Video data decoding and video signal reproduction

摘要

A video data decoding technique is capable of outputting smooth video data in case of a special reproduction such as a forward or backward high-speed reproduction. DVD reproduction apparatus (100) includes a video decoder (6) which is intermittently supplied with data in the VOBU (video object unit) during a forward or backward high-speed reproduction and decodes only the first three I pictures or P pictures in each VOBU. According to control by a controller (11), the decoder (6) outputs the decoded I pictures or P pictures from a memory (13) having a capacity of three or more than three pictures. In the case of forward reproduction, the pictures are outputted according to the time axis, and in the case of backward reproduction, the pictures are outputted in the opposite direction of the decoding order. Moreover, the decoder (6) counts a VOBU passing time through a demultiplexer (5) provided at a preceding stage and outputs respective pictures at averaged intervals. That is, because three pictures are outputted for each VOBU, pictures are outputted at an interval of the averaged VOBU passing time multiplied by 1/3. <IMAGE>