KR100201310B1 - Device for the multi-screen display in laser disc player - Google Patents

Abstract

The present invention relates to a multi-screen display device of a laser disc player, in order to display a large amount of image data recorded on the laser disc in a multi-screen, each or simultaneously driven in accordance with the drive signal to read the information recorded on the laser disc A plurality of pickups, a plurality of signal processing units for signal processing the digital image data detected by the respective pickups, and digital signal signals processed by the respective signal processing units to control signals for determining a screen output state. Accordingly, one digital image data among the digital image signals input to the signal processor is output as data of a main screen having digital image data having a normal screen size, and the other digital image data is compressed to have a predetermined screen size to be sub-screened. Output as data of the compression A video signal synthesizing unit for synthesizing the two digital video data by determining the position of the digital video data of the sub-screen, and the pickup and sub-screen digital video data for reading the main video digital video data according to a control signal applied from the outside. The microcomputer outputs a driving signal by determining a pickup for reading a signal, and outputs a control signal for determining a screen output state so that a PIP screen can be output to an image signal synthesizing unit for processing image data read from the determined pickup. It was provided.

Description

Multi-Screen Display of Laser Disc Player

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen display device of a laser disc player (hereinafter referred to as LDP '), and more particularly, to signal each image data detected by each pickup using a plurality of pickups. The present invention relates to a multi-screen display device of an LDP which is processed and synthesized into a main image signal and a sub image signal.

In general, a picture in picture (PIP) system is mainly used as a multi-screen display method. The PIP inserts one or more sub-screens into a main screen in a video system in which signal processing is digitized. Displayed at the same time.

The conventional PIP function is mainly limited to displaying a TV broadcast receiving screen and a playback screen of a video tape recorder as a main screen and a sub screen, respectively. It is also possible to convert.

However, as described above, the dual screen, i.e., the LPIP function, has been used exclusively for the television broadcast receiving screen and the video tape recorder, and has not been applied to the LDP.

In addition, the conventional LDP is equipped with one pickup, and the pickup reciprocates the program area and the data area, and detects and reproduces the data of each area, thereby allowing the user to watch one relevant limit.

Therefore, the present invention is an improvement of the above-described technology of LDP, and an object of the present invention is to provide a PIP function by providing a plurality of pickups and outputting image signals detected by each pickup so as to solve the above problems. The present invention provides a multi-screen display device of an LDP.

1 is a schematic block diagram showing a multi-screen display apparatus of a laser disc player according to the present invention.

* Explanation of symbols for main parts of the drawings

1: laser disc 2,3: pickup

4, 5: demodulator 6, 7: digital signal processor

8: video signal synthesis unit 9: digital / analog converter

10: microcomputer

In order to achieve the above object, the present invention provides a plurality of pickups which are driven individually or simultaneously in accordance with a drive signal to read information recorded on a laser disc, and a plurality of signal processing digital image data detected by the respective pickups. The digital image data of the digital image signal input to the signal processing unit according to the signal processing unit and the control signal for determining the screen output state of the digital image signal processed by each signal processing unit is a digital image having a normal screen size Outputs the data of the main screen with data, and compresses another digital image data to have a predetermined screen size and outputs the data of the sub-screen, and determines the position of the digital image data of the compressed sub-screen. Video signal synthesizing unit for synthesizing video data, and A pickup that reads the digital image data for the main screen and a pickup for reading the digital image data for the sub-screen according to the control signal applied thereto, and outputs a driving signal and signals the image data read out from the determined pickup. Characterized in that it is composed of a microcomputer for outputting the control signal to determine the screen output state so that the PIP screen can be output to the signal synthesis unit.

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

1 is a schematic block diagram showing a multi-screen display apparatus of a laser disc player according to the present invention.

As shown in the drawing, the first and second drives are driven individually or simultaneously according to the drive signal input from the microcomputer 10 to read and output various information (digital video data and audio data) recorded on the laser disc 1. 2 the digital image data demodulated by the first and second demodulators 4 and 5 for demodulating the second pickup 3 and the digital image data detected by the first and second pickups 2 and 3; The first and second digital signal processing units 6 and 7 for signal processing and outputting the digital video signal, and the digital video signals signaled by the first and second digital signal processing units 6 and 7 are synthesized. A video signal synthesizing unit 8 for converting the main screen and one sub-screen, and a digital / analog converter 9 for converting the digital video signal synthesized by the video signal synthesizing unit 8 into an analog video signal and finally outputting it. And, according to the control signal applied from the outside The video signal synthesizing section 8 and a pickup for reading the digital video data for the main screen and a pickup for reading the digital video data for the sub screen are determined to output a driving signal, and the video data read out from the determined pickup is signaled. It is composed of a microcomputer 10 for outputting a control signal for determining the screen output state so that the PIP screen can be output to the video signal synthesizer to process.

The first and second digital signal processors 6 and 7 described above are digitally input to the first and second digital signal processors 6 and 7 according to a control signal for determining a screen output state of the microcomputer 10. One digital video data of the video signals is output as data of the main screen having digital video data of a normal screen size, and the other digital video data is compressed to have a predetermined screen size and output as data of a sub-screen. When the digital image data of the displayed sub screen is displayed, the position on the screen to be output is determined, and then the two digital image data are synthesized and output.

The external control signal input to the microcomputer 10 is a key signal input by the LDP user, and selects only one of the plurality of pickups to read information on the laser disk or selects a plurality of pickups. This key signal determines whether or not the PIP screen is displayed.

The operation of the multi-screen display device of the LDP according to the present invention configured as described above will be described in more detail with reference to the accompanying drawings.

Assuming that the digital image data is detected by the first pickup 2 when the PIP function is not initially selected, the microcomputer 10 receives the control signal from the outside to drive the first pickup 2. .

As the first pickup 2 is driven, the digital image data recorded on the laser disk 1 is detected by the first pickup 2.

The digital image data detected by the first pickup 2 is demodulated by the first demodulator 4. That is, the digital image data recorded on the laser disk 1 is recorded so that various data are not sequentially recorded at the time of recording, but shuffled together and their order is determined by each unique code.

In addition, an error correction code (ECC) is included to correct an error that may occur during playback. Therefore, in the demodulation process, each digital image data is sequentially arranged using a unique code and an error correction code, and demodulated into digital image data in a steady state.

The demodulated digital video data is signal-processed by the first digital signal processing section 6, converted into digital video signals, and then applied to the video signal synthesizing section 8. At this time, since the LDP does not perform the PIP function, the video signal synthesizing unit 8 receives and outputs only one digital video signal.

Therefore, the microcomputer 10 outputs a control signal to the image signal synthesizing unit 8 to perform only a pass function of simply transferring the digital image signal applied to the image signal synthesizing unit 8 to the digital / analog converter 9. To control.

The digital video signal output from the video signal synthesizing section 8 is converted into an analog video signal by the digital / analog converter 9 and finally output.

On the other hand, even when the microcomputer 10 drives only the second pickup 3 in the above-described process, the same result as described above can be obtained.

Next, assuming that the PIP function is selected, the microcomputer 10 receives a control signal from the outside and drives the first and second pickups 2 and 3 simultaneously. As the first and second pickups 2 and 3 are driven, the digital image data recorded on the laser disk 1 is detected by the first and second pickups 2 and 3, respectively.

Each of the digital image data detected by the first and second pickups 2 and 3 is demodulated by the first and second demodulators 4 and 5 as described above.

Each of the demodulated digital video data is signal-processed by the first and second digital signal processing units 6 and 7, respectively, converted to a digital video signal, and then output to the digital video signal, and then applied to the video signal synthesizing unit 8. At this time, since the LDP performs the PIP function, the image signal synthesizing unit 8 is configured to perform the PIP function. After editing one video signal into video data having the same screen size as it is output to the main screen, and editing it to be compressed to a predetermined screen size so that another digital video signal can be output to the sub screen, Output to the analog converter 9.

At this time, the compressed video signal output to the sub-screen is determined by the output position on the screen is synthesized with the video signal having a normal screen size output to the main screen and then output to the digital / analog converter (9).

On the other hand, all processing of the image signal synthesizing unit 8 is performed according to the control signal of the microcomputer 10.

The digital video signal synthesized by the video signal synthesizing section 8 is converted into an analog composite video signal by the digital / analog converter 9 and finally output. Therefore, the user can simultaneously view at least two or more image data among a large amount of image data recorded on the laser disc.

As described above, according to the present invention, according to the LDP multi-screen display apparatus according to the present invention, a plurality of pickups simultaneously detect and process video data of different tracks, and then process each video signal. By synthesizing and outputting the main screen and the sub screen, there is an effect to give the user another interest.

Claims (1)

A plurality of pickups driven respectively or simultaneously in accordance with the drive signal to read out information recorded on the laser disk; A plurality of signal processing units which signal-process the digital image data detected by each pickup; One digital image data of the digital image signal input to the signal processor according to a control signal for determining a screen output state of the digital image signal signal-processed by each signal processor has digital image data having a normal screen size. It outputs the data of the main screen, and the other digital image data is compressed to have a predetermined screen size and output as the data of the sub-screen, and the two digital image data are determined by determining the position of the digital image data of the compressed sub-screen. A video signal synthesizer for synthesizing; And a pickup for reading out the main image digital image data and a pickup for reading the sub image digital image data according to a control signal applied from the outside, outputting a driving signal, and outputting the image data read out from the determined pickup. A multi-screen display apparatus of a laser disc player having a microcomputer for outputting a control signal for determining a screen output state so that a PIP screen can be output to a video signal synthesizing unit.