KR19980058853A - How to set the mode in a digital video disc player - Google Patents

Abstract

The present invention relates to a mode setting method in a digital video disk player, comprising: (a) setting a mode according to a disc type of the optical disk player to a digital video disk (DVD) mode when the power is 'on'; (B) C _{2 which} occurs when error correction is not possible by starting reading and reading TOC (table of contents) data from the disc when loading the predetermined disc mounted in the disc tray and executing the focus to complete the focus (OK). Determining whether a P ₀ signal is detected; (C) stopping the reading of the TOC when the C ₂ P ₀ signal is detected in step (b), switching the mode to a video compact disk (VCD) mode, and returning to step (b); And (d) if the C ₂ P ₀ signal is not detected in step (b), waiting for key input after completing reading and storing of the TOC data.

Accordingly, the present invention provides an effect of quickly determining a disc type and setting a mode accordingly when a disc is loaded in a digital video disc player and executing a predetermined function such as play. have.

Description

How to set the mode in a digital video disc player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video disc player, and more particularly, to a digital video disc player for quickly setting a mode according to the type of a disc loaded in a digital video disc player, and for performing faster and easier playback of a function input later. It relates to a mode setting method.

With the development of video media, optical disc players have been developed for recording and reproducing audio and video signals as digital signals on semi-permanent optical discs.

On the other hand, such an optical disc player reproduces video and / or audio recorded on an optical disk and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional video and / or audio reproducing apparatus, thereby providing better image quality. And / or can reproduce signals with sound quality, generate no noise due to irregular reproduction and modulation, have very little distortion, no ghosts, and random access. There is a trend that is spreading.

In addition, such a conventional optical disk player includes a compact disk player (CDP), a laser disk player (LDP), a compact disk graphic player (CDGP) and a video compact disk player (CDGP). VCDP (video compact disk player), etc. In general, a compact disk player is a device that can play audio only, and a laser disk player, a compact disk graphics player, and a video compact disk player are devices that can play video and audio simultaneously.

Recently, a digital video disk (DVD) player using MPEG-2 moving picture compression technology has been developed, which includes a motion picture of a 12 cm optical disk, such as a current CD, or a DVD. It can record and play back gigabytes (GB) of data, and it is designed to be compatible with current CDs and VCDs.

On the other hand, in such a DVD player, in order to perform a predetermined function for a predetermined optical disc, for example, playback, first, the type of the disc mounted in the disc tray is determined and the DVD mode or the VCD mode ( CD or VCD).

In order to determine the type of such a disc, conventionally, once a disc mounted in a disc tray is assumed to be a DVD, the lead-in area on the disc is searched for the first sector of the lead-in area. If the data is '00h', it is determined by DVD and the mode is set to DVD mode. Otherwise, it is assumed that CD or VCD can be read and then it can be determined whether TOC (table of contents) data can be read. When the playback mode was set to VCD mode, there was a problem in that it took some time to determine the type of the disc mounted in the disc tray and to set the mode to execute a predetermined function.

Therefore, the present invention has been proposed to solve the above problems, and an object of the present invention is to determine the type of disc mounted in a digital video disc player more quickly and to execute a function such as faster playback by setting a mode appropriately. It provides a method of setting a mode in a digital video disc player.

In order to achieve the above object, the present invention provides a method for setting a mode according to the type of a disc to be loaded in a digital video disc player. Setting the mode to DVD (digital video disk) mode; and (b) loading a predetermined disk mounted in the disk tray and executing focus to complete the table of contents (TOC) data from the disk. Determining whether the C ₂ P ₀ signal generated when error correction is impossible by starting reading and reading of the signal; and (c) reading the TOC when the C ₂ P ₀ signal is detected in step (b). If the stop and and after switching the mode to a VCD (video compact disk) mode, further comprising: returning to step (b), (d) the (B) step in the C ₂ P ₀ signal is not detected After completing the reading and storage of TOC data group and a step of waiting for a key input.

1 is a schematic structural block diagram of a digital video disc player for practicing the present invention.

2 is a detailed flowchart of a mode setting method in a digital video disc player according to a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

5: key input unit 10: microcomputer

15: servo control unit 20: motor and motor drive unit

25: optical pickup section 30: RF amplifier section

35: digital signal processor 40: CD-ROM decoder

45: video decoder 50: audio decoder

55: Video D / A Converter 60: Audio D / A Converter

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a conventional DVD player for carrying out the present invention, and FIG. 2 is a detailed flowchart showing a mode setting method of a video disc player according to a preferred embodiment of the present invention.

As shown in FIG. 1, a typical DVD player for carrying out the present invention includes a key input unit 5, a microcomputer 10, a servo control unit 15, a motor and a motor driving unit 20, and an optical pickup unit 25. , RF (radio frequency) amplifier unit 30, digital signal processing unit 35, CD-ROM decoder 40, video decoder 45, audio decoder 50, video digital / analog (D / A) converter ( 55), and comprises an audio D / A converter (60).

The key input unit 5 includes a plurality of function keys for executing a predetermined function in the DVD player, and provides a key signal to the microcomputer 10 through the plurality of function keys, and the microcomputer 10 inputs the key input unit. A control signal according to the key signal provided from (5) is generated to the respective components to control a predetermined function to be executed. The microcomputer 10 includes a timer (not shown) and a memory (not shown). Is built.

The optical pickup unit 25 performs optical pickup from the disk D loaded in the disk tray (not shown), and outputs the RF signal read out accordingly to the RF amplifier unit 30.

In addition, the motor and the motor drive unit 30 drive the spindle motor (not shown) to rotate the disk D, and drive the pickup transport motor (not shown), the optical pickup unit 25 performs the optical pickup To read the data recorded on the disk D and output it as an RF signal.

The RF amplifier unit 30 amplifies an RF signal provided from the optical pickup unit 25 and provides it to the digital signal processing unit 35.

On the other hand, the digital signal processor 35 digitally processes the amplified RF signal provided from the RF amplifier unit 30 and performs error detection and error correction to the CD-ROM decoder 40 to provide a tracking error signal. And a focus error is detected and provided to the servo controller 15. When the error correction is not made in correcting the detected error, the digital signal processor 35 provides a C ₂ P ₀ signal to the microcomputer 10 to inform that the error correction cannot be performed.

The servo controller 15 provides a servo signal according to the focus and tracking error signal provided from the digital signal processor 35 to the motor and the motor driver 20 to drive the motor and the motor driver 20 to track and focus the servo. To be done.

The CD-ROM decoder 40 separates an error corrected bit stream type digital signal provided from the digital signal processor 35 into a video signal and an audio signal, and then the audio signal is the audio decoder 50. The video signal is output to the video decoder 45.

The audio decoder 50 decodes the audio signal encoded in the Dolby AC-3 scheme provided from the CD-ROM decoder 40 and provides the audio signal to the audio D / A converter 60. The audio D / A converter ( 60 converts the decoded digital audio signal provided from the audio decoder 50 into an analog signal and outputs it to a speaker (not shown).

The video decoder 45 decodes the digital video signal provided from the CD-ROM decoder 40 based on the MPEG-2 compression format, decodes the sub picture signal, and outputs it to the video D / A converter 55. The video D / A converter 55 converts the decoded digital video signal provided from the video decoder 45 into an analog signal and outputs it to a screen (not shown) for display.

On the other hand, according to the present invention, when a power key (not shown) provided in the key input unit 5 is operated by a user and a power key signal is provided, the microcomputer 10 generates a control signal accordingly and turns on the power. '(S10).

Thereafter, the microcomputer 10 sets the optical pickup unit 25 to the DVD mode via the motor and the motor driving unit 20 by generating a control signal to the servo control unit 15, and also the RF amplifier unit 30 and the digital signal. The control unit 35 generates a control signal to set the RF amplifier unit 30 and the digital signal processing unit 35 to the DVD mode (S20).

Then, the microcomputer 10 loads the disc mounted in the disc tray by driving the disc loading motor (not shown) built in the motor and the motor driving unit 20 through the servo control unit 15 (S30), and the optical pickup. The unit 25 is driven to execute focus of light on the disk (S40).

Thereafter, when the focus is completed (OK) through the digital signal processing unit 35 and the servo control unit 15 (S50), the microcomputer 10 has a spindle embedded in the motor and the motor driving unit 20 through the servo control unit 15. The motor (not shown) is driven to rotate the disk at a speed at which data can be read, and accordingly, the optical pickup unit 25 reads out TOC (table of contents) data representing the disk contents information from the disk (S60).

Then, the microcomputer 10 detects whether an error correction, that is, a C ₂ P ₀ signal is provided from the digital signal processing unit 35 indicating that the error signal cannot be corrected (S70). In this case, the digital signal processing unit 35 When the C ₂ P ₀ signal is supplied from the microcomputer 10, the microcomputer 10 generates a control signal to the servo controller 15 to drive the motor and the motor driver 20 to set the optical pickup unit 25 to the VCD mode. A control signal is generated by the RF amplifier unit 30 and the digital signal processor 35 to set the RF amplifier unit 30 and the digital signal processor 35 to the VCD mode (S80).

If the C ₂ P ₀ signal is not provided from the digital signal processing unit 35, the microcomputer 10 stores and sets the TOC data processed and provided by the digital signal processing unit 35 in the built-in memory (S90). When the storage setting is completed, the microcomputer 10 stops the operation of the motor, the motor driving unit 20, the optical pickup unit 25, and sets the digital video disk player to the key input standby state (S100).

Accordingly, the present invention provides an effect of quickly determining a disc type and setting a mode accordingly when a disc is loaded in a digital video disc player and executing a predetermined function such as play, thereby enabling a desired function to be executed more quickly. There is.

Claims (1)

In a digital video disc player, a method for setting a mode according to the type of disc being loaded, (A) setting a mode according to a disc type of the optical disc player to a digital video disk (DVD) mode when the power is 'on'; (B) C which occurs when error correction is not possible by starting reading and reading TOC (table of contents) data from the disk when the focus is completed by loading a predetermined disk mounted in the disk tray and executing focus. Determining whether a ₂ P ₀ signal is detected; (C) if the C ₂ P ₀ signal is detected in step (b), stopping reading of the TOC, switching the mode to a video compact disk (VCD) mode, and returning to step (b); And (d) if the C ₂ P ₀ signal is not detected in step (b), waiting for a key input after completing reading and storing the TOC data.