JP2012039247A5 - - Google Patents

Claims (10)

Address management means for managing a first address map including reproduction time information, position information, and size of an access unit of a video / audio stream recorded on a recording medium;
Playback position management means for determining a playback unit based on playback conditions of the video and audio stream;
First information including reproduction time information, position information and size corresponding to the reproduction unit determined by the reproduction position management means based on the reproduction time information, position information and size of the access unit recorded in the first address map . Second address map generating means for generating two address maps;
Stream control means for reading the reproduction unit from the recording medium based on the second address map;
A video / audio reproduction device comprising: decode control means for decoding the reproduction unit read from the recording medium by the stream control means. The video / audio playback apparatus according to claim 1, wherein the playback position management means determines the entire video / audio stream as a playback unit when the playback condition is playback at a normal speed. 2. The video / audio playback apparatus according to claim 1, wherein the playback position management means determines the playback unit corresponding to the partial section when the playback condition is normal speed playback of only the partial section. The video / audio playback apparatus according to claim 1, wherein the playback position management means determines a key frame as a playback unit when the playback condition is special playback. The video / audio playback apparatus according to claim 1, wherein the playback position management means determines a plurality of frames including key frames as playback units when the playback condition is special playback. An address management step of managing a first address map including reproduction time information, position information, and size of an access unit of an audio / video stream recorded on a recording medium;
A playback position management step for determining a playback unit based on playback conditions of the video and audio stream;
First information including reproduction time information, position information, and size corresponding to the reproduction unit determined in the reproduction position management step based on reproduction time information, position information, and size of the access unit recorded in the first address map . Second address map generating means for generating two address maps;
A stream control step of reading the reproduction unit from the recording medium based on the second address map;
A video / audio reproduction method comprising: a decoding control step of decoding the reproduction unit read from the recording medium in the stream control step. 7. The video / audio playback method according to claim 6, wherein the playback position management step determines the entire video / audio stream as a playback unit when the playback condition is normal speed playback. 7. The video / audio reproduction method according to claim 6, wherein the reproduction position management step determines a reproduction unit corresponding to the partial section when the reproduction condition is reproduction at a normal speed of only the partial section. 7. The video / audio reproduction method according to claim 6, wherein the reproduction position management step determines a key frame as a reproduction unit when the reproduction condition is special reproduction. 7. The video / audio reproduction method according to claim 6, wherein the reproduction position management step determines a plurality of frames including key frames as reproduction units when the reproduction condition is special reproduction.