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    • 2. 发明授权
    • Method for encoding signal, and method for decoding signal
    • 信号编码方法,信号解码方法
    • US08515744B2
    • 2013-08-20
    • US13172575
    • 2011-06-29
    • Dejun ZhangLei MiaoJianfeng XuFengyan QiQing ZhangLixiong LiFuwei MaYang Gao
    • Dejun ZhangLei MiaoJianfeng XuFengyan QiQing ZhangLixiong LiFuwei MaYang Gao
    • G10L19/00
    • G10L19/09G10L19/0017H04N19/50
    • Method, apparatus, and system for encoding and decoding signals are disclosed. The encoding method includes: converting a first-domain signal into a second-domain signal; performing Linear Prediction (LP) processing and Long-Term Prediction (LTP) processing for the second-domain signal; obtaining a long-term flag according to a decision criterion; obtaining a second-domain predictive signal according to the LP processing result and the LTP processing result when the long-term flag is a first flag; or obtaining a second-domain predictive signal according to the LP processing result when the long-term flag is a second flag; converting the second-domain predictive signal into a first-domain predictive signal, calculating a first-domain predictive residual signal; and outputting a bit stream that includes the first-domain predictive residual signal. Subsequent encoding or decoding process is performed adaptively according to the long-term flag; and it is not always necessary to consider the LTP processing result, thus improving the compression performance of codec.
    • 公开了用于编码和解码信号的方法,装置和系统。 编码方法包括:将第一域信号转换为第二域信号; 对第二域信号执行线性预测(LP)处理和长期预测(LTP)处理; 根据决策标准获得长期国旗; 当长期标志是第一标志时,根据LP处理结果和LTP处理结果获得第二域预测信号; 或者当长期标志是第二标志时根据LP处理结果获得第二域预测信号; 将所述第二域预测信号转换为第一域预测信号,计算第一域预测残差信号; 并输出包括第一域预测残差信号的比特流。 随后的编码或解码过程根据长期标志自适应地执行; 并不总是需要考虑LTP处理结果,从而提高了编解码器的压缩性能。
    • 6. 发明授权
    • Preprocessing method, preprocessing apparatus and coding device
    • 预处理方法,预处理装置和编码装置
    • US08566085B2
    • 2013-10-22
    • US12724066
    • 2010-03-15
    • Lei MiaoFengyan QiJianfeng XuDejun ZhangQing Zhang
    • Lei MiaoFengyan QiJianfeng XuDejun ZhangQing Zhang
    • G10L19/00
    • G10L21/06G10L19/06G10L19/09G10L19/18
    • The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.
    • 本公开涉及编码和解码技术,并且公开了一种预处理方法,预处理装置和编码装置。 预处理方法包括:获得当前帧信号的特征信息; 识别当前帧信号是否不需要根据当前帧信号和预设信息的特征信息去除LTC的编码操作; 并且如果识别出当前帧信号不需要去除LTC的编码操作,则执行去除当前帧信号的STC的编码操作; 并且如果识别当前帧信号需要去除LTC的编码操作,则执行去除当前帧信号的LTC和STC的编码操作。 通过本文提供的技术方案,仅对部分输入帧信号执行去除LTC的编码操作。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR OBTAINING PITCH GAIN, AND CODER AND DECODER
    • 用于获取增益的方法和装置,以及编码器和解码器
    • US20110218800A1
    • 2011-09-08
    • US13109679
    • 2011-05-17
    • Dejun ZhangLei MiaoJianfeng XuFengyan QiQing ZhangLixiong LiFuwei Ma
    • Dejun ZhangLei MiaoJianfeng XuFengyan QiQing ZhangLixiong LiFuwei Ma
    • G10L21/00
    • G10L19/08G10L2019/0011
    • The present invention relates to a method and apparatus for obtaining a pitch gain, and a coder and a decoder. The method includes: obtaining information about an input signal; and obtaining a pitch gain corresponding to the information about the input signal according to the correspondence between the signal information and the pitch gain. The embodiments of the present invention obtain the corresponding pitch gain according to the signal information by using the obtained correspondence between the signal information and the pitch gain, and the pitch gain is applicable to the coder and the decoder, thus making it unnecessary for the coder to transmit the pitch gain to the decoder and solving the problem of bit overhead. The embodiments of the present invention determine the pitch gain adaptively according to the signal information, avoid consumption of extra bits for quantizing the pitch gain, avoid impact on the coding performance, and improve the compression ratio.
    • 本发明涉及一种用于获得音调增益的方法和装置,以及编码器和解码器。 该方法包括:获取关于输入信号的信息; 并且根据信号信息和音调增益之间的对应关系,获得与输入信号有关的信息对应的音调增益。 本发明的实施例通过使用获得的信号信息和音调增益之间的对应关系,根据信号信息获得相应的音调增益,并且音调增益可应用于编码器和解码器,从而不需要编码器 将音调增益发送到解码器并解决位开销的问题。 本发明的实施例根据信号信息自适应地确定音调增益,避免消耗用于量化音调增益的额外比特,避免对编码性能的影响,并提高压缩比。