发明名称 |
Förbättrad spektral översättning/vikning i subbandområdet |
摘要 |
The method involves filtering a low band signal through the analysis part of a digital filter bank and obtaining a set of subband signals. A number of the subband signals are patched from consecutive channels of the filter bank to consecutive channels in the synthesis part of a digital filter bank. Each of the subband signals is patched from a channel with frequency index k to a channel with frequency index j not equal to k. The patched subband signals are adjusted in accordance to a desired spectral envelope. The adjusted subband signals are filtered through the synthesis part of a digital filter bank. An envelope adjusted and frequency translated or folded signal is obtained. An Independent claim is included for an apparatus for enhancement of source coding systems using high-frequency reconstruction techniques. |
申请公布号 |
SE0203468(D0) |
申请公布日期 |
2002.11.22 |
申请号 |
SE20020003468 |
申请日期 |
2002.11.22 |
申请人 |
CODING TECHNOLOGIES SWEDEN AB |
发明人 |
LARS GUSTAF LILJERYD;PER EKSTRAND;FREDRIK HENN;KRISTOFER KJOERLING |
分类号 |
G10L21/02;(IPC1-7):G10L19/00 |
主分类号 |
G10L21/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|