Patent ID: 7054544

Claim:
An audio-video synchronous playback control system which outputs coded audio data to an external audio decoding device of an external audio output device so that the coded audio data will be decoded and played back by the external audio decoding device, while playing back video data maintaining synchronization between the audio data playback and the video data playback, comprising: an audio processing means which generates silent data of a size corresponding to the size of audio data which is obtained by decoding the coded audio data outputted to the external audio decoding device; an internal audio output means which plays back or processes the silent data which are generated by the audio processing means; a video data playback means which plays back the video data; and an audio-video synchronous playback control means which controls the video data playback of the video data playback means maintaining the synchronization with the audio data playback of the external audio decoding device based on the amount of the silent data which are played back or processed by the internal audio output means.