公开(公告)号：US20120265542A1

公开(公告)日：2012-10-18

申请号：US13502319

申请日：2010-10-15

Applicant: Balazs Kovesi ,  Stephane Ragot ,  Thi Minh Nguyet Hoang

Inventor： Balazs Kovesi ,  Stephane Ragot ,  Thi Minh Nguyet Hoang

IPC: G10L19/00

CPC classification number: G10L19/008

Abstract: A method and decoder are provided for parametrically decoding a stereo digital audio signal. The method includes synthesizing the stereo signal, per frequency sub-band, on the basis of a decoded mono signal ({circumflex over (M)}[j]), arising from a downmix of the stereo signal and from spatial information parameters of the stereo signal, in such a way that the signals obtained have the following form: L ^  [ j ] = c 1  [ j ] · M ^ 1  [ j ] R ^  [ j ] = c 2  [ j ] · M ^ 2  [ j ] , with {circumflex over (L)}[j] and {circumflex over (R)}[j] being channels of the synthesized signal, {circumflex over (M)}1[j] and {circumflex over (M)}2[j] being signals that are a function of the decoded mono signal and c1[j], c2[j] being gains, wherein the gains are calculated as follows: c 1  [ j ] = 2  I ^  [ j ] I ^  [ j ] + 1 c 2  [ j ] = 2 I ^  [ j ] + 1 with Î[j] being an amplitude ratio between the two channels of the stereo signal, obtained from the decoded parameters.

Abstract translation: 提供了一种用于对立体声数字音频信号进行参数解码的方法和解码器。 该方法包括：基于由立体声信号的下混合产生的解码单声道信号（{回旋（M）} [j]），从每个频率子带合成立体声信号，并根据 立体声信号，使得获得的信号具有以下形式：L ^ [j] = c 1 [j]·M ^ 1 [j] R ^ [j] = c 2 [j] （M）} 1 [j]中的{回旋（L）} [j]和{convflex over（R）} [j]是合成信号的通道， 2（j）是作为解码单声道信号的函数的信号，c1 [j]，c2 [j]是增益，其中增益计算如下：c 1 [j] = [j] + 1 c 2 [j] = 2 I ^ [j] + 1，其中Î[j]是立体声信号的两个声道之间的振幅比， 从解码参数获得。

公开(公告)号：US20110116542A1

公开(公告)日：2011-05-19

申请号：US12674885

申请日：2008-07-25

Applicant: Marie Oger ,  Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Marc Antonini

Inventor： Marie Oger ,  Thi Minh Nguyet Hoang ,  Stephane Ragot ,  Marc Antonini

IPC: H04B1/66

CPC classification number: H03M7/30 ,  G10L19/00 ,  H03M7/4006 ,  H04N19/13 ,  H04N19/184

Abstract: The invention relates to an arithmetic encoding by bit planes (MSB, . . . , LSB), that comprises using tables of probability to have a 0 or 1 bit for encoding each bit plane. According to an embodiment of the invention, the probability tables are calculated dynamically for each signal frame based on a probability density model (Mod) corresponding to the distribution (H) of the signal (X) on each frame.

Abstract translation: 本发明涉及通过位平面（MSB，...，LSB）的算术编码，其包括使用概率表具有用于编码每个位平面的0或1位。 根据本发明的实施例，基于与每个帧上的信号（X）的分布（H）相对应的概率密度模型（Mod），针对每个信号帧动态地计算概率表。

公开(公告)号：US20100228808A1

公开(公告)日：2010-09-09

申请号：US12225312

申请日：2007-03-09

Applicant: Stephane Ragot ,  Cyril Guillaume

Inventor： Stephane Ragot ,  Cyril Guillaume

IPC: G06F17/16

CPC classification number: H03M7/3082 ,  H04N19/94

Abstract: The invention relates to a method for generating a dictionary for the vector quantisation of a signal. Said method comprises a step (10) of the statistical analysis of driving vectors representing the signal determining a finished set of code vectors (CITER) representing said driving vectors. The inventive method is characterised in that it also comprises a step (3) of modifying the finished set of code vectors in order to impose a minimum distance between the code vectors modified two-by-two, the set of said modified code vectors forming the dictionary.

Abstract translation: 本发明涉及一种用于生成信号矢量量化的字典的方法。 所述方法包括对表示确定表示所述驾驶向量的最终代码矢量集合（CITER）的信号的驱动矢量的统计分析的步骤（10）。 本发明的方法的特征在于它还包括一个步骤（3），修改完成的一组代码矢量，以便施加两个二进制修改的代码矢量之间的最小距离，所述修改的代码矢量的集合形成 字典。