Digital television

Digital television refers to the digital transmission of TV programmes. In digital transmission, conventional (analog) video and audio are converted into a binary code (0s and 1s). Unlike analog transmission, however, not every individual picture is transmitted in full, but only the part that actually changes from frame to frame. Thanks to the method of data compression (e.g. mpeg), more digital than analog programmes can be transmitted at each frequency. A digital receiver is needed to receive digital video and audio signals.