公开(公告)号：US09972326B2

公开(公告)日：2018-05-15

申请号：US15354641

申请日：2016-11-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Fengyan Qi ,  Zexin Liu ,  Lei Miao

IPC: G10L19/02 ,  G10L19/002 ,  G10L19/035 ,  G10L19/032

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.

公开(公告)号：US20170352359A1

公开(公告)日：2017-12-07

申请号：US15684079

申请日：2017-08-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Fengyan Qi

IPC: G10L19/16 ,  H04L5/06 ,  G10L19/06 ,  G10L19/02 ,  H04L27/26 ,  G10L19/002 ,  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.

公开(公告)号：US09704498B2

公开(公告)日：2017-07-11

申请号：US15192405

申请日：2016-06-24

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/00 ,  G10L21/00 ,  G10L13/00 ,  G10L19/038 ,  G10L19/107 ,  G10L19/04 ,  G10L19/12 ,  G01L19/12

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：US20170194016A1

公开(公告)日：2017-07-06

申请号：US15467356

申请日：2017-03-23

Applicant: HUAWEI TECHNOLOGIES CO.,LTD.

Inventor： Fengyan Qi ,  Lei Miao

IPC: G10L21/013 ,  G10L21/028 ,  G10L25/90

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.

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：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：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：US20160307577A1

公开(公告)日：2016-10-20

申请号：US15192405

申请日：2016-06-24

Applicant: Huawei Technologies Co., Ltd.

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

IPC: G10L19/038 ,  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：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。