High-definition television broadcast

Answer 1

High-definition television broadcasting involved many aspects. In terms of technical specifications, the resolution of the high-definition television was 1920 x 1080, the field frequency was 50 frames, and it used interlaced scanning. When playing content, the response time was affected by many factors. Take the Internet TV as an example. Under the condition that the terminal can access the normal usage of the band width of not less than 100Mbit/s, the response time of the VOD program from clicking the program to playing to the first frame should be less than 2s, not more than 3.5s; the response time of the program pause/play, fast forward, fast backward and other operations should be less than 2s, not more than 3.5s; the response time of exiting the program to return to the previous page should be less than 1s. In addition to the response time, the quality of the content was also related to the resolution of the picture, color performance, sound effects, and so on. For example, some high-definition TV products had 120% quantum dot wide-area color performance, 2.1-channel Hifi three-dimensional surround sound and other functions, which helped to improve the playback experience. In addition, the broadcast program source required the support of the television system or television equipment that used digital signals in the process of processing, transmission, transmission, and reception of television signals. This was the basic requirement for digital high-definition television broadcasting.

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