KR19990039090A - How to select the video output mode of your digital video disc player - Google Patents

Abstract

The present invention relates to a method of selecting a video output mode of a digital video disc player. The present invention detects a television method of input MPEG data when a digital video disc is played. The encoder is controlled to be set in the NTSC method. If the television method of the MPEG data detection result is PAL, the encoder is controlled to be set in the PAL method. The television method of the video encoder which is automatically changed and set by the control of the central processing unit is set. By operating the key panel to match the video output system of the TV and the TV, the video output system of the TV can be set so that the disc can be played regardless of the TV system, and the user directly operates the key panel to set the TV system. And to eliminate roum.

Description

How to select the video output mode of your digital video disc player

The present invention relates to a digital video disc player, and more particularly, to a video output mode selection method of detecting a format method of a reproduced video signal and outputting a video signal according to the detected format method.

In general, a video player or a digital video disc player (DVD-P) plays a video signal and outputs it to a TV or a monitor. The transmission method of the reproduced video signal is NTSC (National Television System Committee) method. It is classified by PAL (Phaser Alternation Line) method. NTSC matrix transforms R, G, and B signals into one luminance signal (Y) and two chrominance signals (I, Q), and then modulates the subcarriers with a frequency of 3.58 MHz in the video band with two chrominance signals. In this case, the complex signal obtained by adding the modulated color difference signal and the luminance signal is modulated and transmitted by a carrier having a higher frequency. In addition, the PAL method transmits a color subcarrier of 4.43 MHz as a color difference signal by performing quadrature two-phase modulation in addition to the luminance signal. A signal obtained by modulating one color difference signal is transmitted by inverting polarity for each scan line.

1 is a block diagram of a conventional digital video disc player.

As shown, a key panel 2 for receiving a user's operation signal for operating the digital video disc; A central processing unit (3) for receiving a user's manipulation signal through the key panel (2) and controlling the overall operation of the digital video disc; A digital signal processor (4) for decoding the signal picked up from the digital video disk (1) and outputting the MPEG data; An MPEG decoder 5 which decodes MPEG data output from the digital signal processor 4 and outputs the MPEG data as a video signal and an audio signal; A caption processing unit (6) for outputting captions to the television (10) under the control of the central processing unit (3); NTSC / PAL operating in accordance with the video output method set by the user's operation to select the video signal output method so that the video signal is output from the digital video disc player in accordance with the format method of the television 10 displaying the video signal. A mode selection switch 7; The caption data output from the caption processing unit 6 and the video signal output from the MPEG decoder 5 are encoded according to the format of the television system selected through the NTSC / PAL method selection switch 7 to the television 10. It consists of a video encoder 8 that transmits.

A conventional video output mode selection method operating in the digital video disc player configured as described above is as follows.

First, the video output method of the digital video disc 1 is set from the outside so as to check the format method of the television 10 and to match the television method of the output video signal of the digital video disc player with the format method of the television 10. do.

When the digital video disc 1 is manipulated to be reproduced, the central processing unit 3 controls to read a signal from the digital video disc 1 through a pickup operation. Thus, the digital signal processor 4 decodes the signal read from the digital video disk 1 and outputs the MPEG data, and the MPEG decoder 5 decodes the MPEG data and outputs the video signal and the audio signal. . The central processing unit 3 then controls the NTSC / PAL system selection switch 7 to operate according to the television system signal selected from an external user. In this case, it is assumed that the signal is set in the NTSC method, and the NTSC / PAL method selection switch 7 sets the video signal to be output in the NTSC method format. The video encoder 8 then encodes the video signal output from the MPEG decoder 5 into the NTSC format selected by the NTSC / PAL scheme selection switch 7 and transmits it to the television 10.

Therefore, in the conventional video output method selection method of the digital video disc player, the video output of the digital video disc player in order to match the format method of the digital video disc player to reproduce and output the video signal to the format method of the television that displays the video signal There was a hassle of manipulating the method selection operation by the user.

In addition, the conventional video output method of the digital video disc player has been configured to operate in one output mode of the NTSC method or PAL method, so if the NTSC type digital video disc player can play only digital video discs stored in the NTSC method, PAL method Digital video discs stored in the network cannot be played back, so there were many restrictions on playing digital video discs.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and in particular, by detecting a format method of a reproduced video signal and converting and outputting a video output method according to the detected format method. Accordingly, the present invention provides a method of selecting a video output mode of a digital video disc player which automatically outputs a video signal.

In order to achieve the above object, the present invention (method) is,

A television system detecting step of detecting a television system of the MPEG data input when the disk is played; A television method setting step of controlling to set the video encoder to the NTSC method if the detection result is the NTSC method, and to set the video encoder to the PAL method if the detection result is the PAL method; The method is characterized in that it comprises a television system matching operation step of setting the video output system of the television by manipulating the key panel so as to match the television system set in the video encoder.

1 is a block diagram of a conventional digital video disc player;

2 is a block diagram of a digital video disc player to which the present invention is applied;

3 is a flowchart showing a method of selecting a video output mode of a digital video disc player according to the present invention;

<Explanation of symbols for main parts of the drawings>

20: digital video disc 21: key panel

22: central processing unit 23: digital signal processing unit

24: MPEG decoder 25: subtitle processing unit

26: Video Encoder 30: TV

Hereinafter, the configuration and operation of an embodiment according to the technical spirit of the present invention "method of selecting a video output mode of a digital video disc player" will be described in detail with reference to the accompanying drawings.

<Example>

First, the digital video disc player to which the present invention is applied comprises: a key panel 21 for receiving a user's operation signal for operating the digital video disc as shown in FIG. 2; Receives a user's operation signal through the key panel 21, controls the overall operation of the digital video disc, monitors the MPEG decoder 24 to monitor the video according to the video output method detected by the MPEG decoder 24. A central processing unit 22 for setting an output method; A digital signal processor 23 which decodes the signal picked up from the digital video disc 20 and generates the MPEG data; An MPEG decoder 24 that analyzes MPEG data output from the digital signal processor 23 to determine whether NTSC data or PAL data is used; A caption processing unit (25) for outputting captions to the television (30) under the control of the central processing unit (22); The video encoder 26 encodes the video signal output from the MPEG decoder 24 and transmits the video signal to the television 30 according to the video output method set by the central processing unit 22.

In the video output mode selection method according to the present invention operated in the digital video disc player configured as described above, as shown in FIG. 3, the television method detecting step of detecting the television system of the MPEG data input when the disc 20 is played ( ST10-ST12); A television method setting step (ST13-ST15) of controlling to set the video encoder (26) to the NTSC method if the detection result is the NTSC method, and to set the video encoder (26) to the PAL method if the detection result is the PAL method; A television system matching operation step (ST16) is performed in which the key panel is operated to match the television system set in the video encoder 26 to set the video output system of the television.

Referring to the video output mode selection method of the digital video disc player according to the present invention as described above is as follows.

First, when the digital video disc 20 is played by operating the key panel 21 (ST10), the central processing unit 22 picks up a signal from the digital video disc 20 and inputs it to the digital signal processing unit 23 ( ST11), the received digital signal processor 23 decodes and outputs the MPEG data. The MPEG decoder 24 then analyzes the MPEG data to determine whether the data is NTSC data or PAL data (ST12).

As a result of this determination, if the data is formatted in the NTSC format, the central processing unit 22 transmits the NTSC format setting signal to the video encoder 26 to output the video signal in the NTSC format (ST13-ST14). Thus, it is possible to play back the NTSC disc or the PAL disc according to the method.

After this, the monitor of the television 30 displaying the video signal is checked to check the video output system. Thus, if the video output method of the television 30 is not NTSC, the menu panel is operated by operating the key panel of the television 30, and the video output method of the television 30 is changed to that of the video encoder 26 in the digital video disc player. The NTSC system is set to match the NTSC television system (ST16).

Also, if the MPEG data is analyzed and the PAL method is used, the central processing unit 22 transmits the PAL method setting signal to the video encoder 26 so that the PAL method video signal is transmitted to the television 30 (ST15). The key panel of the television 30 is operated to match the video output method of the television 30 displaying the video signal with that of the video encoder 26 in the digital video disc player (ST16). Thus, by detecting the television system of the data read from the digital video disk 20, the video output mode is automatically changed according to the detection result, and the video signal is output.

As described above, the present invention "method of selecting a video output mode of a digital video disc player" particularly includes a television method by detecting a format method of a reproduced video signal and converting the video output method according to the detected format method. The effect is that the video disc can be played without restrictions.

In addition, by detecting the television format method of the reproduced video signal and automatically converts the video output method according to the detection result, there is an effect of eliminating the user having to set the video output method directly.

Claims (1)

In a video output method for outputting a video signal of a digital video disc player, A television system detecting step (ST10-ST12) for detecting the television system of the input MPEG data when the disk 20 is played; A television method setting step (ST13-ST15) of controlling to set the video encoder (26) to the NTSC method if the detection result is the NTSC method, and to set the video encoder (26) to the PAL method if the detection result is the PAL method; Selecting the video output mode of the digital video disc player, comprising the step of matching the TV system by setting the video output system of the television by operating the key panel so as to match the television system set in the video encoder 26. Way.