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1. 发明公开

EP4365894A3 MULTI-CHANNEL SIGNAL ENCODING METHOD, MULTI-CHANNEL SIGNAL DECODING METHOD, ENCODER, AND DECODER 审中-实审转让
公开(公告)号：EP4365894A3
公开(公告)日：2024-07-17
申请号：EP23218410.1
申请日：2018-03-01
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Zexin , MIAO, Lei
IPC分类号： H03M7/30 , H04S7/00 , G10L19/008
CPC分类号： H03M7/30 , H04S7/00 , G10L19/008 , H03M7/3059 , H03M7/6047
摘要： A multi-channel signal encoding method, a multi-channel signal decoding method, an encoder, and a decoder are provided. The encoding method includes: determining a downmixed signal of a first channel signal and a second channel signal in a multi-channel signal, and reverberation gain parameters corresponding to different subbands of the first channel signal and the second channel signal (310); determining a target reverberation gain parameter that needs to be encoded in the reverberation gain parameters corresponding to the different subbands of the first channel signal and the second channel signal (320); generating parameter indication information, where the parameter indication information is used to indicate a subband corresponding to the target reverberation gain parameter (330); and encoding the target reverberation gain parameter, the parameter indication information, and the downmixed signal to generate a bitstream (340). Encoding efficiency can be improved.

2. 发明公开

EP4390920A2 INTER-CHANNEL PHASE DIFFERENCE PARAMETER ENCODING METHOD AND APPARATUS 审中-实审
公开(公告)号：EP4390920A2
公开(公告)日：2024-06-26
申请号：EP24156328.7
申请日：2018-05-05
申请人： Huawei Technologies Co., Ltd.
发明人： ZHANG, Xingtao , LI, Haiting , LIU, Zexin , MIAO, Lei
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： This application discloses an inter-channel phase difference parameter encoding method, including: obtaining a reference parameter used to determine an inter-channel phase difference IPD parameter encoding scheme of a current frame of a multi-channel signal; determining the IPD parameter encoding scheme of the current frame based on the reference parameter, where the determined IPD parameter encoding scheme of the current frame is one of at least two preset IPD parameter encoding schemes; and processing an IPD parameter of the current frame based on the determined IPD parameter encoding scheme of the current frame. The technical solutions provided in this application can improve encoding quality of the multi-channel signal.

3. 发明公开

EP4365894A2 MULTI-CHANNEL SIGNAL ENCODING METHOD, MULTI-CHANNEL SIGNAL DECODING METHOD, ENCODER, AND DECODER 审中-实审转让
公开(公告)号：EP4365894A2
公开(公告)日：2024-05-08
申请号：EP23218410.1
申请日：2018-03-01
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Zexin , MIAO, Lei
IPC分类号： G10L19/008
CPC分类号： H03M7/30 , H04S7/00 , G10L19/008 , H03M7/3059 , H03M7/6047
摘要： A multi-channel signal encoding method, a multi-channel signal decoding method, an encoder, and a decoder are provided. The encoding method includes: determining a downmixed signal of a first channel signal and a second channel signal in a multi-channel signal, and reverberation gain parameters corresponding to different subbands of the first channel signal and the second channel signal (310); determining a target reverberation gain parameter that needs to be encoded in the reverberation gain parameters corresponding to the different subbands of the first channel signal and the second channel signal (320); generating parameter indication information, where the parameter indication information is used to indicate a subband corresponding to the target reverberation gain parameter (330); and encoding the target reverberation gain parameter, the parameter indication information, and the downmixed signal to generate a bitstream (340). Encoding efficiency can be improved.

4. 发明公开

EP4339946A2 METHOD AND APPARATUS FOR PREDICTING HIGH FREQUENCY EXCITATION SIGNAL 审中-实审
公开(公告)号：EP4339946A2
公开(公告)日：2024-03-20
申请号：EP23208114.1
申请日：2014-04-03
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Zexin , MIAO, Lei
IPC分类号： G10L21/038
摘要： A method and an apparatus for predicting a high frequency excitation signal are disclosed. The method includes: acquiring, according to a received low frequency bitstream, a set of spectral frequency parameters that are arranged in an order of frequencies, where the spectral frequency parameters include low frequency LSF parameters or low frequency ISF parameters; for the set of spectral frequency parameters, calculating a spectral frequency parameter difference (102) between every two spectral frequency parameters that have a same position interval in some or all of the spectral frequency parameters; acquiring a minimum spectral frequency parameter difference (103) from the calculated spectral frequency parameter differences; determining, according to a frequency bin that corresponds to the minimum spectral frequency parameter difference, a start frequency bin (104) for predicting a high frequency excitation signal from a low frequency; and predicting the high frequency excitation signal (105) from the low frequency according to the start frequency bin. By implementing this embodiment, a high frequency excitation signal can be better predicted, thereby improving performance of the high frequency excitation signal.

5. 发明公开

EP4336495A2 INTER-CHANNEL PHASE DIFFERENCE PARAMETER EXTRACTION METHOD AND APPARATUS 审中-实审
公开(公告)号：EP4336495A2
公开(公告)日：2024-03-13
申请号：EP23206156.4
申请日：2017-05-25
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： ZHANG, Xingtao , LI, Haiting , LIU, Zexin , MIAO, Lei
IPC分类号： G10L19/008
摘要： An inter-channel phase difference parameter extraction method and apparatus are provided. The extraction method includes: obtaining a parameter used to determine an information extraction manner for a current frame of a multi-channel signal (S101); determining an IPD parameter extraction manner for the current frame of multi-channel signal based on the parameter used to determine the information extraction manner for the current frame of the multi-channel signal (S102), where the determined IPD parameter extraction manner for the current frame of multi-channel signal is one of at least two preset IPD parameter extraction manners; and extracting an IPD parameter of the current frame of multi-channel signal based on the determined IPD parameter extraction manner for the current frame of multi-channel signal (S103). Therefore, choices of the IPD parameter extraction manner can be enriched, phase information can be better maintained, and audio coding quality can be improved.

6. 发明公开

EP4283614A3 METHOD FOR PROCESSING SPEECH/AUDIO SIGNAL AND APPARATUS 审中-实审
公开(公告)号：EP4283614A3
公开(公告)日：2024-02-21
申请号：EP23184053.9
申请日：2015-01-19
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Zexin , MIAO, Lei
IPC分类号： G10L19/26 , G10L21/0316 , G10L21/02 , G10L19/028 , G10L21/038
摘要： A method for reconstructing a noise component of a speech/audio signal and an apparatus are disclosed. The method includes: receiving a bitstream, and decoding the bitstream, to obtain a speech/audio signal (101); determining a first speech/audio signal according to the speech/audio signal (102); determining a symbol of each sample value in the first speech/audio signal and an amplitude value of each sample value in the first speech/audio signal (103); determining an adaptive normalization length (104); determining an adjusted amplitude value of each sample value according to the adaptive normalization length and the amplitude value of each sample value (105); and determining a second speech/audio signal according to the symbol of each sample value and the adjusted amplitude value of each sample value (106).

7. 发明公开

EP4287184A2 STEREO ENCODER 审中-实审
公开(公告)号：EP4287184A2
公开(公告)日：2023-12-06
申请号：EP23186300.2
申请日：2017-12-20
申请人： Huawei Technologies Co., Ltd.
发明人： WANG, Bin , LI, Haiting , MIAO, Lei
IPC分类号： G10L19/008
摘要： A stereo encoding method and a stereo encoder are provided. When stereo encoding is performed, a channel combination encoding solution of a current frame is first determined, and then a quantized channel combination ratio factor of the current frame and an encoding index of the quantized channel combination ratio factor are obtained based on the determined channel combination encoding solution, so that an obtained primary channel signal and secondary channel signal of the current frame meet a characteristic of the current frame, it is ensured that a sound image of a synthesized stereo audio signal obtained after encoding is stable, drift phenomena are reduced, and encoding quality is improved.

8. 发明公开

EP4283616A2 COMPUTER PROGRAM PRODUCT FOR ENCODING A SIGNAL 审中-实审
公开(公告)号：EP4283616A2
公开(公告)日：2023-11-29
申请号：EP23203369.6
申请日：2009-11-20
申请人： Huawei Technologies Co., Ltd.
发明人： MIAO, Lei , LIU, Zexin , CHEN, Longyin , HU, Chen , XIAO, Wei , TADDEI, Herve Marcel , ZHANG, Qing
IPC分类号： G10L21/02
摘要： Methods and apparatuses for encoding a signal and decoding a signal and a system for encoding and decoding are provided. The method for encoding a signal includes: performing a classification decision process on high frequency signals of input signals; adaptively encoding the high frequency signals according to the result of the classification decision process; and outputting a bitstream including codes of low frequency signals of the input signals, adaptive codes of the high frequency signals, and the result of the classification decision process. The classification decision process is performed on the high frequency signals, and adaptive encoding or adaptive decoding is performed according to the result of the classification decision process, so the quality of voice and audio output signals is improved.

9. 发明公开

EP4235655A2 TIME DELAY ESTIMATION METHOD AND DEVICE 审中-实审
公开(公告)号：EP4235655A2
公开(公告)日：2023-08-30
申请号：EP23162751.4
申请日：2018-06-11
申请人： Huawei Technologies Co., Ltd.
发明人： SHLOMOT, Eyal , LI, Haiting , MIAO, Lei
IPC分类号： G10L19/008 , G10L25/06
摘要： This application discloses a delay estimation method and apparatus, and belongs to the audio processing field. The method includes: determining a cross-correlation coefficient of a multi-channel signal of a current frame; determining a delay track estimation value of the current frame based on buffered inter-channel time difference information of at least one past frame; determining an adaptive window function of the current frame; performing weighting on the cross-correlation coefficient based on the delay track estimation value of the current frame and the adaptive window function of the current frame, to obtain a weighted cross-correlation coefficient; and determining an inter-channel time difference of the current frame based on the weighted cross-correlation coefficient, so as to resolve a problem that the cross-correlation coefficient is excessively smoothed or insufficiently smoothed, thereby improving accuracy of estimating an inter-channel time difference.

10. 发明公开

EP4198972A1 STEREO SIGNAL PROCESSING 有权
公开(公告)号：EP4198972A1
公开(公告)日：2023-06-21
申请号：EP22206319.0
申请日：2017-12-14
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： SHLOMOT, Eyal , LI, Haiting , MIAO, Lei
IPC分类号： G10L19/008
摘要： A stereo signal processing method and apparatus are provided, where the method includes: performing delay estimation on a stereo signal of a current frame to determine an inter-channel time difference of the current frame, where the inter-channel time difference of the current frame is a time difference between a first-channel signal of the current frame and a second-channel signal of the current frame; and if a sign of the inter-channel time difference of the current frame is different from a sign of an inter-channel time difference of a previous frame of the current frame, performing delay alignment processing on the first-channel signal of the current frame based on the inter-channel time difference of the current frame, and performing delay alignment processing on the second-channel signal of the current frame based on the inter-channel time difference of the previous frame, where the first-channel signal is a target-channel signal of the current frame, and the second-channel signal is on a same channel as a target-channel signal of the previous frame.

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