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公开(公告)号：US20240046938A1
公开(公告)日：2024-02-08
申请号：US18489875
申请日：2023-10-19
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/028 , G10L19/02 , G10L19/005
CPC classification number: G10L19/002 , G10L19/028 , G10L19/0204 , G10L19/005
Abstract: In a method to decode signals, a computing device decodes spectral coefficients of a current frame are grouped into a plurality of sub-bands. The computing device classifies a sub-band as a bit allocation unsaturated sub-band based on an average quantity of allocated bits per spectral coefficient of a sub-band of the plurality of sub-bands and a threshold. The computing device obtains a noise filling gain based on an envelope of the sub-band, and obtains a reconstructed spectral coefficient of the sub-band by performing noise filling based on the noise filling gain. The computing device then obtains a frequency domain audio signal based on spectral coefficients in the sub-band obtained by decoding and the reconstructed spectral coefficient.
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公开(公告)号：US11741980B2
公开(公告)日：2023-08-29
申请号：US17232807
申请日：2021-04-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Lei Miao
IPC: G10L21/013 , G10L25/00 , G10L19/00 , G10L21/028 , G10L25/90
CPC classification number: G10L21/013 , G10L19/00 , G10L21/028 , G10L25/00 , G10L25/90
Abstract: A method and an apparatus for detecting correctness of a pitch period, where the method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal, determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal, and determining correctness of the initial pitch period according to the pitch period correctness decision parameter.
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公开(公告)号：US11270716B2
公开(公告)日：2022-03-08
申请号：US16668956
申请日：2019-10-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yang Gao , Fengyan Qi
Abstract: A system and method are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation.
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公开(公告)号：US20210335377A1
公开(公告)日：2021-10-28
申请号：US17232807
申请日：2021-04-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Lei Miao
IPC: G10L21/013 , G10L25/00 , G10L19/00 , G10L21/028 , G10L25/90
Abstract: A method and an apparatus for detecting correctness of a pitch period, where the method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal, determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal, and determining correctness of the initial pitch period according to the pitch period correctness decision parameter.
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公开(公告)号：US10984813B2
公开(公告)日：2021-04-20
申请号：US16277739
申请日：2019-02-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Lei Miao
IPC: G10L21/013 , G10L25/00 , G10L19/00 , G10L21/028 , G10L25/90
Abstract: A method and an apparatus for detecting correctness of a pitch period, where the method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal, determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal, and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. Hence, the method and apparatus for detecting correctness of the pitch period improve, based on a relatively less complex algorithm, accuracy of detecting correctness of the pitch period.
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公开(公告)号：US10482892B2
公开(公告)日：2019-11-19
申请号：US15662302
申请日：2017-07-28
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Yang Gao , Fengyan Qi
Abstract: System and method embodiments are provided for very short pitch detection and coding for speech or audio signals. The system and method include detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in time domain and detecting a lack of low frequency energy in the speech or audio signal in frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.
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公开(公告)号：US20190156839A1
公开(公告)日：2019-05-23
申请号：US16256421
申请日：2019-01-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/028 , G10L19/02
Abstract: A method and device for decoding a signal, where the method for decoding the signal includes obtaining spectral coefficients of sub-bands from a received bitstream by 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 decoding and is in the sub-band with unsaturated bit allocation to restore the spectral coefficient that has not been obtained by decoding, and obtaining a frequency domain signal according to the spectral coefficients obtained by 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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公开(公告)号：US10236002B2
公开(公告)日：2019-03-19
申请号：US15787563
申请日：2017-10-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/02 , G10L19/002 , 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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公开(公告)号：US10089995B2
公开(公告)日：2018-10-02
申请号：US15854130
申请日：2017-12-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Fuwei Ma , Dejun Zhang , Lei Miao , Fengyan Qi
IPC: G10L19/00 , G10L21/00 , G10L19/038 , G10L19/107 , G10L19/04 , G10L19/12 , G01L19/12
Abstract: A vector joint encoding/decoding method and a vector joint encoder/decoder are provided, more than two vectors are jointly encoded, and an encoding index of at least one vector is split and then combined between different vectors, so that encoding idle spaces of different vectors can be recombined, thereby facilitating saving of encoding bits, and because an encoding index of a vector is split and then shorter split indexes are recombined, thereby facilitating reduction of requirements for the bit width of operating parts in encoding/decoding calculation.
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公开(公告)号：US09972326B2
公开(公告)日：2018-05-15
申请号：US15354641
申请日：2016-11-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Zexin Liu , Lei Miao
IPC: G10L19/02 , G10L19/002 , G10L19/035 , G10L19/032
CPC classification number: G10L19/002 , G10L19/0204 , G10L19/032 , G10L19/035
Abstract: A method and an apparatus for allocating bits of an audio signal. The method includes dividing a frequency band of an audio signal into multiple sub-bands, and quantizing a sub-band normalization factor of each sub-band; classifying the multiple sub-bands into multiple groups, and acquiring a sum of intra-group sub-band normalization factors of each group; performing initial inter-group bit allocation to determine the initial number of bits of each group; performing secondary inter-group bit allocation to allocate coding bits of the audio signal to at least one group; and allocating the bits of the audio signal to sub-bands in the group. The present disclosure can, by means of grouping, ensure relatively stable allocation in a previous frame and a next frame and reduce an impact of global allocation on local discontinuity in a case of low and medium bit rates.
