Nicam Digital Stereo

NICAM is the digital stereo sound system used in the United Kingdom for normal terrestrial analogue broadcasts developed by the BBC.
NICAM is a data compression system for encoding and decoding sound at speed (So as to avoid lip-sync)
It works at a 32kHz Sampling frequency and so has a reduced audible frequency range (15Khz) compared to other digital formats such as CD or MPEG audio although it is less compressed at it is transmitted at a bitrate of 704Kbps