发明名称 |
Block size determination and adaptation method for audio transform coding |
摘要 |
A method for identifying and categorizing an audio signal into subclasses to determine a subframe block size of a transform coder. A number of block sizes available for the transform coder is determined. An input audio signal is then sampled at predetermined time intervals to produce a plurality of samples, which are grouped into frames, in which each frame has an equal number of samples. The frames are analyzed in a time domain to produce at least one comparison index, after which an appropriate block size is selected for the transform coder.
|
申请公布号 |
US6424936(B1) |
申请公布日期 |
2002.07.23 |
申请号 |
US19990427592 |
申请日期 |
1999.10.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SHEN SHENG MEI;NEO SUA HONG;TAN AH PENG |
分类号 |
G10L19/00;G10L19/02;H03M7/30;H04B1/66;(IPC1-7):G10L21/04 |
主分类号 |
G10L19/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|