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公开(公告)号：US08805695B2
公开(公告)日：2014-08-12
申请号：US13947778
申请日：2013-07-22
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/00
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。
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42.发明申请METHOD AND DEVICE FOR ENCODING A HIGH FREQUENCY SIGNAL, AND METHOD AND DEVICE FOR DECODING A HIGH FREQUENCY SIGNAL 有权用于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。
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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.
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。
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公开(公告)号：US12217764B2
公开(公告)日：2025-02-04
申请号：US18524654
申请日：2023-11-30
Applicant: Huawei Technologies Co., Ltd.
Abstract: An 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.
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45.发明公开公开(公告)号：US20240355343A1
公开(公告)日：2024-10-24
申请号：US18625538
申请日：2024-04-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Bin Wang , Zexin Liu , Haiting Li
CPC classification number: G10L19/0204 , G10L19/06 , G10L25/51 , H04L65/70 , H04L65/75 , H04S1/007 , H04S2400/03
Abstract: A stereo signal encoding method includes: obtaining a residual signal encoding parameter of a current frame of a stereo signal based on downmixed signal energy and residual signal energy of each of M sub-bands of the current frame, where the residual signal encoding parameter indicates whether to encode residual signals of the M sub-bands; determining whether to encode the residual signals based on the residual signal encoding parameter; and encoding the residual signals when it is determined that the residual signals need to be encoded.
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Patent Agency Ranking
公开(公告)号：US20240161755A1
公开(公告)日：2024-05-16
申请号：US18417518
申请日：2024-01-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Haiting Li , Zexin Liu , Lei Miao
IPC: G10L19/008
CPC classification number: G10L19/008
Abstract: An inter-channel phase difference (IPD) parameter extraction method includes obtaining a parameter for obtaining an information extraction manner for a current frame of a multi-channel signal; obtaining an IPD parameter extraction manner for the current frame based on the parameter for obtaining the information extraction manner, where the obtained IPD parameter extraction manner is one of at least two preset IPD parameter extraction manners; and obtaining an IPD parameter of the current frame based on the obtained IPD parameter extraction manner for the current frame.
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公开(公告)号：US11978463B2
公开(公告)日：2024-05-07
申请号：US17886087
申请日：2022-08-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Bin Wang , Zexin Liu , Haiting Li
CPC classification number: G10L19/0204 , G10L19/06 , G10L25/51 , H04L65/70 , H04L65/75 , H04S1/007 , H04S2400/03
Abstract: A stereo signal encoding method includes: obtaining a residual signal encoding parameter of a current frame of a stereo signal based on downmixed signal energy and residual signal energy of each of M sub-bands of the current frame, where the residual signal encoding parameter indicates whether to encode residual signals of the M sub-bands; determining whether to encode the residual signals based on the residual signal encoding parameter; and encoding the residual signals when it is determined that the residual signals need to be encoded.
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公开(公告)号：US11961526B2
公开(公告)日：2024-04-16
申请号：US17104425
申请日：2020-11-25
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Haiting Li , Bin Wang , Zexin Liu
IPC: G10L19/008 , G10L19/02 , G10L19/08 , G10L19/00
CPC classification number: G10L19/008 , G10L19/0208 , G10L19/08 , G10L2019/0001
Abstract: A method and an apparatus for calculating a downmixed signal and a residual signal are provided. According to the method, if a first target frame (a current frame or a previous frame of the current frame) is a switching frame, a to-be-encoded downmixed signal and a to-be-encoded residual signal of the subband corresponding to the preset frequency band in the current frame is calculated based on a switch fade-in/fade-out factor of a second target frame, an initial downmixed signal and an initial residual signal of the preset frequency band.
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公开(公告)号：US11869517B2
公开(公告)日：2024-01-09
申请号：US17102190
申请日：2020-11-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Haiting Li , Zexin Liu , Bin Wang
IPC: G10L19/008 , G10L25/18 , G10L25/21 , H04S1/00
CPC classification number: G10L19/008 , G10L25/18 , G10L25/21 , H04S1/007 , H04S2420/03
Abstract: This application discloses a downmixed signal calculation method and apparatus. The method includes: when a current frame or a previous frame of the current frame of a stereo signal is not a switching frame and a residual signal in the current frame or the previous frame does not need to be encoded, obtaining a second downmixed signal in the current frame and a downmix compensation factor of the current frame, correcting the second downmixed signal in the current frame based on the downmix compensation factor of the current frame, to obtain the first downmixed signal in the current frame and determining the first downmixed signal in the current frame as a downmixed signal in the current frame in a preset frequency band.
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公开(公告)号：US20230238010A1
公开(公告)日：2023-07-27
申请号：US18157518
申请日：2023-01-20
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/02 , G10L19/002
CPC classification number: G10L19/0204 , G10L19/002 , G10L19/02
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.
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