公开(公告)号：US10347257B2

公开(公告)日：2019-07-09

申请号：US15650714

申请日：2017-07-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L19/00 ,  G10L19/002 ,  G10L19/02 ,  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：US10311885B2

公开(公告)日：2019-06-04

申请号：US15817296

申请日：2017-11-20

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/02 ,  G10L19/24 ,  G10L25/93 ,  G10L19/005 ,  G10L19/083 ,  G10L21/038 ,  G10L21/0388

Abstract: A method for recovering a lost frame in a received audio signal includes: obtaining an initial high-frequency band signal of a current lost frame in the received audio signal; calculating a ratio R, wherein the ratio R is a ratio of a high frequency excitation energy of a previous frame of the current lost frame to a high frequency excitation energy of the current lost frame; obtaining a global gain of the current lost frame according to the ratio R and a global gain of the previous frame of the current lost frame; and recovering a high-frequency band signal of the current lost frame according to the initial high-frequency band signal of the current lost frame and the global gain of the current lost frame. The method can be used in an audio signal decoding process for low-loss recovery of lost frames of the audio signal.

公开(公告)号：US10186272B2

公开(公告)日：2019-01-22

申请号：US15481306

申请日：2017-04-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Bin Wang

IPC: G10L21/038 ,  G10L19/07 ,  G10L21/0388 ,  G10L19/087 ,  G10L19/12 ,  G10L25/90 ,  G10L19/00

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 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：US10186271B2

公开(公告)日：2019-01-22

申请号：US15686175

申请日：2017-08-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

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

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.

公开(公告)号：US20170372715A1

公开(公告)日：2017-12-28

申请号：US15696591

申请日：2017-09-06

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 application 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：US20150235653A1

公开(公告)日：2015-08-20

申请号：US14704502

申请日：2015-05-05

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Bin Wang ,  Lei Miao

IPC: G10L21/0388 ,  G10L19/26 ,  G10L19/08

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.

Abstract translation: 音频信号编码和解码方法，音频信号编码和解码装置，发射机，接收机和通信系统，其可以改善编码和/或解码性能。 音频信号编码方法包括将待编码的时域信号划分成低频带信号和高频带信号; 编码低频信号以获得低频编码参数; 计算有声度因子，并预测高频激励信号; 使用有声度因子对高频带激励信号和随机噪声进行加权，以获得合成的激励信号; 以及基于合成的激励信号和高频带信号获得高频编码参数。 本发明实施例中的技术方案可以改善编码或解码效果。