- 专利标题: CODING DEVICE, DECODING DEVICE, AND METHOD AND PROGRAM THEREOF
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申请号: US17370060申请日: 2021-07-08
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公开(公告)号: US20210335375A1公开(公告)日: 2021-10-28
- 发明人: Takehiro MORIYA , Yutaka KAMAMOTO , Noboru HARADA
- 申请人: Nippon Telegraph and Telephone Corporation
- 申请人地址: JP Chiyoda-ku
- 专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人: Nippon Telegraph and Telephone Corporation
- 当前专利权人地址: JP Chiyoda-ku
- 优先权: JP2014-094758 20140501
- 主分类号: G10L19/07
- IPC分类号: G10L19/07 ; G10L19/038
摘要:
A coding method and a decoding method are provided which can use in combination a predictive coding and decoding method which is a coding and decoding method that can accurately express coefficients which are convertible into linear prediction coefficients with a small code amount and a coding and decoding method that can obtain correctly, by decoding, coefficients which are convertible into linear prediction coefficients of the present frame if a linear prediction coefficient code of the present frame is correctly input to a decoding device. A coding device includes: a predictive coding unit that obtains a first code by coding a differential vector formed of differentials between a vector of coefficients which are convertible into linear prediction coefficients of more than one order of the present frame and a prediction vector containing at least a predicted vector from a past frame, and obtains a quantization differential vector corresponding to the first code; and a non-predictive coding unit that generates a second code by coding a correction vector which is formed of differentials between the vector of the coefficients which are convertible into the linear prediction coefficients of more than one order of the present frame and the quantization differential vector or formed of some of elements of the differentials.