JPH0620450A - Cd-rom disk reproducing device - Google Patents

Abstract

PURPOSE:To enable the reproduction from an operating state at the time of interruption of the reproduction when the reproduction is resumed by storing the operation at the time of the interruption in a storage means when a power source is cut off on an urgent matter or by mistake. CONSTITUTION:Program progressing data for controlling the reproduction of a CD-ROM is stored in turn by the storage means (main RAM) 6. As to this storage means 6, when the reproducing control of the CD-ROM is stopped by a usual power switch, contents of the storage means 6 is not stored. However, when the power source is cut off on an urgent matter, etc., by a book marker switch means (input key board) 7, or when the power source is forcibly cut off by opening a door by mistake against the will, the program progressing data is stored by the storage means 6. Then, when the reproducing control of the CD-ROM is resumed, the stored contents of the storage means 6 is called, and the reproducing control state is restored to its state at the time of the interruption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is a CD-ROM (Co-recorded in accordance with the compact disc format in which information such as dictionaries, encyclopedias, road maps, etc. is exchanged for digital data and recorded.
mpactDisc Read Only Memor
y) A CD-ROM disc reproducing device for reproducing a disc.

[0002]

2. Description of the Related Art Conventionally, publications such as dictionaries, encyclopedias, and road maps have been made in compliance with the compact disc format.
A so-called CD-ROM disc, which is optically recorded on a disc as digital data, is known. CD-RO
The M disc playback device has an enormous total number of pages that can be recorded on one disc, easy random access because it is an optical disc, and semi-permanent life because it is non-contact playback. Due to such reasons, it has been spreading recently.

The physical characteristics of the CD-ROM disk (size, optical characteristics, track pitch, modulation method, etc.)
Since it complies with the CD (Compact Disc) format, the mechanism of the CD-ROM disc reproducing device can also be used as a conventional CD player, and a CD-ROM can be easily used with the addition of a data decoder for a part thereof. It is possible to provide a dual-purpose player for both a disc and a CD.

[0004]

The disk drive 1 is necessarily provided with a door or a mechanism for ejecting a CD-ROM disk for replacement work. If this door is forcibly opened during the reproducing operation, the rotating disk will pop out or the laser beam for reading will leak to the outside, which is extremely dangerous. Therefore, as a fail-safe measure, when the door is opened, the power is forcibly turned off to ensure safety.

However, when there is an urgent need or the like, the power is turned off, or the door is accidentally opened to forcefully turn off the power, and then the reproduction is performed again, it is necessary to perform the operation from the initial processing again. For example, if a long sentence is recorded on a CD-ROM disc, and if you continue to read it halfway, the power will turn off due to urgent need, or if you accidentally open the door, the power will turn off. Sometimes I would like to restart from the middle when playing again, but I could not restart from this middle.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a CD-ROM disc reproducing apparatus capable of returning to a point of time at which reproduction is interrupted when resuming reproduction.

[0007]

A CD-ROM disc reproducing apparatus of the present invention has a storage means for storing progress data of a program for controlling reproduction of a CD-ROM disc, a power switch means, and a book marker switch means.
The storage means sequentially stores the progress data of the program. When the reproduction control of the CD-ROM disc is directly stopped by the power switch means, the contents of this storage means are not saved. However, when the reproduction control of the CD-ROM disc is interrupted by the bookmarker switch means or against the intention, the progress data of the program is stored by the storage means. And this CD-
When the reproduction control of the ROM disc is restarted, the contents stored in the storage means are called to restore the reproduction control state of the CD-ROM disc to the state at the time of interruption.

[0008]

In the present invention, the progress data of the program is sequentially stored in the storage means, and when the reproduction control of the CD-ROM disc is interrupted by the book marker switch means or unintentionally, this storage means is stored. Program progress data is saved. Therefore, CD-ROM
When the reproduction of the disc is resumed, the reproduction operation at the time when the reproduction is interrupted can be restored based on the progress data of the program stored in the storage means.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A CD-ROM of the present invention will be described below with reference to the drawings.
An embodiment of the disc reproducing apparatus will be described.

FIG. 1 is a block diagram showing an example of a CD-ROM disc reproducing apparatus according to the present invention. The optical disc drive 1 reads a signal recorded on a disc as in a known CD player. The signal is supplied to the data processing unit 2. The data processing unit 2 is a CD-RO
The data for M disc is demodulated, and the demodulated data is supplied to an I / O (Input Output) interface 3. I / O interface 3
Is supplied with an operation command signal from the input keyboard 7,
These data and operation command signals are transmitted via the I / O interface 3 to a CPU (Central Process).
ng Unit) 4. CPU4 is ROM
The operation of the entire apparatus is controlled based on the program stored in (Read Only Memory) 5. CP
RAM (Rand) for storing further instructions in U4
om Access Memory) 6 is connected. Further, the CPU 4 is connected to the disc drive 1 with a control line for giving an operation command such as play, search and stop.

The output signal of the I / O interface 3 causes the LCD (Liquid Crystal Display) to operate.
lay), CRT (Cathode Ray Tub)
e) A VRAM (Video) for displaying graphics video data on a display device 10 such as a display and supplying the video data to a display controller 8 for controlling the graphics video data, and storing the video data to be displayed in the display controller 8.
RAM) 9 is connected.

The power required for each of the above circuits is the power supply circuit 11
Sourced from. A general operation of the CD-ROM disc reproducing device having the above configuration will be described. First,
When the power is turned on, the CPU 4 performs a predetermined initial process according to the program stored in the ROM 5 and controls the display controller 8 so that the display device 10 displays the initial menu screen.

Next, when the user gives an arbitrary operation command from the input keyboard 7, the CPU 4 causes the ROM 5 to operate.
According to the program stored in, the search command is given to the disk drive 1, for example, and desired data is read from the CD-ROM disk. The read data is R
Once stored in the AM 6, the CPU 4 supplies necessary data to the display controller 8 according to the program in the ROM 5. The display controller 8 stores the data to be displayed in VRAM.
After it is stored in 9, the display device 10 displays it. The data displayed on the display device 10 is subjected to page scrolling under the control of the display controller 8.

In the CD-ROM disc reproducing apparatus of the present invention, the program executed by the CPU 4 as the control means is stored in the RAM 6 as the sequential storage means. RAM 6 for sequentially storing the progress of this executed program
The stack pointer (S
P) and a counter indicating the address on the ROM 5 of the program currently being executed are called a program counter (PC).

Further, the input keyboard 7 operated by the user has a C key in addition to the numeral keys, the character keys, the cursor keys and the like.
A stop key (power off key) for turning off the power of the D-ROM disc reproducing device, a reproduction key for inputting power and reproduction, a book marker switch key for selecting a book marker mode command for instructing reproduction from the interruption position when resuming reproduction, and the like. It is provided.

Further, the RAM 6 and the VRAM 9 are adapted to be supplied with backup power even when the power is off when the bookmarker mode is selected. The bookmarker mode means returning to the state at the time of interruption.

The control operation performed by the CPU 4 in the CD-ROM disc reproducing apparatus of this embodiment will be described below with reference to the flowchart of FIG. When the power is turned on and the reproduction is started, it is first determined in step S1 whether or not the book marker flag is on. If the bookmarker mode is not designated by the bookmarker flag, the process proceeds to step S2, the data stored in the RAM6 and VRAM9 is reset, and the process proceeds to step S3 to display a predetermined initial screen on the display device 10. . If it is determined in step S1 that the bookmarker mode is designated, the process directly proceeds to step S3,
The initial screen is displayed on the display device 10, and the process proceeds to step S4.

In step S4, it is determined whether the disc is a CD-ROM disc or a normal CD. As a method of determining this, the TOC (Table O recorded in the lead-in area of the disc is recorded.
Since data capable of identifying both discs is recorded in the f Contents) information, the disc may be identified by referring to this.

If it is determined that the disc is not a CD-ROM disc, the process proceeds to step S5 and a normal C
Proceed to the D reproduction routine. The CD reproduction routine will not be described in detail here. If at step S4 C
If it is determined that the disc is a D-ROM disc, the process proceeds to step S6. In step S6, the volume ID (IDentification) and time data are loaded into the RAM 6 from the TOC information. Next in step S7
The bookmarker flag is judged by and it is judged again whether the bookmarker mode is ON.

If there is no bookmark marker flag, the process proceeds to step S8, a predetermined track of the disc is reproduced, and the obtained information is recorded in step S8.
9 is displayed, and the process proceeds to step S10. Also, step S7
If it is determined in the book marker mode in step S11, the flow advances to step S11 to check whether the volume ID and time data newly read in step S6 are equal to the volume ID and time data stored previously.

If it is determined that they are not equal to each other, the CD-ROM disc has been exchanged, so that the operation in the book marker mode is not performed and the step S8 is performed.
Proceed to. The screen in step S9 is, for example, CD-
A one-column table of a book stored in the ROM or a table of contents of the book is displayed, which is a screen for the user to select.

If, in step S11, the volume ID
And the time data are equal, the process proceeds to step S12, the values of the stack pointer and the program counter stored in the RAM 6 are checked, and step S13 is performed.
To jump to the program position indicated by the program counter to return the operation of the CPU 4 to the state at the time of interruption. Then, the screen at the time of interruption is displayed in step S14, and the process proceeds to step S10.

In step S10, the book marker flag is turned on, the values of the program counter and stack pointer are saved in the RAM 6 in step S15, and the key input waiting in step S16 is entered. At this time, step S1
At 7, it is always judged whether the door is opened or the eject button is operated. If the door is opened or the eject button is pressed without pressing the stop button, the process proceeds to step S18, and it is confirmed that the book marker flag is on and the process proceeds to step S19.

In step S19, the bookmark marker flag is stored in the RAM 6 and the power of the CD-ROM disc reproducing device is turned off. Of course, even in this case, RAM6 and VR
Backup power is supplied to AM9. That is, in step S19, when the bookmark marker flag is stored in the RAM 6 and the processing ends, the bookmark marker mode is turned off, and the contents of the stack pointer and the program counter at the time of interruption and the bookmark marker flag are stored in the RAM 6. Therefore, unless the CD-ROM disc is replaced, the next time the power is turned on, the state at the time of interruption is automatically set as described above.

On the other hand, if any key is operated, step S2
At 0, check if the book marker key is pressed. If the pressed key is the book marker key, the process proceeds to step S18, the book marker flag is confirmed, the flag is stored in the RAM 6 in step S19, and the power is turned off. This state is of course turned off in the bookmarker mode, so the next time you turn on the power, the CD-R
The OM disc reproducing apparatus automatically becomes the state before the book marker key is pressed.

If the key pressed in step S20 is not the bookmarker key, the operation of the CPU 4 proceeds to step S21 to check whether the stop key (power off) has been pressed. If the operation of the stop key is confirmed here, it is not in the book marker mode.
In step S22, the book marker flag is turned off and the process proceeds to step 18. Then, since the flag is off, the CD-R can be stored without storing the flag in the RAM 6.
The OM disc player is turned off. In this case, when the power is turned on next time, it is necessary to perform the operation from the beginning.

If it is determined in step S20 or step S21 that another key which is neither the stop key nor the bookmark marker key is operated, the process proceeds to step S23, the bookmark marker flag is turned off, and the corresponding operation is performed. The process is performed in step S24. The result of the process in step S24 is displayed in step S25, the process returns to step S10, and the process goes to step S15 to wait for key input in step S16. In step S23, the bookmark marker flag is turned off in step S24.
Since the processing by the CPU 4 is being performed during the operation of, the flag cannot be set to 1 o'clock because the book marker mode cannot be set.

By operating as described above, for example, in the case of searching and reproducing a CD-ROM disk of a dictionary, for example, even in the input mode of the word to be searched, the primary search is finished and the search is performed. The book marker function works even in any state, such as when the list of headwords is displayed, or finally when the body text data is displayed together with the headword.

Although it has been described that the VRAM 9 is also backed up, if the VRAM 9 is backed up, the display screen can be changed to the screen when the display screen is interrupted after step S11.
9 does not need any backup.

If the RAM 6 has a sufficient capacity, the video data stored in the VRAM 9 may be transferred when the power is turned off, and the backup to the VRAM 9 may be stopped.

The present invention is not limited to the above embodiment,
Of course, various other configurations can be obtained without departing from the scope of the present invention.

[0032]

According to the present invention, even when the power is turned off by the bookmarker key due to an urgent need, or when the door is accidentally opened and the power is forcibly turned off,
Since the operation at the time when the reproduction is interrupted is stored in the storage means, there is an advantage that the operation can be resumed from the operation state at the time when the reproduction is restarted.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an example of a CD-ROM disc reproducing device.

FIG. 2 is a flowchart showing an embodiment of the operation of the CD-ROM disc reproducing apparatus of the present invention.

[Explanation of symbols]

 1 Disk Drive 2 Data Processing Section 3 I / O Interface 4 CPU (Control Means) 5 ROM 6 RAM (Storage Means) 7 Input Keyboard 8 Display Controller 9 VRAM 10 Display Device 11 Power Supply Circuit

Claims (3)

[Claims] 1. A storage means for storing progress data of a program for controlling reproduction of a CD-ROM disc, a power switch means, and a bookmarker switch means, wherein the storage means sequentially stores the progress data of the program. The CD-RO is set by the power switch means.
When the reproduction control of the M disc is stopped, the contents of the storage means are not preserved, but when the reproduction control of the CD-ROM disc is interrupted by the book marker switch means, the storage means is stored by the storage means. When the progress data of the program is saved and the reproduction control of the CD-ROM disc is restarted, the contents stored in the storage means are called to restore the reproduction control state of the CD-ROM disc to the state at the time of the interruption. A CD-ROM disc reproducing device characterized by being configured as follows. 2. The CD-ROM disc reproducing apparatus according to claim 1, wherein the storage means is supplied with backup power even when the power is turned off by operating the book marker means. 3. The storage means is a mounted CD-RO
The discriminating data of the M disc is also stored, and when the reproduction control of the CD-ROM disc is restarted, the discriminating data stored in the storage means and the currently mounted CD-
2. The reproduction control state of the CD-ROM disc is restored to the state at the time of the interruption after confirming that the discriminating data of the ROM disc matches. The described CD-ROM disc reproducing device.