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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：US20190035408A1
公开(公告)日：2019-01-31
申请号：US16145469
申请日：2018-09-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/005 , G10L21/0388 , G10L19/02 , G10L21/0232
Abstract: Embodiments of the present disclosure provide a decoding method and a decoding apparatus. The decoding method includes: in a case in which it is determined that a current frame is a lost frame, synthesizing a high frequency band signal; determining subframe gains of multiple subframes of the current frame; determining a global gain of the current frame; and adjusting, according to the global gain and the subframe gains of the multiple subframes, the synthesized high frequency band signal to obtain a high frequency band signal of the current frame. A subframe gain of the current frame is obtained according to a gradient between subframe gains of subframes previous to the current frame, so that transition before and after frame loss is more continuous, thereby reducing noise during signal reconstruction, and improving speech quality.
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公开(公告)号：US10056089B2
公开(公告)日：2018-08-21
申请号：US15408442
申请日：2017-01-18
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: performing a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current audio frame; obtaining one or more reference coding parameters of the current frame; and determining whether the reference coding parameters satisfy a set of parameter conditions. If any one of the parameter conditions is satisfied, the spectral coefficients of the current frame are encoded by using a transform coded excitation (TCX) algorithm. If none of the parameter conditions is satisfied, the spectral coefficients of the current audio frame are encoded using a high quality transform coding (HQ) 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：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.
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公开(公告)号：US20170372713A1
公开(公告)日：2017-12-28
申请号：US15677324
申请日：2017-08-15
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 application can improve an encoding and/or decoding effect.
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Patent Agency Ranking
公开(公告)号：US20170352359A1
公开(公告)日：2017-12-07
申请号：US15684079
申请日：2017-08-23
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
CPC classification number: G10L19/167 , G10L19/002 , G10L19/0204 , G10L19/06 , G10L19/26 , H04L5/06 , H04L27/2602
Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.
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公开(公告)号：US20170346954A1
公开(公告)日：2017-11-30
申请号：US15596260
申请日：2017-05-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Bin WANG , Bingyin Xia , Zexin Liu , Lei Miao
CPC classification number: H04M11/06 , G10L19/167 , G10L19/173 , G10L19/24 , G10L21/038 , H04M7/006 , H04N7/15
Abstract: Present disclosure disclose a voice signal processing method, includes: receiving a first voice coded signal from a first terminal; performing voice decoding processing on the first voice coded signal to obtain a voice decoding parameter and a first voice decoded signal; performing, by using the voice decoding parameter, virtual bandwidth extension processing to obtain a bandwidth extension voice decoded signal corresponding to the first voice decoded signal; after combining the first voice decoded signal and the bandwidth extension voice decoded signal, performing voice coding processing to obtain a second voice coded signal; and sending the second voice coded signal to a second terminal that establishes a call connection to the first terminal, where a maximum frequency bandwidth supported by the first terminal is less than a maximum frequency bandwidth supported by the second terminal. Thus, Service quality of terminals that have asymmetric maximum frequency bandwidth support capabilities can be improved.
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公开(公告)号：US09805732B2
公开(公告)日：2017-10-31
申请号：US14981923
申请日：2015-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/00 , 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：US09779747B2
公开(公告)日：2017-10-03
申请号：US15391339
申请日：2016-12-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
CPC classification number: G10L19/12 , G10L19/0204 , G10L19/0208 , G10L19/26
Abstract: Embodiments of the present invention 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：US20170178633A1
公开(公告)日：2017-06-22
申请号：US15451866
申请日：2017-03-07
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/028 , G10L19/02
CPC classification number: G10L19/002 , G10L19/0204 , 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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