain value file, and transmitting the compressed frequency domain value file to a server to identify the audio file.
    Type: Grant
    Filed: March 2, 2015
    Date of Patent: February 6, 2018
    Assignee: GOOGLE LLC
    Inventors: Giovanni Motta, Yang Lu
  • Patent number: 9881624
    Abstract: A method is provided. The method includes obtaining a low-band spectrum of an audio signal in which a low-band signal is frequency transformed; obtaining phase information of a high-band spectrum of the audio signal based on the low-band spectrum; and outputting a bitstream that comprises the phase information of the high-band spectrum.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: January 30, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION
    Inventors: Ki-hyun Choo, Ho-chong Park, Eun-mi Oh
  • Patent number: 9881626
    Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: January 30, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Fuwei Ma, Dejun Zhang, Lei Miao, Fengyan Qi
  • Patent number: 9881597
    Abstract: The present document relates to audio coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR), and to digital effect processors, e.g. so-called exciters, where generation of harmonic distortion adds brightness to the processed signal. In particular, a system configured to generate a high frequency component of a signal from a low frequency component of the signal is described. The system may comprise an analysis filter bank (501) configured to provide a set of analysis subband signals from the low frequency component of the signal; wherein the set of analysis subband signals comprises at least two analysis subband signals; wherein the analysis filter bank (501) has a frequency resolution of ?f.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: January 30, 2018
    Assignee: Dolby International AB
    Inventors: Per Ekstrand, Lars Villemoes, Per Hedelin
  • Patent number: 9872045
    Abstract: A method, electronic device, computer program product, system and circuit assembly are provided for allocating one or more redundant pictures by taking into consideration the information content of the primary pictures, with which the redundant pictures would be associated. In particular, primary pictures that are determined to be more sensitive to transmission loss or corruption may be allocated one or more redundant pictures, while those that are less sensitive may not be so allocated. By selectively allocating redundant pictures to only those primary pictures that are more sensitive, the method disclosed reduces the amount of overhead associated with redundant pictures and increases the coding efficiency, without sacrificing the integrity of the video data.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: January 16, 2018
    Assignee: Conversant Wireless Licensing S.a r.l.
    Inventors: Chunbo Zhu, Ye-Kui Wang, Houqiang Li
  • Patent number: 9859917
    Abstract: Disclosed are methods and systems for significantly compressing sparse multidimensional ordered series data comprised of indexed data sets, wherein each data set comprises an index, a first variable and a second variable. The methods and systems are particularly suited for compression of data recorded in double precision floating point format.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: January 2, 2018
    Assignee: Protein Metrics Inc.
    Inventor: Doron Kletter
  • Patent number: 9852739
    Abstract: In a method for coding of information for enhancing a background noise representation, voice activity of an input speech signal is determined. A noisiness parameter is determined for an inactive speech signal, wherein the noisiness parameter is based on a ratio of prediction gains of two Linear Predictive Coder (LPC) prediction filters with different orders. The noisiness parameter is quantized, and the quantized noisiness parameter is encoded for transmission.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: December 26, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Stefan Bruhn
  • Patent number: 9852740
    Abstract: A high quality speech is reproduced with a small data amount in speech coding and decoding for performing compression coding and decoding of a speech signal to a digital signal. In speech coding method according to a code-excited linear prediction (CELP) speech coding, a noise level of a speech in a concerning coding period is evaluated by using a code or coding result of at least one of spectrum information, power information, and pitch information, and various excitation codebooks are used based on an evaluation result.
    Type: Grant
    Filed: February 12, 2016
    Date of Patent: December 26, 2017
    Assignee: BlackBerry Limited
    Inventor: Tadashi Yamaura
  • Patent number: 9847095
    Abstract: Provided are a method and apparatus for encoding and decoding an audio signal. According to the present application, a signal of a high frequency band above a preset frequency band is adaptively encoded or decoded in the time domain or in the frequency domain by using a signal of a low frequency band below the preset frequency band. As such, the sound quality of a high frequency signal is not deteriorate even when an audio signal is encoded or decoded by using a small number of bits and thus coding efficiency may be maximized.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: December 19, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chang-yong Son, Eun-mi Oh, Ki-hyun Choo, Jung-hoe Kim
  • Patent number: 9817379
    Abstract: A system and method for encouraging an energy user to conserve energy by providing the user with musical feedback describing their energy use as a musical piece. Various musical parameters of the musical piece may be manipulated to describe higher- or lower-than-expected energy use, in order to encourage the user to conserve energy. A visual animation may also be added to the musical piece to illustrate it further.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: November 14, 2017
    Inventor: David Krinkel