KR20050046980A - Video output device of dvd player - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal output device of a DVD player, and more particularly, to a scan converter for converting a video signal of a DVD decoder into an interlaced scan or a progressive scan method, and to separate the video signal from the scan converter into a composite and component signal. A signal separation section, a switching section for outputting a composite signal or only a luminance signal according to the television selection signal, and controlling the level of the television selection signal depending on whether the television connected to the DVD player is an analog or digital television. And a DVD control unit for outputting a luminance signal to the composite output unit through the switching unit, and outputting a composite signal to the composite output unit in the case of a digital television. Therefore, the present invention provides a luminance signal through the composite connector when the DVD player is in the progressive scan mode, and provides a component signal through the component connector so that the screen can be displayed on a general analog television that does not support progressive scan output. The video image screen may be output without being blanketed.

Description

Video signal output device of DVD player {VIDEO OUTPUT DEVICE OF DVD PLAYER}

The present invention relates to a DVD player, and more particularly, to a video signal output device of a DVD player.

Progressive scan conversion method applied to DVD players is a scan method that sprays each line in order without dividing the odd and even lines from the top to the bottom of the screen. A typical interlace scan alternates the scan lines, first with odd lines and then even lines. Therefore, since the progressive scan method shows 60 frames per second and the interlaced scan shows 30 frames per second, the video signal whose horizontal frequency is doubled by the progressive scan is called 2H. The video signal is classified as 1H. Therefore, the high-definition video image can be supported in a digital television (HDTV) by the progressive scan conversion of such a DVD player.

Fig. 1 is a block diagram showing a video signal output device of a DVD player according to the prior art, which is a composite connection device 20 and a component as a video connection device between a DVD player 10 and a television (TV) 30. (component) connecting device 22 is provided.

The DVD player 10 includes a key input unit 11 for receiving various key switches or remote control signals, a DVD deck 12 for reproducing data by playing a DVD optical disc, and a DVD control unit for performing overall control of the DVD player ( 13), a DVD decoder 14 which decodes the compressed data read from the DVD deck 12 to separate the video and audio signals, and converts the scanning method of the video signal according to the interlaced scan or progressive scan mode of the DVD. A scan converter 15 to separate the composite signal and the component signal from the 1H or 2H video signal converted into the interlaced or progressive scan, and an output to output the composite signal and the component signal, respectively. And parts 17 and 18.

In this case, the composite signal is a color signal (C = Pr-Y + Pb-Y) obtained by combining two color difference signals (Pr-Y and Pb-Y) and a luminance signal (Y) (Y + C). Refers to. The component signal refers to the luminance signal Y, the blue signal Pb, and the red signal Pr in the video signal.

In the conventional DVD player 10, a composite signal (Y + C) of a DVD video signal is transmitted to a television (TV) 30 through a composite signal connecting device 20, and a television (TV) is connected through a component signal connecting device 22. The component signals (Y, Pb, Pr) of the DVD video signal are transmitted to the 30. However, in the interlaced scan mode of the DVD player 10, the composite signal Y + C of the 1H video signal is transmitted to the television 30 through the connection device 20. However, in the progressive scan mode, the composite signal (Y + C) of the 2H video signal is not transmitted, and only the component signals (Y, Pb, and Pr) are transmitted to the television (TV) 30.

Therefore, the DVD player 10 according to the related art is connected to a general analog television and not to a television (TV) 30 that does not support progressive scan, that is, a digital television (HDTV) and is in the progressive scan mode. In this case, the component signals (Y, Pb, Pr) are transmitted, but the composite signals (Y + C) are not transmitted, so that the screen of the analog television (TV) 30 is blanketed so that the video image is not visible at all.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switching unit for outputting a luminance signal of a composite signal in a 2H video signal according to a television selection signal in a progressive scan mode in a DVD player. The present invention provides a video signal output device of a DVD player for outputting a video image screen by a luminance signal instead of a blank screen generated when the television is in the progressive scan mode of the DVD player.

In order to achieve the above object, the present invention provides a DVD decoder comprising: a DVD decoder for decoding video and audio signals by decoding compressed data read from a DVD deck; and a DVD decoder according to an interlaced scan or progressive scan mode of a DVD. A scan converter for converting the video signal scanning method, a signal separator for separating the composite signal and the component signal from the video signal transmitted from the scan converter, and outputting a composite signal or a luminance signal from the composite signal according to the television selection signal A switching unit for switching only outputs, an output unit for outputting a composite signal or a luminance signal of the switching unit, or a component signal for a signal separation unit, and a level of the television selection signal depending on whether the television connected to the DVD player is an analog television or a digital television Control W outputs the luminance signal to composite output for through the analogue television, if the switching and includes a DVD control unit to control so as to output a composite signal to composite output for through switching unit when the digital television.

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

2 is a block diagram showing a video signal output apparatus of a DVD player according to the present invention. Referring to FIG. 2, the present invention includes a DVD player 100, a television (TV) 120, and a composite connection device 110 and a component connection device 112 as video connection devices.

The DVD player 100 includes a key input unit 101 for receiving various key switches or remote control signals, a DVD deck 102 for reproducing data by playing a DVD optical disc, and a DVD control unit for performing overall control of the DVD player ( 103, a DVD decoder 104 that decodes the compressed data read from the DVD deck 102, and separates the video and audio signals, and converts the scanning method of the video signal according to the interlaced scan or progressive scan mode of the DVD. A scan conversion section 105, a signal separation section 106 that separates a composite signal and a component signal from a 1H or 2H video signal converted into an interlaced or progressive scan, and a composite signal according to the television selection signal S A switching unit 107 for outputting (Y + C) or for outputting only the luminance signal Y from the composite signal (Y + C), and a composite signal (Y + C) or luminance signal of the switching unit 107. And an output unit 108, 109 for outputting the call Y or for outputting the component signals Y, Pb, Pr of the signal separation unit 106.

In this case, the composite signal is a color signal (C = Pr-Y + Pb-Y) obtained by combining two color difference signals (Pr-Y and Pb-Y) and a luminance signal (Y) (Y + C). Refers to. The component signal refers to the luminance signal Y, the blue signal Pb, and the red signal Pr in the video signal.

In the video signal output device of the DVD player of the present invention configured as described above, the composite signal (Y + C) of the DVD video signal of the DVD player 100 is connected to the television (TV) 120 through the connection device 110 for the composite signal. The component signals (Y, Pb, Pr) of the DVD video signal are transmitted to the television (TV) 120 through the component signal connection device 112.

In the interlaced scan mode in the DVD player 100 of the present invention, the composite signal (Y + C) of the 1H video signal is transmitted to the television (TV) 120 through the connection device 110.

Furthermore, in the progressive scan mode in the DVD player 100 of the present invention, the switching unit 107 outputs the composite signal Y + C or the composite signal Y + C in accordance with the television selection signal S. FIG. Switch to output only the luminance signal (Y). In this case, the television selection signal S is a signal for selecting whether a general analog television that does not support a progressive scan output or a digital television that supports a progressive scan output.

For example, when the DVD player 100 is playing, the television (TV) 120 to which the DVD player 100 is connected is selected by the key input unit 101 as a digital television (TV) that supports progressive scan output. If so, the DVD control section 103 generates the television select signal S at a low level. In response to the low level of the television select signal S, the switching unit 107 is switched off and transmits the composite signal Y + C separated by the signal separation unit 106 to the output unit 108. . In contrast, when an analog television (TV) whose progressive scan output is not supported by the key input unit 101 is selected, the DVD controller 103 generates the television selection signal S at a high level. According to the high level television selection signal S, the switching unit 107 is switched on to output only the luminance signal from the composite signal Y + C separated by the signal separation unit 106. To pass).

Accordingly, when the DVD player 100 according to the present invention outputs a video signal in the progressive scan mode, the compressed data read from the DVD deck 102 is decoded by the decompression algorithm through the DVD decoder 104 to be DVD video. And a 2H video signal separated into an audio signal and converted into a progressive scan through the signal separation unit 106 after the horizontal frequency of the video signal is converted into 2H according to the progressive scan mode through the scan conversion unit 105. Are separated into a composite signal (Y + C) and a component signal (Y, Pb, Pr). When the television selection signal S is at the low level, the switching unit 107 determines that the television connected to the DVD player 100 is a digital television, and outputs the composite signal Y + C to the output unit 108 as it is. The output unit 108 transmits the composite signal (Y + C) to the digital television (TV) 120 through the composite connection device 110 at the same time, and the connection device 112 for the component at the other output unit 109. Transmits the component signals (Y, Pb, Pr) to the digital television (TV) 120.

If the television selection signal S is at a high level, the switching unit 107 determines that the television connected to the DVD player 100 is an analog television, and outputs only the luminance signal Y instead of the composite signal Y + C. 108). Therefore, the output unit 108 transmits the luminance signal Y to the analog television (TV) 120 through the composite connection device 110, and the component connection device 112 at the other output unit 109. The component signal (Y, Pb, Pr) is transmitted to the analog television (TV) 120 through.

Accordingly, the present invention is the switching unit 107 when the DVD player 100 is connected to an analog television (TV) 120 that does not support progressive scan and the DVD player 100 is in the progressive scan mode. The luminance signal Y is output through the composite signal output unit 108 by the driving of? Accordingly, the DVD player 100 provides the luminance signal Y together with the component signals Y, Pb, and Pr to the analog television TV in the progressive scan mode, thereby transmitting the luminance through the composite connecting device 110. The signal Y outputs a video screen image without blanketing the television screen. In this case, the television screen may display two video image screens by the component signals (Y, Pb, Pr) and two video image screens by the luminance signal (Y). Can be set.

As described above, the present invention provides a progressive scan output by providing a luminance signal through a composite connector and a component signal through a component connector according to a television selection signal when the DVD player is in a progressive scan mode. Even non-standard analog television can support video output without being blanketed.

On the other hand, the present invention is not limited to the above-described embodiment, various modifications are possible by those skilled in the art within the spirit and scope of the present invention described in the claims to be described later.

1 is a block diagram showing a video signal output device of a DVD player according to the prior art;

2 is a block diagram showing a video signal output apparatus of a DVD player according to the present invention.

<Description of the code | symbol about the principal part of drawing>-

100: DVD player 101: key input unit

102: DVD deck 103: DVD control unit

104: DVD decoder 105: composite / component signal separator

106: switching unit 107, 108: output unit

110, 112: connecting device 120: television

Claims (1)

In a DVD player, A DVD decoder that decodes compressed data read from the DVD deck to separate video and audio signals; A scan converter for converting the scanning method of the video signal of the DVD decoder according to the interlaced scan or progressive scan mode of the DVD; A signal separator for separating the composite signal and the component signal from the video signal transmitted from the scan converter; A switching unit for outputting a composite signal according to the television selection signal or for switching only the luminance signal from the composite signal; An output unit for outputting a composite signal or a luminance signal of the switching unit or a component signal of the signal separation unit; The level of the television selection signal is controlled according to whether the television connected to the DVD player is an analog television or a digital television to output a luminance signal to the composite output unit through the switching unit in the case of the analog television, and the switching unit in the case of the digital television. DVD control unit for controlling to output a composite signal to the composite output unit through Video signal output device of the DVD player comprising a.