Transcoding device, transcoding method and program thereof

摘要

A device, a method and a program to simplify transcoding of TTS (timestamped transport streams). When transcoding video data in the input TTS, the video processor unit reattaches time stamps in sequence within the applicable frame period of each video frame to each video packet within the applicable video frame after recompression. When transcoding audio data in the input TTS, the audio processor unit reattaches time stamps in sequence within the applicable video frame period of each video frame to each audio packet in the applicable video frame after recompression.

主权项

1. A transcoding device to transcode either or both the video data or audio data contained in the input TTS (timestamped transport stream) including time stamps attached to each packet, the transcoding device comprising:
a video processor to decode and recompress the video packets in the input TTS, and to also reattach time stamps in sequence within the applicable frame period of each video frame to each video packet in the applicable video frame after recompression when transcoding video data, and to output each video packet in the input TTS unchanged when not transcoding the video data; an audio processor unit to decode and recompress the audio packet in the input TTS and to also reattach time stamps in sequence within the applicable video frame period of each video frame to each audio packet in the applicable video frame after recompression when transcoding the audio data, and to output the audio packet in the input TTS unchanged when not transcoding the audio data; and a remultiplexer unit to position the video packets and audio packets output from the video processor unit and audio processor unit in the time sequence shown on each time stamp and obtain the output TTS, wherein the video processor unit reattaches the time stamps so that the times shown on the time stamp of each video packet after recompression are arranged at regularly spaced intervals within the period of the applicable video frame, wherein the audio processor unit reattaches the time stamps so that the times shown on the time stamp of each audio packet after recompression are arranged at regularly spaced intervals within the period of the applicable video frame, and wherein the remultiplexer unit includes a correcting unit to correct the time stamps of the video packets or the audio packets so that the respective times shown on the time stamps do not overlap during remultiplexing.