JPH03259455A - Compact disk identification system - Google Patents

Abstract

PURPOSE:To check the setting of a prescribed compact disk automatically by collating an acquired final track number with the final track number of a compact disk designated by the software to discriminate whether or not the designated compact disk is set. CONSTITUTION:A final track number acquisition means 13 inquires about the final track number of a compact Disk set to a compact disk reproducing device 8. A discrimination means 14 compares the acquired final track number with the final track number of the compact disk designated by the software and discriminates that a wrong compact disk is set when both are in discordance and discriminates that the designated compact disk is correctly set when they are coincident with each other. Thus, the final track number is used even for a compact disk having no information area for managing its volume as an identification number equivalent to the volume. Thus, whether or not a pre scribed compact disk is set is automatically checked.

Description

[Detailed description of the invention] [Field of use in M industry]

The present invention relates to a compact disc identification method for detecting whether a desired compact disc is set in a system such as a CAI system in which a compact disc (CD) playback device is connected to an information processing device.

[Conventional technology]

2. Description of the Related Art As in the case of a CAI system, an audio output medium is connected to an information processing apparatus and an information processing apparatus support system is effectively constructed using audio. Typical output media that can be combined with an information processing device to output audio include a digital audio compact disc (CD-DA) and a compact disc read-only memory (CD-ROM). A CD-ROM that mainly contains text information and can also record audio.
Regarding this, a convention called High Sierra Formats (H3P) has been proposed as a standard definition for physical formats and logical file formats so that they can be controlled by information processing devices. According to this H3P,
One CD is called a volume, and if the contents are continuous across multiple CDs, the collection is called a volume set. An area for managing the files of this volume is provided in the disk space (Nikkei Byte magazine, published by Nikkei BP, August 1987 issue No. 8).
(See pages 6-101). Therefore, by using the volume management area, it is possible to easily identify whether the volume of the compact disc set in the CD-ROM drive playback device is correctly set. However, in CD-DA, although there are standard specifications such as the physical structure and signal processing method of compact discs, there is also a control data area that can identify and manage volumes like CD-ROMs. Not yet.

[Problem to be solved by the invention]

Therefore, in an information processing device such as a multi-functional work stage θ, when a compact disc is set in the CD-DA playback device in order to connect the CD-DA playback device and obtain audio output, the operator must It is necessary to check whether the correct compact disc required by the processing unit software has been inserted by making a sound and checking whether it matches the execution status of the software, and if it is incorrect, it is necessary to replace the compact disc. there were. For example, in the CAI system, when setting a compact disc that matches the courseware into the playback device, the execution device cannot automatically check whether the correct compact disc has been set.
After inserting the disc, the user had to play it back, listen to it, and judge whether the sound matched the progress of the courseware and the current screen display. . SUMMARY OF THE INVENTION An object of the present invention is to provide a compact disc identification method that can automatically check whether a compact disc that does not have an information area for volume management is set in a predetermined location.

[Means to solve the problem]

In order to achieve the above object, the compact disc identification method of the present invention, in a system in which a compact disc playback device is connected to an information processing device, queries the compact disc playback device for the last track number of the set compact disc. The final track number acquisition means that obtains the information compares the track number acquired by the final track number acquisition means with the final track number of the compact disc specified by the software of the information processing device, and confirms that the specified compact disc is compact. and determining means for determining whether or not the disc is set in the disc playback device.

[Effect]

In response to the command to check whether the compact disc has the correct number set in the compact disc playback device, the final track number obtaining means inquires of the compact disc playback device about the last track number of the compact disc set. . Compact disc playback devices have a function that allows you to obtain the last track number by seeking at the maximum value, so
This function checks the final track number and provides it to the determining means via the final track number obtaining means. The determining means compares the acquired final track number with the final track number of the compact disc designated by the software, and determines that the wrong compact disc is set when the two do not match. If they match, it is determined that the specified item is set correctly. According to the present invention, even if a compact disc does not have an information area for volume management, by using its final track number as an identification number corresponding to the volume, it can be automatically determined whether a specified compact disc has been set. You can check.

Embodiment FIG. 1 is a schematic block diagram showing an example of implementing the compact disc identification method of the present invention in a CA1 system by Works Steel. A system control unit 1 consisting of a CPU includes a CR7 display device 112 and a CRT control device 13 for displaying a screen, a keyboard 4 and a keyboard interface 5 for inputting characters, numbers, commands, etc., and a keyboard such as a mouse. A pointing device 6, a pointing device interface 7, a compact disc playback bag f18 for playing back and outputting audio signals from a CD specified by a learning program, audio devices 19 and 1 for converting the audio signals into audio, programs and necessary A storage device for storing data files! 11 and a storage device control bag W110 are connected. The system control section 1 has the function of a normal work stage window, and therefore a general window control section 1.
It also has 2. In addition, as a feature of the present invention, a final track number acquisition means 13 inquires about the final track number of the compact disc set in the compact disc playback device 8 and obtains that information;
The track number acquired by the final track number acquisition means 13 is compared with the final track number of the compact disc specified by the learning program (courseware) of the CAl system, and the specified compact disc is detected by the compact disc playback device! and determining means 14 for determining whether or not the value is set to 8. The final track number acquisition means 13 is a compact disc playback Hl!
This function is realized by a program that sends a command to the compact disc playback device 8 to inquire about the final track number of the CD currently set in the disc tray, and receives a response from the compact disc playback device 8. The program runs a compact disc number check (DCN) as one of the instructions for this authoring system.
It is provided as a command. Further, this workstation operates basic software, and its window control unit 12 realizes a user interface function using a window. FIG. 2 is an operational flow diagram for explaining the operation of this embodiment, and FIG. 3 is a diagram showing an example of a communication procedure between the system control section 1 of the workstation and the compact disc playback device 8. CD- of the compact disc playback device used in the present invention
The DA does not have an area for recording a volume identifier like a CD-ROM. Instead of identifying the volume of a compact disc using a volume identifier, the CDN command prepared as an instruction for execution by the authoring system is used. This command allows you to specify the final track number of the compact disc you want to check as an argument, and sets the final track number of the compact disc to a value unique to each compact disc when writing the audio software. By checking the final track number, it is possible to detect whether a compact disc having a desired track number is set on the disc tray of the compact disc playback device. Note that if a set includes multiple compact discs, the final track number must be different for each disc. If the length of the audio software is the same, the final track number will be the same on multiple compact discs, but in such a case, you can easily change the final track number by inserting dummy data during disc production. The numbers can be different. Hereinafter, a procedure for identifying a compact disc set in a disc tray of a compact disc playback device will be described. As shown in FIG. 2, when the learning program of the CAL system is executed, a window related to compact disc check is opened on the display screen, and when the user presses the disc check button, the final track number acquisition means 1
The functions of the CDN commands forming part 3 are activated and the compact disc (volume) identification procedure according to the present invention is started (step 1). Next, the final track number acquisition means 13 of the system control unit 1 of the Works Scene uses the R823 which is the communication path between the Works Scene and the compact disc playback device 8.
A command (communication procedure) to open the 2C channel is sent to the compact disc control unit 81. Then, the compact disc control unit 81 creates a channel between the work station and the compact disc recycling bag @8 from the received signal, and opens the channel by transmitting the status to the work stage (step 2). As shown in FIG. 3, communication between the work stage and the compact disc playback device is started when the R8232C channel is opened, and is ended when the channel is closed. The communication control unit consists of command transmission and reception and status transmission and reception, as shown in FIG. When the R8232C channel is opened, a signal for setting the initial data of the CD software is sent to the compact disc control section 81 (Step, B). After the above processing has been performed, the system control section 1 of the workstation checks the state of the channel between the workstation and the CD control section 81 (step 2). The state of the channel is the power on state of Compact Disc Recycling Bag @8, Compact Disc Recycling Bag! !
! 8 online state, the compact disc is set correctly, and the R8232C cable is correctly set. As a result of the check, if it is not opened, the window control unit 12 creates a confirmation window for the user and displays the CRT display! 2 (step ■). For example, a compact disc player! 8 is powered off, a message such as "The compact disc player is powered off" is displayed in the confirmation window. This message allows the user to
After turning on the power of the compact disc playback device 18, an instruction is given on the confirmation window to issue a channel open command, and the process returns to step (2). As a result of the check in step (2), if the channel is open, the process moves on to the procedure for obtaining the final track number of the compact disc. The final track number acquisition means 13 of the system control unit 1
extracting the final track number that serves as an identifier of the compact disc specified by the learning program, that is, the track number that is the argument of the CDN command;
It is applied to one input of the determining means 14 (step ■). In response to the command from the final track number acquisition means 13, the compact disc control section 81 controls the compact disc to seek with the maximum track number (99) (step 2). By seeking the compact disc using the highest track number in this way, you can obtain the track number of the last track on which audio software has been written. Then, the compact disc control section 81 transfers the obtained final track number to the final track number acquisition means 1 of the system control section 1.
3, and the final track number acquisition means 13 passes the received final track number to the determination means 14. The determining means 14 compares the final track number of the compact disc specified by the learning program with the final track number actually obtained from the compact disc reproducing device 8, and determines whether the two match (step 2). If there is a discrepancy, the compact disc drive playback section 82
A compact disc (C) of audio software set to
A message prompting you to replace the software (e.g. rC)
The window control section 12 displays a window with the message "D software number is incorrect" (step ■). The user sees this display and learns that a compact disc with a different number has been set incorrectly, and replaces it with the CD software that he or she thinks is correct. Then, the process returns to step (2) and repeats the procedure (steps (2) to (2)) for determining whether the correct CD software is set. When the determining means 14 determines that the final track number of the CD software designated by the learning program and the acquired final track number match, the identification procedure ends;
Move on to the next step in your learning program. In this embodiment, the determination means 14 is provided with its function in the system control section 14, but it may also be provided on the compact disc playback side.

Effects of the Invention According to the present invention, even if a compact disc does not have an information area for volume management, by using its final track number as an identification number corresponding to the volume, it is possible to determine whether a specified compact disc has been set. can be easily identified. Furthermore, by displaying the identification results, the user can easily know whether or not the appropriate compact disc is set, and can quickly take action if the wrong compact disc is set.

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing the configuration of an embodiment of the present invention. FIG. 2 is an operational flow diagram for explaining the operation of this embodiment. FIG. 3 is a diagram for explaining the communication procedure between the work stage 1 and the compact disc playback device. ■...System control unit/CPU, 2...CR7 display device, 3...CRT control device, 4...Keyboard,
5...Keyboard interface, 6...Pointing device, 7...Pointing device interface, 8...Compact disc playback device, 9...
Audio device, 11... Storage device. 10...Storage device control device, Figure 2

Claims (1)

[Claims] In an information system in which a compact disc playback device is connected to an information processing device, a final track number acquisition method for obtaining final track number information by inquiring the last track number of a compact disc set in the compact disc playback device. and a track number acquired by the final track number acquisition means and a final track number of the compact disc designated by software of the information processing device, and whether the designated compact disc is set in the compact disc playback device. 1. A compact disc identification method characterized by comprising a determination means for determining whether or not the disc is rejected.