Linear Prediction Patents (Class 704/219)
  • Patent number: 10811022
    Abstract: A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The decoding apparatus may include: a mode checking unit to check mode information of each of frames included in a bitstream; a first core decoding unit to perform code excited linear prediction (CELP) decoding on a CELP coded frame, when a core coding mode of a low-frequency signal indicates a CELP coding mode; a first extension decoding unit to generate a decoded signal of a high-frequency band by using at least one of a result of the performing the CELP decoding and an excitation signal of the low-frequency signal; a second core decoding unit to perform audio decoding on an audio coded frame, when the core coding mode indicates an audio coding mode; and a second extension decoding unit to generate a decoded signal of the high-frequency band by performing frequency-domain (FD) extension decoding.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: October 20, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-hyun Choo, Eun-mi Oh, Ho-sang Sung
  • Patent number: 10811019
    Abstract: A spectrum encoding method includes selecting an important spectral component in band units for a normalized spectrum and encoding information of the selected important spectral component for a band, based on a number, a position, a magnitude and a sign thereof. A spectrum decoding method includes obtaining from a bitstream, information about an important spectral component for a band of an encoded spectrum and decoding the obtained information of the important spectral component, based on a number, a position, a magnitude and a sign of the important spectral component.
    Type: Grant
    Filed: February 22, 2019
    Date of Patent: October 20, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Ho-sang Sung
  • Patent number: 10778991
    Abstract: Encoding of a video file includes determining a plurality of scenes associated with a video file, and determining at least one group of pictures (GOP). Starting sequentially from a beginning frame of the video file, the system identifies a first GOP having a first encoding error characteristic. The system changes a bitrate allocation setting from a first setting to a second setting based on the encoding error characteristic. The system identifies a second frame having a second encoding error characteristic, and changes a second bitrate allocation setting from the second setting to a third setting based on the second encoding error characteristic. The system generates an encoded video file that includes an encoded plurality of scenes.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: September 15, 2020
    Assignee: Amazon Technologies, Inc.
    Inventors: Amarsingh B Winston, Deepthi Nandakumar, Avisar Ten-Ami
  • Patent number: 10771621
    Abstract: Systems, methods, and devices are disclosed for detecting an active speaker in a two-way conference. Real time audio in one or more sub band domains are analyzed according to an echo cancellor model. Based on the analyzed real time audio, one or more audio metrics are determined from output from an acoustic echo cancellation linear filter. The one or more audio metrics are weighted based on a priority, and a speaker status is determined based on the weighted one or more audio metrics being analyzed according to an active speaker detection model. For an active speaker status, one or more residual echo or noise is removed from the real time audio based on the one or more audio metrics.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: September 8, 2020
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Fuling Liu, Eric Chen, Wei Li, Wei-Lien Hsu
  • Patent number: 10762908
    Abstract: An audio packet error concealment system includes an encoding unit for encoding an audio signal consisting of a plurality of frames, and an auxiliary information encoding unit for estimating and encoding auxiliary information about a temporal change of power of the audio signal. The auxiliary information is used in packet loss concealment in decoding of the audio signal. The auxiliary information about the temporal change of power may contain a parameter that functionally approximates a plurality of powers of subframes shorter than one frame, or may contain information about a vector obtained by vector quantization of a plurality of powers of subframes shorter than one frame.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: September 1, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Kimitaka Tsutsumi, Kei Kikuiri
  • Patent number: 10742231
    Abstract: The present disclosure relates to a compression/encoding apparatus and method, a decoding apparatus and method, and a program that allow for provision of a lossless compression technology with higher compression ratio. A GOB data configuration section configures GOB data with a group of digital data that includes a plurality of blocks by treating a frame of delta-sigma-modulated digital data as a block. A table generation section generates a conversion table for encoding the GOB data. An encoding section compresses and encodes the digital data of each block included in the GOB data by using the conversion table. The present technology is applicable, for example, to audio signal compression and encoding, and so on.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: August 11, 2020
    Assignee: Sony Corporation
    Inventors: Takao Fukui, Toru Chinen
  • Patent number: 10735775
    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: March 19, 2019
    Date of Patent: August 4, 2020
    Assignee: Conversant Wireless Licensing S.a r.l.
    Inventors: Chunbo Zhu, Ye-Kui Wang, Houqiang Li
  • Patent number: 10734002
    Abstract: The invention provides methods and devices for outputting a stereo audio signal having a left channel and a right channel. The apparatus includes a demultiplexer, decoder, and upmixer. The upmixer is configured operate either in a prediction mode or a non-prediction mode based on a parameter encoded in the audio bitstream.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: August 4, 2020
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Pontus Carlsson, Lars Villemoes
  • Patent number: 10734009
    Abstract: An envelope sequence is provided that can improve approximation accuracy near peaks caused by the pitch period of an audio signal. A periodic-combined-envelope-sequence generation device according to the present invention takes, as an input audio signal, a time-domain audio digital signal in each frame, which is a predetermined time segment, and generates a periodic combined envelope sequence as an envelope sequence. The periodic-combined-envelope-sequence generation device according to the present invention comprises at least a spectral-envelope-sequence calculating part and a periodic-combined-envelope generating part. The spectral-envelope-sequence calculating part calculates a spectral envelope sequence of the input audio signal on the basis of time-domain linear prediction of the input audio signal.
    Type: Grant
    Filed: December 21, 2018
    Date of Patent: August 4, 2020
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Noboru Harada
  • Patent number: 10734003
    Abstract: A linear prediction-based noise signal processing method, includes obtaining a linear prediction coefficient of the noise signal, filtering a signal derived from the noise signal based on the linear prediction coefficient in order to obtain a linear prediction residual signal, obtaining excitation energy of the linear prediction residual signal and a spectral envelope of the linear prediction residual signal, and the spectral envelope, the excitation energy and the linear prediction coefficient are encoded.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: August 4, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhe Wang
  • Patent number: 10720172
    Abstract: An encoder for encoding an audio signal, audio transmission system and method for determining correction values includes an analyzer for analyzing the audio signal and for determining analysis prediction coefficients from the audio signal. Including a converter for deriving converted prediction coefficients from the analysis prediction coefficients, a memory for storing a multitude of correction values and a calculator. The calculator includes a processor for processing the converted prediction coefficients to obtain spectral weighting factors and a combiner for combining the spectral weighting factors and the multitude of correction values to obtain corrected weighting factors. A quantizer of the calculator is configured for quantizing the converted prediction coefficients using the corrected weighting factors obtaining a quantized representation of the converted prediction coefficients.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: July 21, 2020
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Konstantin Schmidt, Guillaume Fuchs, Matthias Neusinger, Martin Dietz
  • Patent number: 10714107
    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: November 14, 2018
    Date of Patent: July 14, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Nobuhiko Naka, Vesa Ruoppila
  • Patent number: 10714108
    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: November 14, 2018
    Date of Patent: July 14, 2020
    Assignee: NTT DOCOMO, INC.
    Inventors: Nobuhiko Naka, Vesa Ruoppila
  • Patent number: 10686466
    Abstract: A method for differentiator-based compression of digital data includes (a) using a subtraction module, subtracting a predicted signal from a sample of an original signal to obtain an error signal, (b) using a quantization module, quantizing the error signal to obtain a quantized error signal, and (c) generating the predicted signal using a least means square (LMS)-based filtering method.
    Type: Grant
    Filed: July 3, 2019
    Date of Patent: June 16, 2020
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventors: Mu Xu, Zhensheng Jia, Jing Wang, Luis Alberto Campos
  • Patent number: 10679638
    Abstract: The coding efficiency of an audio codec using a controllable—switchable or even adjustable—harmonic filter tool is improved by performing the harmonicity-dependent controlling of this tool using a temporal structure measure in addition to a measure of harmonicity in order to control the harmonic filter tool. In particular, the temporal structure of the audio signal is evaluated in a manner which depends on the pitch. This enables to achieve a situation-adapted control of the harmonic filter tool so that in situations where a control made solely based on the measure of harmonicity would decide against or reduce the usage of this tool, although using the harmonic filter tool would, in that situation, increase the coding efficiency, the harmonic filter tool is applied, while in other situations where the harmonic filter tool may be inefficient or even destructive, the control reduces the appliance of the harmonic filter tool appropriately.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: June 9, 2020
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Goran Markovic, Christian Helmrich, Emmanuel Ravelli, Manuel Jander, Stefan Doehla
  • Patent number: 10657973
    Abstract: A method including decomposing a magnitude part of a signal spectrum of a mixture signal into spectral components, each spectral component including a frequency part and a time activation part; and clustering the spectral components to obtain one or more clusters of spectral components, wherein the clustering of the spectral components is computed in the time domain.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: May 19, 2020
    Assignee: SONY CORPORATION
    Inventors: Xin Guo, Stefan Uhlich, Yuhki Mitsufuji
  • Patent number: 10657937
    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: April 5, 2019
    Date of Patent: May 19, 2020
    Assignee: Dolby International AB
    Inventors: Per Ekstrand, Lars Villemoes, Per Hedelin
  • Patent number: 10635068
    Abstract: The current disclosure provides a method for transmitting encoded information signals through a control system and to a decoder. The encoded information signals are transmitted along with control signals as an encoded message. The information signals are encoded based at least in part on a control-coding capacity of the control system.
    Type: Grant
    Filed: March 16, 2017
    Date of Patent: April 28, 2020
    Inventor: Charalambos D. Charalambous
  • Patent number: 10636421
    Abstract: A speech-based human-machine interface that parses words spoken to detect a complete parse and, responsive to so detecting, computes a hypothesis as to whether the words are a prefix to another complete parse. The duration of no voice activity period to determine an end of a sentence depends on the prefix hypothesis. The user's typical speech speed profile and a short-term measure of speech speed also scale the period. Speech speed is measured by the time between words, and the period scaling uses a continuously adaptive algorithm. The system uses a longer cut-off period after a system wake-up event but before it detects any voice activity.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: April 28, 2020
    Assignee: SOUNDHOUND, INC.
    Inventors: Jennifer Hee Young Zhang, Patricia Pozon Aguayo, Jonah Probell
  • Patent number: 10622005
    Abstract: A method and device for automatically increasing the spectral bandwidth of an audio signal including generating a “mapping” (or “prediction”) matrix based on the analysis of a reference wideband signal and a reference narrowband signal, the mapping matrix being a transformation matrix to predict high frequency energy from a low frequency energy envelope, generating an energy envelope analysis of an input narrowband audio signal, generating a resynthesized noise signal by processing a random noise signal with the mapping matrix and the envelope analysis, high-pass filtering the resynthesized noise signal, and summing the high-pass filtered resynthesized noise signal with the input narrowband audio signal. Other embodiments are disclosed.
    Type: Grant
    Filed: July 27, 2018
    Date of Patent: April 14, 2020
    Assignee: Staton Techiya, LLC
    Inventors: John Usher, Dan Ellis
  • Patent number: 10622001
    Abstract: A Unified Speech and Audio Codec (USAC) that may process a window sequence based on mode switching is provided. The USAC may perform encoding or decoding by overlapping between frames based on a folding point when mode switching occurs. The USAC may process different window sequences for each situation to perform encoding or decoding, and thereby may improve a coding efficiency.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: April 14, 2020
    Assignees: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, KWANGWOON UNIVERSITY INDUSTRY-ACADEMIC COLLABORATION FOUNDATION
    Inventors: Seungkwon Beack, Tae Jin Lee, Min Je Kim, Kyeongok Kang, Dae Young Jang, Jeongil Seo, Jin Woo Hong, Chieteuk Ahn, Ho Chong Park, Young-cheol Park
  • Patent number: 10614339
    Abstract: According to an example aspect of the present invention, there is provided an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to provide an input data item to a first convolutional layer of an artificial neural network comprising a set of convolutional layers, process the input data item in the set of convolutional layers, define, in a feature map output from a last convolutional layer of the set of convolutional layers, a first feature map patch and a second feature map patch, and provide the first feature map patch to a first classifier and the second feature map patch to a second classifier.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: April 7, 2020
    Assignee: Nokia Technologies Oy
    Inventor: Xiaoheng Jiang
  • Patent number: 10607620
    Abstract: A decoder for processing an audio signal receives an audio bitstream, decodes the bitstream to obtain a set of spectral frequency parameters that are arranged in an order of frequencies, determines a minimum spectral frequency parameter difference from a plurality of calculated spectral frequency parameter differences, determines a start frequency bin for predicting a high band excitation signal according to the minimum spectral frequency parameter difference, generates the high band excitation signal by selecting a frequency band with a preset bandwidth selected from a low band excitation signal according to the start frequency bin, and synthesizes a wideband signal based on the generated high band excitation signal.
    Type: Grant
    Filed: May 20, 2019
    Date of Patent: March 31, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zexin Liu, Lei Miao
  • Patent number: 10607619
    Abstract: An encoder for encoding an audio signal has: an analyzer configured for deriving prediction coefficients and a residual signal from an unvoiced frame of the audio signal; a gain parameter calculator configured for calculating a first gain parameter information for defining a first excitation signal related to a deterministic codebook and for calculating a second gain parameter information for defining a second excitation signal related to a noise-like signal for the unvoiced frame; and a bitstream former configured for forming an output signal based on an information related to a voiced signal frame, the first gain parameter information and the second gain parameter information.
    Type: Grant
    Filed: April 1, 2019
    Date of Patent: March 31, 2020
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Guillaume Fuchs, Markus Multrus, Emmanuel Ravelli, Markus Schnell
  • Patent number: 10595025
    Abstract: A transmitting device for generating a plurality of encoded portions of a video to be transmitted to a receiving device over a network configured to: receive an error message over a feedback channel from the receiving device indicating at least one of said plurality of encoded portions that has been lost at the receiving device; encode a recovery portion responsive to said receiving said error message; and transmit said recovery portion to the receiving device over said network; wherein said error message includes information pertaining to a decoded portion successfully decoded at the receiving device and said recovery portion is encoded relative to said decoded portion.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: March 17, 2020
    Assignee: MICROSOFT TECHNOLOGY LICENSING, LLC
    Inventors: Ming-Chieh Lee, Amy Lu, Pontus Carlsson, Mattias Dan Nilsson, Sergey Sablin, Sergey Silkin, David Yuheng Zhao, Magnus Hemmendorff, Sergei Nikiforov
  • Patent number: 10580425
    Abstract: Proposed is a method and apparatus for determining a weighting function for quantizing a linear predictive coding (LPC) coefficient and having a low complexity. The weighting function determination apparatus may convert an LPC coefficient of a mid-subframe of an input signal to one of a immittance spectral frequency (ISF) coefficient and a line spectral frequency (LSF) coefficient, and may determine a weighting function associated with an importance of the ISF coefficient or the LSF coefficient based on the converted ISF coefficient or LSF coefficient.
    Type: Grant
    Filed: August 28, 2017
    Date of Patent: March 3, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ho Sang Sung, Eun Mi Oh
  • Patent number: 10580415
    Abstract: An apparatus for generating a bandwidth extended signal from a bandwidth limited audio signal, the bandwidth limited audio signal The patch generator is configured to perform a harmonic patching algorithm to obtain the patched signal. The signal manipulator is configured for manipulating a signal before patching or the patched signal. The timely preceding bandwidth limited time block timely precedes the current bandwidth limited time block in the plurality of consecutive bandwidth limited time blocks of the bandwidth limited audio signal. The combiner is configured for combining the bandwidth limited audio signal having the core frequency band and the manipulated patched signal having the upper frequency band to obtain the bandwidth extended signal.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: March 3, 2020
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Frederik Nagel, Stephan Wilde
  • Patent number: 10579684
    Abstract: A computer-implemented method for determining a relevance of a node in a network. A digital representation of a local neighborhood structure of the node in the network is obtained in a computer-readable non-volatile memory. A numerical value characteristic of the node's relevance is determined, and output to a user. The numerical value is determined based on the neighborhood structure of the node.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: March 3, 2020
    Assignee: Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
    Inventor: Glenn Lawyer
  • Patent number: 10573326
    Abstract: A method includes decoding a low-band mid channel bitstream to generate a low-band mid signal and a low-band mid excitation signal. The method further includes decoding a high-band mid channel bandwidth extension bitstream to generate a synthesized high-band mid signal. The method also includes determining an inter-channel bandwidth extension (ICBWE) gain mapping parameter corresponding to the synthesized high-band mid signal. The ICBWE gain mapping parameter is based on a selected frequency-domain gain parameter that is extracted from a stereo downmix/upmix parameter bitstream. The method further includes performing a gain scaling operation on the synthesized high-band mid signal based on the ICBWE gain mapping parameter to generate a reference high-band channel and a target high-band channel. The method includes outputting a first audio channel and a second audio channel. The first audio channel is based on the reference high-band channel, and the second audio channel is based on target high-band channel.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: February 25, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Patent number: 10552457
    Abstract: Systems and methods for the matching of datasets, such as input audio segments, with known datasets in a database are disclosed. In an illustrative embodiment, the use of the presently disclosed systems and methods is described in conjunction with recognizing known network message recordings encountered during an outbound telephone call. The methodologies include creation of a ternary fingerprint bitmap to make the comparison process more efficient. Also disclosed are automated methodologies for creating the database of known datasets from a larger collection of datasets.
    Type: Grant
    Filed: January 19, 2018
    Date of Patent: February 4, 2020
    Inventors: Kevin Vlack, Felix Immanuel Wyss
  • Patent number: 10553228
    Abstract: Disclosed are some examples of systems, apparatus, methods and computer program products implementing techniques for extending the range of a set of decoded parameter values for a sequence of frequency bands in an identifiable time frame of an audio signal. In some implementations, the parameter values vary in relation to a sequence of time frames of the audio signal and in relation to a sequence of frequency bands in each time frame. In some implementations, it is determined that a decoded value corresponds to a minimum of a first range of values of a first coding protocol of a set of coding protocols. The determined value is modified to be below the minimum of the first range of values to produce an extended value. A modified set of decoded values including one or more extended values can thus be provided.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: February 4, 2020
    Assignee: Dolby International AB
    Inventors: Heiko Purnhagen, Per Ekstrand, Harald Mundt, Klaus Peichl
  • Patent number: 10553222
    Abstract: A method includes selecting, at an encoder of a first device, a left channel or a right channel as a non-reference target channel based on a high-band reference channel indicator. The method also includes generating a synthesized non-reference high-band channel based on a non-reference high-band excitation corresponding to the non-reference target channel. The method also includes generating a high-band portion of the non-reference target channel. The method further includes estimating one or more spectral mapping parameters based on the synthesized non-reference high-band channel and the high-band portion of the non-reference target channel. The method also includes applying the one or more spectral mapping parameters to the synthesized non-reference high-band channel to generate a spectrally shaped synthesized non-reference high-band channel.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: February 4, 2020
    Assignee: Qualcomm Incorporated
    Inventors: Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Venkatraman Atti
  • Patent number: 10529346
    Abstract: A calculator for determining phase correction data for an audio signal includes a variation determiner for determining a variation of a phase of the audio signal in a first and a second variation mode, a variation comparator for comparing a first variation determined using the first variation mode and a second variation determined using the second variation mode, and a correction data calculator for calculating the phase correction data in accordance with the first variation mode or the second variation mode based on a result of the comparing.
    Type: Grant
    Filed: December 28, 2016
    Date of Patent: January 7, 2020
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Sascha Disch, Mikko-Ville Laitinen, Ville Pulkki
  • Patent number: 10529351
    Abstract: The present disclosure relates methods and apparatus for recovering a lost frame in a received audio signal. One example method includes obtaining an initial high-frequency band signal of a current lost frame in the received audio signal, calculating a ratio R, where 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.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: January 7, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Bin Wang, Zexin Liu, Lei Miao
  • Patent number: 10522161
    Abstract: An audio signal decoding apparatus is provided that includes a receiver that receives an encoded information, a memory, and a processor that demultiplexes the encoded information, including encoding parameters that are used for decoding a low frequency spectrum and index information that identifies a most, correlated portion from a low frequency spectrum for one or more high frequency subbands. The processor also replicates a high frequency subband spectrum based on the index information using a synthesized low frequency spectrum, the synthesized low frequency spectrum being obtained by decoding the encoding parameters. The processor further estimates a frequency of a harmonic component in the synthesized low frequency spectrum, adjusts a frequency of a harmonic component in the high frequency subband spectrum using the estimated harmonic frequency, and generates an output signal using the synthesized low frequency spectrum and the high frequency subband spectrum.
    Type: Grant
    Filed: December 13, 2018
    Date of Patent: December 31, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Srikanth Nagisetty, Zongxian Liu
  • Patent number: 10524062
    Abstract: A hearing aid includes a microphone for converting sound into an audio input signal, a hearing loss processor, an adaptive feedback suppressor configured for generation of a feedback suppression signal by modelling a feedback signal path of the hearing aid, a subtractor coupled to an output of the adaptive feedback suppressor, wherein the subtractor is configured for subtracting the feedback suppression signal from the audio input signal, and outputting a feedback compensated audio signal to the hearing loss processor, and wherein the hearing loss processor is configured for processing the feedback compensated audio signal in accordance with a hearing loss of a user of the hearing aid, a synthesizer configured for generation of a synthesized signal based at least on a sound model and the audio input signal, and a receiver for generating an output sound signal based at least on the synthesized signal.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: December 31, 2019
    Assignee: GN HEARING A/S
    Inventors: Karl-Fredrik Johan Gran, Guilin Ma
  • Patent number: 10504525
    Abstract: A method of encoding audio information for forward error correction reconstruction of a transmitted audio stream over a lossy packet switched network, the method including the steps of: (a) dividing the audio stream into audio frames; (b) determining a series of corresponding audio frequency bands for the audio frames; (c) determining a series of power envelopes for the frequency bands; (d) encoding the envelopes as a low bit rate version of the audio frame in a redundant transmission frame.
    Type: Grant
    Filed: October 7, 2016
    Date of Patent: December 10, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Xuejing Sun, Kai Li, Mark S. Vinton, Shen Huang
  • Patent number: 10475457
    Abstract: A method includes decoding a low-band portion of an encoded mid channel to generate a decoded low-band mid channel. The method also includes filtering the decoded low-band mid channel according to one or more filter coefficients to generate a low-band filtered mid channel. The method also includes generating an inter-channel predicted signal based on the low-band filtered mid channel and the inter-channel prediction gain. The method further includes generating a low-band left channel and a low-band right channel based on an up-mix factor, the decoded low-band mid channel, and the inter-channel predicted signal.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: November 12, 2019
    Assignee: Qualcomm Incorporated
    Inventors: Venkatraman Atti, Venkata Subrahmanyam Chandra Sekhar Chebiyyam, Daniel Jared Sinder
  • Patent number: 10460749
    Abstract: A voice activity detection (VAD) system includes an input processing module configured to receive an acoustic signal, convert the acoustic signal into an analog signal, and subsequently, a digital signal; an energy-based detection module configured to receive one of the analog/digital signals and determine a sound activity decision; an area-function-based detection module configured to derive an area-related function from the digital signal and use a machine learning method to output an area-based decision according to the area related function; and a VAD decision module configured to make a final VAD decision based on the sound activity decision from the energy-based detection module and the area-based decision from the area-function-based detection module.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: October 29, 2019
    Assignee: NUVOTON TECHNOLOGY CORPORATION
    Inventors: Powen Ru, Alex Paiz
  • Patent number: 10462063
    Abstract: A method to detect a packet includes: receiving an input sequence including preambles; detecting a transition from a noise period to a signal period in the input sequence; dynamically adjusting a gain of the input sequence in response to the signal period being initiated; and distinguishing an intended packet from other packets, among packets received in the preambles.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: October 29, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ashutosh Deepak Gore, Sujit Jos, Jinesh P. Nair, Chang Soon Park, Kiran Bynam, Young Jun Hong
  • Patent number: 10452719
    Abstract: A terminal apparatus is provided. The terminal apparatus includes an input unit configured to receive an input of a search word related to a content to be searched for, a search unit including a processor configured to search for a time range corresponding to the content using the input search word and pre-stored log information, and to search for log information within the searched time range, and a display unit configured to display information regarding a list of contents corresponding to the searched log information.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: October 22, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-tak Choi, Sang-wook Cho
  • Patent number: 10453466
    Abstract: A method and apparatus for performing coding and decoding for high-frequency bandwidth extension. The coding apparatus may classify a coding mode of a low-frequency signal of an input signal based on characteristics of the low-frequency signal of an input signal, perform code excited linear prediction coding or audio coding on the LPC excitation signal of the low-frequency signal of an input signal, and perform time-domain (TD) extension coding or frequency-domain (FD) extension coding on a high-frequency signal of an input signal. When the FD extension coding is performed, the coding apparatus may generate a base excitation signal for a high band using an input spectrum, obtain an energy control factor of a sub-band in a frame using the base excitation signal and the input spectrum, generate an energy signal based on the input spectrum and the energy control factor, for the sub-band in the frame, and quantize the energy signal.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: October 22, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki-hyun Choo, Eun-mi Oh, Ho-sang Sung
  • Patent number: 10438601
    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: November 19, 2017
    Date of Patent: October 8, 2019
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Stefan Bruhn
  • Patent number: 10418043
    Abstract: An apparatus and method for encoding and decoding a signal for high frequency bandwidth extension are provided. An encoding apparatus may down-sample a time domain input signal, may core-encode the down-sampled time domain input signal, may transform the core-encoded time domain input signal to a frequency domain input signal, and may perform bandwidth extension encoding using a basic signal of the frequency domain input signal.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: September 17, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ki Hyun Choo, Eun Mi Oh, Ho Sang Sung
  • Patent number: 10418042
    Abstract: A coding method and a decoding method are provided which can use in combination a predictive coding and decoding method which is a coding and decoding method that can accurately express coefficients which are convertible into linear prediction coefficients with a small code amount and a coding and decoding method that can obtain correctly, by decoding, coefficients which are convertible into linear prediction coefficients of the present frame if a linear prediction coefficient code of the present frame is correctly input to a decoding device.
    Type: Grant
    Filed: March 16, 2015
    Date of Patent: September 17, 2019
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takehiro Moriya, Yutaka Kamamoto, Noboru Harada
  • Patent number: 10404519
    Abstract: A method for determining a noise shaped quantized parameter contributing to generation of an output signal comprises estimating an error within the output signal using a quantization of the parameter and a quantization of a further parameter contributing to generation of the output signal. The quantization of the parameter is used as the noise shaped quantized parameter according to a selection criterion.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: September 3, 2019
    Assignee: Intel IP Corporation
    Inventors: Andreas Menkhoff, Mohamed Ibrahim
  • Patent number: 10405093
    Abstract: Example embodiments disclosed herein relate to separated audio analysis and processing. A system for processing an audio signal is disclosed. The system includes an audio analysis module configured to analyze an input audio signal to determine a processing parameter for the input audio signal, the input audio signal being represented in time domain. The system also includes an audio processing module configured to process the input audio signal in parallel with the audio analysis module. The audio processing module includes a time domain filter configured to filter the input audio signal to obtain an output audio signal in the time domain, and a filter controller configured to control a filter coefficient of the time domain filter based on the processing parameter determined by the audio analysis module. Corresponding method and computer program product of processing an audio signal are also disclosed.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: September 3, 2019
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Dong Shi, Xuejing Sun
  • Patent number: 10395644
    Abstract: A speech recognition method acquires sound information via multiple microphones, detects a sound source interval including sound from the sound information, acquires an estimated direction of speech by conducting direction estimation on a speech interval from among the sound source interval, conducts an adaptation process of using the sound information to estimate filter coefficients, decides a buffer size of the sound information to hold in a buffer, based on sound source interval information, estimated direction information, and adaptation process convergence state information, holds the sound information in the buffer according to the buffer size, conducts a beamforming process using the sound information held in the buffer and the filter coefficients to acquire speech information, and conducts speech recognition on the speech information acquired by the beamforming process.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: August 27, 2019
    Assignee: PANASONIC CORPORATION
    Inventors: Kohhei Hayashida, Tsuyoki Nishikawa
  • Patent number: 10388293
    Abstract: A spectrum encoding method includes selecting an important spectral component in band units for a normalized spectrum and encoding information of the selected important spectral component for a band, based on a number, a position, a magnitude and a sign thereof. A spectrum decoding method includes obtaining from a bitstream, information about an important spectral component for a band of an encoded spectrum and decoding the obtained information of the important spectral component, based on a number, a position, a magnitude and a sign of the important spectral component.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: August 20, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Ho-sang Sung
  • Patent number: 10381012
    Abstract: An audio decoder for providing a decoded audio information on the basis of an encoded audio information includes an error concealment configured to provide an error concealment audio information for concealing a loss of an audio frame following an audio frame encoded in a frequency domain representation using a time domain excitation signal.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: August 13, 2019
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Jérémie Lecomte, Goran Markovic, Michael Schnabel, Grzegorz Pietrzyk