KR930015890A - Input Circuit and Method of Color Video Signal in Integrated Information Network - Google Patents

Abstract

A codec unit for compressing and encoding preprocessed image data is provided to obtain high quality image data by preprocessing the color video signal in a comprehensive information communication network transmitting color video signals over a channel. To this end, a color component signal of a video signal generated from a camera is received and separated into a luminance signal and a first and second color difference signals, and the luminance signal and the first and second color difference signals are respectively divided into luminance data and first and second colors. Digital conversion to two-color difference data. Thereafter, digital conversion of the luminance data and the first and second color difference data is performed. Are stored respectively in the area of the video memory and the color difference area. Then, the controller controls the access operation of the video memory and interfaces the image data between the video memory and the condenser.

Description

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

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

1 is a configuration diagram of a transmission circuit for a still image signal of a public line switching network, FIG. 2 is a configuration diagram of a transmission unit of a color video signal in a general information communication network, FIG. 3 is a configuration diagram of an input circuit of a color video signal, and FIG. Fig. 5 is a concrete circuit diagram of the Y / C separator, and Fig. 5 is a concrete circuit diagram of the clock generator during the fifth step.

Claims (8)

A color video signal preprocessing circuit having a codec unit for compressing and encoding preprocessed video data to transmit a color video signal on a channel, wherein the color component signal of the video signal is received to receive the luminance signal and the first and second signals. Means for separating into two color difference signals, means for receiving the luminance signal and the first and second color difference signals and digitally converting the luminance data and the first and second color difference data, respectively, and the luminance data and the first and second colors. Means for receiving and multiplexing color difference data, a video memory for receiving the multiplexed image data and storing the multiplexed image data in a luminance memory area and a chrominance memory area, and controlling an access operation of the video memory. And a control unit for interfacing the image data between the codec units. An input circuit of a color video signal. 2. The apparatus according to claim 1, wherein the separating means receives the R, G, and B signals which are the color component signals, and means for separating the luminance signal Y by non-inverting the R, G, and B signals, and the color component signal. Means for receiving an R, G, and B signal, and inversely adding the R signal to the luminance signal Y to separate the first color difference signal RY; and receiving the R, G, and B signals, which are the color component signals, and receiving the B signal. Means for separating the second color difference signal BY by inverting the luminance signal Y with the luminance signal Y. 3. The digital signal generating apparatus according to claim 2, wherein the digital converting means divides the pixel clock by a predetermined amount to generate a sampling clock, the luminance signal Y, and digitally converts the luminance signal received by the sampling clock to generate the luminance data DY. Means for receiving the first color difference signal RY, digitally converting the first color difference signal RY received by the sampling clock to generate a first color difference data DRY, and receiving the second color difference signal BY And means for digitally converting the second color difference signal BY received by the sampling clock to generate second color difference data DBY. 4. The apparatus according to claim 3, wherein the multiplexing means receives the sampling clock to generate a second selection signal in the first half in two sampling periods and at the same time generates a third selection signal in the second half, and receives the luminance data DY, each sampling. Means for outputting luminance data received in a period, means for receiving the first color difference data DRY, and selectively outputting the first color difference data DRY at every half of every two sampling periods by the second selection signal; And means for receiving a second color difference data DBY and selectively outputting the second color difference data DBY at the second half of every two sampling periods by the third selection signal. A preprocessing circuit for a color video signal of a comprehensive information communication network that includes a codec unit for compressing and encoding preprocessed video data to transmit a color video signal on a channel, wherein a color component signal is generated by acquiring an image with a subject and generating a pixel component signal. Means for generating a synchronization signal, means for receiving the synchronization signal and the pixel clock, dividing the pixel clock by a predetermined amount to generate a sampling clock, receiving the sampling clock and the blank signal, and the blank signal being in an inactive state. Means for generating a first to third selection signal by logically combining the sampling clocks, receiving the color component signals, and performing matrix processing to separate the color component signals into luminance signals and first and second color difference signals. Means for receiving the luminance signal and the first and second color difference signals, Means for digitally converting the received signals to generate luminance data and first and second color difference data, and receiving the luminance data and first and second color difference data, and receiving by the first to third selection signals. Means for multiplexing and outputting data, and receiving the multiplexed and received data through a first port, storing luminance data in a first memory area, storing first and second color difference data in a second memory area, and storing data A video memory outputting a second port to a second port, a video controller controlling an access operation of the video memory, a controller controlling an operation of the video controller, and interfacing the video codec with image data. Input circuit for color video signal. 6. The apparatus of claim 5, wherein the means for generating a first-third selection signal receives the blank signal and a sampling clock, and synchronizes the sampling clock with the blank signal to cause the blank signal to be inactive in the sampling clock. Means for generating a first selection signal, two means for dividing the first selection signal to generate a second selection signal that is active in the first half of a two sampling period, and two sampling for inverting the second selection signal. And a means for generating a third selection signal that is activated at the second half of the cycle. 7. The apparatus of claim 6, wherein the multiplexing means receives the luminance data, latches the luminance data received by the first selection signal at every sampling time point, and receives the first color difference data. Means for latching and storing the first color and data received by the selection signal, latching and storing the first color difference data in the first half period during which the second selection signal is activated, and receiving the second color difference data, And means for latching and storing second color difference data received by a second selection signal and outputting the second color difference data being latched in the second half period in which the third selection signal is activated. Circuit. A preprocessing method of a color video signal of a comprehensive information communication network, comprising a codec unit for compressing and encoding preprocessed video data, to transmit a color video signal on a channel, wherein the color component signal of the color video signal is received to receive a luminance signal and a first signal. And dividing the luminance signal into a second color difference signal, digitally converting the luminance signal and the first and second color difference signals into luminance data and first and second color difference data, and outputting the luminance data every sample period. And a multiplexing process of selectively outputting the first color difference data to a previous sample period every two times the sampling period, and selectively outputting the second color difference data to a subsequent sample period. First and second color difference data stored in one video memory and simultaneously outputting the multiplexed output to a second video memory Process and an input method of a color video signal, characterized by access to the first storage and the image data of the second video memory constituted by any process for output to the video codec to be saved. ※ Note: The disclosure is based on the initial application.