Sample rate converter
A technology of sampling rate and conversion method, applied in code conversion, digital transmission system, synchronous signal speed/phase control, etc., can solve problems such as problems
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[0024] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which a preferred embodiment is shown. However, the present invention can be used in many different embodiments and is not limited to the embodiments described herein.
[0025] The method of the present invention is a variant of interpolation in which an integer accumulator 220 is used to calculate the relative position in time of the input and output samples. For linear interpolation, this method uses two positive integer constants A and B to calculate the timing relationship between two input samples and one output sample. If the sampling period of the input signal is T x , and the sampling period of the output signal is T y , then select A and B such that A and B satisfy the following equation:
[0026] A / B=T x / T y The actual values or sizes of A and B depend on the level of precision desired, among other considerations. In the implementation, the i...
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