| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stereo audio encoding and decoding method and device capable of bit rate adjustment. <P>SOLUTION: The method for encoding stereo audio includes the stages of converting a 1st channel audio sample and a 2nd channel audio sample; quantizing the converted 1st channel audio sample and converted 2nd channel audio sample; and encoding the quantized 1st channel audio sample up to a prescribed conversion hierarchy, and interleaving and encoding the quantized 1st channel audio sample and quantized 2nd channel audio sample while increasing an ordinal number added before a hierarchy at each time until encoding of a target hierarchy predetermined from a hierarchy after the conversion hierarchy is completed. Encoding order is converted to improve sound quality in low hierarchies, and then a monaural signal is encoded instead of a stereo signal having deteriorate d in sound quality in lower layers to obtain stable band-expanded sound quality. This method is applied to a digital audio storing/reproducing device, etc. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
