JPS593668A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To facilitate and speed up access, by changing lists of the contents of a disk from rough classification to fine classification successively and adding the classification number of an information signal relative to each information signal. CONSTITUTION:Reproduced data from a disk player 3 is written in a video memory 4. Read data from the video memory 4 is converted by a D/A converter 5 into an analog video signal, which is supplied to a monitor picture receiver 6. The reproduced data of the disk player 3 is supplied to separating circuits 8 and 9 and a list signal separated by the separating circuit 8 is stored in a memory 10. The output of the memory 10 is supplied to a display 11 and the classification of video data being reproduced is displayed. Relative list signals in the reproduced data are separated by the separating circuit 9 and three relative list signals A, B, and C are stored in a memory 12 and read out by operating a keyboard 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disk playback device that plays back video or audio information signals from optical disks, magnetic disks, and the like.

For example, optical discs have convenient functions such as random access, quick access, and repeat playback for non-contact playback. One variety of information signals can be recorded on this optical disk, and by digitizing and recording, a large amount of information signals can be recorded.

In this way, when a large number of various types of information signals are recorded, it is not necessarily easy to access the information signal that is desired to be reproduced. The present invention is suitable for application to such cases.

In addition to displaying a list of contents recorded on the disc, this list is sequentially changed from large classification to detailed classification, making it possible to access easily and quickly. Further, the present invention adds a classification number of the information signal related to the accessed information signal so that the related information can be easily accessed. will be explained with reference to the drawings. In this example, a digital video signal is recorded on an optical disc (referred to as a compact disc) at a relatively low speed, eg, at a similar sampling rate as the digital audio signal.

FIG. 1 shows the structure of signals recorded on a compact disc. First, a synchronization signal 5YNC (or preamble signal) is added at the beginning, a list signal and /frame worth of video data are placed after 1, and a related list signal is added at the end. This list signal and related list signals are:

This enables playback even during access, in which the pickup moves in the radial direction of the compact disc at a higher speed than during normal playback.

The list signals include a signal S indicating a section which is a major classification, a signal C indicating a class which is a medium classification, and a signal L- which is a minor classification.
It also includes a signal G indicating the current state.

As shown in FIG. 2, there are, for example, 72 categories of sections, classes, and groups.

Each of O/ to /K included in this group corresponds to seven still images (information images). therefore,(
/2X/2X/2=/72g) still images are recorded on a compact disc. Furthermore, in order to display the list, (/+/2+1llI=/!;7) still images are required. As shown by the dotted line area in FIG. 3, the above-mentioned video data for list display is recorded in the innermost area 2 of the compact disc 1 that is played first.

To give an example, there is a section (Geography of the World 1 Geography of Japan 1 Economy of the World 9 Economy of Japan...),
(as a class related to Japanese geography).

(Map of Japan, map of each region 1 population 9 areas...), and as a group related to (area), (area of Japan,
There is an ocean and land area ratio of 1 (national topography/mark).

Furthermore, up to three types of related list signals, A, B, and C, can be added. Each of this related list signals.

It consists of a combination of (section-class-group) and corresponds to the classification number attached to related video information.

Figure ≠ shows the configuration of an embodiment of the present invention.

In the figure, numeral 3 indicates a compact disc player. This disc player 3.

A reading laser beam is incident on the signal surface of a compact disk that is rotated at a constant linear velocity, and its reflected light is separated by a polarizing beam splitter and converted into an electrical signal by a photodiode. This reproduced signal is supplied to an error correction circuit via an amplifier, a waveform shaping circuit, and a demodulation circuit, and reproduced data with error correction appears at the output of the disc player 3.

This playback data is written into the video memory 4. The reproduced data is slow and is written into the video memory 4 for a predetermined period of time, and when read out, the video data is repeatedly read out using regular sampling data. The video memory 4 only needs to be able to store data for at least one frame.

In this example, two 1/7 frame memories are provided as the video memory 4. The data read from the video memory 4 is converted into an analog video signal by a D/A converter 5 and then supplied to a monitor receiver 6.

Further, playback data from the disc player 3 is supplied to front circuits 8 and 9, and a list signal separated by a separation circuit 8 is stored in a memory 1o.

The output of this memory 10 is supplied to a display device 11.

The classification of the video data being played is displayed. Also.

The related list signal in the reproduced data is separated by the separation circuit 9, and three related list signals A, B, and C are stored in the memory 1.
It can be stored in 2.

At first when the disc player 3 starts the playback operation, the above-mentioned list signal is played back and the monitor receiver 60 screen 7 is displayed.
First, as shown in Figure S.

A display regarding the section is displayed. While viewing this display, the user specifies the desired classification number. For this purpose, a keyboard, designated 13 in FIG. 11, is provided.

This keyboard 13 is as shown in FIG.

Numeric keypad 17 and function keys 18, 19゜20
and a related list designation key 21. The numeric keypad 1T is used to specify a desired classification number. The key 18 is pressed when it is confirmed that the classification number specified by the numeric keypad 17 is correct. Key 19 is.

This button is pressed to increase and/or decrease the classification number by 7 and display each number. The key 20 is used to automatically change the classification number. Further, the related list designation key 21 is used to specify desired one of the three pieces of related information.

The classification number designated by the numeric keypad 17 of the keyboard 13 is stored in the memory 14, and the output of this memory 14 is supplied to the display device 15 and the system control circuit 16. In addition, the function key 1B of the keyboard 13
, 19.20 key signals are system control circuit 1
6. Further, the output of the related list designation key 21 of the keyboard 13 is supplied to the memory 12.
A designated one out of the related lists stored in is extracted and supplied to the system control circuit 16.

At the beginning of disc playback, sections are displayed on the screen 7 of the monitor receiver 6, as shown in FIG. 17. For example, if you enter 03C Japanese geography), this will be displayed in memory 14.
The signal is displayed on the display device 15 and is also supplied to the system control circuit 16 via. In the system control circuit 16, the display data of the class list included in section 03 is accessed and read. And on the screen 7 of the monitor receiver 6.

A list of laths such as (07: area, 02 population, . . . ) is displayed.

Next, when a desired class number, for example O7 (area), is entered using the numeric keypad 17, this is transferred to the memory 14, displayed on the second display device 15, and also supplied to the system control circuit 16. As a result, the display data of the list of groups included in class O"/ is accessed and reproduced. Therefore, on the screen 7 of the monitor receiver 6, l/: topography of the country, .../l2 Japan A list of groups such as 12=ocean and land area ratio) is displayed.

What you would like from this list of groups, e.g. //
By entering (area of Japan).

The video data corresponding to the classification number <03-07-/ /) is accessed and played back, and the video data is displayed on the monitor receiver 6.
A display as shown in FIG. 7 appears on the screen 7. As is clear from FIG. 7, the data for each frame recorded on the disk also includes display data regarding related lists A, B, and C. The classification number of the video information being played back is displayed on the display device 11, and the classification number of this related information is stored in the memory 12.

If the function key 19 is pressed while classes and groups are being displayed, the classes and groups whose classification numbers are increased or decreased by 1 are displayed. Further, when the function key 20 is pressed, classes and groups whose classification numbers are increased by / are automatically displayed.

It takes several seconds to play back 17 frames of video data from a compact disc.

While reading previously written data from one frame memory of the video memory 4.

By writing new reproduction data into the other frame memory, the display screen is prevented from disappearing when the video data to be reproduced changes.

If the classification number of the desired video information is known in advance, it can be directly accessed by key operations on the keyboard 13. In this case, numeric key 1
It is sufficient to enter the respective classification numbers of sections, classes, and groups known from 7 and press the function key 18 after confirming that what is displayed on the 9 display device 15 is correct. In the system control circuit 16.

By pressing this key 18, the video information of the specified classification number is accessed. Furthermore, since the classification number of the related list included in the displayed image is stored in the memory 12, the related list designation key is pressed. By operating 21, a particular classification number can be read from memory 12 and provided to system control circuit 16, and the video information corresponding to this classification number is accessed. in this way,
When a predetermined item is specified in the related list, the specified classification number may be displayed on the display device 11.

Note that the access operation by the system control circuit 16 involves an optical pickup moving in the radial direction of the disk, supplying the list signal read at that time to the comparison circuit, and checking whether it matches the specified one or not. The pickup is checked and when it matches, the pickup stops moving.

In addition to the keyboard 13, the classification number may be input using a remote control device or an input device using voice recognition. Also.

The present invention is applied to playback of discs on which audio information is recorded together with video information, discs on which only audio information is recorded, discs on which these information signals are recorded in the form of analog signals, etc. I can do it.

When recording each frame of an analog video signal as seven circumferential tracks, it is sufficient to insert a list signal and related list signals by FSK or the like into a part of the vertical blanking period. With such a disc, a still image can be obtained by repeatedly playing back the same track.

As understood from the above explanation, according to this invention,
When many types of information signals are recorded on a disc, classification numbers are divided into blocks from large classifications to more detailed classifications.

You can easily and quickly send the desired information signal.

According to this invention, since related information can be presented, it is possible to easily select not only information that the user wants to know but also information that is convenient to know. By bringing about such advantages, the present invention can further increase the utility value of the disc.

[Brief explanation of the drawing]

Figure 1 is a route map used to explain the signal configuration according to an embodiment of the present invention, and Figure 2 is a route map used to explain the classification method according to an embodiment of the present invention. are a route map used to explain the disk in an embodiment of the present invention, Figures 1 and 6 are block diagrams showing the overall configuration of an embodiment of the present invention, and a plan view of a keyboard as a part thereof; 5 and 7 are route maps of display images used to explain one embodiment of the present invention. 0 1...compact disc, 3...disc player, 4 ...Video memory, 6...
...Monitor receiver, 13...Keyboard. Agent Masatomo Sugiura-35 ( ) Figure 1 Figure 4

Claims (2)

[Claims] (1) A display device that sequentially displays a list of information signals recorded on a disk from large categories to small categories using a list signal that is reproduced prior to the information signal, and 1. A disc playback device comprising an input device for specifying a predetermined information signal, and accessing and playing back the specified information signal. (2) A display device that displays a list of information signals recorded on the disc using a list signal that is reproduced in advance of the information signal, and an input device that specifies a predetermined classification or a predetermined information signal in this list. and a means for separating a signal indicating a plurality of related information added to each information signal from a reproduced signal, and a means for specifying a predetermined piece of the related information. A disc reproducing device configured to access and reproduce the predetermined information signal or the predetermined related information.