Component video

Introduction

Component Video S-Video (SUPER-VIDEO, Sometimes Writing Y / C Video, or Component Video Component Video) is a video signal transmission mode in which transmission In the mode, the luminance signal and the chroma signal are separated from the transmission, thereby generating a sharper screen. The brightness signal (Y) carrying brightness information, which defines the proportion of black and white, while the color signal (C) carrier color information, which defines tones and saturation. In traditional or combined video (Composite Video), traditional video signal transmission is to transmit both as a signal (and synchronization data). The TV is actually displaying brightness and chrominance signals, respectively. The composite signal must be separated before being displayed. Two signals present a frequency range greater than 2.1 megahertz (MHz) when transmitted in a compound manner. The overlap area is difficult to be completely separated, and another signal in some signal will generate a video error. The chroma data remaining in the brightness data will generate a grip effect, which generates a point structure pattern (sometimes referred to as "creep"), and the luminance data remaining in color data will be Some detail images produce a rainbow effect, this phenomenon called "strooker". Separating the signal in S-VIDEO is cleverly avoiding this possible process.

Composition Structure

In YUV, "Y" represents brightness brightness (LUMINANCE or LUMA), that is, gray scale; and "u" and "v" are indicated by Chrominance or Chroma, the role is to describe image color and saturation for specifying the color of the pixel.

"Brightness" is created by the RGB input signal, and the method is to combat the specific part of the RGB signal. Chromaticity defines two aspects of colors - hue and saturation, which are represented by Cr and CB, respectively. Among them, Cr reflects the difference between the red portion of the RGB input signal and the luminance value of the RGB signal, and the CB reflects the difference between the blue portion of the RGB input signal and the luminance value of the RGB signal, which is the so-called color difference signal, that is We often say the component signal (Y, RY, by).

The color difference is divided into progressive and interlaced, which generally says that there are several letters above the component interface to represent progressive and interlaced. The use of Y / CB / CR is interlaced, and the Y / PB / PR is represented by line. If the TV is only the Y / CB / Cr component terminal, the television cannot support the progressive component, and Y / PB / In the case of the PR component terminal, it will illustrate the 2 components that support progressive and interlaced.

Transfer method

The video transmitted by component color difference has a variety of ways, such as the RGB mode directly transmitted directly, and all colors are harmed, with the highest quality, in Professional color monitors and computer displays are in this way. However, since the RGB mode is too large to the transport bandwidth and storage space, it is used to save the transmission bandwidth, and the component color difference is used, and the conversion from RGB is converted to brightness (Y) and color difference (CB / CR or PB / PR, representing an interlaced scan, respectively. Row scanning). The component / color difference terminal uses three coaxial terminals, and the corresponding terminals are labeled as green (brightness), red (tones), and blue (saturation), which also becomes the mainstream mode of the current consumer video equipment.

three-color difference Split video distributor supports RGB, YUV, YPRPB, YCRCB, RSGB, RGSB, RGBS signals. Video matching devices such as entertainment, teach, monitoring, etc., can accurately reproduce HDTV, DVD-VIDEO full color, strong light dark level and fiber must now high-definition picture quality, image after the product is distributed The effect is excellent, no ghosting, no trailing.

HD color difference dispenser can input the input Y PB / CB PR / CR signal, drive the circuit through the imported chip, and then assign multiple signals to implement a plurality of display devices clear allocation effects.

Application Products

The above technology application products: 3-RCA interface video matrix switch, YUV component video signal switch, VIDEO composite video conversion component video cable and other interface products

Computer analog component video (RGBHV signal)

RGBHV signal interface is a method that encodes a color is called "color space" or "color gamut". In the easiest way, "color space" in any color in the world can be defined as a fixed number or variable. RGB (red, green, blue) is just a kind of color space. With this coding method, each color can be represented by three variables - red, green, and blue strength. RGB is the most common solution when recording and displaying a color image. However, it lacks good compatibility with early black and white display systems. Therefore, the practice of a multi-electronic electrical manufacturer is generally used to convert RGB into YUV color empty, in maintenance compatibility, and then replace the RGB format as needed to display color graphics on the computer display.

Computer analog signals are divided into five: where RGBHV is, which is red and green blue three original colors and row. Since the VGA transmission distance is very short, in order to transmit a farther distance, the VGA line is removed by separating RGBHV (ie: red, green, blue, blue, line, field), separately with five coaxial Cable transmission (usually used in five-core coaxial cable), this transmission mode is RGB transmission, and this signal is also called RGB signals, in fact, RGB and computer simulation VGA signals are not different.

Matrix switch , implement multiple signal input, multi-channel signal output, can switch any output port signal switch to output any of the input signals.