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1.发明授权ENHANCING THE PERFORMANCE OF CODING SYSTEMS THAT USE HIGH FREQUENCY RECONSTRUCTION METHODS 有权提高编码系统，其高频重建过程中使用的性能
公开(公告)号：EP1334484B1
公开(公告)日：2004-05-19
申请号：EP01983888.7
申请日：2001-11-14
发明人： HENN, Fredrik , EHRET, Andreas , SCHUG, Michael
CPC分类号： G10L19/18 , G10L21/038
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2.发明公开ENHANCING THE PERFORMANCE OF CODING SYSTEMS THAT USE HIGH FREQUENCY RECONSTRUCTION METHODS 有权提高编码系统，其高频重建过程中使用的性能
公开(公告)号：EP1334484A1
公开(公告)日：2003-08-13
申请号：EP01983888.7
申请日：2001-11-14
发明人： HENN, Fredrik , EHRET, Andreas , SCHUG, Michael
CPC分类号： G10L19/18 , G10L21/038
摘要： The present invention relates to digital audio coding systems that employ high freuqency reconstruction (HFR) methods. It teaches how to improve the overall perforamcne of such systems, by means of an adaptation over time of the crossover frequency between the lowband coded by a core codec, and the highband coded by an HFR system. Different methods of establishing the instantaneous optimum choice of crossover frequency are introduced.
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