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1. 发明授权

US11616954B2 Signal encoding method and apparatus and signal decoding method and apparatus 有权
公开(公告)号：US11616954B2
公开(公告)日：2023-03-28
申请号：US17030466
申请日：2020-09-24
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Ho-sang Sung , Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L19/032 , H04N19/124 , H04N19/196 , H04N19/40 , G10L19/16 , G10L19/24 , H03M13/05 , H03M13/15 , H03M13/31 , G10L19/035 , G10L19/038 , G10L19/02
摘要： A spectrum coding method includes quantizing spectral data of a current band based on a first quantization scheme, generating a lower bit of the current band using the spectral data and the quantized spectral data, quantizing a sequence of lower bits including the lower bit of the current band based on a second quantization scheme, and generating a bitstream based on a upper bit excluding N bits, where N is 1 or greater, from the quantized spectral data and the quantized sequence of lower bits.

2. 发明授权

US11580999B2 Method and apparatus for encoding and decoding audio signal to reduce quantization noise 有权
公开(公告)号：US11580999B2
公开(公告)日：2023-02-14
申请号：US17331416
申请日：2021-05-26
申请人： Electronics and Telecommunications Research Institute
发明人： Seung Kwon Beack , Jongmo Sung , Mi Suk Lee , Tae Jin Lee , Woo-taek Lim , Inseon Jang
IPC分类号： G10L19/022 , G10L19/06 , G10L19/16 , G10L19/035
摘要： An audio signal encoding method performed by an encoder includes identifying an audio signal of a time domain in units of a block, generating a combined block by combining i) a current original block of the audio signal and ii) a previous original block chronologically adjacent to the current original block, extracting a first residual signal of a frequency domain from the combined block using linear predictive coding of a time domain, overlapping chronologically adjacent first residual signals among first residual signals converted into a time domain, and quantizing a second residual signal of a time domain extracted from the overlapped first residual signal by converting the second residual signal of the time domain into a frequency domain using linear predictive coding of a frequency domain.

3. 发明授权

US11501787B2 Self-supervised audio representation learning for mobile devices 有权
公开(公告)号：US11501787B2
公开(公告)日：2022-11-15
申请号：US16548146
申请日：2019-08-22
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.

4. 发明申请

US20220335956A1 QUANTIZATION OF SPATIAL AUDIO DIRECTION PARAMETERS 有权
公开(公告)号：US20220335956A1
公开(公告)日：2022-10-20
申请号：US17635593
申请日：2020-07-27
申请人： Nokia Technologies Oy
发明人： Adriana VASILACHE
IPC分类号： G10L19/008 , G10L19/035
摘要： A method for spatial audio signal encoding comprising: obtaining, for a first frame, a plurality of audio direction parameters, wherein each parameter comprises an elevation value and an azimuth value and wherein each parameter has an ordered position; determining whether, for a preceding frame, any of the plurality of audio direction parameters was differentially encoded based on a difference between the preceding frame parameter elevation value and a further preceding frame parameter elevation value and the preceding frame parameter azimuth value and a further preceding frame parameter azimuth value; generating, for any audio direction parameter which was not differentially encoded in the considered preceding frame, a differential parameter value based on a difference between the frame parameter elevation value and a preceding frame parameter elevation value and a difference between the frame parameter azimuth value and a preceding frame parameter azimuth value; generating for each of the plurality of audio direction parameters a difference parameter value based on a difference between the audio direction parameter and a rotated derived audio direction parameter; quantizing the difference between the audio direction parameter and a rotated derived audio direction parameter and the differential parameter value; and selecting for each of the plurality of audio direction parameters, either of the quantized difference or differential parameter value.

5. 发明申请

US20220293115A1 DECODING AUDIO BITSTREAMS WITH ENHANCED SPECTRAL BAND REPLICATION METADATA IN AT LEAST ONE FILL ELEMENT 有权
公开(公告)号：US20220293115A1
公开(公告)日：2022-09-15
申请号：US17831080
申请日：2022-06-02
申请人： DOLBY INTERNATIONAL AB
发明人： Lars Villemoes , Heiko Purnhagen , Per Ekstrand
IPC分类号： G10L19/16 , G10L19/035 , G10L19/24 , G10L21/038
摘要： Embodiments relate to an audio processing unit that includes a buffer, bitstream payload deformatter, and a decoding subsystem. The buffer stores at least one block of an encoded audio bitstream. The block includes a fill element that begins with an identifier followed by fill data. The fill data includes at least one flag identifying whether enhanced spectral band replication (eSBR) processing is to be performed on audio content of the block. A corresponding method for decoding an encoded audio bitstream is also provided.

6. 发明申请

US20220279299A1 QUANTIZATION OF SPATIAL AUDIO DIRECTION PARAMETERS 有权
公开(公告)号：US20220279299A1
公开(公告)日：2022-09-01
申请号：US17628792
申请日：2020-06-15
申请人： Nokia Technologies Oy
发明人： Adriana VASILACHE
IPC分类号： H04S7/00 , G10L19/035 , G10L19/008 , H04S3/00
摘要： There is disclosed inter alia an apparatus for spatial audio signal encoding configured to derive for each of a plurality of audio direction parameters a corresponding derived audio direction parameter comprising an elevation value and an azimuth value. Each derived audio direction parameter is rotated by the azimuth value of an audio direction parameter in the first position of the plurality of audio direction parameters. The position of some of the audio direction parameters are changed followed by determining for each of the plurality audio direction parameters a difference between each audio direction parameter and a corresponding rotated derived audio direction parameter. The difference for each of the plurality of audio direction parameters is then quantised.

7. 发明授权

US11355129B2 Energy lossless-encoding method and apparatus, audio encoding method and apparatus, energy lossless-decoding method and apparatus, and audio decoding method and apparatus 有权
公开(公告)号：US11355129B2
公开(公告)日：2022-06-07
申请号：US17111893
申请日：2020-12-04
申请人： SAMSUNG ELECTRONICS CO., LTD.
发明人： Ki-hyun Choo , Eun-mi Oh
IPC分类号： G10L19/00 , G10L19/032 , G10L21/00 , G10L19/035 , G10L19/02
摘要： A lossless encoding method is provided that includes determining a lossless encoding mode of a quantization coefficient as one of an infinite-range lossless encoding mode and a finite-range lossless encoding mode; encoding the quantization coefficient in the infinite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination; and encoding the quantization coefficient in the finite-range lossless encoding mode in correspondence with a result of the lossless encoding mode determination.

8. 发明申请

US20220130402A1 ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, DECODING METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM 有权
公开(公告)号：US20220130402A1
公开(公告)日：2022-04-28
申请号：US17573360
申请日：2022-01-11
申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
发明人： Srikanth Nagisetty , Zong Xian Liu , Hiroyuki Ehara
IPC分类号： G10L19/02 , G10L19/028 , G10L19/035
摘要： An encoding device according to the disclosure includes a first encoder, which in operation, encodes a low-band signal from a voice or audio input signal to generate a first encoded signal; a decoder, which in operation, decodes the first encoded signal to generate a low-band decoded signal; a second encoder, which in operation, encodes, on the basis of the low-band decoded signal, a high-band signal comprising a band from the voice or audio input signal, the band being higher than that of the low-band signal to generate a high-band encoded signal; an energy calculator, which in operation, calculates an energy of the voice or audio input signal for each subband of a plurality of subbands of the voice or audio input signal to acquire a calculated energy for each subband of the plurality of subbands of the voice or audio input signal, quantizes the calculated energy for each subband of the plurality of subbands of the voice or audio input signal to acquire a quantized band energy for each subband of the plurality of subbands of the voice or audio input signal and outputs the quantized band energy for each subband of the plurality of subbands of the voice or audio input signal; and a multiplexer, which in operation, multiplexes the quantized band energy for each subband of the plurality of subbands of the voice or audio input signal, the first encoded signal, and the high-band encoded signal to generate and output an encoded signal.

9. 发明授权

US11297533B2 Method and apparatus for audio decoding based on dequantization of quantized parameters 有权
公开(公告)号：US11297533B2
公开(公告)日：2022-04-05
申请号：US16905920
申请日：2020-06-19
申请人： DOLBY INTERNATIONAL AB
发明人： Heiko Purnhagen , Per Ekstrand
IPC分类号： H04W28/06 , H04W28/02 , G10L19/008 , G10L19/035 , G10L19/038 , H04S1/00
摘要： The present disclosure provides methods, devices and computer program products for non-uniform quantization of parameters. The disclosure further relates to a method and apparatus for reconstructing an audio object in an audio decoding system taking the non-uniformly quantized parameters into account. According to the disclosure, such an approach renders it possible to reduce bit consumption without substantially reducing the quality of the reconstructed audio object.

10. 发明授权

US11074919B2 Encoding method, decoding method, encoder, decoder, program, and recording medium 有权
公开(公告)号：US11074919B2
公开(公告)日：2021-07-27
申请号：US16687176
申请日：2019-11-18
申请人： Nippon Telegraph and Telephone Corporation
发明人： Takehiro Moriya , Noboru Harada , Yutaka Kamamoto , Yusuke Hiwasaki , Masahiro Fukui
IPC分类号： G10L19/02 , G10L19/008 , G10L19/24 , G10L19/16 , G10L21/038 , G10L19/005 , G10L19/032 , G10L19/00 , G10L19/035 , G10L19/038
摘要： In encoding, a frequency-domain sample sequence derived from an acoustic signal is divided by a weighted envelope and is then divided by a gain, the result obtained is quantized, and each sample is variable-length encoded. The error between the sample before quantization and the sample after quantization is quantized with information saved in this variable-length encoding. This quantization is performed under a rule that specifies, according to the number of saved bits, samples whose errors are to be quantized. In decoding, variable-length codes in an input sequence of codes are decoded to obtain a frequency-domain sample sequence; an error signal is further decoded under a rule that depends on the number of bits of the variable-length codes; and from the obtained sample sequence, the original sample sequence is obtained according to supplementary information.

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