发明名称 |
Multi-rate digital filter for audio sample-rate conversion |
摘要 |
A method for providing a sample-rate conversion ("SRC") filter on an input stream of sampled data provided at a first rate, to produce an output stream of data at a second rate different from the first rate. The input stream of sampled data is operated on with a first low-order interpolation filter routine to produce a first stream of intermediate data. The first stream of intermediate data is operated on with a first simplified interpolation filter routine, having a substantially small number of operations to calculate the coefficients thereof, to produce a second stream of intermediate data. The second stream of intermediate data is operated on with a first decimating filter routine to produce the output stream of data.
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申请公布号 |
US6487573(B1) |
申请公布日期 |
2002.11.26 |
申请号 |
US19990277696 |
申请日期 |
1999.03.26 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
JIANG ZHONGNONG;ALLRED RUSTIN W.;HOCHSCHILD JAMES R. |
分类号 |
H03H17/00;H03H17/02;H03H17/06;H04B14/04;(IPC1-7):G06F17/17 |
主分类号 |
H03H17/00 |
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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