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公开(公告)号：US10210880B2
公开(公告)日：2019-02-19
申请号：US15677324
申请日：2017-08-15
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Abstract: An encoding method, a decoding method, an encoding apparatus, a decoding apparatus, a transmitter, a receiver, and a communications system. The encoding method includes: dividing a to-be-encoded time-domain signal into a low band signal and a high band signal; performing encoding on the low band signal to obtain a low frequency encoding parameter; performing encoding on the high band signal to obtain a high frequency encoding parameter, and obtaining a synthesized high band signal; performing short-time post-filtering processing on the synthesized high band signal to obtain a short-time filtering signal; and calculating a high frequency gain based on the high band signal and the short-time filtering signal. A technical solution according to the embodiments of the present application can improve an encoding and/or decoding effect.
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公开(公告)号：US20180374488A1
公开(公告)日：2018-12-27
申请号：US16021621
申请日：2018-06-28
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/00 , G10L19/083 , G10L19/02
CPC classification number: G10L19/00 , G10L19/0204 , G10L19/083
Abstract: The present invention discloses a speech/audio signal processing method and apparatus. In an embodiment, the speech/audio signal processing method includes: when a speech/audio signal switches bandwidth, obtaining an initial high frequency signal corresponding to a current frame of speech/audio signal; obtaining a time-domain global gain parameter of the initial high frequency signal; performing weighting processing on an energy ratio and the time-domain global gain parameter, and using an obtained weighted value as a predicted global gain parameter, where the energy ratio is a ratio between energy of a historical frame of high frequency time-domain signal and energy of a current frame of initial high frequency signal; correcting the initial high frequency signal by using the predicted global gain parameter, to obtain a corrected high frequency time-domain signal; and synthesizing a current frame of narrow frequency time-domain signal and the corrected high frequency time-domain signal and outputting the synthesized signal.
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公开(公告)号：US20180330738A1
公开(公告)日：2018-11-15
申请号：US16043880
申请日：2018-07-24
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/005 , G10L21/0232 , G10L25/93 , G10L19/02
CPC classification number: G10L19/005 , G10L19/0208 , G10L21/0232 , G10L25/93 , G10L2025/937
Abstract: A method for recovering lost frame in a media bitstream, where when a frame loss event occurs, a decoder obtains a synthesized high frequency band signal of a current lost frame, and recovery information related to the current lost frame, determines a global gain gradient of the current lost frame, and determines a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame. A high frequency band signal of the current lost frame is obtained by adjusting the synthesized high frequency band signal of the current lost frame according to the global gain and a subframe gain of the current lost frame. Hence, the method enables natural and smooth transitions of the high frequency band signal between the frames, and attenuates noises in the high frequency band signal.
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公开(公告)号：US10121484B2
公开(公告)日：2018-11-06
申请号：US15635690
申请日：2017-06-28
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Xingtao Zhang , Lei Miao
Abstract: A method and an apparatus for decoding a speech/audio bitstream are disclosed, where the method for decoding a speech/audio bitstream includes determining whether a current frame is a normal decoding frame or a redundancy decoding frame, obtaining a decoded parameter of the current frame by means of parsing when the current frame is a normal decoding frame or a redundancy decoding frame, performing post-processing on the decoded parameter of the current frame to obtain a post-processed decoded parameter of the current frame, and using the post-processed decoded parameter of the current frame to reconstruct a speech/audio signal.
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165.发明授权公开(公告)号：US10068578B2
公开(公告)日：2018-09-04
申请号：US14981956
申请日：2015-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/005 , G10L19/02 , G10L21/0232 , G10L25/93
Abstract: A method for recovering lost frame in a media bitstream is provided. When a frame loss event occurs, a decoder obtains a synthesized high frequency band signal of a current lost frame, and recovery information related to the current lost frame. The decoder determines a global gain gradient of the current lost frame, and further determines a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame. A high frequency band signal of the current lost frame is obtained by adjusting the synthesized high frequency band signal of the current lost frame according to the global gain and a subframe gain of the current lost frame. The process enables natural and smooth transitions of the high frequency band signal between the frames, and attenuates noises in the high frequency band signal.
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Patent Agency Ranking
166.发明申请公开(公告)号：US20180166085A1
公开(公告)日：2018-06-14
申请号：US15894517
申请日：2018-02-12
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/02 , G10L19/08 , G10L19/06 , G10L19/002 , G10L21/038
Abstract: A signal decoding method and device, where the method includes decoding a bit stream of a voice signal or an audio signal to acquire a decoded signal, predicting an excitation signal of an extension band according to the decoded signal, where the extension band is adjacent to a band of the decoded signal, and the band of the decoded signal is lower than the extension band; selecting a first band and a second band from the decoded signal, and predicting a spectral envelope of the extension band according to a spectral coefficient of the first band and a spectral coefficient of the second band; and determining a frequency-domain signal of the extension band according to the spectral envelope of the extension band and the excitation signal of the extension band.
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公开(公告)号：US09978383B2
公开(公告)日：2018-05-22
申请号：US15369396
申请日：2016-12-05
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/028 , G10L21/02 , G10L19/16 , G10L21/0316 , G10L21/038 , G10L19/26
CPC classification number: G10L19/028 , G10L19/167 , G10L19/26 , G10L21/02 , G10L21/0316 , G10L21/038
Abstract: Method and apparatus are provided for reconstructing a noise component of a speech/audio signal. A bitstream, is received and decoded to obtain a speech/audio signal. A first speech/audio signal is determined according to the speech/audio signal. 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 is determined. An adaptive normalization length and an adjusted amplitude value of each sample value are determined according to the adaptive normalization length and the amplitude value of each sample value. A second speech/audio signal is determined according to the symbol of each sample value and the adjusted amplitude value of each sample value.
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公开(公告)号：US20180040326A1
公开(公告)日：2018-02-08
申请号：US15787563
申请日：2017-10-18
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/02 , G10L19/028
CPC classification number: G10L19/002 , G10L19/0204 , G10L19/028
Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.
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169.发明申请公开(公告)号：US20180018989A1
公开(公告)日：2018-01-18
申请号：US15717952
申请日：2017-09-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/0388 , G10L19/26 , G10L19/08
CPC classification number: G10L21/0388 , G10L19/0204 , G10L19/08 , G10L19/24 , G10L19/265 , G10L21/038 , G10L25/93
Abstract: An audio signal encoding and decoding method, an audio signal encoding and decoding apparatus, a transmitter, a receiver, and a communications system, which can improve encoding and/or decoding performance. The audio signal encoding method includes dividing a to-be-encoded time domain signal into a low band signal and a high band signal; encoding the low band signal to obtain a low frequency encoding parameter; calculating a voiced degree factor, and predicting a high band excitation signal; weighting the high band excitation signal and random noise using the voiced degree factor, so as to obtain a synthesized excitation signal; and obtaining a high frequency encoding parameter based on the synthesized excitation signal and the high band signal. Technical solutions in the embodiments of the present invention can improve an encoding or decoding effect.
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公开(公告)号：US09830914B2
公开(公告)日：2017-11-28
申请号：US15451866
申请日：2017-03-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/02 , G10L19/028
CPC classification number: G10L19/002 , G10L19/0204 , G10L19/028
Abstract: A method and device for decoding a signal. The method for decoding a signal includes: obtaining spectral coefficients of sub-bands from a received bitstream by means of decoding; classifying sub-bands in which the spectral coefficients are located into a sub-band with saturated bit allocation and a sub-band with unsaturated bit allocation; performing noise filling on a spectral coefficient that has not been obtained by means of decoding and is in the sub-band with unsaturated bit allocation, so as to restore the spectral coefficient that has not been obtained by means of decoding; and obtaining a frequency domain signal according to the spectral coefficients obtained by means of decoding and the restored spectral coefficient. Therefore, a sub-band with unsaturated bit allocation in a frequency domain signal may be obtained by classification, thereby improving signal decoding quality.
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