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    • 4. 发明授权
    • Method, device and system for enhancement layer signal encoding and decoding
    • 用于增强层信号编码和解码的方法,装置和系统
    • US08380526B2
    • 2013-02-19
    • US13111834
    • 2011-05-19
    • Chen HuZexin LiuLei MiaoLongyin ChenQing ZhangWei XiaoHerve Marcel Taddei
    • Chen HuZexin LiuLei MiaoLongyin ChenQing ZhangWei XiaoHerve Marcel Taddei
    • G10L19/00G10L19/12
    • G10L21/00G10L19/24
    • A method, device and system for signal encoding and decoding are disclosed. The method includes: encoding a core layer signal to obtain a core layer signal code; selecting an enhancement sample point that requires enhancement layer signal encoding according to the core layer signal code and the number of bits that can be used by an enhancement layer; obtaining an enhancement layer signal code of the enhancement sample point; and outputting a bit stream, where the bit stream includes the core layer signal code and the enhancement layer signal code. In embodiments of the present invention, according to the number of bits that can be used by the enhancement layer, the enhancement sample point that requires enhancement layer signal encoding is selected; the enhancement layer signal of the selected enhancement sample point is encoded and decoded; when no sufficient bits are available for the enhancement layer, the enhancement quality of the core layer can be improved.
    • 公开了用于信号编码和解码的方法,装置和系统。 该方法包括:编码核心层信号以获得核心层信号码; 选择需要根据核心层信号码的增强层信号编码和增强层可以使用的位数的增强采样点; 获得增强采样点的增强层信号码; 并输出比特流,其中比特流包括核心层信号码和增强层信号码。 在本发明的实施例中,根据增强层可以使用的比特数,选择需要增强层信号编码的增强采样点; 所选择的增强采样点的增强层信号被编码和解码; 当没有足够的比特可用于增强层时,可以提高核心层的增强质量。
    • 5. 发明授权
    • Method and apparatus for switching speech or audio signals
    • 用于切换语音或音频信号的方法和装置
    • US08214218B2
    • 2012-07-03
    • US13162309
    • 2011-06-16
    • Zexin LiuLei MiaoChen HuWenhai WuYue LangQing Zhang
    • Zexin LiuLei MiaoChen HuWenhai WuYue LangQing Zhang
    • G10L19/00
    • G10L19/24G10L19/22G10L19/26
    • A method and an apparatus for switching speech or audio signals, wherein the method for switching speech or audio signals includes when switching of a speech or audio, weighting a first high frequency band signal of a current frame of speech or audio signal and a second high frequency band signal of the previous M frame of speech or audio signals to obtain a processed first high frequency band signal, where M is greater than or equal to 1, and synthesizing the processed first high frequency band signal and a first low frequency band signal of the current frame of speech or audio signal into a wide frequency band signal. In this way, speech or audio signals with different bandwidths can be smoothly switched, thus improving the quality of audio signals received by a user.
    • 一种用于切换语音或音频信号的方法和装置,其中用于切换语音或音频信号的方法包括:当切换语音或音频时,加权当前语音或音频信号帧的第一高频带信号, 先前的M帧语音或音频信号的频带信号,以获得经处理的第一高频带信号,其中M大于或等于1,并且合成经处理的第一高频带信号和第一低频带信号 将当前的语音帧或音频信号转换成宽频带信号。 以这种方式,可以平滑地切换具有不同带宽的语音或音频信号,从而提高用户接收的音频信号的质量。
    • 9. 发明授权
    • Method, device and system for signal encoding and decoding
    • 用于信号编码和解码的方法,装置和系统
    • US08140343B2
    • 2012-03-20
    • US13210127
    • 2011-08-15
    • Chen HuZexin LiuLei MiaoLongyin ChenQing ZhangWei XiaoHerve Marcel Taddei
    • Chen HuZexin LiuLei MiaoLongyin ChenQing ZhangWei XiaoHerve Marcel Taddei
    • G10L19/00G10L21/04
    • G10L21/00G10L19/24
    • A method, device and system for signal encoding and decoding, the method comprising: encoding a core layer signal to obtain a core layer signal code; selecting an enhancement sample point that requires enhancement layer signal encoding according to the core layer signal code and the number of bits that can be used by an enhancement layer; obtaining an enhancement layer signal code of the enhancement sample point; and outputting a bit stream, where the bit stream includes the core layer signal code and the enhancement layer signal code. In embodiments of the present invention, according to the number of bits that can be used by the enhancement layer, the enhancement sample point that requires enhancement layer signal encoding is selected; the enhancement layer signal of the selected enhancement sample point is encoded and decoded; when no sufficient bits are available for the enhancement layer, the enhancement quality of the core layer can be improved.
    • 一种用于信号编码和解码的方法,装置和系统,所述方法包括:对核心层信号进行编码以获得核心层信号码; 选择需要根据核心层信号码的增强层信号编码和增强层可以使用的位数的增强采样点; 获得增强采样点的增强层信号码; 并输出比特流,其中比特流包括核心层信号码和增强层信号码。 在本发明的实施例中,根据增强层可以使用的比特数,选择需要增强层信号编码的增强采样点; 所选择的增强采样点的增强层信号被编码和解码; 当没有足够的比特可用于增强层时,可以提高核心层的增强质量。
    • 10. 发明申请
    • SIGNAL DELAY DETECTION METHOD, DETECTION APPARATUS, CODER
    • 信号延迟检测方法,检测装置,编码器
    • US20120053714A1
    • 2012-03-01
    • US13290809
    • 2011-11-07
    • Wenhai WuLei MiaoYue LangChen HuZexin LiuQing Zhang
    • Wenhai WuLei MiaoYue LangChen HuZexin LiuQing Zhang
    • G06F17/00
    • H04S1/007H04S2420/03
    • A signal delay detection method, a detection apparatus, and a coder are disclosed to improve accuracy of detecting the signal delay. The method includes: obtaining a first cumulative cross-correlation function according to cross-correlation functions between channel signals; determining a first delay between the channel signals corresponding to the first cumulative cross-correlation function; adjusting a second cumulative cross-correlation function according to a relationship between the first delay and a second delay that exist between the channel signals, where the second delay is obtained at time of adjusting the second cumulative cross-correlation function and an initial value of the second delay is determined according to an initial value of a second weighting coefficient of the second cumulative cross-correlation function; and determining the second delay corresponding to the adjusted second cumulative cross-correlation function as a delay detected between the channel signals.
    • 公开了一种信号延迟检测方法,检测装置和编码器,以提高检测信号延迟的精度。 该方法包括:根据信道信号之间的互相关函数获得第一累积互相关函数; 确定对应于第一累积互相关函数的信道信号之间的第一延迟; 根据存在于通道信号之间的第一延迟和第二延迟之间的关系来调整第二累积互相关函数,其中在调整第二累积互相关函数时获得第二延迟和第二累积互相关函数的初始值 根据第二累积互相关函数的第二加权系数的初始值来确定第二延迟; 以及确定与所调整的第二累积互相关函数相对应的第二延迟作为在所述信道信号之间检测到的延迟。