Video/Audio reproducing apparatus, and reproducing method and program and medium

Abstract

There has been a case where during the changing of a speed such that the continuation time is reduced or extended, the output timing of a video signal and the output timing of an audio signal can largely deviate from each other in comparison with the case of normal reproduction, and that the synchronization can not be maintained. An audio video reproduction apparatus comprising: an audio speed conversion circuit 1008 of performing audio speed conversion on a generated audio signal in such a manner that the information on an A-PTS is maintained, depending on an executing reproduction speed; an audio output buffer circuit 1009 of accumulating the audio signal having undergone the audio speed conversion and of outputting the signal according to the executing reproduction speed; a video output buffer circuit 1004 of accumulating and outputting a generated video signal; and a comparison circuit 1011 of comparing the A-PTS with a V-PTS by using the maintained information on the A-PTS; wherein using the result of the comparison, the video output buffer circuit 1004 outputs the accumulated video signal according to the executing reproduction speed.

Description

technical field [0001] The present invention relates to an audio-visual reproducing device, an audio-visual reproducing method, a program, and a medium capable of maintaining audio-visual synchronization even when reproducing at a speed other than 1x speed. Background technique [0002] A conventional audio-visual reproduction device performs reproduction using a method for maintaining synchronization of audio-visual data described below (see, for example, Publication No. 2001-8170). FIG. 11 is a block diagram of a conventional audio-visual reproducing apparatus capable of maintaining audio-visual synchronization even when reproduction is performed at a speed other than one. [0003] All the contents disclosed in JP-A-2001-8170 are fully incorporated into this specification by reference. [0004] The system analysis circuit 1 is a circuit that distinguishes input data into video data and audio data. [0005] The video input buffer circuit 2 is a video data circuit output b...

AI Technical Summary

Problems solved by technology

[0020] However, in the conventional audio-visual reproduction apparatus described above, during the speed change period in which the speed is set to shorten or prolong the duration, the video signal output timing and the audio signal output timing deviate greatly from the normal reproduction time, and there is a problem that accurate synchronization is often impossible.

Images