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公开(公告)号：US20210082445A1
公开(公告)日：2021-03-18
申请号：US17104852
申请日：2020-11-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Bin Wang , Zexin Liu , Haiting Li
Abstract: A stereo signal encoding method includes obtaining a residual signal encoding parameter of a current frame of a stereo signal based on downmixed signal energy and residual signal energy of each of M sub-bands of the current frame, where the residual signal encoding parameter indicates whether to encode residual signals of the M sub-bands, determining whether to encode the residual signals based on the residual signal encoding parameter, and encoding the residual signals when it is determined that the residual signals need to be encoded.
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公开(公告)号：US10741186B2
公开(公告)日：2020-08-11
申请号：US16145469
申请日：2018-09-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/005 , G10L19/02 , G10L21/0232 , G10L21/0388
Abstract: Embodiments of the present disclosure provide a decoding method and a decoding apparatus. The decoding method includes: in a case in which it is determined that a current frame is a lost frame, synthesizing a high frequency band signal; determining subframe gains of multiple subframes of the current frame; determining a global gain of the current frame; and adjusting, according to the global gain and the subframe gains of the multiple subframes, the synthesized high frequency band signal to obtain a high frequency band signal of the current frame. A subframe gain of the current frame is obtained according to a gradient between subframe gains of subframes previous to the current frame, so that transition before and after frame loss is more continuous, thereby reducing noise during signal reconstruction, and improving speech quality.
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公开(公告)号：US10580423B2
公开(公告)日：2020-03-03
申请号：US16201647
申请日：2018-11-27
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/00 , G10L19/022 , G10L21/038 , G10L25/45 , G10L19/135 , G10L19/20 , G10L19/032 , G10L19/12
Abstract: A method and an apparatus for processing a temporal envelope of an audio signal, and an encoder, where when multiple temporal envelopes are solved, continuity of signal energy can be well maintained, and in addition, complexity of calculating a temporal envelope is reduced. The method includes obtaining a high-band signal of the current frame audio signal according to the received current frame audio signal, dividing the high-band signal of the current frame signal into M subframes according to a predetermined temporal envelope quantity M, where M is an integer greater than or equal to two, calculating a temporal envelope of each of the subframes, performing windowing on the first subframe of the M subframes and the last subframe of the M subframes using an asymmetric window function, and performing windowing on a subframe except the first subframe and the last subframe of the M subframes.
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公开(公告)号：US10529351B2
公开(公告)日：2020-01-07
申请号：US16396253
申请日：2019-04-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/083 , G10L21/0388 , G10L21/038 , G10L19/005 , G10L19/02 , G10L25/93 , G10L19/24
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.
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155.发明申请公开(公告)号：US20190325883A1
公开(公告)日：2019-10-24
申请号：US16502410
申请日：2019-07-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Lei Miao , Anisse Taleb
IPC: G10L19/032 , G10L19/20 , H04N19/60 , G10L25/18 , G10L21/038
Abstract: A method for encoding a high frequency signal includes determining a signal type of a high frequency signal of a current frame, smoothing and scaling time envelopes of the high frequency signal of the current frame and obtaining time envelopes of the high frequency signal of the current frame that require to be encoded when the high frequency signal of the current frame is a non-transient signal and a high frequency signal of the previous frame is a transient signal, and quantizing and encoding the time envelopes of the high frequency signal of the current frame that require to be encoded, and frequency information and signal type information of the high frequency signal of the current frame.
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Patent Agency Ranking
公开(公告)号：US10388295B2
公开(公告)日：2019-08-20
申请号：US15848486
申请日：2017-12-20
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
IPC: G10L19/12 , G10L19/02 , G10L21/038 , G10L19/08
Abstract: A method for predicting a bandwidth extension frequency band signal includes demultiplexing a received bitstream to obtain a frequency domain signal; determining whether a highest frequency bin, to which a bit is allocated, of the frequency domain signal is less than a preset start frequency bin of a bandwidth extension frequency band; predicting an excitation signal of the bandwidth extension frequency band according to the determination; and predicting the bandwidth extension frequency band signal according to the predicted excitation signal of the bandwidth extension frequency band and a frequency envelope of the bandwidth extension frequency band.
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公开(公告)号：US20190189134A1
公开(公告)日：2019-06-20
申请号：US16272394
申请日：2019-02-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Haiting Li , Zexin Liu , Xingtao Zhang , Lei Miao
IPC: G10L19/008 , H04S3/00
CPC classification number: G10L19/008 , H04S3/00 , H04S2420/03
Abstract: A method for encoding a multi-channel signal and an encoder, where the encoding method includes obtaining a multi-channel signal of a current frame, determining an initial inter-channel time difference (ITD) value of the current frame, controlling, based on characteristic information of the multi-channel signal, a quantity of target frames that are allowed to appear continuously, where the characteristic information includes at least one of a signal-to-noise ratio of the multi-channel signal or a peak feature of cross correlation coefficients of the multi-channel signal, and an ITD value of a previous frame of the target frame is reused as an ITD value of the target frame, determining an ITD value of the current frame based on the initial ITD value and the quantity of target frames allowed to appear continuously, and encoding the multi-channel signal based on the ITD value of the current frame.
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公开(公告)号：US10269366B2
公开(公告)日：2019-04-23
申请号：US15986839
申请日：2018-05-23
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Abstract: An audio encoding method and a related apparatus are disclosed. The audio coding method includes: obtaining an audio signal; obtaining spectral coefficients of a current frame of the audio signal; obtaining a set of reference coding parameters of the current frame; determining whether the set of reference coding parameters satisfy a preset parameter condition; when it is determined that the reference coding parameters satisfy the preset parameter condition, encoding the spectral coefficients of the current frame using a transform coded excitation (TCX) algorithm. The audio encoding method and the related apparatus help improve encoding quality or encoding efficiency in audio signal encoding.
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公开(公告)号：US20190096415A1
公开(公告)日：2019-03-28
申请号：US16201647
申请日：2018-11-27
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/022 , G10L19/12 , G10L21/038 , G10L19/032 , G10L19/20 , G10L25/45 , G10L19/135
Abstract: A method and an apparatus for processing a temporal envelope of an audio signal, and an encoder, where when multiple temporal envelopes are solved, continuity of signal energy can be well maintained, and in addition, complexity of calculating a temporal envelope is reduced. The method includes obtaining a high-band signal of the current frame audio signal according to the received current frame audio signal, dividing the high-band signal of the current frame signal into M subframes according to a predetermined temporal envelope quantity M, where M is an integer greater than or equal to two, calculating a temporal envelope of each of the subframes, performing windowing on the first subframe of the M subframes and the last subframe of the M subframes using an asymmetric window function, and performing windowing on a subframe except the first subframe and the last subframe of the M subframes.
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公开(公告)号：US10218856B2
公开(公告)日：2019-02-26
申请号：US15596260
申请日：2017-05-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Bin Wang , Bingyin Xia , Zexin Liu , Lei Miao
IPC: G06F3/16 , G10L19/008 , H04M11/06 , G10L19/16 , H04M7/00 , H04N7/15 , G10L21/038 , G10L19/24
Abstract: Present disclosure disclose a voice signal processing method, includes: receiving a first voice coded signal from a first terminal; performing voice decoding processing on the first voice coded signal to obtain a voice decoding parameter and a first voice decoded signal; performing, by using the voice decoding parameter, virtual bandwidth extension processing to obtain a bandwidth extension voice decoded signal corresponding to the first voice decoded signal; after combining the first voice decoded signal and the bandwidth extension voice decoded signal, performing voice coding processing to obtain a second voice coded signal; and sending the second voice coded signal to a second terminal that establishes a call connection to the first terminal, where a maximum frequency bandwidth supported by the first terminal is less than a maximum frequency bandwidth supported by the second terminal. Thus, Service quality of terminals that have asymmetric maximum frequency bandwidth support capabilities can be improved.
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