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1. 发明申请

US20100121646A1 CODING/DECODING OF DIGITAL AUDIO SIGNALS 有权
标题翻译：数字音频信号的编码/解码
公开(公告)号：US20100121646A1
公开(公告)日：2010-05-13
申请号：US12524774
申请日：2008-01-30
申请人： Stéphane Ragot , Cyril Gukllaume
发明人： Stéphane Ragot , Cyril Gukllaume
IPC分类号： G10L19/02
CPC分类号： G10L19/0204 , G10L19/002 , G10L19/0212 , G10L19/038 , G10L19/24
摘要： The invention relates to the coding/decoding of a signal into several sub-bands, in which at least a first and a second sub-bands which are adjacent are transform coded (601, 602). In particular, in order to apply a perceptual weighting, in the transformed domain, to at least the second sub-band, the method comprises:—determining at least one frequency masking threshold (606) to be applied on the second sub-band; and normalizing said masking threshold in order to provide a spectral continuity between the above-mentioned first and second sub-bands. An advantageous application of the invention involves a perceptual weighting of the high-frequency band in the TDAC transform coding of a hierarchical encoder according to standard G.729.1.
摘要翻译：本发明涉及将信号编码/解码成几个子带，其中相邻的至少第一和第二子带被变换编码（601,602）。具体地，为了将变换后的域中的感知加权应用到至少第二子带，该方法包括： - 确定要应用于第二子带的至少一个频率屏蔽阈值（606）; 以及归一化所述屏蔽阈值，以便提供上述第一和第二子带之间的频谱连续性。本发明的有利应用涉及根据标准G.729.1的分级编码器的TDAC变换编码中的高频带的感知加权。

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