发明名称 |
METHOD AND SYSTEM FOR PITCH CONTOUR QUANTIZATION IN AUDIO CODING |
摘要 |
A method and device for improving coding efficiency in audio coding. From the pitch values of a pitch contour of an audio signal, a plurality of simplified pitch contour segments are generated to approximate the pitch contour, based on one or more pre-selected criteria. The contour segments can be linear or non-linear with each contour segment represented by a first end point and a second end point. If the contour segments are linear, then only the information regarding the end points, instead of the pitch values, are provided to a decoder for reconstructing the audio signal. The contour segment can have a fixed maximum length or a variable length, but the deviation between a contour segment and the pitch values in that segment is limited by a maximum value. |
申请公布号 |
WO2005041416(A2) |
申请公布日期 |
2005.05.06 |
申请号 |
WO2004IB03166 |
申请日期 |
2004.09.29 |
申请人 |
NOKIA CORPORATION;NOKIA INC.;RAEMOE, ANSSI;NURMINEN, JANI;HIMANEN, SAKARI;HEIKKINEN, ARI |
发明人 |
RAEMOE, ANSSI;NURMINEN, JANI;HIMANEN, SAKARI;HEIKKINEN, ARI |
分类号 |
G10L11/04;G10L19/00;G10L19/02;H03M |
主分类号 |
G10L11/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|