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公开(公告)号：US20180330738A1
公开(公告)日：2018-11-15
申请号：US16043880
申请日：2018-07-24
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/005 , G10L21/0232 , G10L25/93 , G10L19/02
CPC classification number: G10L19/005 , G10L19/0208 , G10L21/0232 , G10L25/93 , G10L2025/937
Abstract: A method for recovering lost frame in a media bitstream, where when a frame loss event occurs, a decoder obtains a synthesized high frequency band signal of a current lost frame, and recovery information related to the current lost frame, determines a global gain gradient of the current lost frame, and determines a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame. A high frequency band signal of the current lost frame is obtained by adjusting the synthesized high frequency band signal of the current lost frame according to the global gain and a subframe gain of the current lost frame. Hence, the method enables natural and smooth transitions of the high frequency band signal between the frames, and attenuates noises in the high frequency band signal.
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公开(公告)号：US10121484B2
公开(公告)日：2018-11-06
申请号：US15635690
申请日：2017-06-28
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Xingtao Zhang , Lei Miao
Abstract: A method and an apparatus for decoding a speech/audio bitstream are disclosed, where the method for decoding a speech/audio bitstream includes determining whether a current frame is a normal decoding frame or a redundancy decoding frame, obtaining a decoded parameter of the current frame by means of parsing when the current frame is a normal decoding frame or a redundancy decoding frame, performing post-processing on the decoded parameter of the current frame to obtain a post-processed decoded parameter of the current frame, and using the post-processed decoded parameter of the current frame to reconstruct a speech/audio signal.
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153.发明授权公开(公告)号：US10068578B2
公开(公告)日：2018-09-04
申请号：US14981956
申请日：2015-12-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/005 , G10L19/02 , G10L21/0232 , G10L25/93
Abstract: A method for recovering lost frame in a media bitstream is provided. When a frame loss event occurs, a decoder obtains a synthesized high frequency band signal of a current lost frame, and recovery information related to the current lost frame. The decoder determines a global gain gradient of the current lost frame, and further determines a global gain of the current lost frame according to the global gain gradient and a global gain of each frame in previous M frames of the current lost frame. A high frequency band signal of the current lost frame is obtained by adjusting the synthesized high frequency band signal of the current lost frame according to the global gain and a subframe gain of the current lost frame. The process enables natural and smooth transitions of the high frequency band signal between the frames, and attenuates noises in the high frequency band signal.
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公开(公告)号：US10002615B2
公开(公告)日：2018-06-19
申请号：US14931975
申请日：2015-11-04
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Lei Miao
IPC: G10L19/008 , H04S3/00 , G10L19/005
CPC classification number: G10L19/008 , G10L19/005 , H04S3/008 , H04S2400/01 , H04S2420/03
Abstract: An inter-channel level difference (ICLD) processing method and apparatus are disclosed. A stereo audio signal is received, and the stereo audio signal is parsed frame by frame, to obtain an ICLD of each sub-band of each subframe of each frame of the stereo audio signal; a sum of absolute values of the ICLDs of each subframe of any frame of the stereo audio signal is calculated; and when an absolute value of a difference between the sums of the absolute values of the ICLDs of each two subframes of the any frame is less than a preset threshold, a weighted ICLD value of each sub-band of the any frame is calculated in a first weighting manner; or otherwise, a weighted ICLD value of each sub-band of the any frame is calculated in a second weighting manner.
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155.发明申请公开(公告)号：US20180166085A1
公开(公告)日：2018-06-14
申请号：US15894517
申请日：2018-02-12
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/02 , G10L19/08 , G10L19/06 , G10L19/002 , G10L21/038
Abstract: A signal decoding method and device, where 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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Patent Agency Ranking
公开(公告)号：US09978383B2
公开(公告)日：2018-05-22
申请号：US15369396
申请日：2016-12-05
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/028 , G10L21/02 , G10L19/16 , G10L21/0316 , G10L21/038 , G10L19/26
CPC classification number: G10L19/028 , G10L19/167 , G10L19/26 , G10L21/02 , G10L21/0316 , G10L21/038
Abstract: Method and apparatus are provided for reconstructing a noise component of a speech/audio signal. A bitstream, is received and decoded to obtain a speech/audio signal. A first speech/audio signal is determined according to the speech/audio signal. A symbol of each sample value in the first speech/audio signal and an amplitude value of each sample value in the first speech/audio signal is determined. An adaptive normalization length and an adjusted amplitude value of each sample value are determined according to the adaptive normalization length and the amplitude value of each sample value. A second speech/audio signal is determined according to the symbol of each sample value and the adjusted amplitude value of each sample value.
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公开(公告)号：US20180040326A1
公开(公告)日：2018-02-08
申请号：US15787563
申请日：2017-10-18
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/02 , G10L19/028
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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158.发明申请公开(公告)号：US20180018989A1
公开(公告)日：2018-01-18
申请号：US15717952
申请日：2017-09-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/0388 , G10L19/26 , G10L19/08
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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公开(公告)号：US09830914B2
公开(公告)日：2017-11-28
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 , G10L19/02 , G10L19/028
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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公开(公告)号：US20170316784A1
公开(公告)日：2017-11-02
申请号：US15650714
申请日：2017-07-14
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/002 , G10L19/035 , G10L19/02
CPC classification number: G10L19/002 , G10L19/0204 , 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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