Reference: https://www. Eepw. Com. Cn/article/283318. Htm1. The workings of television -- a brief description
Television/video: the abbreviations of colour televisions are used to transmit live visual images by electronic means. Similar to the film, television uses the visual residual effects of human eyes to show a gradual static image to create visual activity images. The transmission end of the television system transfers the fine parts of the landscape in sequence after the light and colour have been converted to telecommunications. Recreates the original image at the receiving end by showing the brightness and colour of the fine parts at the respective geometry。
2. The working principles of television -- signal processing
The sequenced sampling, transmission and reproduction of television signals from point to face is done by scanning. The chinese television scanning formula is 25 frames per second, 625 lines per frame, each line from left to right, and each frame is completed in two separate lines, from top to bottom, in odd and even lines, to reduce scintillation. Sends image information during scanning. When the scanning of electronic beams returns from the end of the normal course of the previous line to the reverse sweep line before the beginning of the next line, and when each sweep is completed from top to bottom, the reverse sweep line returning to the top shall be removed. (b) transmit the walk-in synchronous signal during the walk-in and synchronize the receiving and sending scans to accurately reproduce the original image。
3. The working principles of television -- the camera principles
Television camera looks like the light of the scene is focused on the light-sensitive (or light-guided) target surface of the cavity of the camera, and the light-electronic stimulation or photo-guided variation of the point of the target varies according to the brightness of the light. When scanned to the target surface with an electronic beam, a telecommunications signal is produced that is equal to the brightness of the view. Transmitting to a television receiver changes the scanning electronic beam on the cathode screen to the strength of the input signal. The original images sent are visible on the screen of the cathode when they are scanned in sync with the sending end。
