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    • 11. 发明申请
    • STEREO ENCODING DEVICE, STEREO DECODING DEVICE, AND THEIR METHOD
    • 立体声编码装置,立体声解码装置及其方法
    • US20100100372A1
    • 2010-04-22
    • US12524453
    • 2008-01-25
    • Jiong ZhouKok Seng Chong
    • Jiong ZhouKok Seng Chong
    • G10L19/00G10L21/04
    • G10L19/008H04S1/00H04S2420/03
    • Disclosed is a stereo encoding device which can improve critical channel encoding accuracy without increasing the encoding information amount. The device includes: a monaural signal synthesis unit (101) which combines a left channel signal L(n) and a right channel signal R(n) so as to generate a monaural signal M(n); a correlation coefficient calculation unit (102) which calculates a correlation coefficient CML between M(n) and L(n) and a correlation coefficient CMR between M(n) and R(n); a critical channel judging unit (103) which decides one of the L(n) and R(n) having a smaller correlation with M(n) as the critical channel if the ratio of CML against CMR is not within a predetermined range from 90% to 111%, for example; and an ICP encoding unit (104) which performs ICP encoding by adjusting the degree of the ICP parameter of the critical channel to be higher than the degree of the ICP parameter of the non-critical channel.
    • 公开了一种可以在不增加编码信息量的情况下提高关键信道编码精度的立体声编码装置。 该装置包括:组合左声道信号L(n)和右声道信号R(n)的单声道信号合成单元(101),以便产生单声道信号M(n); 计算M(n)和L(n)之间的相关系数CML以及M(n)和R(n)之间的相关系数CMR的相关系数计算单元(102)。 如果CML与CMR的比率不在90°的预定范围内,则决定与M(n)具有较小相关性的L(n)和R(n)中的一个作为关键信道的关键信道判断单元(103) %〜111%; 以及通过将关键通道的ICP参数的程度调整为高于非关键通道的ICP参数的程度来执行ICP编码的ICP编码单元(104)。
    • 12. 发明申请
    • STEREO AUDIO ENCODING DEVICE, STEREO AUDIO DECODING DEVICE, AND METHOD THEREOF
    • 立体声音频编码装置,立体声音频解码装置及其方法
    • US20090299734A1
    • 2009-12-03
    • US12376000
    • 2007-08-02
    • Jiong ZhouKok Seng Chong
    • Jiong ZhouKok Seng Chong
    • G10L21/00
    • G10L19/008H04S1/007
    • Disclosed is a stereo audio encoding device capable of improving a spatial image of a decoded audio in stereo audio encoding. In this device, an original cross correlation calculation unit (101) calculates a mutual relationship coefficient (C1) between the original L channel signal and the original R channel signal. A stereo audio reconfiguration unit (104) subjects the inputted L channel signal and the R channel signal to encoding and decoding so as to generate an L channel reconfigured signal (L′) and an R channel reconfigured signal (R′). A reconfiguration cross correlation calculation unit (105) calculates a cross correlation coefficient (C2) between the L channel reconfigured signal (L′) and the R channel reconfigured signal (R′). A cross correlation comparison unit (106) calculates and outputs a comparison result &agr; between the cross correlation coefficient (C1) and the cross correlation coefficient (C2).
    • 公开了能够改善立体声音频编码中的解码音频的空间图像的立体声音频编码装置。 在这种装置中,原始互相关计算单元(101)计算原始L信道信号和原始R信道信号之间的相互关系系数(C1)。 立体声音频重新配置单元(104)对所输入的L信道信号和R信道信号进行编码和解码,以产生L信道重配置信号(L')和R信道重配置信号(R')。 重配置互相关计算单元计算L信道重配置信号(L')和R信道重配置信号(R')之间的互相关系数(C2)。 互相关比较单元(106)计算并输出互相关系数(C1)和互相关系数(C2)之间的比较结果α。
    • 14. 发明申请
    • STEREO AUDIO ENCODING DEVICE, STEREO AUDIO DECODING DEVICE, AND METHOD THEREOF
    • 立体声音频编码装置,立体声音频解码装置及其方法
    • US20100010811A1
    • 2010-01-14
    • US12376025
    • 2007-08-02
    • Jiong ZhouSua Hong NeoKoji YoshidaMichiyo Goto
    • Jiong ZhouSua Hong NeoKoji YoshidaMichiyo Goto
    • G10L19/00
    • G10L19/008G10L19/04
    • Disclosed is a stereo audio encoding device capable of reducing a bit rate. In this device, a stereo audio encoding unit (103) performs LPC analysis on an L channel signal and an R channel signal so as to obtain an L channel LPC coefficient and an R channel LPC coefficient. An LPC coefficient adaptive filter (105) obtains an LPC coefficient adaptive filter parameter to minimize the mean square error between the L channel LPC coefficient and the R channel LPC coefficient. An LPC coefficient reconfiguration unit (106) reconfigures the R channel LPC coefficient by using the L channel LPC coefficient and the LPC coefficient adaptive filter parameter. A route calculation unit (107) calculates a polynomial route indicating the safety of the R channel reconfigured LPC coefficient. A selection unit (108) selects and outputs the LPC coefficient adaptive filter parameter or the R channel LPC coefficient according to the safety of the R channel reconfigured LPC coefficient.
    • 公开了能够降低比特率的立体声音频编码装置。 在该装置中,立体声音频编码单元(103)对L声道信号和R声道信号执行LPC分析,以获得L声道LPC系数和R声道LPC系数。 LPC系数自适应滤波器(105)获得LPC系数自适应滤波器参数以最小化L信道LPC系数和R信道LPC系数之间的均方误差。 LPC系数重构单元(106)通过使用L信道LPC系数和LPC系数自适应滤波器参数来重新配置R信道LPC系数。 路线计算单元(107)计算表示R信道重新配置的LPC系数的安全性的多项式路由。 选择单元(108)根据R信道重新配置的LPC系数的安全性来选择并输出LPC系数自适应滤波器参数或R信道LPC系数。