发明名称 Audio signal compression and decoding using band division and polynomial approximation
摘要 When encoding an audio signal, it is possible to efficiently encode the audio signal while maintaining high register signal components, and prevent deterioration of sound quality of decoded signal. A digital audio signal is divided into a plurality of frequency bands. The digital audio signal having been divided into each band is function-approximated for each divided band. Further, parameters of function having been function-approximated are encoded. When performing decoding process, parameters of the function of each band are used to perform function interpolation, synthesize the function-interpolated signal of each band interpolated, and decode the signal. Thus, when function-approximating each band, by suitably setting the function equation, it is possible to perform an encoding process while maintaining the high register components and perform a compression-coding process which enables reproduction with very good sound quality.
申请公布号 US8666733(B2) 申请公布日期 2014.03.04
申请号 US20090997252 申请日期 2009.06.03
申请人 TORAICHI KAZUO;NAKAMURA MITSUTERU;MOROOKA YASUO;JAPAN SCIENCE AND TECHNOLOGY AGENCY 发明人 TORAICHI KAZUO;NAKAMURA MITSUTERU;MOROOKA YASUO
分类号 G10L21/00;G10L19/00;G10L19/02;G10L25/90 主分类号 G10L21/00
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