What are the transmission modes of digital TV?

Transmission mode of digital TV: \x0d\ terrestrial wireless transmission digital TV (terrestrial digital TV) \x0d\ satellite transmission digital TV (satellite digital TV) \x0d\ wired transmission digital TV (cable digital TV) \x0d\ signal transmission \ x0d \ According to the signal transmission mode of digital TV, it can be divided into terrestrial wireless transmission, satellite transmission and wired transmission. \x0d\\x0d\ Product type \x0d\ According to the product type of digital TV, it can be divided into digital TV monitors, digital TV set-top boxes and integrated digital TV receivers. \x0d\x0d\ screen format \ x0d \ According to the display screen format of digital TV, there are two formats: 4: 3 format ratio and 16: 9 format ratio. \x0d\\x0d\ Number of scanning lines \x0d\ According to the number of scanning lines, digital TV can be divided into HDTV scanning lines and SDTV scanning lines. \x0d\ x0d \ definition \ x0d \ can be divided into low-definition digital TV, standard-definition digital TV and high-definition digital TV. The image format of VCD belongs to the level of low definition digital TV, and the image format of DVD belongs to the level of standard definition digital TV. \x0d\ Radio and television are gradually developing towards high definition, and more high-definition program formats such as 4k have appeared.