公开(公告)号：US09728197B2

公开(公告)日：2017-08-08

申请号：US14879388

申请日：2015-10-09

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: G10L19/032 ,  G10L21/038 ,  G10L19/20 ,  H04N19/60 ,  G10L25/18 ,  G10L19/025

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 type 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 type information of the high frequency signal of the current frame.

公开(公告)号：US09685165B2

公开(公告)日：2017-06-20

申请号：US15080950

申请日：2016-03-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L21/00 ,  G10L19/00 ,  G10L21/04 ,  G10L19/12 ,  G10L19/06 ,  G10L19/08 ,  G10L21/038 ,  G10L19/02 ,  G10L19/24

CPC classification number: G10L19/12 ,  G10L19/0208 ,  G10L19/06 ,  G10L19/08 ,  G10L19/24 ,  G10L21/038 ,  G10L2019/0016

Abstract: A method and an apparatus for predicting a high band excitation signal are disclosed. The method includes: acquiring, according to a received low band bitstream, a set of spectral frequency parameters that are arranged in an order of frequencies, calculating a spectral frequency parameter difference between every two spectral frequency parameters that have a same position interval; acquiring a minimum spectral frequency parameter difference from the calculated spectral frequency parameter differences; determining, according to a frequency bin that corresponds to the minimum spectral frequency parameter difference, a start frequency bin for predicting a high band excitation signal from a low band; and predicting the high band excitation signal from the low band according to the start frequency bin. By implementing embodiments of the present invention, a high band excitation signal can be better predicted, thereby improving performance of the high band excitation signal.

公开(公告)号：US20170125031A1

公开(公告)日：2017-05-04

申请号：US15408442

申请日：2017-01-18

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/22 ,  G10L19/12 ,  G10L19/02

CPC classification number: G10L19/22 ,  G10L19/0204 ,  G10L19/0208 ,  G10L19/0212 ,  G10L19/12 ,  G10L25/18 ,  G10L25/21

Abstract: An audio encoding method and a related apparatus are disclosed. The audio coding method includes: performing a time-frequency transformation on a current frame of a time-domain audio signal, to obtain spectral coefficients of the current audio frame; obtaining one or more reference coding parameters of the current frame; and determining whether the reference coding parameters satisfy a set of parameter conditions. If any one of the parameter conditions is satisfied, the spectral coefficients of the current frame are encoded by using a transform coded excitation (TCX) algorithm. If none of the parameter conditions is satisfied, the spectral coefficients of the current audio frame are encoded using a high quality transform coding (HQ) algorithm. The audio encoding method and the related apparatus help improve encoding quality or encoding efficiency in audio signal encoding.

公开(公告)号：US09626972B2

公开(公告)日：2017-04-18

申请号：US14730524

申请日：2015-06-04

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.

公开(公告)号：US20160275955A1

公开(公告)日：2016-09-22

申请号：US15170524

申请日：2016-06-01

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 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.

Abstract translation: 本公开提供了一种与通信领域相关的编码方法和装置，并且可以对音频信号的频谱系数执行适当的量化比特分配，从而通过解码来提高由解码器获得的信号的质量。 该方法包括：将当前数据帧的频谱系数分解为子带，获取子带的量化频率包络值; 修改子带中第一数量的子带的量化频率包络值; 根据所述第一数量的子带的经修改的量化频率包络值向所述子带分配量化比特; 量化在子带中分配量化比特的子带的频谱系数; 并将量化位分配给子帧的量化频谱系数写入到比特流中。

公开(公告)号：US09404826B2

公开(公告)日：2016-08-02

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: G10L19/00 ,  G10L21/00 ,  G10L13/00 ,  G01L19/12 ,  G10L19/038 ,  G10L19/107 ,  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.

公开(公告)号：US20160196829A1

公开(公告)日：2016-07-07

申请号：US15068908

申请日：2016-03-14

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Bin Wang

IPC: G10L19/087 ,  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 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.

Abstract translation: 本发明提供一种带宽扩展方法和装置。 该方法包括：获取带宽扩展参数，其中带宽扩展参数包括以下参数中的一个或多个：线性预测系数（LPC），线谱频率（LSF）参数，音调周期，解码速率， 自适应码本贡献和代数码本贡献; 并且根据所述带宽扩展参数对解码的低频信号执行带宽扩展，以获得高频带信号。 通过使用本发明的实施例中的带宽扩展方法和装置恢复的高频带信号接近原始的高频带信号，并且质量令人满意。

公开(公告)号：US20150073781A1

公开(公告)日：2015-03-12

申请号：US14543320

申请日：2014-11-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Lei Miao

IPC: G10L21/013

CPC classification number: G10L21/013 ,  G10L19/00 ,  G10L21/028 ,  G10L25/00 ,  G10L25/90

Abstract: A method and an apparatus for detecting correctness of a pitch period. The method for detecting correctness of a pitch period includes determining, according to an initial pitch period of an input signal in a time domain, a pitch frequency bin of the input signal, where the initial pitch period is obtained by performing open-loop detection on the input signal; determining, based on an amplitude spectrum of the input signal in a frequency domain, a pitch period correctness decision parameter, associated with the pitch frequency bin, of the input signal; and determining correctness of the initial pitch period according to the pitch period correctness decision parameter. The method and apparatus for detecting correctness of a pitch period according to the embodiments of the present invention can improve, based on a relatively less complex algorithm, accuracy of detecting correctness of a pitch period.

Abstract translation: 一种用于检测音调周期的正确性的方法和装置。 用于检测音调周期的正确性的方法包括根据时域中的输入信号的初始音调周期来确定输入信号的音调频率bin，其中通过执行开环检测获得初始音调周期 输入信号; 基于频域中的输入信号的幅度谱确定与输入信号的音调频率仓相关联的音调周期正确性判定参数; 以及根据音调周期正确性判定参数确定初始音调周期的正确性。 根据本发明的实施例的用于检测音调周期的正确性的方法和装置可以基于相对较不复杂的算法来改善检测音调周期的正确性的精度。

公开(公告)号：US08831961B2

公开(公告)日：2014-09-09

申请号：US13914206

申请日：2013-06-10

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Miao ,  Fengyan Qi ,  Jianfeng Xu ,  Dejun Zhang ,  Qing Zhang

IPC: G10L19/00 ,  G10L19/18 ,  G10L21/06 ,  G10L19/06 ,  G10L19/09

CPC classification number: G10L21/06 ,  G10L19/06 ,  G10L19/09 ,  G10L19/18

Abstract: The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.

Abstract translation: 本公开涉及编码和解码技术，并且公开了一种预处理方法，预处理装置和编码装置。 预处理方法包括：获得当前帧信号的特征信息; 识别当前帧信号是否不需要根据当前帧信号和预设信息的特征信息去除LTC的编码操作; 并且如果识别出当前帧信号不需要去除LTC的编码操作，则执行去除当前帧信号的STC的编码操作; 并且如果识别当前帧信号需要去除LTC的编码操作，则执行去除当前帧信号的LTC和STC的编码操作。 通过本文提供的技术方案，仅对部分输入帧信号执行去除LTC的编码操作。

公开(公告)号：US20140207445A1

公开(公告)日：2014-07-24

申请号：US14219773

申请日：2014-03-19

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yang Gao ,  Herve Marcel Taddei ,  Lei Miao

IPC: G10L19/00

CPC classification number: G10L19/0017 ,  G10L19/005

Abstract: In an embodiment, a method of receiving a digital audio signal, using a processor, includes generating a high band time domain signal; generating low band time domain signal; estimating an energy ratio between the high band and the low band from a last good frame; keeping the energy ratio for following frame-erased frames by applying an energy correction scaling gain to a high band signal segment by segment in the time domain; and combining the low band signal and the high band signal into a final output.

Abstract translation: 在一个实施例中，使用处理器接收数字音频信号的方法包括产生高频带时域信号; 产生低频时域信号; 从最后的良好帧估计高频带和低频带之间的能量比; 通过在时域中逐段对高频带信号进行能量校正缩放增益来保持随后的帧擦除帧的能量比; 并将低频带信号和高频带信号组合成最终输出。