发明授权
- 专利标题: Coding device and method, and recording medium
- 专利标题(中): 编码装置和方法以及记录介质
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申请号: US10145831申请日: 2002-05-14
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公开(公告)号: US07330555B2公开(公告)日: 2008-02-12
- 发明人: Shiro Suzuki
- 申请人: Shiro Suzuki
- 申请人地址: JP Tokyo
- 专利权人: Sony Corporation
- 当前专利权人: Sony Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Sonnenschein Nath & Rosenthal LLP
- 优先权: JPP2001-150042 20010518
- 主分类号: H04B1/00
- IPC分类号: H04B1/00 ; H04B14/04 ; H04B14/06 ; H04R5/00 ; G10L19/00 ; G10L21/00
摘要:
An L-channel signal and an R-channel signal are input into a subtractor in which the difference between the L-channel signal and the R-channel signal is determined. The resulting signal is input into first and second multipliers. In the first multiplier, a mixed output signal is generated by using the channel mixture ratio calculated in a previous frame. In the second multiplier, a mixed output signal is generated by using the channel mixture ratio calculated in a current frame. The mixed output signals from the first and second multipliers respectively undergo spectrum transform in first and second spectrum transformers, and quantized in first and second quantizers. A comparator compares a quantization error in the first quantizer with that in the second quantizer. If the quantization error in the second quantizer is greater than that in the first quantizer by a predetermined factor, the comparator controls a switch to select the output of the first quantizer.
公开/授权文献
- US20020198615A1 Coding device and method, and recording medium 公开/授权日:2002-12-26