公开(公告)号：US20140044192A1

公开(公告)日：2014-02-13

申请号：US14057646

申请日：2013-10-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao ,  Anisse Taleb

IPC: H04N7/30

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

Abstract translation: 提供了一种编码高频信号的方法和装置，以及用于解码高频信号的方法和装置，其涉及编码和解码技术。 编码高频信号的方法包括：确定当前帧的高频信号的信号类; 平滑和缩放当前帧的高频信号的时间包络并获得当前帧的高频信号需要被编码的时间包络，如果当前帧的高频信号是非瞬态信号，并且 前一帧的高频信号是瞬态信号; 对需要编码的当前帧的高频信号的时间包进行量化和编码，以及当前帧的高频信号的频率信息和信号类信息。

公开(公告)号：US20130317831A1

公开(公告)日：2013-11-28

申请号：US13947778

申请日：2013-07-22

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zexin Liu ,  Lei Miao

IPC: G10L19/008

CPC classification number: G10L19/008 ,  G10L19/04 ,  G10L21/0388

Abstract: A bandwidth expansion method and apparatus are disclosed, where the method includes: estimating a bandwidth of at least one decoded frame of a whole-band signal, so as to obtain an estimated bandwidth, where the estimated bandwidth corresponds to a whole-band signal that a decoded lower-band signal needs to be extended into; performing first predictive decoding on a part of the lower-band signal in a band above an effective bandwidth of the lower-band signal and below the estimated bandwidth, so as to obtain the part of the lower-band signal above the effective bandwidth of the lower-band signal and below the estimated bandwidth; and performing second predictive decoding on a part of the lower-band signal in a band above the estimated bandwidth, so as to obtain the part of the lower-band signal above the estimated bandwidth.

Abstract translation: 公开了一种带宽扩展方法和装置，其中所述方法包括：估计全频带信号的至少一个解码帧的带宽，以获得估计带宽，其中估计带宽对应于全带信号， 解码的低频信号需要扩展到; 对低频带信号的有效带宽以上的频带内的低频带信号的一部分进行第一预测解码，并且低于估计的带宽，以便将低频带信号的部分低于有效带宽 低频信号和低于估计的带宽; 以及在所述估计带宽以上的频带中对所述低频带信号的一部分执行第二预测解码，以便获得所述低频带信号的所述估计带宽以上的部分。

公开(公告)号：US20250037726A1

公开(公告)日：2025-01-30

申请号：US18917486

申请日：2024-10-16

Applicant: Huawei Technologies Co., Ltd.

Inventor： Haiting Li ,  Zexin Liu ,  Xingtao Zhang ,  Lei Miao

IPC: G10L19/008 ,  H04S3/00

Abstract: A method for encoding an audio signal includes obtaining an ITD value of a current frame of an audio signal; obtaining a characteristic parameter of the current frame, wherein the characteristic parameter comprises at least one of a signal-to-noise ratio of the current frame or a peak feature of cross correlation coefficients of the current frame; determining, based on the characteristic parameter, whether to use the initial ITD value as the finalized ITD value of the current frame; and encoding the current frame based on the finalized ITD value of the current frame, wherein if the initial ITD value is determined as not used as the finalized ITD value of the current frame, the finalized ITD value of the current frame is the same as a finalized ITD value of a previous frame of the current frame.

公开(公告)号：US12067993B2

公开(公告)日：2024-08-20

申请号：US18069573

申请日：2022-12-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xingtao Zhang ,  Haiting Li ,  Zexin Liu ,  Lei Miao

IPC: G10L19/008 ,  G10L19/032 ,  H04S3/00

CPC classification number: G10L19/008 ,  G10L19/032 ,  H04S3/008 ,  H04S2400/03 ,  H04S2420/03

Abstract: The present disclosure discloses an inter-channel phase difference parameter encoding method, where a current frame is obtained; a signal type and a previous IPD parameter encoding scheme of a previous frame are obtained; a current IPD parameter encoding scheme is obtained at least based on the signal type of the previous frame and the previous IPD parameter encoding scheme; and an IPD parameter of the current frame is processed based on the current IPD parameter encoding scheme.

公开(公告)号：US11922958B2

公开(公告)日：2024-03-05

申请号：US18065043

申请日：2022-12-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Eyal Shlomot ,  Haiting Li ,  Zexin Liu

IPC: G10L19/008 ,  G10L19/032

CPC classification number: G10L19/008 ,  G10L19/032

Abstract: Various embodiments provide a method and an apparatus for determining a weighting factor during stereo signal encoding. In those embodiments, a parameter value corresponding to the encoding mode of the to-be-encoded signal is determined based on an encoding mode of a to-be-encoded signal in a stereo signal and a correspondence between an encoding mode and a parameter value. Based on the determined parameter value and an energy spectrum of a linear prediction filter corresponding to an original line spectral frequency parameter of the to-be-encoded signal, a weighting factor for calculating a distance between the original line spectral frequency parameter and a target original line spectral frequency parameter is calculated.

公开(公告)号：US20230199424A1

公开(公告)日：2023-06-22

申请号：US18173542

申请日：2023-02-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Cal Armstrong ,  Gavin Kearney ,  Bin Wang ,  Zexin Liu

IPC: H04S7/00

CPC classification number: H04S7/303 ,  H04S2400/01 ,  H04S2420/01

Abstract: An audio processing method includes processing, by M first virtual speakers, a to-be-processed audio signal to obtain M first audio signals; processing, by N second virtual speakers, the to-be-processed audio signal to obtain N second audio signals; obtain M first head-related transfer functions (HRTFs) centered at a left ear position and N second HRTFs centered at a right ear position; obtain a first target audio signal based on the M first audio signals and the M first HRTFs; and obtain a second target audio signal based on the N second audio signals and the N second HRTFs.

公开(公告)号：US11580996B2

公开(公告)日：2023-02-14

申请号：US17376813

申请日：2021-07-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Lei Miao ,  Zexin Liu

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

Abstract: A signal processing method and device includes obtaining spectral coefficients of a current frame of an audio signal, in which N sub-bands of the current frame comprises at least one of the spectral coefficients. A total energy of M successive sub-bands of the N sub-bands, a total energy of K successive sub-bands of the N sub-bands, and an energy of a first sub-band are obtained to determine whether to modify original envelope values of the M sub-bands. When the original envelope values of the M sub-bands are modified, encoding bits are allocated to each of the N sub-bands according to the modified envelope values of the M sub-bands.

公开(公告)号：US11361775B2

公开(公告)日：2022-06-14

申请号：US16797446

申请日：2020-02-21

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Eyal Shlomot ,  Haiting Li ,  Zexin Liu

IPC: G10L19/008 ,  G10L19/083

Abstract: Example signal reconstructing method and apparatus are described. One example method includes obtaining a reference sound channel and a target sound channel. An adaptive length of a transition segment is obtained based on an inter-channel time difference in the current frame and an initial length of the transition segment. A transition window in the current frame is obtained based on the adaptive length of the transition segment. A gain modification factor of a reconstructed signal is obtained. A transition segment signal on the target sound channel is obtained based on the inter-channel time difference, the adaptive length of the transition segment, the transition window, the gain modification factor, and a reference sound channel signal and a target sound channel signal.

公开(公告)号：US11031021B2

公开(公告)日：2021-06-08

申请号：US16723449

申请日：2019-12-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xingtao Zhang ,  Haiting Li ,  Zexin Liu ,  Lei Miao

IPC: G10L19/008 ,  H04S3/00 ,  G10L19/032

Abstract: This application discloses an IPD parameter encoding method, including: obtaining a reference parameter used to determine an IPD parameter encoding scheme of a current frame of a multi-channel signal; determining the IPD parameter encoding scheme of the current frame based on the reference parameter, where the determined IPD parameter encoding scheme of the current frame is one of at least two preset IPD parameter encoding schemes; and processing an IPD parameter of the current frame based on the determined IPD parameter encoding scheme of the current frame. The technical solutions provided in this application can improve encoding quality of the multi-channel signal.

公开(公告)号：US10770085B2

公开(公告)日：2020-09-08

申请号：US16238797

申请日：2019-01-03

Applicant: Huawei Technologies Co., Ltd.

Inventor： Bin Wang ,  Zexin Liu ,  Lei Miao

IPC: G10L19/03 ,  G10L19/26 ,  G10L21/038 ,  G10L19/12 ,  G10L19/02 ,  G10L19/00

Abstract: An encoding method, a decoding method, an encoding apparatus, a decoding apparatus, a transmitter, a receiver, and a communications system, where 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, 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.