Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1996-08-27
1998-08-11
Tran, Thang V.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 32, 369 58, G11B 2702
Patent
active
057937265
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a reproducing apparatus and a reproducing method for reproducing a program, such as audio data or video data, from a recording medium, and the recording medium. More particularly, it relates to a recording medium, compact disc (CD) or a video CD, having the program reproducing sequences previously recorded thereon, and a reproducing apparatus and a reproducing method for reproducing video data or audio data from the recording medium.
BACKGROUND ART
A wide variety of play-only (so-called ROM) type disc-shaped recording media, such as CD-DA (CD-digital audio), have become widespread. With the CD-DA, audio signals are digitized and recorded as audio data so as to be reproduced in order to enable the music or the like to be enjoyed wt a high sound quality. As a sort of this CD-DA, there has also been known a CD-G (CD-graphic) in which still picture data is recorded in a so-called sub-code data. There has also been developed a video CD, as a sort of the CD-ROM, in which moving picture data (video data) has been recorded as audio data.
Some of the video CDs have the so-called playback control function. The playback control controls the reproducing operation of a program, such as audio data or video data, using the list information pre-recorded on the video CD, and realizes a simplified interactive reproduction.
Specifically, mainly the selection list and the play list are recorded as the list information in the video CD. These lists are of a layered structure. The selection list is reproduced from the video CD and the menu based upon the selection list is displayed on a screen of the display section. The user then performs the selecting operation responsive to the menu screen and selects the play list which is a portion of the selection list. In the play list, there is stated the program to be reproduced, such as track numbers. When the play list is selected, the reproducing device reproduces the program stated in the play list. Basically, by such operation, the video CD may be utilized as a software of the type that permits conversation with the user.
Meanwhile, if a menu is displayed by this playback control on the screen, the user occasionally does not perform any selective operation responsive to the displayed menu. In anticipation of such case, the wait time is set in the selection list. Besides, there is recorded therein an operation which should be executed when the wait time has elapsed without any operation being performed. That is, if the time has elapsed without any operation being performed, a particular alternative (program) in the selection list may be executed automatically.
There is also known a reproducing apparatus for reproducing a CD (CD player) having a random number generator, so that, when the user presses an operating button commanding random reproduction, the program of a number corresponding to the random number generated by the random number generator is reproduced.
However, the random reproduction is performed by the user's instruction, that is, it is not performed automatically. Thus, if random reproduction is to be performed in an exhibition of products or a demonstration at a retail store, the user has to press the operating button each time random reproduction is made, which inconveniences the user.
On the other hand, the random numbers generated by the random number generator are not necessarily different but the same value may be generated on end, while the random numbers may be generated in the same sequence for the first run of random numbers and the second run of random numbers, thus giving no fascinating reproducing sequence.
In view of the above-mentioned problem of the prior art, it is an object of the present invention to provide a recording medium on which is recorded not only the program of audio data or video data but also the descriptor or identifier commanding a playback mode of continuous program reproduction or random program reproduction.
It is another object of the present invention to provide a reproducing apparatus
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patent: 5613109 (1997-03-01), Yamauci et al.
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Frommer William S.
Sony Corporation
Tran Thang V.
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