-
公开(公告)号：US20230206929A1
公开(公告)日：2023-06-29
申请号：US18179399
申请日：2023-03-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/028 , G10L19/02 , G10L19/005
CPC classification number: G10L19/002 , G10L19/028 , G10L19/0204 , G10L19/005
Abstract: In a method to decode signals, a computing device decodes spectral coefficients of a current frame are grouped into a plurality of sub-bands. The computing device classifies a sub-band as a bit allocation unsaturated sub-band based on an average quantity of allocated bits per spectral coefficient of a sub-band of the plurality of sub-bands and a threshold. The computing device obtains a noise filling gain based on an envelope of the sub-band, and obtains a reconstructed spectral coefficient of the sub-band by performing noise filling based on the noise filling gain. The computing device then obtains a frequency domain audio signal based on spectral coefficients in the sub-band obtained by decoding and the reconstructed spectral coefficient.
-
公开(公告)号：US11610592B2
公开(公告)日：2023-03-21
申请号：US17204073
申请日：2021-03-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zexin Liu , Fengyan Qi , Lei Miao
IPC: G10L19/002 , G10L19/028 , G10L19/02 , G10L19/005
Abstract: An audio signal decoding device includes a non-transitory memory storage stores audio data in a form of a bitstream; and an audio decoder, by which a first spectral coefficient of a first sub-band of a current frame of an audio signal by decoding the bitstream is obtained; a first average quantity of allocated bits per spectral coefficient of the first sub-band is obtained; a first noise filling gain for the first sub-band is obtained when the first average quantity is less than a threshold; a second spectral coefficient is reconstructed according to the first noise filling gain; a frequency domain audio signal is obtained according to the first spectral coefficient and the second spectral coefficient; and a time domain audio signal is generated according to the frequency domain signal.
-
公开(公告)号：US11462224B2
公开(公告)日：2022-10-04
申请号：US17104852
申请日：2020-11-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Bin Wang , Zexin Liu , Haiting Li
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.
-
公开(公告)号：US20220172730A1
公开(公告)日：2022-06-02
申请号：US17672824
申请日：2022-02-16
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/002 , G10L19/02 , G10L19/035
Abstract: An audio signal encoding method and device are provided. The method and device are used to encode an audio signal to obtain a bitstream representing the analog audio signal, in which a proper bit allocation for spectral coefficients can be performed.
-
公开(公告)号：US20220084531A1
公开(公告)日：2022-03-17
申请号：US17536932
申请日：2021-11-29
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.
-
Patent Agency Ranking
公开(公告)号：US11133014B2
公开(公告)日：2021-09-28
申请号：US16272397
申请日：2019-02-11
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zexin Liu , Xingtao Zhang , Haiting Li , Lei Miao
IPC: G10L19/008 , G10L19/022 , G10L19/032 , G10L25/03 , H04S3/00
Abstract: A multi-channel signal encoding method and an encoder, where the encoding method includes obtaining a multi-channel signal of a current frame, determining an initial multi-channel parameter of the current frame, determining a difference parameter based on the initial multi-channel parameter of the current frame and multi-channel parameters of previous K frames of the current frame, where the difference parameter represents a difference between the initial multi-channel parameter of the current frame and the multi-channel parameters of the previous K frames, and K is an integer greater than or equal to one, determining a multi-channel parameter of the current frame based on the difference parameter and a characteristic parameter of the current frame, and encoding the multi-channel signal based on the multi-channel parameter of the current frame. Hence, the method and the encoder ensure better accuracy of inter-channel information of a multi-channel signal.
-
公开(公告)号：US11081121B2
公开(公告)日：2021-08-03
申请号：US16725678
申请日：2019-12-23
Applicant: Huawei Technologies Co., Ltd.
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：US10657977B2
公开(公告)日：2020-05-19
申请号：US15985281
申请日：2018-05-21
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/00 , G10L19/028 , G10L19/26 , G10L21/02 , G10L19/16 , 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：US10460741B2
公开(公告)日：2019-10-29
申请号：US15699694
申请日：2017-09-08
Applicant: Huawei Technologies Co., Ltd.
IPC: G10L19/00 , G10L15/00 , G10L19/12 , G10L19/06 , G10L19/025
Abstract: An audio coding method and apparatus, where the method includes, for each audio frame in audio, when a signal characteristic of the audio frame and a signal characteristic of a previous audio frame meet a preset modification condition, determining a first modification weight according to linear spectral frequency (LSF) differences of the audio frame and the LSF differences of the previous audio frame, modifying a linear predictive parameter of the audio frame according to the determined first modification weight, and coding the audio frame according to a modified linear predictive parameter of the audio frame. According to the present disclosure, audio having a wider bandwidth can be coded while a bit rate remains unchanged or a bit rate slightly changes and a spectrum between audio frames is steadier.
-
公开(公告)号：US20190267015A1
公开(公告)日：2019-08-29
申请号：US16409290
申请日：2019-05-10
Applicant: Huawei Technologies Co., Ltd.
IPC: 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.
-
-
-
-
-
-
-
-
-
Search Results
238
records
(took 0.036 seconds)
