发明名称 |
EFFIZIENTE UND SKALIERBARE PARAMETRISCHE STEREOCODIERUNG FÜR ANWENDUNGEN MIT NIEDRIGER BITRATE |
摘要 |
The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described. |
申请公布号 |
AT305715(T) |
申请公布日期 |
2005.10.15 |
申请号 |
AT20020741611T |
申请日期 |
2002.07.10 |
申请人 |
CODING TECHNOLOGIES AB |
发明人 |
HENN, FREDRIK;KJOERLING, KRISTOFER;LILJERYD, LARS GUSTAF;ROED N, JONAS;ENGDEGARD, JONAS |
分类号 |
G10L19/008;G10L19/02;G10L19/14;G10L19/24;H04S;H04S1/00;H04S3/00;H04S5/00;(IPC1-7):H04S5/00;H04H5/00;H04B1/00 |
主分类号 |
G10L19/008 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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