发明名称 |
Systems and methods for implementing a sample rate converter using hardware and software to maximize speed and flexibility |
摘要 |
Systems and methods for converting a digital input data stream from a first sample rate to a second, fixed sample rate using a combination of hardware and software components. In one embodiment, a system includes a rate estimator configured to estimate the sample rate of an input data stream, a phase selection unit configured to select a phase for interpolation of a set of polyphase filter coefficients based on the estimated sample rate, a coefficient interpolator configured to interpolate the filter coefficients based on the selected phase, and a convolution unit configured to convolve the interpolated filter coefficients with samples of the input data stream to produce samples of a re-sampled output data stream. One or more hardware or software components are shared between multiple channels that can process data streams having independently variable sample rates.
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申请公布号 |
US2004184573(A1) |
申请公布日期 |
2004.09.23 |
申请号 |
US20040805569 |
申请日期 |
2004.03.20 |
申请人 |
ANDERSEN JACK B.;HAND LARRY E.;CHIENG DANIEL L.W.;PAGE JOEL W. |
发明人 |
ANDERSEN JACK B.;HAND LARRY E.;CHIENG DANIEL L.W.;PAGE JOEL W. |
分类号 |
H03H17/06;(IPC1-7):H04L7/00 |
主分类号 |
H03H17/06 |
代理机构 |
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地址 |
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