TVs with hdmi interfaces are digital TVs. HDMI is digital TV, and its full name is ground wave digital TV. If the interface between the TV and the receiver is hdmi, it is digital TV, and it is also digital TV connected by video cable and audio cable. ?

Digital TV refers to a brand-new TV system that uses or processes and modulates digital TV signals from studio to transmission and reception.

Advantages of digital TV

The image definition can be close to that of the source part of the transmitter. One of the reasons is that the signal-to-noise ratio has nothing to do with the number of continuous processing. Because the clutter is mainly superimposed on the transmission signal, and the binary digital signal is used, the influence of these clutter can be easily eliminated by shaping and the introduced error detection technology, and the noise of the analog signal will gradually accumulate during transmission.

digital signals will not produce new noise in transmission, that is, the signal-to-noise ratio can basically remain unchanged, so analog signals require signal-to-noise ratio of S/N≥4dB, while digital signals only need ≥2dB. The second reason is that the influence of nonlinear distortion in digital system can be easily eliminated, while nonlinear distortion in analog system will cause image distortion.