NICAM
Sign in to saveNear Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed in the early 1970s for point-to-point links within broadcasting networks. In the 1980s, broadcasters began to use NICAM compression for transmissions of stereo TV sound to the public.
Article
22 sectionsContents
- History
- Near-instantaneous companding
- Point-to-point links
- Broadcasts to the public
- Nations and regions using NICAM public broadcasts
- Implementations
- Operation
- NICAM packet transmission
- NICAM transmission problems
- NICAM carrier power
- Differing features
- Two's complement signing
- ±0 V has three binary representations
- Parity checking limited to only 6 of 10 bits
- Recording
- VCR
- DVD
- Flash memory and computer multimedia
- See also
- References
- Further reading
- External links
Near Instantaneous Companded Audio Multiplex (NICAM) is an early form of lossy compression for digital audio. It was originally developed in the early 1970s for point-to-point links within broadcasting networks. In the 1980s, broadcasters began to use NICAM compression for transmissions of stereo TV sound to the public.
== History == === Near-instantaneous companding === The idea was first described in 1964. In this, the 'ranging' was to be applied to the analogue signal before the analogue-to-digital converter (ADC) and after the digital-to-analogue converter (DAC). The application of this to broadcasting, in which the companding was to be done entirely digitally after the ADC and before the DAC, was described in a 1972 BBC Research Report.