SYSTEMS AND METHOD FOR CONSISTENT FM/HD1 DIVERSITY DELAY
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United States of America Patent
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Issued Date -
Feb 16, 2023
app pub date -
Aug 15, 2022
filing date -
Aug 15, 2022
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Abstract
A broadcast system may have less restrictive timing constraints by providing synchronous processing chains for the HD audio portion and the FM audio portion so that no samples are added or removed from when the input audio is first sampled at an input rate and when the signals are combined and output by a digital analog converter operating at an output rate. The signals can be buffered within the synchronous processing paths and the state of the buffer can be used to control the input rate of the sampler. Graceful change over across multiple input sources can be achieved provided all input source input rates are controlled to by the overall output rate and all input sources are phase aligned to produce output symbols at the same time.
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