公开(公告)号：US20170178633A1

公开(公告)日：2017-06-22

申请号：US15451866

申请日：2017-03-07

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Fengyan Qi ,  Lei Miao

IPC: G10L19/002 ,  G10L19/028 ,  G10L19/02

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：US20170084282A1

公开(公告)日：2017-03-23

申请号：US15369396

申请日：2016-12-05

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/028 ,  G10L21/0316 ,  G10L21/038 ,  G10L19/16

CPC classification number: G10L19/028 ,  G10L19/167 ,  G10L19/26 ,  G10L21/02 ,  G10L21/0316 ,  G10L21/038

Abstract: Method and apparatus are provided for reconstructing a noise component of a speech/audio signal. A bitstream, is received and decoded to obtain a speech/audio signal. A first speech/audio signal is determined according to the speech/audio signal. A symbol of each sample value in the first speech/audio signal and an amplitude value of each sample value in the first speech/audio signal is determined. An adaptive normalization length and an adjusted amplitude value of each sample value are determined according to the adaptive normalization length and the amplitude value of each sample value. A second speech/audio signal is determined according to the symbol of each sample value and the adjusted amplitude value of each sample value.

公开(公告)号：US20170076733A1

公开(公告)日：2017-03-16

申请号：US15358649

申请日：2016-11-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/16 ,  G10L19/02 ,  G10L19/06

CPC classification number: G10L19/167 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/06 ,  G10L19/26 ,  H04L5/06 ,  H04L27/2602

Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.

Abstract translation: 在信号编码方法中，调整分配给从输入信号获得的频域信号的不同频带的编码比特，以提高编码质量。 根据预定的分配规则，首先将用于编码的总可用比特分配给频域信号的频带。 然后，当分配比特的频域信号的最高频率大于预定值时，调整分配给频域信号的各个频带的比特数。 根据针对频域信号的频带的调整后的比特分配对频域信号进行编码。

公开(公告)号：US20170053661A1

公开(公告)日：2017-02-23

申请号：US15341451

申请日：2016-11-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Miao ,  Zexin Liu

IPC: G10L19/26 ,  G10L19/087 ,  G10L19/18 ,  G10L19/02

CPC classification number: G10L19/265 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/087 ,  G10L19/18 ,  G10L21/038 ,  G10L25/18

Abstract: The present disclosure relates to an audio signal coding method and apparatus. The method includes categorizing audio signals into high-frequency audio signals and low-frequency audio signals, coding the low-frequency audio signals using a corresponding low-frequency coding manner according to characteristics of low-frequency audio signals, and selecting a bandwidth extension mode to code the high-frequency audio signals according to the low-frequency coding manner and/or characteristics of the audio signals.

Abstract translation: 本公开涉及音频信号编码方法和装置。 该方法包括将音频信号分为高频音频信号和低频音频信号，根据低频音频信号的特性，使用相应的低频编码方式对低频音频信号进行编码，并选择带宽扩展模式 根据低频编码方式和/或音频信号的特性对高频音频信号进行编码。

公开(公告)号：US09537694B2

公开(公告)日：2017-01-03

申请号：US14496986

申请日：2014-09-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: H04L27/26 ,  H04L5/06 ,  G10L19/002 ,  G10L19/02 ,  G10L19/26

CPC classification number: G10L19/167 ,  G10L19/002 ,  G10L19/0204 ,  G10L19/06 ,  G10L19/26 ,  H04L5/06 ,  H04L27/2602

Abstract: In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.

Abstract translation: 在信号编码方法中，调整分配给从输入信号获得的频域信号的不同频带的编码比特，以提高编码质量。 根据预定的分配规则，首先将用于编码的总可用比特分配给频域信号的频带。 然后，当分配比特的频域信号的最高频率大于预定值时，调整分配给频域信号的各个频带的比特数。 根据针对频域信号的频带的调整后的比特分配对频域信号进行编码。

公开(公告)号：US20160247513A1

公开(公告)日：2016-08-25

申请号：US15146079

申请日：2016-05-04

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/12 ,  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.

公开(公告)号：US20150332699A1

公开(公告)日：2015-11-19

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

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.

Abstract translation: 一种方法包括获得音频信号的信号类型和音频信号的低频带信号，其中音频信号包括低频带信号和高频带信号; 根据信号类型获得高频信号的频率包络; 根据低频带信号预测高频信号的激励信号; 以及根据高频带信号的频率包络和高频带信号的激励信号恢复高频带信号。 通过使用本发明的实施例的技术方案，可以有效地减少通过预测获得的高频带信号与实际的高频带信号之间存在的误差，并且预测的高频带信号的精度率可以是 增加。

公开(公告)号：US20150269947A1

公开(公告)日：2015-09-24

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

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.

Abstract translation: 一种解码信号的方法和装置。 用于解码信号的方法包括：通过解码从接收到的比特流获得子带的频谱系数; 将频谱系数定位到具有饱和比特分配的子带和具有不饱和比特分配的子带的子带中; 对未通过解码获得的频谱系数进行噪声填充，并且在具有不饱和位分配的子带中进行噪声填充，以恢复未通过解码获得的频谱系数; 并根据通过解码获得的频谱系数和恢复的频谱系数获得频域信号。 因此，可以通过分类获得频域信号中具有不饱和位分配的子带，从而提高信号解码质量。

公开(公告)号：US20150255080A1

公开(公告)日：2015-09-10

申请号：US14721606

申请日：2015-05-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/03 ,  G10L19/26 ,  G10L19/12

CPC classification number: G10L19/03 ,  G10L19/0204 ,  G10L19/12 ,  G10L19/26 ,  G10L19/265 ,  G10L21/038 ,  G10L2019/0016

Abstract: An encoding method, a decoding method, an encoding apparatus, a decoding apparatus, a transmitter, a receiver, and a communications system. The encoding method includes: dividing a to-be-encoded time-domain signal into a low band signal and a high band signal; performing encoding on the low band signal to obtain a low frequency encoding parameter; performing encoding on the high band signal to obtain a high frequency encoding parameter, and obtaining a synthesized high band signal; performing short-time post-filtering processing on the synthesized high band signal to obtain a short-time filtering signal; and calculating a high frequency gain based on the high band signal and the short-time filtering signal. A technical solution according to the embodiments of the present invention can improve an encoding and/or decoding effect.

Abstract translation: 编码方法，解码方法，编码装置，解码装置，发射机，接收机和通信系统。 编码方法包括：将待编码的时域信号划分为低频带信号和高频带信号; 对低频信号执行编码以获得低频编码参数; 对高频带信号执行编码以获得高频编码参数，并获得合成的高频带信号; 对合成的高频带信号执行短时后滤波处理以获得短时滤波信号; 以及基于所述高频带信号和所述短时间滤波信号计算高频增益。 根据本发明的实施例的技术方案可以提高编码和/或解码效果。

公开(公告)号：US20150162011A1

公开(公告)日：2015-06-11

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

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。