-
公开(公告)号：US20190164562A1
公开(公告)日：2019-05-30
申请号：US16263837
申请日：2019-01-31
Applicant: Huawei Technologies Co., Ltd.
Abstract: An audio encoding method and a related apparatus, where the audio coding method includes obtaining an audio signal, obtaining some subband parameters of a current frame of the audio signal, and encoding the current frame using a high quality transform coding (HQ) algorithm based on the obtained subband parameters. The audio encoding method and the related apparatus help improve encoding quality or encoding efficiency in audio signal encoding.
-
公开(公告)号：US10249315B2
公开(公告)日：2019-04-02
申请号：US15467356
申请日：2017-03-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Fengyan Qi , Lei Miao
IPC: G10L19/00 , G10L25/00 , G10L25/90 , G10L21/013 , G10L21/028
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：US20190096411A1
公开(公告)日：2019-03-28
申请号：US16201681
申请日：2018-11-27
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Haiting Li , Zexin Liu , Lei Miao
IPC: G10L19/008
Abstract: An inter-channel phase difference (IPD) parameter extraction method and apparatus, where the extraction method includes obtaining a parameter 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 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.
-
公开(公告)号：US10186272B2
公开(公告)日：2019-01-22
申请号：US15481306
申请日：2017-04-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/038 , G10L19/07 , G10L21/0388 , G10L19/087 , G10L19/12 , G10L25/90 , G10L19/00
Abstract: The present invention provides a bandwidth extension method and apparatus. The method includes: acquiring a bandwidth extension parameter, where the bandwidth extension parameter includes one or more of the following parameters: a linear predictive coefficient (LPC), a line spectral frequency (LSF) parameter, a pitch period, a decoding rate, an adaptive codebook contribution, and an algebraic codebook contribution; and performing, according to the bandwidth extension parameter, bandwidth extension on a decoded low frequency band signal, to obtain a high frequency band signal. The high frequency band signal recovered by using the bandwidth extension method and apparatus in the embodiments of the present invention is close to an original high frequency band signal, and the quality is satisfactory.
-
公开(公告)号：US10186271B2
公开(公告)日：2019-01-22
申请号：US15686175
申请日：2017-08-25
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L19/02 , G10L19/002
Abstract: Present disclosure pertains to an audio signal processing method and device. A current frame of a frequency-domain audio signal has N frequency sub-bands. According to an energy attribute and a spectral attribute of a first subset of M sub-bands, whether to adjust envelope values of the M sub-bands is determined. Based on a determination that the energy envelope values of the M sub-bands need to be adjusted, the energy envelope values of the M sub-bands are modified individually to obtain modified envelope values of the M sub-bands. Encoding bits are allocated to each of the N sub-bands according to the adjusted envelope values of the M sub-bands and energy envelope information of K sub-bands of a second subset. The first subset and the second subset have no overlap in frequency, and N=M+K.
-
Patent Agency Ranking
公开(公告)号：US20180336910A1
公开(公告)日：2018-11-22
申请号：US16051139
申请日：2018-07-31
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
IPC: G10L19/26 , G10L19/18 , G10L19/012 , G10L19/22
CPC classification number: G10L19/265 , G10L19/012 , G10L19/18 , G10L19/22
Abstract: The present disclosure provides a speech/audio signal processing method based on wideband switching and a coding apparatus. The method includes: if a first wideband speech/audio signal is a harmonic signal, adjusting a determining condition for determining that a second wideband speech/audio signal is a harmonic signal, to obtain a first determining condition, where the first wideband speech/audio signal is a signal before wideband switching, and the second wideband speech/audio signal is a signal after the wideband switching; and determining, according to the first determining condition, whether the second wideband speech/audio signal is a harmonic signal. In the case of wideband switching, signal types of speech/audio signals remain as consistent as possible before and after the switching, so that continuity of the speech/audio signal decoded by a decoder device is ensured as much as possible, further improving speech communication service quality.
-
公开(公告)号：US10032460B2
公开(公告)日：2018-07-24
申请号：US15715179
申请日：2017-09-26
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L21/00 , G10L19/038 , G10L19/06 , G10L19/00
CPC classification number: G10L19/038 , G10L19/06 , G10L2019/0005
Abstract: Embodiments of the present application proposes a frequency envelope vector quantization method and apparatus, where the method includes: dividing N frequency envelopes in one frame into N1 vectors; quantizing a first vector in the N1 vectors by using a first codebook, to obtain a code word corresponding to the quantized first vector, where the first codebook is divided into 2B1 portions; determining, according to the code word corresponding to the quantized first vector; determining a second codebook according to the codebook of the ith portion; and quantizing a second vector in the N1 vectors based on the second codebook. In the embodiments of the present application, vector quantization can be performed on frequency envelope vectors by using a codebook with a smaller quantity of bits. Therefore, complexity of vector quantization can be reduced, and an effect of vector quantization can also be ensured.
-
公开(公告)号：US10008211B2
公开(公告)日：2018-06-26
申请号：US15154655
申请日：2016-05-13
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xingtao Zhang , Lei Miao , Wenhai Wu
IPC: H04B15/00 , G10L19/008
CPC classification number: G10L19/008
Abstract: Present disclosure discloses a method and an apparatus for encoding a stereo phase parameter, which relate to the field of information technologies and can improve an effect of stereo audio phase information. The method includes: first, acquiring a global stereo phase parameter of a current frame; then, determining a value of the global stereo phase parameter of the current frame, and adjusting the value of the global stereo phase parameter of the current frame according to a determining result of the value of the global stereo phase parameter of the current frame; and finally, encoding an adjusted value of the global stereo phase parameter of the current frame. The embodiments of the present disclosure are applicable to recovering stereo phase information.
-
公开(公告)号：US20170372715A1
公开(公告)日：2017-12-28
申请号：US15696591
申请日：2017-09-06
Applicant: HUAWEI TECHNOLOGIES CO.,LTD.
CPC classification number: G10L19/12 , G10L19/0204 , G10L19/0208 , G10L19/26
Abstract: Embodiments of the present application provide a coding/decoding method, apparatus, and system. According to the coding method, de-emphasis processing is performed on a full band signal by using a de-emphasis parameter determined according to a characteristic factor of an input audio signal, and then the full band signal is coded and sent to a decoder, so that the decoder performs corresponding de-emphasis decoding processing on the full band signal according to the characteristic factor of the input audio signal and restores the input audio signal. This resolves a prior-art problem that an audio signal restored by a decoder is apt to have signal distortion, and implements adaptive de-emphasis processing on the full band signal according to the characteristic factor of the audio signal to enhance coding performance, so that the input audio signal restored by the decoder has relatively high fidelity and is closer to an original signal.
-
公开(公告)号：US09799343B2
公开(公告)日：2017-10-24
申请号：US15372130
申请日：2016-12-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
IPC: G10L19/00 , G10L21/00 , G10L19/022 , G10L19/135 , G10L19/20 , G10L25/45 , G10L21/038 , G10L19/032 , G10L19/12
CPC classification number: G10L19/022 , G10L19/032 , G10L19/12 , G10L19/135 , G10L19/20 , G10L21/038 , G10L25/45
Abstract: A method and an apparatus for processing a temporal envelope of an audio signal, and an encoder are disclosed. When multiple temporal envelopes are solved, continuity of signal energy can be well maintained, and in addition, complexity of calculating a temporal envelope is reduced. The method includes: obtaining a high-band signal of the current frame audio signal according to the received current frame audio signal; dividing the high-band signal of the current frame signal into M subframes according to a predetermined temporal envelope quantity M, where M is an integer, M is greater than or equal to 2; calculating a temporal envelope of each of the subframes; performing windowing on the first subframe of the M subframes and the last subframe of the M subframes by using an asymmetric window function; and performing windowing on a subframe except the first subframe and the last subframe of the M subframes.
-
-
-
-
-
-
-
-
-
Search Results
299
records
(took 0.031 seconds)
