TANDBERG TT1260 Reference Manual page 104

Glossary
LVDS
Macroblock
Mbit/s
MCC
MCPC
MEM
MMDS
Motion Compensation
Motion Estimation
Motion Vector
MP@ML
MP@HL
MPEG
MPEG-2
msb
Msymbol/s
Multiplex
MUSICAM
Mux
Page A-8
Low Voltage Differential Signal: LVDS is a generic multi-purpose Interface standard for high
speed / low power data transmission. It was standardised in ANSI/TIA/EIA-644-1995
Standard (aka RS-644).
A 16x16-pixel area of the TV picture. Most processing within the MPEG domain takes place
with macro blocks. These are converted to four 8x8 blocks using either frame DCT or field
DCT. Four 8 x 8 blocks of luminance data and two (4:2:0 chrominance format), four (4:2:2) or
eight (4:4:4) corresponding 8 x 8 blocks of chrominance data coming from a 16 x 16 section of
the luminance component of the picture. Macroblock can be used to refer to the sample data
and to the coded representation of the sample values and other data elements.
Million bits per second.
Multiplex Control Computer: A component of a System 3000 compression system. The
MCC sets up the configuration for the System 3000 Multiplexers under its control. The MCC
controls both the main and backup Multiplexer for each transport stream.
Multiple Channels Per Carrier.
Multiplex Element Manager: A GUI based control system, part of the range of TANDBERG
Television compression system control element products. The evolution 5000 MEM holds a
model of the system hardware. Using this model, it controls the individual system elements to
configure the output multiplexes from the incoming elementary streams. The MEM monitors
the equipment status and controls any redundancy switching.
Multichannel Microwave Distribution System: A terrestrial microwave direct-to-home
broadcast transmission system.
The use of motion vectors to improve the efficiency of the prediction of sample values. The
prediction uses motion vectors to provide offsets into the past and/or future reference frames
or fields containing previously decoded sample values that are used to form the prediction
error signal.
The process of estimating motion vectors in the encoding process.
A two-dimensional vector used for motion compensation that provides an offset from the co-
ordinate position in the current picture or field to the co-ordinates in a reference frame or field.
Main Profile at Main Level: A subset of the MPEG-2 standard, which supports digital video
storage (DVD etc.) and transmissions up to 15 Mbit/s over various mediums.
Main Profile at High Level: A subset of the MPEG-2 standard, which supports digital video
storage (DVD etc.) and transmissions up to 80 Mbit/s over various mediums.
Moving Pictures Experts Group: The name of the ISO/IEC working group which sets up the
international standards for digital television source coding.
Industry standard for video and audio source coding using compression and multiplexing
techniques to minimise video signal bitrate in preparation for broadcasting. Specified in
ISO/IEC 13818. The standard is split into layers and profiles defining bitrates and picture
resolutions.
Most significant bit.
(Msym/s) Mega (million) Symbols per second (10
A number of discrete data streams (typically 8 to 12), from encoders, that are compressed
together in a single DVB compliant transport stream for delivery to a Modulator.
Masking pattern adapted Universal Sub-band Integrated Coding And Multiplexing: An
audio bitrate reduction system relying on sub-band coding and psychoacoustic masking.
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.
6
Symbols per second).
Reference Guide: TT1260 Contribution Receiver
ST.RE.E10100.3