AUDIO DECODING APPARATUS AND DECODING METHOD AND PROGRAM
摘要
An energy corrector (105) for correcting a target energy for high- frequency components and a corrective coefficient calculator (106) for calculating an energy corrective coefficient from low-frequency subband signals are newly provided. These processors perform a process for correcting a target energy that is required when a band expanding process is performed on a real number only. Thus, a real subband combining filter and a real band expander which require a smaller amount of calculations can be used instead of a complex subband combining filter and a complex band expander, while maintaining a high sound-quality level, and the required amount of calculations and the apparatus scale can be reduced.
申请公布号
CA2453814(C)
申请公布日期
2010.03.09
申请号
CA20032453814
申请日期
2003.06.24
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;NEC CORPORATION