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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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123.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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124.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：US09704500B2
公开(公告)日：2017-07-11
申请号：US14808145
申请日：2015-07-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Lei Miao , Fengyan Qi
IPC: G10L19/20 , G10L21/038 , G10L19/04 , G10L21/02
CPC classification number: G10L19/20 , G10L19/04 , G10L21/02 , G10L21/038
Abstract: A method includes obtaining a signal type of an audio signal and a low frequency band signal of the audio signal, where the audio signal includes the low frequency band signal and a high frequency band signal; obtaining a frequency envelope of the high frequency band signal according to the signal type; predicting an excitation signal of the high frequency band signal according to the low frequency band signal; and restoring the high frequency band signal according to the frequency envelope of the high frequency band signal and the excitation signal of the high frequency band signal. By using the technical solutions of the embodiments of the present invention, an error existing between a high frequency band signal obtained by prediction and an actual high frequency band signal can be effectively reduced, and an accuracy rate of the predicted high frequency band signal can be increased.
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Patent Agency Ranking
公开(公告)号：US09691396B2
公开(公告)日：2017-06-27
申请号：US14470559
申请日：2014-08-27
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/083 , G10L19/02
CPC classification number: G10L19/00 , G10L19/0204 , G10L19/083
Abstract: The present invention discloses a speech/audio signal processing method and apparatus. In an embodiment, the speech/audio signal processing method includes: when a speech/audio signal switches bandwidth, obtaining an initial high frequency signal corresponding to a current frame of speech/audio signal; obtaining a time-domain global gain parameter of the initial high frequency signal; performing weighting processing on an energy ratio and the time-domain global gain parameter, and using an obtained weighted value as a predicted global gain parameter, where the energy ratio is a ratio between energy of a historical frame of high frequency time-domain signal and energy of a current frame of initial high frequency signal; correcting the initial high frequency signal by using the predicted global gain parameter, to obtain a corrected high frequency time-domain signal; and synthesizing a current frame of narrow frequency time-domain signal and the corrected high frequency time-domain signal and outputting the synthesized signal.
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公开(公告)号：US20170103764A1
公开(公告)日：2017-04-13
申请号：US15385881
申请日：2016-12-21
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/083 , G10L19/02 , G10L25/93 , G10L19/005
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：US20170069329A1
公开(公告)日：2017-03-09
申请号：US15354641
申请日：2016-11-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Zexin Liu , Lei Miao
IPC: G10L19/002 , G10L19/032 , G10L19/02
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.
Abstract translation: 一种用于分配音频信号的位的方法和装置。 该方法包括将音频信号的频带划分成多个子带，并量化每个子带的子带归一化因子; 将多个子带分为多个组，并获取每组的组内子带归一化因子之和; 执行初始组间比特分配以确定每组的初始比特数; 执行次要组间比特分配以将音频信号的编码比特分配给至少一个组; 并将音频信号的比特分配给组中的子带。 本公开可以通过分组确保在先前帧和下一帧中的相对稳定的分配，并且在低和中比特率的情况下减少全局分配对局部不连续性的影响。
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公开(公告)号：US20160372122A1
公开(公告)日：2016-12-22
申请号：US15256018
申请日：2016-09-02
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
Inventor： Xingtao Zhang , Zexin Liu , Lei Miao
IPC: G10L19/005 , G10L19/06 , G10L19/16
CPC classification number: G10L19/005 , G10L19/06 , G10L19/167 , G10L19/26 , G10L2019/0002
Abstract: The present invention disclose a speech/audio bitstream decoding method including: acquiring a speech/audio decoding parameter of a current speech/audio frame, where the foregoing current speech/audio frame is a redundant decoded frame or a speech/audio frame previous to the foregoing current speech/audio frame is a redundant decoded frame; performing post processing on the acquired speech/audio decoding parameter according to speech/audio parameters of X speech/audio frames, where the foregoing X speech/audio frames include M speech/audio frames previous to the foregoing current speech/audio frame and/or N speech/audio frames next to the foregoing current speech/audio frame; and recovering a speech/audio signal by using the post-processed speech/audio decoding parameter of the foregoing current speech/audio frame. The technical solutions of the present invention help improve quality of an output speech/audio signal.
Abstract translation: 本发明公开了一种语音/音频比特流解码方法，包括：获取当前语音/音频帧的语音/音频解码参数，其中前述当前语音/音频帧是冗余解码帧或者之前的语音/音频帧 前述当前语音/音频帧是冗余解码帧; 对所获取的语音/音频解码参数根据X个语音/音频帧的语音/音频参数执行后处理，其中前述X个语音/音频帧包括前述当前语音/音频帧之前的M个语音/音频帧，和/或 上述当前语音/音频帧之后的N个语音/音频帧; 以及通过使用上述当前语音/音频帧的后处理语音/音频解码参数来恢复语音/音频信号。 本发明的技术方案有助于提高输出语音/音频信号的质量。
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公开(公告)号：US09424850B2
公开(公告)日：2016-08-23
申请号：US14595672
申请日：2015-01-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Fengyan Qi , Lei Miao , Zexin Liu
IPC: G10L19/002 , G10L19/02
CPC classification number: G10L19/002 , G10L19/0204
Abstract: A method and an apparatus for allocating bits in an audio signal. The method includes dividing a frequency band of an audio signal into a plurality of subbands, quantizing a subband normalization factor of each subband; and an energy attribute of an audio signal of the corresponding group; allocating coding bits to at least one group, where a sum of coding bits allocated to the at least one group is the number of coding bits of the audio signal; and allocating the coding bits allocated to the at least one group to each subband in each group of the at least one group. In a case of a low or medium bit rate, the embodiments of the present invention can, by means of grouping, ensure relatively stable allocation of previous and subsequent frames and reduce impact of global allocation on partial discontinuity.
Abstract translation: 一种用于在音频信号中分配比特的方法和装置。 该方法包括将音频信号的频带划分成多个子带，量化每个子带的子带归一化因子; 以及相应组的音频信号的能量属性; 将编码比特分配给至少一个组，其中分配给所述至少一个组的编码比特的和是所述音频信号的编码比特数; 以及将分配给所述至少一个组的编码比特分配给所述至少一个组的每个组中的每个子带。 在低或中等比特率的情况下，本发明的实施例可以通过分组来确保前一帧和后续帧的相对稳定的分配，并减少全局分配对部分不连续性的影响。
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