KR19990086269A - How to access specific location on disk with multiple tracks - Google Patents

Abstract

The present invention relates to a method of accessing a specific position of a disc having multiple tracks, and more particularly, to a method applied when directly accessing a specific position of an optical disc having a larger number of tracks than the number of tracks that can be stored in a memory by the microcomputer. Determining whether the direct access is input after reading the track information, and if so, executing the access operation by [destination time-current position time] (S1-S4); If direct access is not input, determining whether track-level access is input, and if so, accessing the track head and reading and playing track information (S5-S7); Performing other operations (S8) when no track unit access is input; Thereafter determining whether or not the access has ended, reading the current track number, accessing the current track head, and reading the current track information (S9-S12); Determining whether or not the reading of the information is completed and accessing and playing back to the destination time (S13-S15); Thereafter, it is determined whether the access is terminated, and when the access is terminated, the access is terminated (S16).

Description

How to access specific location on disk with multiple tracks

The present invention relates to a method of accessing a specific position of a disc having multiple tracks, and more particularly, to a method applied when directly accessing a specific position of an optical disc having a larger number of tracks than the number of tracks that can be stored in a memory by the microcomputer. will be.

In the conventional optical disc player, in the direct access method of accessing and playing back the target position after reading all the information of the track from the beginning of the track to be played, when accessing the position after the track number that can be stored in the memory, However, since the microcomputer cannot calculate the track number corresponding to the target position, there is a problem that the microcomputer cannot directly access the target position.

The present invention is to solve the above-mentioned shortcomings, and to control to read the information from the head of the track of the destination to be accessed directly, so that the track corresponding to the target position after the track stored in the memory can be accessed. We want to provide an access method.

In the present invention, the microcomputer determines whether the direct access has been input from the key input unit, and if the microcommunication is input, executes the access operation, determines whether the access to the destination is completed, and terminates the access. If no direct access has been entered, the microcomputer reads the track number at the current position and stores it in memory, accesses it to the beginning of the current track, reads the track's information from the beginning of the current track and stores it in memory and matches the track's information. After switching to the playback board to access the destination to be accessed directly, the microcomputer determines the completion of the access, executes the playback operation, and is performed by such steps.

1 is a block diagram of an optical disc reproducing apparatus of the present invention;

Figure 2 is a process of directly accessing the target position of the disk of the present invention

Degrees shown,

Figure 3 is a process of directly accessing the target position of the disk of the present invention

Signal flow diagram shown.

<Description of Symbols for Major Parts of Drawings>

10: key input unit 20: microcomputer

30 memory 40 output unit

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an optical disc reproducing apparatus of the present invention. As shown in FIG. 1, a key input unit 10 for inputting an external access signal and a key input unit 10 determine whether or not an access signal is input. After the microcomputer 20 performs an operation and determines whether or not it is completed, the memory 30 that stores track information of the head of the current disc track read by the microcomputer 20, and the microcomputer 20 determines that access is completed. It is composed of an output unit 40 for performing a regeneration operation, the operation and effects thereof will be described in detail with reference to FIG.

In the case of directly accessing a specific position of an optical disc having more tracks than the number of tracks stored in the microcomputer 20, the microcomputer 20 determines whether direct access has been input from the key input unit 10, In this case, the microcomputer 20 executes an access operation by [destination time-present position time].

In addition, after determining whether the access to the destination is completed by the microcomputer 20, the access is terminated, and the microcomputer 20 reads the track number at the current position and stores it in the memory 30 to access the head of the current track. .

In addition, the microcomputer 20 reads the track information from the head of the current track and stores it in the memory 30, switches to a playback mode that matches the track information, accesses the destination to which the microcomputer 20 directly accesses, and the microcomputer 20 Determines that the access has been completed, and executes the playback operation.

In addition, the above operation is operated in accordance with the operation sequence shown in FIG.

3 is a signal flow diagram of directly accessing a target position of a disc of the present invention, after reading track information, determining whether direct access is input, and if so, executing the access operation by [destination time-current position time] ( S1-S4), and if direct access is not input, determining whether access in track units has been entered, accessing the track head and reading and playing track information (S5-S7) if access is made in track units. If it is not input, perform other operations (S8), and if it is determined that the access ends afterwards, read the current track number, access to the current track head, and read the current track information (S9-S12). And determining whether or not the reading of the information is completed and accessing and playing back to the destination time when the reading is completed (S13-S15). Step S16 is made.

As described above, the present invention has the effect of easily finding the track corresponding to the target position after the track that the memory can store by controlling the information to be read from the head of the track of the destination to be directly accessed. It is an invention.

Claims (1)

Determining whether direct access has been input after the microcomputer reads the track information, and if so, executing the access operation by [destination time-current position time] (S1-S4); If direct access is not input, determining whether track-level access is input, and if so, accessing the track head and reading and playing track information (S5-S7); Performing other operations (S8) when no track unit access is input; Thereafter determining whether or not the access has ended, reading the current track number, accessing the current track head, and reading the current track information (S9-S12); Determining whether or not the reading of the information is completed and accessing and playing back to the destination time (S13-S15); The method of accessing a specific position of a disk having a plurality of tracks, comprising the step of terminating the access (S16) after determining whether the access is terminated.