公开(公告)号：US20160111105A1

公开(公告)日：2016-04-21

申请号：US14981923

申请日：2015-12-29

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Chen HU ,  Lei MIAO ,  Zexin LIU

IPC: G10L19/038 ,  G10L19/06

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.

Abstract translation: 本申请的实施例提出了一种频率包络矢量量化方法和装置，其中该方法包括：将一帧中的N个频率包络分成N1个矢量; 通过使用第一码本量化N1矢量中的第一矢量，以获得与量化的第一矢量相对应的码字，其中第一码本分为2B1个部分; 根据与量化的第一矢量对应的代码字来确定; 根据第i部分的码本确定第二码本; 并且基于第二码本对N1个矢量中的第二矢量进行量化。 在本申请的实施例中，可以通过使用具有较小位数的码本来对频率包络向量执行矢量量化。 因此，可以减少矢量量化的复杂度，并且也可以确保矢量量化的效果。

公开(公告)号：US20130317810A1

公开(公告)日：2013-11-28

申请号：US13950018

申请日：2013-07-24

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fuwei MA ,  Dejun ZHANG ,  Lei MIAO ,  Fengyan QI

IPC: G10L19/04

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：US20220139404A1

公开(公告)日：2022-05-05

申请号：US17355785

申请日：2021-06-23

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Haiting LI ,  Bin WANG ,  Lei MIAO

IPC: G10L19/008 ,  G10L19/20 ,  G10L19/22

Abstract: An audio encoding and decoding method and a related apparatus are provided. The audio encoding method may include: determining a coding mode of a current frame; when determining that the coding mode of the current frame is an anticorrelated signal coding mode, performing time-domain downmix processing on left and right channel signals in the current frame by using a time-domain downmix processing manner corresponding to the anticorrelated signal coding mode, to obtain a primary channel signal and a secondary channel signal, where the time-domain downmix processing manner corresponding to the anticorrelated signal coding mode is a time-domain downmix processing manner corresponding to an anticorrelated signal channel combination scheme, and the anticorrelated signal channel combination scheme is a channel combination scheme corresponding to a near out of phase signal; and encoding the obtained primary channel signal and secondary channel signal in the current frame.

公开(公告)号：US20170110137A1

公开(公告)日：2017-04-20

申请号：US15391339

申请日：2016-12-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bin WANG ,  Zexin LIU ,  Lei MIAO

IPC: G10L19/12 ,  G10L19/26 ,  G10L19/02

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.

公开(公告)号：US20160118054A1

公开(公告)日：2016-04-28

申请号：US14981956

申请日：2015-12-29

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Bin WANG ,  Lei MIAO ,  Zexin LIU

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 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.

Abstract translation: 提供了一种用于恢复媒体比特流中的丢帧的方法。 当帧丢失事件发生时，解码器获得当前丢失帧的合成高频带信号，以及与当前丢帧相关的恢复信息。 解码器确定当前丢失帧的全局增益梯度，并且还根据当前丢失帧的先前M帧中的全局增益梯度和每帧的全局增益来确定当前丢失帧的全局增益。 通过根据当前丢失帧的全局增益和子帧增益调整当前丢失帧的合成高频带信号，获得当前丢帧的高频带信号。 该过程使帧之间的高频信号能够自然平滑地转换，并且衰减高频信号中的噪声。

公开(公告)号：US20160111104A1

公开(公告)日：2016-04-21

申请号：US14984703

申请日：2015-12-30

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin LIU ,  Lei MIAO ,  Chen HU

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

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

Abstract: Embodiments of the present disclosure provide signal encoding and decoding methods and devices. The method includes: determining, a quantity k of subbands to be encoded, where i is a positive number, and k is a positive integer; selecting, according to quantized envelopes of all subbands, k subbands from all the subbands, or selecting k subbands from all subbands according to a psychoacoustic model; and performing a first-time encoding operation on spectral coefficients of the k subbands. In the embodiments of the present disclosure, the quantity k of subbands to be encoded is determined according to the quantity of available bits and the first saturation threshold, and encoding is performed on the k subbands that are selected from all the subbands, instead of on an entire frequency band, which can reduce spectrum holes of a signal obtained through decoding, and therefore, can improve auditory quality of an output signal.

Abstract translation: 本公开的实施例提供信号编码和解码方法和装置。 该方法包括：确定要编码的子带的数量k，其中i是正数，k是正整数; 根据所有子带的量化包络选择来自所有子带的k个子带，或者根据心理声学模型从所有子带中选择k个子带; 以及对k个子带的频谱系数执行第一次编码操作。 在本公开的实施例中，根据可用比特量和第一饱和阈值来确定要编码的子带的数量k，并且对从所有子带中选择的k个子带进行编码，而不是在 整个频带，其可以减少通过解码获得的信号的频谱孔，并且因此可以提高输出信号的听觉质量。

公开(公告)号：US20150302860A1

公开(公告)日：2015-10-22

申请号：US14789755

申请日：2015-07-01

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan QI ,  Zexin LIU ,  Lei MIAO

IPC: G10L19/032 ,  G10L19/002

CPC classification number: G10L19/032 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/028

Abstract: An audio signal encoding method is provided. The method includes: dividing a frequency band of an audio signal into a plurality of sub-bands, and quantifying a sub-band normalization factor of each sub-band; determining signal bandwidth of bit allocation according to the quantified sub-band normalization factor, or according to the quantified sub-band normalization factor and bit rate information; allocating bits for a sub-band within the determined signal bandwidth; and coding a spectrum coefficient of the audio signal according to the bits allocated for each sub-band. According to embodiments of the present invention, during coding and decoding, signal bandwidth of bit allocation is determined according to the quantified sub-band normalization factor and bit rate information. In this manner, the determined signal bandwidth is effectively coded and decoded by centralizing the bits, and audio quality is improved.

Abstract translation: 提供了一种音频信号编码方法。 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; 根据量化的子带归一化因子，或根据量化的子带归一化因子和比特率信息确定比特分配的信号带宽; 在所确定的信号带宽内分配用于子带的比特; 以及根据为每个子带分配的比特来对音频信号的频谱系数进行编码。 根据本发明的实施例，在编码和解码期间，根据量化的子带归一化因子和比特率信息来确定比特分配的信号带宽。 以这种方式，通过集中位来有效地对确定的信号带宽进行编码和解码，并提高音频质量。