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1. 发明申请

US20090063158A1 EFFICIENT AUDIO CODING USING SIGNAL PROPERTIES 审中-公开
标题翻译：使用信号特性的高效音频编码
公开(公告)号：US20090063158A1
公开(公告)日：2009-03-05
申请号：US11718242
申请日：2005-11-02
申请人： Tor Johan Fredrik Norden , Soren Vang Andersen , Soren Holdt Jensen , Willem Bastiaan Kleijn , Nicolle Hanneke Van Schijndel
发明人： Tor Johan Fredrik Norden , Soren Vang Andersen , Soren Holdt Jensen , Willem Bastiaan Kleijn , Nicolle Hanneke Van Schijndel
IPC分类号： G10L19/00
CPC分类号： G10L19/18
摘要： An audio encoder comprising optimizing means ET OPT adapted to generate an optimized encoding template OET based on properties PV of an input audio signal IN, such as in form of a property vector. The optimized encoding template OET is being optimized with respect to a predetermined encoding efficiency criterion. Encoding means ENC then generates an encoded audio signal OUT in accordance with the optimized encoding template OET. The audio encoder may comprise analyzing means AN adapted to generate the set of input signal properties PV based of the input signal IN. In a preferred embodiment the optimizing means ET OPT is adapted to estimate a resulting distortion associated with an encoding template. The optimizing means ET OPT may further be able to estimate bit rate associated with an encoding template. In one embodiment the optimizing means ET OPT is adapted to optimize a bit rate distribution to a number of sub-encoders based on the input signal properties (PV). In another embodiment, the optimizing means ET OPT is adapted to up-front decide on an adaptive segmentation based on the input signal properties (PV). The encoders according to the invention are advantageous in that complex processes of a plurality of encodings prior to deciding upon an optimized encoding template OET can be avoided since the optimal encoding template OET is found based on input signal properties (PV).
摘要翻译：一种音频编码器，包括优化装置ET OPT，其适于基于输入音频信号IN的属性PV（例如以属性向量的形式）生成优化的编码模板OET。优化的编码模板OET正在针对预定的编码效率标准进行优化。编码意味着ENC根据优化的编码模板OET生成编码音频信号OUT。音频编码器可以包括适于基于输入信号IN产生一组输入信号特性PV的分析装置AN。在优选实施例中，优化装置ET OPT适于估计与编码模板相关联的结果失真。优化装置ET OPT还可以能够估计与编码模板相关联的比特率。在一个实施例中，优化装置ET OPT适于基于输入信号特性（PV）来优化对多个子编码器的比特率分布。在另一个实施例中，优化装置ET OPT适于根据输入信号特性（PV）预先决定自适应分段。根据本发明的编码器是有利的，因为可以避免在决定优化的编码模板OET之前的多个编码的复杂过程，因为基于输入信号属性（PV）找到最佳编码模板OET。

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