发明名称 En metod och anordning för reduktion av dataflöde baserad på harmonisk bandbreddsexpansion
摘要 The present invention proposes a new method and apparatus for the enhancement of source coding systems. The invention employs bandwidth reduction (101) prior to or in the encoder (103), followed by spectral-band replication (105) at the decoder (107). This is accomplished by the use of new transposition methods, in combination with spectral envelope adjustments. Reduced bitrate at a given perceptual quality or an improved perceptual quality at a given bitrate is offered. The invention is preferably integrated in a hardware or software codec, but can also be implemented as a separate processor in combination with a codec. The invention offers substantial improvements practically independent of codec type and technological progress. <IMAGE>
申请公布号 SE9800268(L) 申请公布日期 1998.12.11
申请号 SE19980000268 申请日期 1998.01.30
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分类号 G10L19/02;G10L19/00;G10L21/02;G10L21/038;G10L21/04;H03M7/30;H04B1/66;(IPC1-7):H04B1/66 主分类号 G10L19/02
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