Ericsson RX8000 Mux, NIT, NMS, ODU, NTSC, NVOD, NICAM, NVRAM, MUSICAM, Network, Multicast

Annex A

Multicast	An IP mechanism that allows transmission of data to multiple
	receivers. A multicast can also have several transmit sources
	simultaneously. In video applications, multicast is typically used to
	distribute a video signal from a central source to multiple
	destinations.
MUSICAM	Masking pattern adapted Universal Sub-band Integrated Coding
	And Multiplexing: An audio bit rate reduction system relying on sub-
	band coding and psychoacoustic masking.
Mux	Multiplexer: Transmission Multiplexer: receives EMMs from the
	ACC, ECMs from the BCC, video/audio data from the encoders, and
	the SI stream from the SIC. It then multiplexes them all into a single
	DVB-compliant transport stream, and delivers the signal to the
	uplink after modulation.
	The Multiplexer also contains the cypher card, which scrambles the
	services according to the control words supplied by the BCC.
Network	In the context of broadcasting: a collection of MPEG-2 transport
	stream multiplexes transmitted on a single delivery system, for
	example, all digital channels on a specific cable system.
NICAM	Near Instantaneously Companded Audio Multiplex: Official name is
	NICAM 728. Used for digital stereo sound broadcasting in the UK
	employing compression techniques to deliver very near CD quality
	audio. 728 refers to the bit rate in kbps.
NIT	Network Information Table: Part of the service information data. The
	NIT provides information about the physical organization of each
	transport stream multiplex, and the characteristics of the network
	itself (such as the actual frequencies and modulation being used).
nm	Nanometre: a unit of length equal to one thousand millionth (10-9) of
	a metre.
NMS	Network Management System. A system used to supervise
	elements in an IP network. When a device reports an alarm, the
	alarm will be collected by the NMS and reported to the operator.
	NMS systems typically collect valuable statistics information about
	the network performance and can warn the operator early.
NTSC	National Television Systems Committee: The group, which
	developed analogue standards used in television broadcast systems
	in the United States. Also adopted in other countries (e.g. Mexico,
	Canada, Japan). This system uses 525 picture lines and a 59.97 Hz
	field frequency.
NVOD	Near Video On-Demand: Method of offering multiple showings of
	movies or events. The showings are timed to start at set intervals,
	determined by the broadcaster. Each showing of a movie or event
	can be sold to subscribers separately.
NVRAM	Non-volatile Random Access Memory: Memory devices (permitting
	random read / write access) that do not lose their information when
	power is removed. Stores the default configuration parameters set
	by the user.
ODU	Outdoor Unit

A-12 EN/LZT 790 0005 R1A