| 摘要 |
A DSP apparatus for synchronizing AV signals and a method thereof are provided to correct the deviation of sync generated in transcoding a video signal transmitted from a business supporting MPEG4(Moving Picture Experts Group4) into an MPEG2 video signal supported by a device, thereby providing exactly an MPEG4 video. A DSP(Digital Signal Processor) apparatus(100) for synchronizing AV(Audio/Video) signals comprises a tuner(110), an interface unit(160), and a signal processing unit(130). The tuner tunes a selected channel. A CI(Common Interface) module is mounted on the interface unit to perform the transcoding of the video signal of a first compression mode into a second compression mode, synchronize the audio signal of the tuned channel with the video signal, and output the AV signals in a TS(Transport Stream) type. The signal processing unit monitors a different between a first visual point, where the audio signal included in the TS inputted from the interface unit is actually outputted, and a second visual point, where the audio signal of the TS is decoded to be outputted to the outside, and corrects adaptively a threshold value used in adjusting the output time of the audio signal by channel by using the monitoring result.
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