To provide a decoding device capable of easily generating a substitute signal with little unconformity in a case of error occurrence while decoding operation.
A correlation calculator 20 calculates a correlation between waveform elements of a last block before an error block in which an error has occurred during decoding operation and waveform elements of a block which proceeds by n blocks therefrom. An evaluation calculator 21 calculates a basic cycle of n0/m of the error block on block basis based on the correlation. A gain controller 23 generates substitute waveform elements for the error block by using the waveform elements of a block which proceeds by basic cycle n0/m on block basis from the error block based on the basic cycle n0/m on block basis. The invention is applicable to, for example, a decoding device for audio signals.
MATSUMOTO ATSUSHI
TOKURI YASUHIRO
SUZUKI SHIRO
MATSUMURA YUKI
| JPH01219621A | 1989-09-01 | |||
| JP2011521290A | 2011-07-21 | |||
| JP2009003387A | 2009-01-08 | |||
| JP2006526177A | 2006-11-16 | |||
| JP2004361731A | 2004-12-24 |
| WO2009140870A1 | 2009-11-26 | |||
| WO2008146466A1 | 2008-12-04 |
JPN6014000830; '"Ａ ｈｉｇｈ ｑｕａｌｉｔｙ ｌｏｗ-ｃｏｍｐｌｅｘｉｔｙ ａｌｇｏｒｉｔｈｍ ｆｏｒ ｐａｃｋｅｔ ｌｏｓｓ ｃｏｎｃｅａｌｍｅｎｔ ｗｉｔｈ Ｇ．７１１"' ＩＴＵ-Ｔ Ｒｅｃｏｍｍｅｎｄａｔｉｏｎ Ｇ．７１１ - Ａｐｐｅｎｄｉｘ Ｉ , 199909, ｐｐ．１-１８, ＩＮＴＥＲＮＡＴＩＯＮＡＬ ＴＥＬＥＣＯＭＭＵＮＩＣＡＴＩＯＮ ＵＮＩＯＮ
CSNG200501395006; 青木直史: '"波形複製におけるピッチ変動を考慮したＶｏＩＰにおけるパケット損の一隠ぺい法"' 電子情報通信学会論文誌 Ｖｏｌ．Ｊ８８-Ｂ，Ｎｏ．５, 200505, ｐｐ．９１３-９２０
Takashi Nishikawa