Subimage reproducing control device and method therefor

Abstract

The present invention provides a secondary image regeneration device and a method thereof which can obtain a primary image and the secondary image stably when a special regeneration is switched to a general regeneration. A primary timer shows the whole reference time of the device by counting value. A control part contrasts the reference time with a system clock reference of a data packet head and then takes regulated relation grouping into a memorizer to generate a data unit. When the counting value is larger than a displayed time mark of the data unit, the data unit is decoded. When the special regeneration is switched to the general regeneration according to the control of the control part, the primary timer is set again according to the system clock reference of a latest taken-in data packet.

Description

technical field [0001] The present invention relates to a method and device for reproducing a recording medium on which compressed main image data of moving images, subpicture data such as subtitles, sound data, etc. are recorded, and particularly relates to subpicture reproduction control Methods and devices. Background technique [0002] In existing video tape recorders and LD (laser disk) reproducing devices, subtitles may also be reproduced when reproducing images. However, the subtitles displayed on the screen are recorded inseparably from the main image. [0003] In view of this situation, recently, a kind of such system has been developed, that is: moving picture data, sound data, sub-picture data (for example: subtitle data) are compressed, and recorded in a small high-density disk (diameter approx. 12cm), and there are many different languages ​​recorded on the audio and subtitles. When reproducing, the audio and subtitles of the desired language can be arbitrarily...

AI Technical Summary

Problems solved by technology

[0007] In the ordinary reproduction of such an optical disk, when switching to, for example, still picture reproduction or slow-motion reproduction, it is extremely difficult to manage the time for synchronously reproducing the above-mentioned sub-picture and main picture.

Moreover, in the ordinary reproduction of such an optical disc, when switching to, for example, forward fast forward or reverse fast forward, it is also extremely difficult to manage the time for synchronously reproducing the above-mentioned sub-picture and main picture.

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