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公开(公告)号：US08775169B2
公开(公告)日：2014-07-08
申请号：US13725353
申请日：2012-12-21
发明人： Yang Gao
IPC分类号： G10L19/00
摘要： In an embodiment, a method of transmitting an input audio signal is disclosed. A first coding error of the input audio signal with a scalable codec having a first enhancement layer is encoded, and a second coding error is encoded using a second enhancement layer after the first enhancement layer. Encoding the second coding error includes coding fine spectrum coefficients of the second coding error to produce coded fine spectrum coefficients, and coding a spectral envelope of the second coding error to produce a coded spectral envelope. The coded fine spectrum coefficients and the coded spectral envelope are transmitted.
摘要翻译： 在一个实施例中，公开了一种发送输入音频信号的方法。 编码具有具有第一增强层的可扩展编解码器的输入音频信号的第一编码错误，并且在第一增强层之后使用第二增强层对第二编码错误进行编码。 编码第二编码误差包括对第二编码误差的精细频谱系数进行编码以产生编码的精细频谱系数，以及对第二编码误差的频谱包络进行编码以产生经编码的频谱包络。 发送编码的精细频谱系数和编码的频谱包络。
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公开(公告)号：US20230376459A1
公开(公告)日：2023-11-23
申请号：US18027035
申请日：2021-09-06
IPC分类号： G06F16/16 , G06F16/957 , G06F16/13
CPC分类号： G06F16/16 , G06F16/957 , G06F16/13
摘要： A file generation method includes obtaining first information based on a resource index file, where the resource index file comprises indexes, file names, and first path information of a plurality of resource files, where the resource files include a first resource file and a second resource file, where the first information includes second path information and a file name of a first file; loading the first file based on the first information; obtaining the first resource file and the second resource file from the first file based on second information; and displaying the first page based on the first resource file and the second resource file.
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公开(公告)号：US11715478B2
公开(公告)日：2023-08-01
申请号：US17372951
申请日：2021-07-12
发明人： Yang Gao
IPC分类号： G10L19/06 , G10L19/032
CPC分类号： G10L19/06 , G10L19/032
摘要： Methods, systems, apparatuses, and computer programs encoded on computer storage media for performing linear predictive coding (LPC) are described. At least one of a differential spectrum tilt and an energy difference between a current frame and a previous frame of the audio signal is determined. A spectral stability of the audio signal is detected based on at least one of the differential spectrum tilt and an energy difference between the current frame and the previous frame of the audio signal. In response to detecting the spectral stability of the audio signal, quantized LPC parameters for the previous frame are copied into the current frame of the audio signal.
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公开(公告)号：US20220230647A1
公开(公告)日：2022-07-21
申请号：US17667891
申请日：2022-02-09
发明人： Yang Gao , Fengyan Qi
IPC分类号： G10L21/003 , G10L25/21 , G10L25/06 , G10L25/90 , G10L19/00
摘要： A method includes detecting whether there is a very short pitch lag in a speech or audio signal that is shorter than a conventional minimum pitch limitation using a combination of time domain and frequency domain pitch detection techniques. The pitch detection techniques include using pitch correlations in a time domain and detecting a lack of low frequency energy in the speech or audio signal in a frequency domain. The detected very short pitch lag is coded using a pitch range from a predetermined minimum very short pitch limitation that is smaller than the conventional minimum pitch limitation.
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公开(公告)号：US10249313B2
公开(公告)日：2019-04-02
申请号：US15491181
申请日：2017-04-19
发明人： Yang Gao
摘要： A method of decoding an encoded audio bitstream and generating frequency bandwidth extension is disclosed. The method includes decoding the audio bitstream to produce a decoded low band audio signal and generate a low band excitation spectrum corresponding to a low frequency band. A sub-band area is identified within the low frequency band using a parameter which indicates energy information of a low band spectral envelope. A high band excitation spectrum is generated for a high frequency band by copying a sub-band excitation spectrum from the identified sub-band area to a high sub-band area corresponding to the high frequency band. Using the generated high band excitation spectrum, an extended high band audio signal is generated by applying a high band spectral envelope. The extended high band audio signal is added to the decoded low band audio signal to generate an audio output signal having an extended frequency bandwidth.
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公开(公告)号：US10128910B2
公开(公告)日：2018-11-13
申请号：US15567844
申请日：2015-05-15
发明人： Zhonghui Peng , Heng Wang , Yonggang Wang , Dongjin Chen , Yang Gao
IPC分类号： H04B5/00 , H04B1/3816
摘要： A mobile device with the NFC function includes an NFC chip, multiple SIM card slots, a power supply unit, and an eSE integrated into the NFC chip. One SIM card slot is connected to a first power port on the NFC chip. The power supply unit is connected to a second power port on the NFC chip. When the mobile device performs near field communication, the second power port on the NFC chip is triggered to output a first level signal. Each of the rest SIM card slots is connected to the power supply unit. The eSE is connected to the power supply unit. The power supply unit is configured to supply power to the eSE and the SIM card slot that is connected to the power supply unit, when the first level signal is received.
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公开(公告)号：US20180012606A1
公开(公告)日：2018-01-11
申请号：US15677027
申请日：2017-08-15
发明人： Yang Gao
IPC分类号： G10L19/005 , G10L19/083 , G10L19/09 , G10L19/22
CPC分类号： G10L19/005 , G10L19/083 , G10L19/09 , G10L19/22
摘要： A speech coding method of reducing error propagation due to voice packet loss, is achieved by limiting or reducing a pitch gain only for the first subframe or the first two subframes within a speech frame, the excitation of a next frame is obtained according to the reduced or limited pitch gain value of the first subframe, and the next frame is encoded according to the obtained excitation. The method is used for a voiced speech class.
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公开(公告)号：US09685166B2
公开(公告)日：2017-06-20
申请号：US14511943
申请日：2014-10-10
发明人： Yang Gao
IPC分类号： G10L21/00 , G10L19/125 , G10L19/22
CPC分类号： G10L19/125 , G10L19/002 , G10L19/22 , G10L2019/0002 , G10L2019/0011 , G10L2019/0016
摘要： A method for processing speech signals prior to encoding a digital signal comprising audio data includes selecting frequency domain coding or time domain coding based on a coding bit rate to be used for coding the digital signal and a short pitch lag detection of the digital signal.
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公开(公告)号：US09672835B2
公开(公告)日：2017-06-06
申请号：US14687689
申请日：2015-04-15
发明人： Yang Gao
IPC分类号： G10L19/00 , G10L19/025 , G10L19/022 , G10L19/22
CPC分类号： G10L19/025 , G10L19/022 , G10L19/22
摘要： Low bit rate audio coding such as BWE algorithm often encounters conflict goal of achieving high time resolution and high frequency resolution at the same time. In order to achieve best possible quality, input signal can be first classified into fast signal and slow signal. This invention focuses on classifying signal into fast signal and slow signal, based on at least one of the following parameters or a combination of the following parameters: spectral sharpness, temporal sharpness, pitch correlation (pitch gain), and/or spectral envelope variation. This classification information can help to choose different BWE algorithms, different coding algorithms, and different post-processing algorithms respectively for fast signal and slow signal.
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公开(公告)号：US09666202B2
公开(公告)日：2017-05-30
申请号：US14478839
申请日：2014-09-05
发明人： Yang Gao
IPC分类号： G10L19/12 , G10L21/038 , G10L19/08 , G10L19/02
CPC分类号： G10L19/22 , G10L19/0204 , G10L19/08 , G10L19/12 , G10L19/167 , G10L19/265 , G10L21/038
摘要： In one embodiment of the present invention, a method of decoding an encoded audio bitstream and generating frequency bandwidth extension includes decoding the audio bitstream to produce a decoded low band audio signal and generate a low band excitation spectrum corresponding to a low frequency band. A sub-band area is selected from within the low frequency band using a parameter which indicates energy information of a spectral envelope of the decoded low band audio signal. A high band excitation spectrum is generated for a high frequency band by copying a sub-band excitation spectrum from the selected sub-band area to a high sub-band area corresponding to the high frequency band. Using the generated high band excitation spectrum, an extended high band audio signal is generated by applying a high band spectral envelope. The extended high band audio signal is added to the decoded low band audio signal to generate an audio output signal having an extended frequency bandwidth.
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