发明公开
EP1157374A2 ENHANCING PERCEPTUAL PERFORMANCE OF SBR AND RELATED HFR CODING METHODS BY ADAPTIVE NOISE-FLOOR ADDITION AND NOISE SUBSTITUTION LIMITING
有权
主观SBR（谱带复制）及HFR（高频重建）质量的提高编码BY添加杂色从地面和限制噪声替代
- 专利标题： ENHANCING PERCEPTUAL PERFORMANCE OF SBR AND RELATED HFR CODING METHODS BY ADAPTIVE NOISE-FLOOR ADDITION AND NOISE SUBSTITUTION LIMITING
- 专利标题（中）： 主观SBR（谱带复制）及HFR（高频重建）质量的提高编码BY添加杂色从地面和限制噪声替代
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申请号： EP00904174.0申请日： 2000-01-26
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公开(公告)号： EP1157374A2公开(公告)日： 2001-11-28
- 发明人: LILJERYD, Lars, Gustaf , KJÖRLING, Kristofer , EKSTRAND, Per , HENN, Fredrik
- 申请人： Liljeryd, lars, Gustaf
- 申请人地址： Vintervagen 19, 171 34 Solna SE
- 专利权人： Liljeryd, lars, Gustaf
- 当前专利权人： Liljeryd, lars, Gustaf
- 当前专利权人地址： Vintervagen 19, 171 34 Solna SE
- 代理机构： Örtenblad, Bertil Tore
- 优先权： SE9900256 19990127; SE9903553 19991001
- 国际公布： WO0045379 20000803
- 主分类号： G10L19/00
- IPC分类号： G10L19/00
摘要：
The present proposes new methods and an apparatus for enhancement of source coding systems utilising high frequency reconstruction (HFR). It addresses the problem of insufficient noise contents in a reconstructed highband, by Adaptive Noise-floor Addition. It also introduces new methods for enhanced performance by means of limiting unwanted noise, interpolation and smoothing of envelope adjustment amplification factors. The present invention is applicable to both speech coding and natural audio coding systems.
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