CVBS, YUV, VGA

RGB (red green blue): Red, green, and blue
CMYK (cyan-magenta-Yellow-black ink): cyan-magenta-Yellow-black
HSI (hue-saturation-intensity): Tone-saturation-intensity
DDB (device-Dependent Bitmap): Device-related bitmap
Dib (device-independent Bitmap): device-independent bitmap
CVBS (composite video broadcast signal): Composite television broadcasting Signal

 

CVBS

It is a combination of video signals or compound video hiding and synchronization.

Full name: composite video broadcast signal or composite video Blanking and sync

It has only one signal line, but contains the brightness and color signals, as well as row synchronization and field synchronization. You can directly access the ADC, but usually y/C separation and synchronous extraction are required for applications, and then the Y/C signal is sent to different ADC, respectively, digital outputs are also often encoded into standard "Compound Digital Signals" such as itur656 and 610 ".

 

The monitor receives the CVBS for color decoding, and receives the RGB signal. Only one synchronization is required to be sent to the scanning system;

CVBS can be transmitted using two lines. RGB transmission requires at least four lines.

It is a format before analog TV Program (picture) signals are combined with sound signals and modulated to RF carrier.
CVBS is short for "color, video, blank and sync", "composite video baseband signal", "composite video burst signal", or "composite video with burst and sync ".

VGA is a monitor display method. The most popular is a computer monitor. VGA is a general term. The real VGA can only reach 720x576, while the current computer display resolution is 1024x768, is svga mode.

CVBS is a relatively old display mode, more accurately said that the first generation of Video Display output mode (the second generation is the S-VIDEO, the third generation is VGA, the fourth generation is DVI, the fifth generation is HDMI ), currently, the display devices, such as televisions and computer monitors, have CVBS interfaces. Therefore, CVBS has become a mainstream interface. With the increasing resolution of display devices, especially large screen LCD TVs, more and more devices provide VGA and HDMI interfaces.

The ypbpr interface is the most standard high-definition digital video interface in the industry. The simulated y, Pb, and PR signals can be separated and transmitted independently using three cables;

 

YUV (also known as ycrcb) is a color encoding method used by European television systems (PAL ). YUV is mainly used to optimize the transmission of color video signals, so that it is backward compatible with vintage black and white TVs. Compared with RGB video signal transmission, RGB requires three independent video signals to be transmitted at the same time ).

"Y" indicates the brightness (Lumina nce or Luma), that is, the gray scale value;

The "brightness" is created by an RGB input signal by overlapping specific parts of the RGB signal.

"U" and "V" represent chrominance or chroma, which describes the image color and saturation and is used to specify the pixel color.

"Color" defines two aspects of color-tone and saturation, expressed by Cr and CB respectively.

Cr reflects the difference between the red part of the RGB input signal and the brightness value of the RGB signal.

CB reflects the differences between the blue part of the RGB input signal and the brightness value of the RGB signal.