International Journal of Computer Science Issues

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In present mobile communication system, low bit rate audio signal is supposed to be provided with high quality. This paper researches the mechanism exists of perceptual and statistics redundancy in spatial cues and establishes a selection model by joint perceptual and statistics characteristic of spatial cues. It does not quantize the values of spatial cues where the frequency bands cant easily be perceived by human ears according to the selection model. Experimental results showed that this method can bring down the parametric bitrate by about 15% compared with parametric stereo, while maintaining the subjective sound quality.