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公开(公告)号：US20170372716A1
公开(公告)日：2017-12-28
申请号：US15699694
申请日：2017-09-08
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/12 , G10L19/06 , G10L19/025
CPC classification number: G10L19/12 , G10L19/025 , G10L19/06
Abstract: An audio coding method and apparatus, where the method includes, for each audio frame in audio, when a signal characteristic of the audio frame and a signal characteristic of a previous audio frame meet a preset modification condition, determining a first modification weight according to linear spectral frequency (LSF) differences of the audio frame and the LSF differences of the previous audio frame, modifying a linear predictive parameter of the audio frame according to the determined first modification weight, and coding the audio frame according to a modified linear predictive parameter of the audio frame. According to the present disclosure, audio having a wider bandwidth can be coded while a bit rate remains unchanged or a bit rate slightly changes and a spectrum between audio frames is steadier.
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公开(公告)号：US20170372710A1
公开(公告)日：2017-12-28
申请号：US15698107
申请日：2017-09-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Lei Miao
IPC: G10L19/008 , G10L19/022
CPC classification number: G10L19/008 , G10L19/022
Abstract: A method for determining an inter-channel time difference (ITD) parameter includes determining a reference parameter according to a time-domain signal on a first sound channel and a time-domain signal on a second sound channel, where the reference parameter corresponds to a sequence of obtaining the time-domain signal on the first sound channel and the time-domain signal on the second sound channel, determining a search range according to the reference parameter and a limiting value (Tmax), where the Tmax is determined according to a sampling rate of the time-domain signal on the first sound channel, and performing search processing within the search range based on a frequency-domain signal on the first sound channel and a frequency-domain signal on the second sound channel to determine a first ITD parameter corresponding to the first sound channel and the second sound channel.
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公开(公告)号：US09837088B2
公开(公告)日：2017-12-05
申请号：US15335449
申请日：2016-10-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/02 , G10L19/002
CPC classification number: G10L19/0204 , G10L19/002 , G10L19/02
Abstract: Present disclosure provides a signal processing method and device. Spectral coefficients of a current frame of a frequency-domain audio signal are divided into N sub-bands. N is a positive integer greater than 1. According to an energy attribute and a spectral attribute of a first subset of the N sub-bands, whether to modify original envelope values of sub-bands in the first subset is determined. A frequency range of each of the M sub-bands in the first subset is lower than a frequency range of each of the K sub-bands. Based on a determination that the original envelope values of the M sub-bands need to be modified, the original envelope values of the M sub-bands are modified individually to obtain modified envelope values of the M sub-bands. Encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands and original envelope values of the K sub-bands.
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公开(公告)号：US09812143B2
公开(公告)日：2017-11-07
申请号：US15362443
申请日：2016-11-28
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: G10L19/12 , G10L19/025 , G10L19/06
Abstract: An audio coding method and apparatus, where the method includes, for each audio frame in audio, when a signal characteristic of the audio frame and a signal characteristic of a previous audio frame meet a preset modification condition, determining a first modification weight according to linear spectral frequency (LSF) differences of the audio frame and LSF differences of the previous audio frame, modifying a linear predictive parameter of the audio frame according to the determined first modification weight, and coding the audio frame according to a modified linear predictive parameter of the audio frame. According to the present disclosure, audio having a wider bandwidth can be coded while a bit rate remains unchanged or a bit rate slightly changes and a spectrum between audio frames is steadier.
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95.发明申请公开(公告)号：US20170316789A1
公开(公告)日：2017-11-02
申请号：US15651994
申请日：2017-07-17
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Lei Miao , Anisse Taleb
IPC: G10L19/032 , H04N19/60 , G10L19/20 , G10L25/18 , G10L21/038 , G10L19/025
CPC classification number: G10L19/032 , G10L19/025 , G10L19/20 , G10L21/038 , G10L25/18 , H04N19/60
Abstract: A method and a device for encoding a high frequency signal, and a method and a device for decoding a high frequency signal are provided, which relate to encoding and decoding technology. The 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, if 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：US20170287493A1
公开(公告)日：2017-10-05
申请号：US15472730
申请日：2017-03-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Xingtao Zhang , Bin Wang , Lei Miao
IPC: G10L19/005 , G10L19/087 , G10L19/06 , G10L19/083 , G10L19/107 , G10L25/06 , G10L25/78 , G10L19/02
CPC classification number: G10L19/005 , G10L19/0208 , G10L19/06 , G10L19/083 , G10L19/087 , G10L19/09 , G10L19/107 , G10L25/06 , G10L25/78 , G10L2019/0002 , G10L2019/0008 , G10L2019/0016 , G10L2025/783
Abstract: A frame loss compensation processing method and apparatus is presented, where the method includes, when a ith frame is a lost frame, estimating a spectrum frequency parameter, a pitch period, and a gain of the ith frame according to at least one of an inter-frame relationship between first N frames of the ith frame or an intra-frame relationship between first N frames of the ith frame. A parameter of the ith frame is determined using the signal correlation between the first N frames, the signal energy stability between the first N frames, intra-frame signal correlation of each frame, and intra-frame signal energy stability of each frame.
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公开(公告)号：US09779749B2
公开(公告)日：2017-10-03
申请号：US15341451
申请日：2016-11-02
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/00 , G10L19/26 , G10L19/18 , G10L21/038 , G10L19/008 , G10L19/02 , G10L19/087 , G10L25/18
CPC classification number: G10L19/265 , G10L19/008 , G10L19/0204 , G10L19/087 , G10L19/18 , G10L21/038 , G10L25/18
Abstract: The present disclosure relates to an audio signal coding method and apparatus. The method includes categorizing audio signals into high-frequency audio signals and low-frequency audio signals, coding the low-frequency audio signals using a corresponding low-frequency coding manner according to characteristics of low-frequency audio signals, and selecting a bandwidth extension mode to code the high-frequency audio signals according to the low-frequency coding manner and/or characteristics of the audio signals.
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公开(公告)号：US09761235B2
公开(公告)日：2017-09-12
申请号：US14721606
申请日：2015-05-26
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: G10L19/03 , G10L19/0204 , G10L19/12 , G10L19/26 , G10L19/265 , G10L21/038 , G10L2019/0016
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 invention can improve an encoding and/or decoding effect.
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公开(公告)号：US20170249948A1
公开(公告)日：2017-08-31
申请号：US15596078
申请日：2017-05-16
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
CPC classification number: G10L19/12 , G10L19/0208 , G10L19/06 , G10L19/08 , G10L19/24 , G10L21/038 , G10L2019/0016
Abstract: A method and an apparatus for predicting a high band excitation signal are disclosed. The method includes: acquiring, according to a received low band bitstream, a set of spectral frequency parameters that are arranged in an order of frequencies, calculating a spectral frequency parameter difference between every two spectral frequency parameters that have a same position interval; acquiring a minimum spectral frequency parameter difference 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 for predicting a high band excitation signal from a low band; and predicting the high band excitation signal from the low band according to the start frequency bin. By implementing embodiments of the present invention, a high band excitation signal can be better predicted, thereby improving performance of the high band excitation signal.
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100.发明授权公开(公告)号：US09728197B2
公开(公告)日：2017-08-08
申请号：US14879388
申请日：2015-10-09
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Lei Miao , Anisse Taleb
IPC: G10L19/032 , G10L21/038 , G10L19/20 , H04N19/60 , G10L25/18 , G10L19/025
CPC classification number: G10L19/032 , G10L19/025 , G10L19/20 , G10L21/038 , G10L25/18 , H04N19/60
Abstract: A method and a device for encoding a high frequency signal, and a method and a device for decoding a high frequency signal are provided, which relate to encoding and decoding technology. The 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, if 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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