JPH0264966A - Optical disk reproducing device - Google Patents

Abstract

PURPOSE:To display image data at a high speed by actuating a restoring circuit with a control part, reading a signal from an optical disk and simultaneously transferring restoring processing and post-restoring data from an interface circuit part to an external personal computer. CONSTITUTION:A control part 10 actuates a restoring circuit part 7, reads data, which are written to a ring buffer 6, and writes restoring processing and post-restoring data 11 of the image data to a restoring data frame memory 8. When the personal computer is in a transferring receivable condition, the data in a transferring subject range 15 and the restored data are started to be transferred as transferring data 18 from an interface circuit part 9. Next, the reading of the same image data to the other range is requested from the personal computer, the stored contents of the restoring data frame memory 8 are immediately transferred to the personal computer. Thus, a time up to the display of the image data can be shortened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a system that uses a database that compresses information with a large amount of data such as image data and records it on a source disk such as a CD-ROM. The present invention relates to an original disc playback device suitable for building around a null combiator.

[Conventional technology]

Generally, a search system that uses image data compressed and recorded on a source disk such as a CD-ROM uses a dedicated device for restoring the compressed data. Therefore, the means for displaying a single image is to read compressed data from a CD-ROM, transfer the data from the drive device to the personal combiator, store it, transfer it to a dedicated device, restore it, and then display it on the dedicated display device. will be displayed. An example of this method can be found on page 77 of the January 1987 issue of Hitachi Review.

[Problem to be solved by the invention]

In the conventional method described above, the compressed image data is decompressed and restored using a dedicated device, but it is also necessary to use a dedicated display device for display. No consideration has been given to electronically transmitting and displaying the restored image data to a burner computer, and in order to construct an inexpensive crossbar system centered on a personal combinator, the system equipment is expensive or , there were problems such as a large number of data transfers and a long time required to display image data.

An object of the present invention is to display restored image data on the screen of a personal computer at a speed equal to or faster than a method using dedicated devices for data restoration and display.

[Means to solve the problem]

The above purpose is to connect a restoration circuit for the MMR compression method, etc. to the data bus line and co-roll signal line that connect the control section and interface circuit section, etc. inside the CD-ROM disk drive device, and to This is achieved by controlling the restoration process and transferring the restored data from the ink-face circuit section to an external personal combinator or the like at the same time as No. 1g is read from the original disk such as a ROM.

[Effect]

The restoration function added to the original disk drive MJ device, such as a CD-ROM, restores compressed data in parallel with reading data from the original disk such as a C'D-ROM, and sends the restored data to a personal combiator. Forward.

This allows the image data to be used and displayed on a personal computer.

〔Example〕

Hereinafter, one embodiment of the present invention is shown in FIGS. 1 and 2, and a conventional example of the equipment configuration of the image data display system is shown in FIG.
In Figure I43, the method according to the invention is illustrated and explained in Figure 8g4.

The configuration of the main functions of the embodiment is as shown in FIG.
Ring buffer 6 for compressed data, which is a feature of Honmeimei,
It consists of a restoration time wI section 7 and a restoration data frame memory 8. Restoration data memory 8 stores A4 size image data.
It has the size of a page. Logically, this corresponds to the dot data position as shown in FIG.

The compressed data recorded from the Z sector of X minutes Y seconds of CD-ROM disk 1 is restored and the coordinates (zl*y,)15
(at@, 3't) When displaying data inside the rectangle surrounded by ROM drive iron 1? Read it with CD-RO
It is sent to the personal computer 21 via the M interface cable 20 and stored at - time. After temporarily storing one page's worth of compressed data, it is transferred to the restoration device 24 via the GP-IB bus cable 25 for restoration processing. By writing the information into the storage, it is displayed on the high tank thin display 25, which is a dedicated display device.

At this time, I was on the 211th floor in the evening for a personal combination.
) It was done on the CRT display 22, which is a general-purpose display device, and since one page of image data was restored using the restoration device F124, the image data of Akane to be displayed was GP-IB.
It is necessary to transfer the compressed data in the reverse direction, that is, from the decompressing device 24 to the personal combiator 21 via the Baba sub 25, and store it in the display memory inside the personal combiator 21. However, according to the present invention, m
The compressed data recorded on the CD-ROM disk 1 having the configuration shown in FIG. 4 is read out and restored by the CD-ROM drive device 26 with a data restoration device internally configured as shown in FIG. By transferring the data to the personal combiator 21 via the CD-ROM interface cable 20 and storing it in its internal display memory, it is possible to display it on the CRT display 22.

Hereinafter, the operation of the data + IA feeding CD-ROM drive unit [26] will be explained in detail.

When a request to read image data is received from the personal combinator 21, the pickup s2 is operated to access the Z sector for X minutes and Y seconds.

When access is established, the data recorded on the CD-ROM discs 1 & C is horizontally compared in the pickup section 2, passed through the CD output section 5 and the CD-ROM processing section 4, and then written into the compressed data ring buffer 6. . Then, the control unit 10
starts the restoration circuit section 7, reads out the data stored in the ring buffer 6, performs restoration processing of the image data, and after restoration data 1 is restored at the coordinates (0°0) of the restored data frame memory 8. [Start convolution from 12. After restoration, the 1102nd byte of data is written to position 13 at $(8,0). After restoration, data 11 is stored in coordinates (xl
.

3't) Acknowledge position 16 and set the coordinates (0# yt + 1
) When the position 14 is reached, the control unit 10 informs the perennial combinator 21 via the interface circuitry 9 that the transfer is ready. If the personal combiator 21 is in a state where transfer can be accepted, the transfer target range 15
The data adjacent to the data to be restored is transferred from the interface circuit section 9 as transfer data for the first day. From the perspective of the user of the personal computer 21 and the system, the restoration process and the transfer of data after restoration are at the coordinates ("s+31t)" 1
The series of processing is completed when i17 is passed, but inside the drive device, the processing of each internal part continues until all the data for one page has been expanded and restored, and the image data for one page is processed. The data is stored in the restored data memory 8.

Next, when the personal computer 21 receives a read request for another range of the same image data, the CD
- Immediately transfer the stored contents of the restored data frame memory 8 to the personal computer 21 without performing processes such as reading, decompressing and restoring the ROM disk 1.

According to this embodiment, an arbitrary part of one page can be displayed on the display screen of a general purpose display device such as a personal computer.
- It can be read, transferred, and displayed in a time equal to the time required to read compressed data from a ROM disk.

〔Effect of the invention〕

According to the present invention, compressed data such as image data recorded on an optical disc such as a CD-ROI can be restored and displayed using expensive dedicated equipment such as a slider, a personal computer, etc., and its display device. It can be read out and displayed on each station.

Furthermore, the time required from the start of reading the CD-ROM disc to the end of display can be reduced by about 1.5 seconds compared to the time required by the conventional method.

As a result, it is possible to reduce the equipment cost of an image data retrieval system using an original disk such as a CD-ROM as a medium.

Furthermore, it has the effect of improving the work efficiency of system users.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a drive device such as a CD-ROM according to an embodiment of the present invention, and FIG. 2 is a diagram illustrating writing of image data into the restored 7" memory shown in FIG. 1. An explanatory diagram showing reading. , Fig. 5 is an explanatory block diagram of the conventional example, and Fig. 4 is an explanatory block diagram of the present invention.1...CD-ROM disk 6...Compressed data ring buffer 7...Restoration circuit section 8... Restored data frame memory 10... Control section 1 Fig. 32

Claims (1)

[Claims] 1. An image data restoration circuit is connected to the data bus line and control signal line that connect the control section and interface circuit section, etc., and the optical system detection circuit reads out the compressed and recorded signals on the optical disk and collects data such as error correction. processing, and under the same control unit,
An optical disc playback device characterized in that by simultaneously performing data restoration processing, the restored data is output from an interface circuit section.