KR19990050084A - How to switch the playback direction of optical discs and optical disc players - Google Patents

Abstract

The present invention relates to an optical disc player, comprising: a direction discrimination area for recording recording direction information on a direction in which the video or audio data is recorded to reproduce both an optical disc recorded forward and an optical disc recorded backward; A first step of setting an optical disc including a program area in which the video or audio data is recorded, and a reproduction direction of the optical disc player in a predetermined standard direction of forward or reverse direction; A second step of reading recording direction information recorded on the optical disc; On the basis of the recording direction information read out in the second step, if the direction in which data is recorded on the optical disc coincides with the standard direction, it is maintained as it is; By providing a reproduction direction switching method of the optical disc player comprising three steps, there is an effect that can improve the performance and efficiency of the optical disc player.

Description

How to switch the playback direction of optical discs and optical disc players

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc player, and more particularly, a disc having a direction discrimination area in which information on a recording direction of a disc is recorded, and a playback direction of an optical disc player is forwarded by using such a disc. Or an optical disc and an optical disc player configured to switch to reverse playback.

In general, optical disc players include compact disk players (CDPs), laser disk players (LDPs), compact disk graphic players (CDGPs), and video compact disk players (VCDPs). video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It can record and play back gigabytes (GB) of data including moving images on a 12cm optical disc such as a CD, and it is also designed to be compatible to play current CDs and VCDs.

Such an optical disc player has been developed to record and reproduce image and audio data on a semi-permanent optical disc as audio and video media have developed.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce the signal with sound quality, it does not generate noise due to irregular reproduction and modulation, very low distortion, no ghost and random access, so it is rapidly developed and widely distributed. There is a trend.

On the other hand, the optical disc mounted in the above-described optical disc player can be classified into a forward disc in which data is recorded from the inner circumference to the outer circumference and a reverse disc recorded in the outer circumference.

In a conventional optical disc player, only one type of a forward disc or a reverse disc can be reproduced. For compatibility with each other, the data recording direction of the optical disc is determined and the playback direction is actively switched in response to the determined data. What is needed is an apparatus or method that can do this.

SUMMARY OF THE INVENTION The present invention has been made to meet the above-described necessity, and an object of the present invention is to provide a disc having a direction discrimination area for recording information on a recording direction in which data is recorded, and information about a recording direction recorded in the direction discrimination area. There is provided a playback direction switching method of an optical disc player which draws out and switches the playback direction corresponding to information on the extracted recording direction.

According to an aspect of the present invention for achieving the above object, in an optical disc in which predetermined video or audio data is recorded by a laser beam, direction determination in which recording direction information with respect to a direction in which the video or audio data is recorded is recorded. domain; An optical disc including a program area in which the video or audio data is recorded is provided.

On the other hand, in another aspect of the present invention for achieving the above object, predetermined video or audio data is recorded in the forward direction from the inner circumference to the outer circumference, or recorded in the reverse direction from the outer circumference to the inner circumference, and the recording direction with respect to the recording direction. A reproduction direction switching method of an optical disc player for switching a reproduction direction corresponding to a recording direction of the optical disc when playing an optical disc in which information is recorded, wherein the reproduction direction of the optical disc player is set to a predetermined standard direction in the forward or reverse direction. First step; A second step of reading recording direction information recorded on the optical disc; On the basis of the recording direction information read out in the second step, if the direction in which data is recorded on the optical disc coincides with the standard direction, it is maintained as it is; A playback direction switching method of an optical disc player comprising three steps is provided.

1 is an exemplary view showing a conceptual structure of an optical disc according to an embodiment of the present invention;

2 is a block diagram showing hardware for implementing a playback direction switching method of an optical disc player according to the present invention;

3 is a detailed flowchart showing a playback direction switching method of an optical disc player according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: direction determination area 20: program area

100: key input unit 200: system control unit

300: optical disk player 400: storage unit

The above and other objects and advantages of the present invention will be apparent from the following description with reference to the accompanying drawings.

Hereinafter, a method of switching playback directions of an optical disc and an optical disc player according to the present invention will be described with reference to FIGS. 1 to 3.

1 is an exemplary view showing a conceptual structure of an optical disc according to an embodiment of the present invention, Figure 2 is a block diagram showing the hardware for implementing the playback direction switching method of the optical disc player according to the present invention, 3 is a detailed flowchart showing a playback direction switching method of an optical disc player according to an embodiment of the present invention.

First, referring to FIG. 1, it can be seen that an optical disc according to the present invention includes a direction determining area 10 and a program area 20. Hereinafter, the functions of the direction determination area 10 and the program area 20 will be described.

First, the direction determination area 10 is an area in which recording direction information indicating whether data is recorded in the forward direction from the inside of the optical disc to the outer circumference or in the reverse direction from the outer circumference of the optical disc to the inner circumference is stored. The recording direction format should be standardized to record in the same direction regardless of the disc recorded in the reverse direction.

That is, if the direction discrimination region 10 is normalized in the forward direction, the optical disc in which data is recorded in the forward direction is forwarded to both the recording direction information recorded in the direction discrimination region 10 and the audio or video data recorded in the program region 20 in the forward direction. Although recorded, the optical disc in which data is recorded in the reverse direction will record the recording direction information in the forward direction, and video or audio data will be recorded in the reverse direction.

On the other hand, if the direction determination area 10 is normalized in the reverse direction, the optical disc in which data is recorded in the forward direction is recorded in the reverse direction, the recording direction information is recorded in the reverse direction, while the optical disc in which the data is recorded in the reverse direction is recorded. Both direction information and video or audio information will be recorded in the reverse direction.

The reason for standardizing the recording direction format of the direction determination area 10 described above in the present invention is that if the recording direction of the optical disc mounted on the deck of the optical disc player differs from the reproduction direction set in the optical disc player, the direction determination area 10 This is because the recorded direction information cannot be read out, and according to the present invention, the recording direction format of the direction discrimination region 10 of the reverse disc and the forward disc described above and the initial reproduction direction format of the optical disc player are the same. Even if is mounted, it will be possible to initially read the recording direction information.

In the program area 20, a program consisting of predetermined image data and audio data is stored. The data is recorded in the direction from the innermost to outermost circumference of the program area 20 according to the type of the optical disk, or the program area 200 is stored in the program area 200. Data will be recorded from the outer circumference to the innermost circumference.

On the other hand, referring to Figure 2, Figure 2 is a hardware for implementing the playback direction switching method of the optical disk player according to the present invention is a key input unit 100, system control unit 200, optical disk player 300, storage unit 400 ), And the functions of each component are as follows.

First, the key input unit 100 includes a plurality of function keys including a playback key, and generates and provides a key signal corresponding to a user's key operation to the system controller 200.

The system controller 200 controls the overall optical disc player 300 in response to an input signal applied from each of the constituent members constituting the key input unit 100 and the optical disc player 300, and in particular, the deck of the optical disc player 300 ( When the optical disc is mounted (not shown), the reproduction direction of the optical disc player 300 is set to the standard direction. At this time, the optical disc mounted on the deck part (not shown) of the optical disc player 300 is an optical disc in which recording direction information is recorded in the direction determining area 10 according to the present invention. Further, the standard direction is the same direction as the standardized recording direction format of the optical disc direction determining area 10, and may be either in the reverse direction or the forward direction.

The optical disc player 300 reads the recording direction information contained in the direction determination region 10 under the control of the system control unit 200 and provides the information to the system control unit 200, and the video and audio recorded in the program area 20 of the optical disc. The data is played back in the forward or reverse direction.

The storage unit 400 may store information on the rotational direction of the spindle motor (not shown) and the initial moving position of the optical pickup unit (not shown) according to the playback direction of the optical disc player 300.

Hereinafter, a process of implementing the reproducing direction switching method of the optical disc player according to the present invention in hardware consisting of each of the constituent members performing the above-described functions will be described in detail with reference to FIG. 3. At this time, in the preferred embodiment of the present invention, an example in which the recording direction format of the direction discrimination region 10 provided in the optical disc and the reproduction standard direction of the optical disc player are normalized in the forward direction will be described.

First, when an optical disc is mounted on a deck (not shown) provided in the optical disc player 300 (S 10), the system controller 100 sets the reproduction direction of the optical disc player 300 to a forward direction which is a preset standard direction. (S 20). That is, the information on the forward direction stored in the storage unit 400 is taken out, and the rotation direction of the spindle motor (not shown) for rotating the optical disc is set corresponding to the forward direction with reference to the extracted information. An optical pickup unit (not shown) for reading data recorded on the optical disc is set to move to the innermost circumference of the direction determining region 10 and the program region 20 during the initial operation.

If the reproduction direction of the optical disc player 300 is set in the forward direction in step S 20, the system controller 200 controls the optical disc player 300 to read recording direction information contained in the disc determination area 10 of the optical disc. .

The optical disc player 300 rotates the spindle motor (not shown) in the forward direction under the control of the system control unit 200, and moves the optical pickup unit (not shown) to the innermost circumference of the direction determination area 10. Subsequently, the optical pickup unit (not shown) is sequentially moved from the innermost to outermost circumference of the tracks formed in the direction discrimination region 10, and the recording direction information stored in the direction discrimination region 10 is read out to read the information. The recorded direction information is provided to the system control unit 200. (S30) At this time, since the recording direction information is recorded in the direction determining area 10 in the forward direction, the optical disc player 300 reproduces in the forward direction to record the recording direction. You will be able to read the information.

Thereafter, the system controller 200 determines whether video or audio data is recorded in the program area 20 of the optical disc in the forward direction with reference to the recording direction information read by the optical disc player 300 in step S30. (S 40)

As a result of the determination in step S40, if video or audio data is recorded in the program area 20 in the forward direction, the system control unit 200 maintains the playback direction of the optical disc player 300 currently set in the forward direction. S 50)

On the other hand, if it is determined in step S40 that the video or audio data is recorded in the program area 20 in the reverse direction, the system controller 200 switches the playback direction of the optical disc player 300 currently set in the forward direction in the reverse direction. do. That is, the information on the reverse direction stored in the storage unit 400 is taken out, and the rotation direction of the spindle motor (not shown) for rotating the optical disc is switched in a direction opposite to the forward direction with reference to the extracted information. The optical pickup unit (not shown) is set to move to the outermost periphery of the program area 20 when reading data recorded in the program area 20 of the optical disc.

Thereafter, when the reproduction direction of the optical disc player 300 is set in step S50 or step S60, the system controller 200 waits for a key signal from the key input unit 100 (S70).

Therefore, by the above-described process of steps S 10 to S 70, the optical disc player 300 may read data recorded on the disc in correspondence with the recording direction of the desk mounted on the deck (not shown).

According to the present invention described above, it is possible to reproduce both the optical disk in which data is recorded in the forward direction and the optical disk in which data is recorded in the reverse direction in one system, thereby improving the performance and efficiency of the optical disk.

Claims (3)

In a forward optical disk in which predetermined video or audio data is recorded from the inner circumference to the outer circumference by a laser beam, or a reverse optical disk recorded from the outer circumference, A direction discrimination area in which recording direction information on a direction in which the video or audio data is recorded is recorded; An optical disc comprising a program area in which the video or audio data is recorded The optical disc according to claim 1, wherein the direction discrimination area formed on the reverse optical disc and the forward optical disc normalizes the recording direction of the recording direction information to either forward or reverse direction. When a video or audio data is recorded in the forward direction from the inner circumference to the outer circumference, or recorded in the reverse direction from the outer circumference to the inner circumference, and recording direction information on the recording direction is recorded, the recording direction of the optical disk corresponds to the recording direction of the optical disk. A playback direction switching method of an optical disc player for switching the playback direction by A first step of setting a reproduction direction of the optical disc player to a predetermined standard direction in the forward or reverse direction; A second step of reading recording direction information recorded on the optical disc; On the basis of the recording direction information read out in the second step, if the direction in which data is recorded on the optical disc coincides with the standard direction, it is maintained as it is; A playback direction switching method of an optical disc player comprising three steps.