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.

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.

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.

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.

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。

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。

公开(公告)号：US20150332688A1

公开(公告)日：2015-11-19

申请号：US14806896

申请日：2015-07-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/02

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.

Abstract translation: 一种用于预测带宽扩展频带信号的方法包括解复用接收的比特流以获得频域信号; 确定频域信号中哪一位被分配的最高频率仓是否小于带宽扩展频带的预设起始频率仓; 根据确定预测带宽扩展频带的激励信号; 以及根据带宽扩展频带的预测激励信号和带宽扩展频带的频率包络来预测带宽扩展频带信号。

公开(公告)号：US20150127328A1

公开(公告)日：2015-05-07

申请号：US14547677

申请日：2014-11-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei Ma ,  Dejun Zhang ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/12 ,  G10L21/00 ,  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.

Abstract translation: 提供了向量联合编码/解码方法和向量联合编码器/解码器，联合编码了两个以上的向量，并且将至少一个向量的编码索引分离，然后在不同向量之间组合，使得编码不同的空闲空间 可以重新组合向量，从而有助于节省编码比特，并且由于矢量的编码索引被分离，并且随后更短的分割索引被重新组合，从而有助于减少编码/解码计算中的操作部分的比特宽度的要求。

公开(公告)号：US20140006016A1

公开(公告)日：2014-01-02

申请号：US13918263

申请日：2013-06-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao

IPC: G10L19/00

CPC classification number: G10L19/0017 ,  G10L19/24 ,  H04B7/0647

Abstract: A voice signal encoding and decoding method, device, and codec system are provided. The coding method includes: encoding an input voice signal to obtain a broadband code stream, where the broadband code stream includes a core layer bit stream and an extension enhancement layer bit stream (101); compressing the core layer bit stream to obtain a compressed code stream (102); and packing the compressed code stream and the extension enhancement layer bit stream to obtain a packed code stream (103). The core layer bit stream compressed, and the compressed code stream and the extension enhancement layer bit stream are packed, thereby reducing transmission bandwidth occupied by the input voice signal. Since the broadband voice encoding is performed on the input voice signal, a broadband voice code stream is transmitted by using narrowband transmission bandwidth, thereby improving the cost performance of voice signal transmission.

Abstract translation: 提供语音信号编码和解码方法，设备和编解码系统。 编码方法包括：编码输入语音信号以获得宽带码流，其中宽带码流包括核心层比特流和扩展增强层比特流（101）; 压缩核心层比特流以获得压缩码流（102）; 以及打包压缩码流和扩展增强层比特流以获得打包码流（103）。 压缩核心层比特流，压缩码流和扩展增强层比特流被打包，从而减少输入语音信号占用的传输带宽。 由于在输入语音信号上执行宽带语音编码，所以通过使用窄带传输带宽来发送宽带语音码流，从而提高语音信号传输的成本性能。

公开(公告)号：US20130268264A1

公开(公告)日：2013-10-10

申请号：US13862655

申请日：2013-04-15

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Anisse Taleb ,  Fengyan Qi ,  Chen Hu

IPC: G10L19/022

CPC classification number: G10L19/022 ,  G10L19/0212 ,  G10L19/20

Abstract: The present disclosure relates to a signal analyzer for processing an overlapped input signal frame comprising 2N subsequent input signal values. The signal analyzer comprises: a windower adapted to window the overlapped input signal frame to obtain a windowed signal, wherein the windower is adapted to zero M+N/2 subsequent input signal values of the overlapped input signal frame, wherein M is equal or greater than 1 and smaller than N/2; and a transformer adapted to transform the remaining 3N/2−M subsequent windowed signal values of the windowed signal using N−M sets of transform parameters to obtain a transformed-domain signal comprising N−M transformed-domain signal values.

Abstract translation: 本公开涉及一种用于处理包括2N个后续输入信号值的重叠输入信号帧的信号分析器。 所述信号分析器包括：风力发电机，其适于窗口重叠的输入信号帧以获得加窗信号，其中，所述加窗器适用于重叠输入信号帧的M + N / 2个后续输入信号值，其中M等于或大于 小于1，小于N / 2; 以及变压器，其适于使用N-M组变换参数来变换所述加窗信号的剩余3N / 2-M后续窗口化信号值，以获得包括N-M个变换域信号值的变换域信号。