AUDIO DECODING APPARATUS AND AUDIO DECODING METHOD BASED ON SPECTRAL BAND REPLICTION
摘要
A wideband, high quality audio signal is decoded with few calculations at a low bitrate. Unwanted spectrum components accompanying sinusoidal signal injection by a synthesis subband filter built with real-value operations are suppressed by inserting a suppression signal to subbands adjacent to the subband to which the sine wave is injected. This makes it possible to inject a desired sinusoid with few calculations.
申请公布号
CA2464408(A1)
申请公布日期
2004.02.12
申请号
CA20032464408
申请日期
2003.07.30
申请人
NEC CORPORATION;MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人
NORIMATSU, TAKESHI;NOMURA, TOSHIYUKI;KUAH, KIM HANN;NEO, SUA HONG;SHIMADA, OSAMU;CHONG, KOK SENG;TAKAMIZAWA, YUICHIRO;SERIZAWA, MASAHIRO;TSUSHIMA, MINEO;TANAKA, NAOYA