Pulse-code modulation for broadcast signal distribution

The reduction in cost and increase in range of digital circuits has meant that, for broadcast signals, as with other aspects of communication engineering, digital processing is an attractive alternative to analogue methods, Sound and vision signals are unlikely to be broadcast in digital form in the near future because, if for no other reason, of the extensive ownership of receivers of analogue signals. However, pulse-code modulation of sound signals for distribution between broadcast centres has been used in different ways for several years. For video signals, development work carried out by broadcasting organisations has yielded promising results