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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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公开(公告)号：US09881626B2
公开(公告)日：2018-01-30
申请号：US15486683
申请日：2017-04-13
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Fuwei Ma , Dejun Zhang , Lei Miao , Fengyan Qi
IPC: G10L19/00 , G10L21/00 , G10L19/038 , G10L19/107 , G10L19/12
CPC classification number: G10L19/038 , G01L19/12 , G10L19/04 , G10L19/107 , G10L19/12 , G10L21/00 , G10L2019/0005
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：US09875749B2
公开(公告)日：2018-01-23
申请号：US15146079
申请日：2016-05-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
IPC: G10L19/00 , G10L19/12 , G10L19/02 , G10L21/038 , G10L19/08
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：US20180018980A1
公开(公告)日：2018-01-18
申请号：US15715179
申请日：2017-09-26
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/038 , G10L19/06 , G10L19/00
CPC classification number: G10L19/038 , G10L19/06 , G10L2019/0005
Abstract: Embodiments of the present application proposes a frequency envelope vector quantization method and apparatus, where the method includes: dividing N frequency envelopes in one frame into N1 vectors; quantizing a first vector in the N1 vectors by using a first codebook, to obtain a code word corresponding to the quantized first vector, where the first codebook is divided into 2B1 portions; determining, according to the code word corresponding to the quantized first vector; determining a second codebook according to the codebook of the ith portion; and quantizing a second vector in the N1 vectors based on the second codebook. In the embodiments of the present application, vector quantization can be performed on frequency envelope vectors by using a codebook with a smaller quantity of bits. Therefore, complexity of vector quantization can be reduced, and an effect of vector quantization can also be ensured.
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公开(公告)号：US20180005638A1
公开(公告)日：2018-01-04
申请号：US15708617
申请日：2017-09-19
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/022 , G10L21/038 , G10L19/20 , G10L19/135 , G10L19/12 , G10L25/45 , G10L19/032
CPC classification number: G10L19/022 , G10L19/032 , G10L19/12 , G10L19/135 , G10L19/20 , G10L21/038 , G10L25/45
Abstract: A method and an apparatus for processing a temporal envelope of an audio signal, and an encoder are disclosed. When multiple temporal envelopes are solved, continuity of signal energy can be well maintained, and in addition, complexity of calculating a temporal envelope is reduced. The method includes: obtaining a high-band signal of the current frame audio signal according to the received current frame audio signal; dividing the high-band signal of the current frame signal into M subframes according to a predetermined temporal envelope quantity M, where M is an integer that is greater than or equal to 2; calculating a temporal envelope of each of the subframes; performing windowing on the first subframe of the M subframes and the last subframe of the M subframes by using an asymmetric window function; and performing windowing on a subframe except the first subframe and the last subframe of the M subframes.
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Patent Agency Ranking
公开(公告)号：US09852738B2
公开(公告)日：2017-12-26
申请号：US15385881
申请日：2016-12-21
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/005 , G10L21/038 , G10L21/0388 , G10L19/083 , G10L19/02 , G10L25/93 , G10L19/24
CPC classification number: G10L19/083 , G10L19/005 , G10L19/0204 , G10L19/24 , G10L21/038 , G10L21/0388 , G10L25/93 , G10L2025/932
Abstract: Embodiments of the present application provide a method and an apparatus for recovering a lost frame in a received audio signal. The method for recovering a lost frame includes: determining an initial high-frequency band signal of a current lost frame; determining a gain of the current lost frame; determining gain adjustment information of the current lost frame; adjusting the gain of the current lost frame according to the gain adjustment information, to obtain an adjusted gain of the current lost frame; and adjusting the initial high-band signal according to the adjusted gain, to obtain a high-frequency band signal of the current lost frame. The method and the apparatus for recovering a lost frame provided in the embodiments of the present application can be used in an audio signal decoding process for low-loss recovery of a lost frame of the audio signal, resulting in improved performance of an audio signal decoder.
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公开(公告)号：US20170352358A1
公开(公告)日：2017-12-07
申请号：US15686175
申请日：2017-08-25
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/02 , G10L19/002
CPC classification number: G10L19/0204 , G10L19/002 , G10L19/02
Abstract: Present disclosure pertains to an audio signal processing method and device. A current frame of a frequency-domain audio signal has N frequency sub-bands. According to an energy attribute and a spectral attribute of a first subset of M sub-bands, whether to adjust envelope values of the M sub-bands is determined. Based on a determination that the energy envelope values of the M sub-bands need to be adjusted, the energy 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 adjusted envelope values of the M sub-bands and energy envelope information of K sub-bands of a second subset. The first subset and the second subset have no overlap in frequency, and N=M+K.
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218.发明授权公开(公告)号：US09805736B2
公开(公告)日：2017-10-31
申请号：US14704502
申请日：2015-05-05
Applicant: Huawei Technologies Co., Ltd.
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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219.发明申请公开(公告)号：US20170270944A1
公开(公告)日：2017-09-21
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 , G10L19/04 , G10L21/038 , G10L21/02
CPC classification number: G10L19/20 , G10L19/04 , G10L21/02 , G10L21/038
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：US20170221493A1
公开(公告)日：2017-08-03
申请号：US15486683
申请日：2017-04-13
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Fuwei Ma , Dejun Zhang , Lei Miao , Fengyan Qi
IPC: G10L19/038 , G10L19/12 , G10L19/107
CPC classification number: G10L19/038 , G01L19/12 , G10L19/04 , G10L19/107 , G10L19/12 , G10L21/00 , G10L2019/0005
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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