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.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

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.

公开(公告)号：US20170270933A1

公开(公告)日：2017-09-21

申请号：US15616188

申请日：2017-06-07

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/00

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.

公开(公告)号：US09754594B2

公开(公告)日：2017-09-05

申请号：US15170524

申请日：2016-06-01

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L19/00 ,  G10L19/002 ,  G10L19/02 ,  G10L19/035

CPC classification number: G10L19/002 ,  G10L19/0204 ,  G10L19/035

Abstract: Present disclosure provide an encoding method and apparatus, which relate to the communications field and can perform proper quantization bit allocation for spectral coefficients of an audio signal, thereby improving quality of a signal obtained by a decoder by means of decoding. The method includes: after splitting spectral coefficients of a current data frame into subbands, acquiring quantized frequency envelope values of the subbands; modifying quantized frequency envelope values of subbands of a first quantity in the subbands; allocating quantization bits to the subbands according to modified quantized frequency envelope values of the subbands of the first quantity; quantizing a spectral coefficient of a subband to which a quantization bit is allocated in the subbands; and writing the quantized spectral coefficient of the subband to which a quantization bit is allocated into a bitstream.

公开(公告)号：US20170213564A1

公开(公告)日：2017-07-27

申请号：US15481306

申请日：2017-04-06

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Bin Wang

IPC: G10L19/087 ,  G10L21/038 ,  G10L25/90 ,  G10L19/12

CPC classification number: G10L19/087 ,  G10L19/12 ,  G10L21/038 ,  G10L25/90 ,  G10L2019/0002 ,  G10L2025/906

Abstract: The present invention provide a bandwidth extension method and apparatus. The method includes: acquiring a bandwidth extension parameter, where the bandwidth extension parameter includes one or more of the following parameters: a linear predictive coefficient (LPC), a line spectral frequency (LSF) parameter, a pitch period, a decoding rate, an adaptive codebook contribution, and an algebraic codebook contribution; and performing, according to the bandwidth extension parameter, bandwidth extension on a decoded low frequency band signal, to obtain a high frequency band signal. The high frequency band signal recovered by using the bandwidth extension method and apparatus in the embodiments of the present invention is close to an original high frequency band signal, and the quality is satisfactory.

公开(公告)号：US09666201B2

公开(公告)日：2017-05-30

申请号：US15068908

申请日：2016-03-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Bin Wang

IPC: G10L21/038 ,  G10L19/07 ,  G10L19/12 ,  G10L19/087 ,  G10L19/00

CPC classification number: G10L19/087 ,  G10L19/12 ,  G10L21/038 ,  G10L25/90 ,  G10L2019/0002 ,  G10L2025/906

Abstract: The present invention provides a bandwidth extension method and apparatus. The method includes: acquiring a bandwidth extension parameter, where the bandwidth extension parameter includes one or more of the following parameters: a linear predictive coefficient (LPC), a line spectral frequency (LSF) parameter, a pitch period, a decoding rate, an adaptive codebook contribution, and an algebraic codebook contribution; and performing, according to the bandwidth extension parameter, bandwidth extension on a decoded low-frequency signal, to obtain a high frequency band signal. The high frequency band signal recovered by using the bandwidth extension method and apparatus in the embodiments of the present invention is close to an original high frequency band signal, and the quality is satisfactory.

公开(公告)号：US20170076732A1

公开(公告)日：2017-03-16

申请号：US15362443

申请日：2016-11-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L19/12 ,  G10L19/025

CPC classification number: G10L19/12 ,  G10L19/025 ,  G10L19/06

Abstract: An audio coding method and apparatus, where the method includes, for each audio frame in audio, when a signal characteristic of the audio frame and a signal characteristic of a previous audio frame meet a preset modification condition, determining a first modification weight according to linear spectral frequency (LSF) differences of the audio frame and LSF differences of the previous audio frame, modifying a linear predictive parameter of the audio frame according to the determined first modification weight, and coding the audio frame according to a modified linear predictive parameter of the audio frame. According to the present disclosure, audio having a wider bandwidth can be coded while a bit rate remains unchanged or a bit rate slightly changes and a spectrum between audio frames is steadier.

Abstract translation: 一种音频编码方法和装置，对于音频中的每个音频帧，当音频帧的信号特征和先前的音频帧的信号特性满足预设的修改条件时，该方法包括：根据线性确定第一修改权重 根据所确定的第一修改权重修改音频帧的线性预测参数，并根据所修改的线性预测参数对音频帧进行编码，对音频帧的频谱频率（LSF）差异和先前音频帧的LSF差异进行编码， 音频帧。 根据本公开，可以在比特率保持不变或比特率稍微改变并且音频帧之间的频谱更稳定的同时对具有较宽带宽的音频进行编码。

公开(公告)号：US20170047074A1

公开(公告)日：2017-02-16

申请号：US15335449

申请日：2016-10-27

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

IPC: G10L19/02 ,  G10L19/002

CPC classification number: G10L19/0204 ,  G10L19/002 ,  G10L19/02

Abstract: Present disclosure provides a signal processing method and device. Spectral coefficients of a current frame of a frequency-domain audio signal are divided into N sub-bands. N is a positive integer greater than 1. According to an energy attribute and a spectral attribute of a first subset of the N sub-bands, whether to modify original envelope values of sub-bands in the first subset is determined. A frequency range of each of the M sub-bands in the first subset is lower than a frequency range of each of the K sub-bands. Based on a determination that the original envelope values of the M sub-bands need to be modified, the original 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 modified envelope values of the M sub-bands and original envelope values of the K sub-bands.

Abstract translation: 本公开提供了一种信号处理方法和装置。 频域音频信号的当前帧的频谱系数被划分为N个子带。 N是大于1的正整数。根据能量属性和N个子带的第一子集的频谱属性，确定是否修改第一子集中的子带的原始包络值。 第一子集中的每个M个子带的频率范围低于每个K个子带的频率范围。 基于需要修改M个子带的原始包络值的确定，M个子带的原始包络值被单独修改以获得M个子带的修改的包络值。 根据M个子带的修改的包络值和K个子带的原始包络值，将编码比特分配给N个子带中的每一个。

公开(公告)号：US20170011746A1

公开(公告)日：2017-01-12

申请号：US15264922

申请日：2016-09-14

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Xuan Zhou ,  Lei Miao ,  Zexin Liu

IPC: G10L19/002 ,  G10L19/032 ,  G10L19/02

CPC classification number: G10L19/002 ,  G10L19/0204 ,  G10L19/032

Abstract: The present disclosure provide a signal processing method and apparatus. The method includes: determining a total quantity of to-be-allocated bits corresponding to a current frame; implementing primary bit allocation on to-be-processed sub-bands; performing a primary information unit quantity determining operation for each sub-band that has undergone the primary bit allocation; selecting sub-bands for secondary bit allocation from the to-be-processed sub-bands according to at least one of a sub-band characteristic of each sub-band of the to-be-processed sub-bands or the total quantity of surplus bits; implementing secondary bit allocation on the sub-bands for secondary bit allocation; and performing a secondary information unit quantity determining operation for each sub-band of the sub-bands for secondary bit allocation.

Abstract translation: 本公开提供了一种信号处理方法和装置。 该方法包括：确定与当前帧相对应的待分配比特的总量; 在待处理子带上实现主比特分配; 对经过主比特分配的每个子带执行主要信息单元数量确定操作; 根据要处理的子频带的每个子带的子带特性中的至少一个或者剩余的总数量中的至少一个，从待处理的子带中选择用于辅助比特分配的子带 位 在子频段上实施辅助比特分配，用于辅助比特分配; 以及对副频带进行二次比特分配的次级信息单位量判定动作。

公开(公告)号：US09161038B2

公开(公告)日：2015-10-13

申请号：US14057646

申请日：2013-10-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/032 ,  H04N19/60 ,  G10L21/038 ,  G10L19/025 ,  G10L19/20

CPC classification number: G10L19/032 ,  G10L19/025 ,  G10L19/20 ,  G10L21/038 ,  G10L25/18 ,  H04N19/60

Abstract: A method and a device for encoding a high frequency signal, and a method and a device for decoding a high frequency signal are provided, which relate to encoding and decoding technology. The method for encoding a high frequency signal includes: determining a signal class of a high frequency signal of a current frame; smoothing and scaling time envelopes of the high frequency signal of the current frame and obtaining time envelopes of the high frequency signal of the current frame that require to be encoded, if the high frequency signal of the current frame is a non-transient signal and a high frequency signal of the previous frame is a transient signal; and quantizing and encoding the time envelopes of the high frequency signal of the current frame that require to be encoded, and frequency information and signal class information of the high frequency signal of the current frame.

Abstract translation: 提供了一种编码高频信号的方法和装置，以及用于解码高频信号的方法和装置，其涉及编码和解码技术。 编码高频信号的方法包括：确定当前帧的高频信号的信号类; 平滑和缩放当前帧的高频信号的时间包络并获得当前帧的高频信号需要被编码的时间包络，如果当前帧的高频信号是非瞬态信号，并且 前一帧的高频信号是瞬态信号; 对需要编码的当前帧的高频信号的时间包进行量化和编码，以及当前帧的高频信号的频率信息和信号类信息。

公开(公告)号：US20150206541A1

公开(公告)日：2015-07-23

申请号：US14675031

申请日：2015-03-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Zexin Liu ,  Lei Miao

IPC: G10L19/002

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 invention 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。 本发明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。