KR960039953A - Dual Screen Generator of Wide Television - Google Patents

Abstract

The present invention uses a plurality of field memories to adjust and output the data amounts of the main and sub picture signals stored and outputted in the field memories, so that the operation of implementing the dual screens displayed up and down can be easily performed. It is to provide a dual screen generator of a television.

To this end, in the present invention, in a wide television capable of displaying the main screen and the sub-screen having the same aspect ratio, the main screen composite digitally converted by the analog / digital conversion unit 2 via the AV signal switching unit 1 is used. The video signal is stored in a unit of data and stored / output, and at the time of output, the first field memory 10 is compressed and outputted at a predetermined ratio, and the AV signal switching unit 1 is used as an analog. The second field memory 12, which digitally converts the sub-picture composite video signal digitally converted by the digital conversion unit 3 into a field unit and stores and outputs the data, wherein the stored input data is compressed and output at a predetermined ratio. Are connected to the first and second field memories 10 and 12, respectively, to store / output data from the first and second field memories 10 and 12, and at the time of outputting the stored input data. The first and second buffers 14 and 16 and the data from the first and second buffers 14 and 16 are selectively switched to output to the digital / analog converter 7 by a predetermined value. A data switching section 18 to be applied and an operation timing pulse of the first and second field memories 10; 12, and the first and second field memories 10; 12 and the first and second fields. A timing pulse generator 20 that generates a predetermined timing pulse necessary for the storage / output operation of the second buffers 14 and 16 and generates a buffer selection select signal required for the switching operation of the data switching unit 18. ).

Description

Dual Screen Generator of Wide Television

As this is a public information case, the full text was not included.

FIG. 2 is a block diagram of a dual-screen generator of a wide television according to the present invention, and FIGS. 3A to 3G are output signal waveform diagrams of respective parts of the dual-screen generator shown in FIG.

Claims (4)

In a wide television capable of displaying a main screen and a sub-screen having the same aspect ratio, the composite video signal for main screen digitally converted by the analog / digital conversion unit 2 via the AV signal switching unit 1 is field-based. Data is stored / outputted, and at the time of outputting, the first field memory 10 in which the stored input data is compressed and output at a predetermined ratio, and the analog / digital conversion unit 3 through the AV signal switching unit 1 as a medium. The second field memory 12, the first and the first, wherein the composite video signal digitally converted in sub-field is stored and outputted in field units, and the stored input data is compressed and output at a predetermined ratio. Respectively connected to the two field memories 10; 12 to store / output data from the first and second field memories 10; 12, and at the time of outputting, the amount of stored input data is pressed for a predetermined value. And a data switching unit for selectively switching the data from the first and second buffers 14 and 16 and the first and second buffers 14 and 16 to the digital / analog converter 7. 18) and an operation timing pulse of the first and second field memories 10; 12 while generating the first and second field memories 10; 12 and the first and second buffers 14; And a timing pulse generator 20 for generating a predetermined timing pulse necessary for the storage / output operation of 16) and generating a buffer selection select signal for the switching operation of the data switching unit 18. Dual screen generator of wide TV to say. An inverter IV is provided between the first field memory 10 and the second field memory 12 so as to alternate with each other by a predetermined timing pulse from the timing pulse generator 20. A dual-screen generator of a wide television, characterized in that to operate as a target. The frequency of the output timing pulses provided from the timing pulse generator 20 to the first and second field memories 10 and 12 is set to be higher than a frequency of the storage timing pulses. A dual screen generator for a wide television. The frequency of the storage timing pulses provided from the timing pulse generator 20 to the first and second buffers 14 and 16 is the first and second field memories 10. 12 is equal to the frequency of the output timing pulse, and the frequency of the output timing pulse provided from the timing pulse generator 20 to the first and second buffers 14 and 16 is equal to the first and second fields. A dual-screen generator for a wide television, characterized in that it is equal to the frequency of the storage timing pulse of the memory (10; 12). ※ Note: The disclosure is based on the initial application.