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1. 发明授权

US11621725B2 Methods and devices for vector segmentation for coding 有权
公开(公告)号：US11621725B2
公开(公告)日：2023-04-04
申请号：US17572808
申请日：2022-01-11
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Tomas Jansson Toftgård , Volodya Grancharov , Jonas Svedberg
IPC分类号： H04N19/124 , H03M7/30 , H04N19/192 , H04N19/94 , G06F17/16 , G10L19/038
摘要： A method for partitioning of input vectors for coding is presented. The method comprises obtaining of an input vector. The input vector is segmented, in a non-recursive manner, into an integer number, NSEG, of input vector segments. A representation of a respective relative energy difference between parts of the input vector on each side of each boundary between the input vector segments is determined, in a recursive manner. The input vector segments and the representations of the relative energy differences are provided for individual coding. Partitioning units and computer programs for partitioning of input vectors for coding, as well as positional encoders, are presented.

2. 发明申请

US20230085596A1 Self-Supervised Audio Representation Learning for Mobile Devices 有权
公开(公告)号：US20230085596A1
公开(公告)日：2023-03-16
申请号：US17986477
申请日：2022-11-14
申请人： Google LLC
发明人： Beat Gfeller , Dominik Roblek , Félix de Chaumont Quitry , Marco Tagliasacchi
IPC分类号： G10L19/035 , G06N20/00 , G10L19/038 , G10L25/18
摘要： Systems and methods for training a machine-learned model are provided. A method can include can include obtaining an unlabeled audio signal, sampling the unlabeled audio signal to select one or more sampled slices, inputting the one or more sampled slices into a machine-learned model, receiving, as an output of the machine-learned model, one or more determined characteristics associated with the audio signal, determining a loss function for the machine-learned model based at least in part on a difference between the one or more determined characteristics and one or more corresponding ground truth characteristics of the audio signal, and training the machine-learned model from end to end based at least in part on the loss function. The one or more determined characteristics can include one or more reconstructed portions of the audio signal temporally adjacent to the one or more sampled slices or an estimated distance between two sampled slices.

3. 发明授权

US11462223B2 Stereo signal encoding method and apparatus, and stereo signal decoding method and apparatus 有权
公开(公告)号：US11462223B2
公开(公告)日：2022-10-04
申请号：US17135539
申请日：2020-12-28
申请人： Huawei Technologies Co., Ltd.
发明人： Eyal Shlomot , Jonathan Alastair Gibbs , Haiting Li
IPC分类号： G10L19/008 , G10L19/038 , G10L19/06 , G10L19/032 , G10L19/07
摘要： A stereo signal encoding method includes performing spectrum broadening on a quantized line spectral frequency (LSF) parameter of a primary channel signal in a current frame in a stereo signal to obtain a spectrum-broadened LSF parameter of the primary channel signal, determining a prediction residual of an LSF parameter of a secondary channel signal in the current frame based on an original LSF parameter of the secondary channel signal and the spectrum-broadened LSF parameter of the primary channel signal, and performing a quantization on the prediction residual of the LSF parameter of the secondary channel signal.

4. 发明授权

US11450329B2 Method and device for quantization of linear prediction coefficient and method and device for inverse quantization 有权
公开(公告)号：US11450329B2
公开(公告)日：2022-09-20
申请号：US16688482
申请日：2019-11-19
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Ho-Sang Sung
IPC分类号： G10L19/00 , G10L19/032 , G10L19/038
摘要： A quantization apparatus comprises: a first quantization module for performing quantization without an inter-frame prediction; and a second quantization module for performing quantization with an inter-frame prediction, and the first quantization module comprises: a first quantization part for quantizing an input signal; and a third quantization part for quantizing a first quantization error signal, and the second quantization module comprises: a second quantization part for quantizing a prediction error; and a fourth quantization part for quantizing a second quantization error signal, and the first quantization part and the second quantization part comprise a trellis structured vector quantizer.

5. 发明申请

US20220130403A1 METHOD AND DEVICE FOR QUANTIZING LINEAR PREDICTIVE COEFFICIENT, AND METHOD AND DEVICE FOR DEQUANTIZING SAME 有权
公开(公告)号：US20220130403A1
公开(公告)日：2022-04-28
申请号：US17571597
申请日：2022-01-10
申请人： SAMSUNG ELECTRONICS CO., LTD. , INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUS
发明人： Ho-sang SUNG , Sang-won Kang , Jong-hyun Kim , Eun-mi Oh
IPC分类号： G10L19/038 , G10L19/06 , G10L19/04 , G10L19/022
摘要： A quantization device includes: a trellis-structured vector quantizer which quantizes a first error vector between an N-dimensional (here, “N” is two or more) subvector and a first predictive vector; and an inter-frame predictor which generates a first predictive vector from the quantized N-dimensional subvector, wherein the inter-frame predictor uses a predictive coefficient comprising an N×N matrix and performs an inter-frame prediction using the quantized N-dimensional subvector of a previous stage.

6. 发明授权

US11264043B2 Apparatus for encoding a speech signal employing ACELP in the autocorrelation domain 有权
公开(公告)号：US11264043B2
公开(公告)日：2022-03-01
申请号：US16209610
申请日：2018-12-04
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Tom Baeckstroem , Markus Multrus , Guillaume Fuchs , Christian Helmrich , Martin Dietz
IPC分类号： G10L19/00 , G10L21/00 , G10L13/00 , G10L19/038 , G10L19/107
摘要： An apparatus for encoding a speech signal by determining a codebook vector of a speech coding algorithm is provided. The apparatus includes a matrix determiner for determining an autocorrelation matrix R, and a codebook vector determiner for determining the codebook vector depending on the autocorrelation matrix R. The matrix determiner is configured to determine the autocorrelation matrix R by determining vector coefficients of a vector r, wherein the autocorrelation matrix R includes a plurality of rows and a plurality of columns, wherein the vector r indicates one of the columns or one of the rows of the autocorrelation matrix R, wherein R(i, j)=r(|i−j|), wherein R(i, j) indicates the coefficients of the autocorrelation matrix R, wherein i is a first index indicating one of a plurality of rows of the autocorrelation matrix R, and wherein j is a second index indicating one of the plurality of columns of the autocorrelation matrix R.

7. 发明申请

US20210390963A1 AUDIO ENCODER AND DECODER 有权
公开(公告)号：US20210390963A1
公开(公告)日：2021-12-16
申请号：US17333527
申请日：2021-05-28
申请人： DOLBY INTERNATIONAL AB
发明人： Leif Jonas SAMUELSSON , Heiko PURNHAGEN
IPC分类号： G10L19/008 , G10L19/00 , G10L19/038 , H04S3/02
摘要： The present disclosure provides methods, devices and computer program products for encoding and decoding of a vector of parameters in an audio coding system. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system. According to the disclosure, a modulo differential approach for coding and encoding a vector of a non-periodic quantity may improve the coding efficiency and provide encoders and decoders with less memory requirements. Moreover, an efficient method for encoding and decoding a sparse matrix is provided.

8. 发明申请

US20210335375A1 CODING DEVICE, DECODING DEVICE, AND METHOD AND PROGRAM THEREOF 有权
公开(公告)号：US20210335375A1
公开(公告)日：2021-10-28
申请号：US17370060
申请日：2021-07-08
申请人： Nippon Telegraph and Telephone Corporation
发明人： Takehiro MORIYA , Yutaka KAMAMOTO , Noboru HARADA
IPC分类号： G10L19/07 , G10L19/038
摘要： 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. A coding device includes: a predictive coding unit that obtains a first code by coding a differential vector formed of differentials between a vector of coefficients which are convertible into linear prediction coefficients of more than one order of the present frame and a prediction vector containing at least a predicted vector from a past frame, and obtains a quantization differential vector corresponding to the first code; and a non-predictive coding unit that generates a second code by coding a correction vector which is formed of differentials between the vector of the coefficients which are convertible into the linear prediction coefficients of more than one order of the present frame and the quantization differential vector or formed of some of elements of the differentials.

9. 发明申请

US20210335373A1 CONCEPT FOR ENCODING OF INFORMATION 有权
公开(公告)号：US20210335373A1
公开(公告)日：2021-10-28
申请号：US17367009
申请日：2021-07-02
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Tom BAECKSTROEM , Christian FISCHER PEDERSEN , Johannes FISCHER , Matthias HUETTENBERGER , Alfonso PINO
IPC分类号： G10L19/07 , G10L19/12 , G10L19/06 , G10L19/02 , G10L19/038
摘要： An information encoder for encoding an information signal includes: a converter for converting the linear prediction coefficients of the predictive polynomial A(z) to frequency values f1 . . . fn of a spectral frequency representation of the predictive polynomial A(z), wherein the converter is configured to determine the frequency values f1 . . . fn by analyzing a pair of polynomials P(z) and Q(z) being defined as P ⁡ ( z ) = A ⁡ ( z ) + z - m - l ⁢ A ⁡ ( z - 1 ) ⁢ ⁢ and Q ⁡ ( z ) = A ⁡ ( z ) - z - m - l ⁢ A ⁡ ( z - 1 ) , wherein m is an order of the predictive polynomial A(z) and I is greater or equal to zero, wherein the converter is configured to obtain the frequency values by establishing a strictly real spectrum derived from P(z) and a strictly imaginary spectrum from Q(z) and by identifying zeros of the strictly real spectrum derived from P(z) and the strictly imaginary spectrum derived from Q(z).

10. 发明申请

US20210295855A1 DETERMINATION OF SPATIAL AUDIO PARAMETER ENCODING AND ASSOCIATED DECODING 有权
公开(公告)号：US20210295855A1
公开(公告)日：2021-09-23
申请号：US17257813
申请日：2019-06-20
申请人： Nokia Technologies Oy
发明人： Adriana Vasilache , Anssi Rämö , Lasse Laaksonen
IPC分类号： G10L19/02 , G10L19/002 , G10L19/038 , G10L19/008
摘要： An apparatus comprising means for: receiving values for sub-bands of a frame of an audio signal, the values comprising at least one azimuth value, at least one elevation value and at least one energy ratio value for each sub-band; determining an allocation of first number of bits to encode the values of the frame, wherein the first number of bits are fixed; encoding the at least one energy ratio value for a frame based on a defined allocation of a second number of bits from the first number of bits; encoding the at least one azimuth value and/or at least one elevation value of the frame based on a defined allocation of a third number of bits from the first number of bits, wherein the third number of bits is variably distributed on a sub-band-by-sub-band basis.

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