Method and apparatus for analog and digital audio blend for HD radio receivers
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United States of America Patent
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Mar 14, 2017
Grant Date -
Aug 18, 2016
app pub date -
Feb 13, 2015
filing date -
Feb 13, 2015
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Abstract
A method and apparatus are provided for blending analog and digital portions of a composite digital radio broadcast signal by processing compressed audio packets to compute corresponding digital audio quality indicator values, storing the compressed audio packets in an audio blend buffer, processing audio information from each compressed audio packet stored in the audio blend buffer with an audio decoder to generate decompressed digital audio signal samples, and using the digital audio quality indicator values to guide a blending process for combining analog audio signal samples with the digital audio signal samples to produce an audio output by preventing unnecessary blending back and forth between analog and digital if the digital audio quality indicator values indicate that the compressed audio packets are degraded or impaired.
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