METHOD AND APPARATUS FOR AUDIO SYNCHRONIZATION

摘要

A method and apparatus utilizing a single processor and a plurality of memories for providing audio synchronization including writing an incoming PES audio stream having header information, PTS timing information and payload information and audio information to an input buffer. The method and apparatus further includes reading the incoming audio stream from the input buffer and parsing the timing information and the audio information. The audio information, ES information, is written to an intermediate buffer. Based on the timing information, the method and apparatus further includes reading the audio information from the intermediate buffer and decoding the audio information to generate decoded audio information, PCM information. The method and apparatus includes writing the decoded audio information in an output buffer, wherein the decoded audio information may be provided from the output buffer to a digital-to-analog converter and thereupon provided to an audio system.

主权项

1. A digital signal processor comprising:
a first output port coupled an external memory; a second output port coupled to a plurality of buffers, including an input buffer, an intermediate buffer, a temporary buffer and an output buffer; and the digital signal processor, in response to executable instructions from the external memory:
writes an incoming audio stream having timing information and audio information to the input buffer;reads the incoming audio stream from the input buffer;parses the timing information and the audio information;writes the audio information to the intermediate buffer;based on the timing information, reads the audio information from the intermediate buffer;decodes the audio information to generate decoded audio information;writes the decoded audio information in the temporary buffer;reads the decoded audio information from the temporary buffer;performs post processing on the decoded audio information to generate post processed decoded audio information; andstores the post processed audio information in an output buffer.