Audio and video disc data structure and operating method

Abstract

A data structure of audio-video disc has a pilot data file, which uses multiple forms of different data classes for respectively recording the information associated with another audio-video data file on the disc. Each form has a head and a serial number. In each data class, there is an edit information form for recording the edited information in this data class. The newly added or edit form is written to disc in additional mode. At the beginning of reproducing audio-video data, all the forms are combined into a pilot data file. As a result, the newly added or edited audio-video data can be reproduced without modifying original pilot data file.

Description

technical field [0001] The present invention relates to a guide data structure of an audio-visual disc and an operation method thereof, in particular to a file structure for recording guide data generated by editing or adding audio-visual data, and the use of this file structure The method of playing the content of video and audio data. Background technique [0002] The method of storing audio / video data (Audio / Video data) using discs (such as optical discs or magnetic discs) has long been known by people. Record two files; one of them is an audio-visual data file used to record audio-visual content, and the so-called audio-visual data is, for example, ".VRO file" (.VRO file) in the DVD-Video Recording specification; and the other The file is the navigation data file (Navigation file) that records the relevant navigation data (Navigation data) required when playing audio-visual data, for example, the ".ifo file" defined in the DVD-Video Recording specification (.ifo file)....

AI Technical Summary

Problems solved by technology

[0005] 1. When adding static or dynamic audio-visual data (such as video programs), the static or dynamic audio-visual information table (still or Movie A / V information table) must be updated, and then the entire guide data file must be updated

[0006] 2. When the user edits or changes the playlist, the playlist information table (playlist information table) must be updated to update the entire guide data file; if the available capacity of the disc is insufficient, or the user can only write For write-once discs, this update method will cause damage to the disc and reduce the service life. If you use a write-once disc, you need to rewrite the guide data every time. The file update method will cause a waste of disc space; the main reason is that each form (table) in the guide data file adopts the address recording method (the information of its starting address is recorded in the management information form), Therefore, every time any form is updated, the starting position needs to be changed again, so the content of the guide data file must be revised and updated, and the old guide data file must be discarded

Images