KR940003384A - Output Circuit and Method of Color Video Signal in Integrated Information Network - Google Patents

Abstract

A decoder is provided to restore and decode the compressed coded video data received through the transmission channel of the integrated information communication network to reproduce the color video signal as a video screen. To this end, the controller controls the interfacing operation with the decoder and receives the multiplexed image data, and the video controller stores the image data received by the controller in the luminance region and the chrominance region of the video memory. The luminance and chrominance data output from the video memory are demultiplexed by the data latch unit, and the data are converted into analog luminance and chrominance signals by the D / A converter. Then, the Y / C synthesis unit remetrically converts the luminance and color difference signals into color component signals, and the display unit receives them and reproduces them on the video screen.

Description

Output Circuit and Method of Color Video Signal in Integrated Information Network

Since this is an open matter, no full text was included.

1 is a circuit for receiving a still image signal of a public switched line network.

2 is a block diagram of a receiving unit of a color video signal in a comprehensive information communication network.

3 is a configuration diagram of an output unit of a color video signal in FIG. 2.

4 is a concrete circuit diagram of the Y / C synthesis portion in FIG.

Claims (4)

A color video signal processing circuit of a general information communication network having a decoder for restoring and decoding compressed coded video data received through a 2B + D channel, comprising: receiving multiplexed color video data received from the decoder; And a video memory sequentially storing the color video data received according to multiplexing in a luminance data area and a chrominance data area, and controlling an interfacing operation between the video memory and a decoder, and sequentially storing the video data in the video memory. And a control unit for controlling to output the same, and outputting the video memory, and means for demultiplexing and outputting the multiplexed received luminance data, the first color difference data and the second color difference data, and the demultiplexed received luminance. Data, first color difference data and first Means for converting and outputting two color difference data into an analog luminance signal, a first color difference signal, and a second color difference signal, and receiving the luminance signal, the first color difference signal, and the second color difference signal, and dematrixing the received signals. And a means for converting and outputting to color components and display means for receiving and reproducing the color component signals to a video screen. 2. The apparatus of claim 1, wherein the demultiplexing means divides the pixel clock into predetermined portions to generate a sampling clock and a second sampling clock having a period twice the sampling clock, and receives luminance data from the video memory. Means for delaying one sampling period by a clock and latching the luminance data every sampling period, receiving first color difference data from the video memory, delaying two sampling periods by the second sampling clock, and performing a second sampling period. The luminance multiplexed by means for latching one chrominance data and means for receiving second chrominance data from the video memory and latching the first chrominance data at two sampling periods at a corresponding point in time by the second sampling clock. And to demultiplex the data, the first color difference data and the second color difference data. The Integrated Services Digital Network color video signal output circuit. 3. The apparatus according to claim 1 or 2, wherein the dematrix means receives the luminance signal Y and the first color difference signal RY, adds the luminance signal Y and the first color difference signal RY, and generates an R signal; Means for receiving the luminance signal Y, the first color difference signal RY, and the second color difference signal BY, and adding the luminance signal Y, the first color difference signal RY, and the second color difference signal BY to generate a G signal; And a means for receiving a signal Y and the second color difference signal BY, and adding the luminance signal Y and the second color difference signal BY to generate a B signal. A color video signal output method of a general information communication network having a decoder for recovering and decoding compressed coded video data received through a transmission channel, wherein the multiplexing luminance data received from the decoder and the first and second color difference data are stored in a video memory. Sequentially storing the first and second regions of the video memory; reading and demultiplexing luminance data and first and second color difference data stored in the first and second regions of the video memory; Converting the multiplexed data into an analog signal to generate a luminance signal and first and second color difference signals, dematrixing the luminance signal and the first and second color difference signals, and converting and outputting the color component signal; Color video signal output of a comprehensive information communication network, characterized in that the process of playing the color component signal to the video screen Method. ※ Note: The disclosure is based on the initial application.