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公开(公告)号：US10152981B2
公开(公告)日：2018-12-11
申请号：US14984703
申请日：2015-12-30
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/02 , G10L19/002 , G10L19/032
Abstract: Embodiments of the present disclosure provide signal encoding and decoding methods and devices. The method includes: determining, a quantity k of subbands to be encoded, where i is a positive number, and k is a positive integer; selecting, according to quantized envelopes of all subbands, k subbands from all the subbands, or selecting k subbands from all subbands according to a psychoacoustic model; and performing a first-time encoding operation on spectral coefficients of the k subbands. In the embodiments of the present disclosure, the quantity k of subbands to be encoded is determined according to the quantity of available bits and the first saturation threshold, and encoding is performed on the k subbands that are selected from all the subbands, instead of on an entire frequency band, which can reduce spectrum holes of a signal obtained through decoding, and therefore, can improve auditory quality of an output signal.
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公开(公告)号：US10134402B2
公开(公告)日：2018-11-20
申请号：US15264922
申请日：2016-09-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/002 , G10L19/02 , G10L19/032
Abstract: The present disclosure provide a signal processing method and apparatus. The method includes: determining a total quantity of to-be-allocated bits corresponding to a current frame; implementing primary bit allocation on to-be-processed sub-bands; performing a primary information unit quantity determining operation for each sub-band that has undergone the primary bit allocation; selecting sub-bands for secondary bit allocation from the to-be-processed sub-bands according to at least one of a sub-band characteristic of each sub-band of the to-be-processed sub-bands or the total quantity of surplus bits; implementing secondary bit allocation on the sub-bands for secondary bit allocation; and performing a secondary information unit quantity determining operation for each sub-band of the sub-bands for secondary bit allocation.
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公开(公告)号：US10089997B2
公开(公告)日：2018-10-02
申请号：US15615810
申请日：2017-06-06
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
IPC: G10L19/20 , G10L21/038 , G10L19/04 , G10L21/02
Abstract: An audio signal decoding method includes: obtaining mode information of a high frequency band signal of an audio signal and indices of a low frequency band signal of the audio signal by parsing a received bitstream; obtaining the low frequency band signal based on the indices; predicting an excitation signal of a high frequency band signal based on the low frequency band signal; and reconstructing the high frequency band signal based on the frequency envelope and the excitation signal. A manner for obtaining the frequency envelope of the high frequency band signal when mode information indicates the high frequency band signal is a harmonic type signal is different from a manner for obtaining the frequency envelope of the high frequency band signal when the mode information indicates the high frequency band signal is not a harmonic type signal.
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公开(公告)号：US20180268832A1
公开(公告)日：2018-09-20
申请号：US15986839
申请日：2018-05-23
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
CPC classification number: G10L19/22 , G10L19/0204 , G10L19/0208 , G10L19/0212 , G10L19/12 , G10L25/18 , G10L25/21
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：US10056090B2
公开(公告)日：2018-08-21
申请号：US14562494
申请日：2014-12-05
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/26 , G10L19/18 , G10L19/22 , G10L19/012
CPC classification number: G10L19/265 , G10L19/012 , G10L19/18 , G10L19/22
Abstract: The present disclosure provides a speech/audio signal processing method based on wideband switching and a coding apparatus. The method includes: if a first wideband speech/audio signal is a harmonic signal, adjusting a determining condition for determining that a second wideband speech/audio signal is a harmonic signal, to obtain a first determining condition, where the first wideband speech/audio signal is a signal before wideband switching, and the second wideband speech/audio signal is a signal after the wideband switching; and determining, according to the first determining condition, whether the second wideband speech/audio signal is a harmonic signal. In the case of wideband switching, signal types of speech/audio signals remain as consistent as possible before and after the switching, so that continuity of the speech/audio signal decoded by a decoder device is ensured as much as possible, further improving speech communication service quality.
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Patent Agency Ranking
公开(公告)号：US10013987B2
公开(公告)日：2018-07-03
申请号：US15616188
申请日：2017-06-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/083 , G10L19/02
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：US20180130481A1
公开(公告)日：2018-05-10
申请号：US15864147
申请日：2018-01-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
Abstract: In an audio signal decoding method, a decoded frequency domain signal of a current frame of the audio signal is obtained by decoding a received bitstream; a predicted frequency domain signal of the current frame is obtained according to the decoded frequency domain signal the current frame when the decoded frequency domain signal meets anyone of two given conditions; and a time domain signal of the current frame is obtained according to the decoded frequency domain signal and the predicted frequency domain signal.
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公开(公告)号：US20180122393A1
公开(公告)日：2018-05-03
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
CPC classification number: G10L19/12 , G10L19/02 , G10L19/08 , G10L21/038
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：US20180075853A1
公开(公告)日：2018-03-15
申请号：US15817296
申请日：2017-11-20
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/083 , G10L21/038 , G10L19/02 , G10L25/93 , G10L21/0388 , G10L19/005 , G10L19/24
CPC classification number: G10L19/083 , G10L19/005 , G10L19/0204 , G10L19/24 , G10L21/038 , G10L21/0388 , G10L25/93 , G10L2025/932
Abstract: A method for recovering a lost frame in a received audio signal includes: obtaining an initial high-frequency band signal of a current lost frame in the received audio signal; calculating a ratio R, wherein 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. The method can be used in an audio signal decoding process for low-loss recovery of lost frames of the audio signal.
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公开(公告)号：US09892739B2
公开(公告)日：2018-02-13
申请号：US14952902
申请日：2015-11-25
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/002 , G10L19/08 , G10L21/038 , G10L19/02 , G10L19/06 , G10L19/107 , G10L19/24
CPC classification number: G10L19/0204 , G10L19/002 , G10L19/06 , G10L19/08 , G10L19/107 , G10L19/24 , G10L21/038
Abstract: Embodiments of the present invention provide a signal decoding method and device. 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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