Pulse or digital communications – Synchronizers – Synchronizing the sampling time of digital data
Patent
1997-02-26
1998-10-06
Tse, Young T.
Pulse or digital communications
Synchronizers
Synchronizing the sampling time of digital data
341 61, 3647241, H03M 700
Patent
active
058188886
ABSTRACT:
A sample rate converter is described for converting an input data stream including a plurality of input samples at one sample rate to an output data stream including a plurality of output samples at another sample rate. The converter uses an interpolation approach that utilizes an integer accumulator to track the timing relation between input samples and output samples. Based on the value of the accumulator, the method determines if the correct input samples are being used to calculate the current output sample. If so, the output sample is calculated as a function of the input samples and the accumulator value. The converter provides the robustness of a table based conversion approach without the need to pre-calculate and store a table, simplifies the calculations involved, and is less sensitive to numeric round off errors.
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Ericsson Inc.
Tse Young T.
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