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公开(公告)号：US10546592B2
公开(公告)日：2020-01-28
申请号：US15981645
申请日：2018-05-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Fengyan Qi , Zexin Liu , Lei Miao
IPC: G10L19/002 , G10L19/032 , G10L19/028 , G10L19/02
Abstract: A audio signal encoding method includes: dividing a frequency band of an audio signal into a plurality of sub-bands, and quantifying a sub-band normalization factor of each sub-band; determining signal bandwidth of bit allocation according to the quantified sub-band normalization factor, or according to the quantified sub-band normalization factor and bit rate information; allocating bits for a sub-band within the determined signal bandwidth; and coding a spectrum coefficient of the audio signal according to the bits allocated for each sub-band. According to embodiments of the present disclosure, during coding and decoding, signal bandwidth of bit allocation is determined according to the quantified sub-band normalization factor and bit rate information. In this manner, the determined signal bandwidth is effectively coded and decoded by centralizing the bits, and audio quality is improved.
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公开(公告)号：US20200027468A1
公开(公告)日：2020-01-23
申请号：US16588064
申请日：2019-09-30
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/12 , G10L19/06 , G10L19/025
Abstract: A method comprises determining a first modification weight according to linear spectral frequency (LSF) differences of the current frame and LSF differences of a previous frame of the current frame, when a signal characteristic of the current frame meets a preset modification condition, modifying the linear predictive parameter of the current frame according to the determined first modification weight, and coding the current frame according to the modified linear predictive parameter.
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213.发明申请公开(公告)号：US20190355378A1
公开(公告)日：2019-11-21
申请号：US16531116
申请日：2019-08-04
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/0388 , G10L19/26 , G10L19/08 , G10L21/038
Abstract: This application provides an audio signal encoding and decoding method. An audio signal encoder encodes a low frequency band signal of a received audio signal, to obtain one or more low frequency encoding parameters. A voiced factor is determined according to the one or more low frequency encoding parameters. The encoder obtains a high frequency band excitation signal according to the one or more low frequency encoding parameters and the voiced factor. The encoder further obtains a synthesized excitation signal according to the high frequency band excitation signal and the voiced factor, and a high frequency encoding parameter according to the synthesized excitation signal and a high frequency band signal of the received audio signal. The encoder outputs a bitstream that includes the high frequency encoding parameter and the one or more low frequency encoding parameters. An audio signal decoder obtains the audio signal from the bitstream through reversed steps.
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公开(公告)号：US20190333528A1
公开(公告)日：2019-10-31
申请号：US16419777
申请日：2019-05-22
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Abstract: Embodiments of the present application provide a coding/decoding method, apparatus, and system. According to the coding method, de-emphasis processing is performed on a full band signal by using a de-emphasis parameter determined according to a characteristic factor of an input audio signal, and then the full band signal is coded and sent to a decoder, so that the decoder performs corresponding de-emphasis decoding processing on the full band signal according to the characteristic factor of the input audio signal and restores the input audio signal. This resolves a prior-art problem that an audio signal restored by a decoder is apt to have signal distortion, and implements adaptive de-emphasis processing on the full band signal according to the characteristic factor of the audio signal to enhance coding performance, so that the input audio signal restored by the decoder has relatively high fidelity and is closer to an original signal.
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公开(公告)号：US10347257B2
公开(公告)日：2019-07-09
申请号：US15650714
申请日：2017-07-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/002 , G10L19/02 , G10L19/035
Abstract: Present disclosure provide an audio signal encoding method and encoder, which relate to the communications field and can perform proper bit allocation for spectral coefficients of an audio signal. The method includes: splitting spectral coefficients of a current frame into subbands, acquiring quantized energy envelopes of the subbands; adjusting quantized energy envelopes values of some subbands; perform bit allocation according to adjusted quantized energy envelopes of the some subbands; quantizing a spectral coefficient of a subband to which at least one bit is allocated after the bit allocation.
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Patent Agency Ranking
公开(公告)号：US10339944B2
公开(公告)日：2019-07-02
申请号：US15596078
申请日：2017-05-16
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L21/00 , G10L19/00 , G10L21/04 , G10L19/12 , G10L19/06 , G10L19/08 , G10L19/24 , G10L21/038 , G10L19/02
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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公开(公告)号：US10311885B2
公开(公告)日：2019-06-04
申请号：US15817296
申请日：2017-11-20
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/02 , G10L19/24 , G10L25/93 , G10L19/005 , G10L19/083 , G10L21/038 , G10L21/0388
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：US20190164562A1
公开(公告)日：2019-05-30
申请号：US16263837
申请日：2019-01-31
Applicant: Huawei Technologies Co., Ltd.
Abstract: An audio encoding method and a related apparatus, where the audio coding method includes obtaining an audio signal, obtaining some subband parameters of a current frame of the audio signal, and encoding the current frame using a high quality transform coding (HQ) algorithm based on the obtained subband parameters. 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：US20190096411A1
公开(公告)日：2019-03-28
申请号：US16201681
申请日：2018-11-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Haiting Li , Zexin Liu , Lei Miao
IPC: G10L19/008
Abstract: An inter-channel phase difference (IPD) parameter extraction method and apparatus, where the extraction method includes obtaining a parameter obtaining an information extraction manner for a current frame of a multi-channel signal, obtaining an IPD parameter extraction manner for the current frame based on the parameter obtaining the information extraction manner, where the obtained IPD parameter extraction manner is one of at least two preset IPD parameter extraction manners, and obtaining an IPD parameter of the current frame based on the obtained IPD parameter extraction manner for the current frame.
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公开(公告)号：US10186272B2
公开(公告)日：2019-01-22
申请号：US15481306
申请日：2017-04-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/038 , G10L19/07 , G10L21/0388 , G10L19/087 , G10L19/12 , G10L25/90 , G10L19/00
Abstract: The present invention provides a bandwidth extension method and apparatus. The method includes: acquiring a bandwidth extension parameter, where the bandwidth extension parameter includes one or more of the following parameters: a linear predictive coefficient (LPC), a line spectral frequency (LSF) parameter, a pitch period, a decoding rate, an adaptive codebook contribution, and an algebraic codebook contribution; and performing, according to the bandwidth extension parameter, bandwidth extension on a decoded low frequency band signal, to obtain a high frequency band signal. The high frequency band signal recovered by using the bandwidth extension method and apparatus in the embodiments of the present invention is close to an original high frequency band signal, and the quality is satisfactory.
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