162 Glossary
CP560 DVB-T2 Gateway User’s Manual Rev. 2.2 (3686) ID: um_t2gateway
information. Increasing the amount of redundant data will enable the receiver to correct
more errors (i.e. regenerate lost packets) in case of network data loss.
HD-SDI
High Definition - Serial Digital Interface. Also known as ANSI/SMPTE SMPTE 292M-1998.
A specification describing how to digitize and transmit uncompressed high definition video
signals. The typical bit rate of an HD-SDI signal is 1485 Mbit/s.
HDTV
High Definition Television. Television standard(s) that provide(s) improved picture reso-
lution, horisontally and vertically, giving clearer and more detailed TV pictures.
HTTP
HyperText Transfer Protocol. The fundamental protocol used on the Internet for transmis-
sion of WEB pages and other data between servers and PCs.
ICMP
Internet Control Message Protocol. ICMP messages, delivered in IP packets, are used for
out-of-band messages related to network operation.
IGMP
Internet Group Management Protocol. IGMP is a protocol used to manage multicast on the
Internet. For a host (receiver unit) to receive a multicast, it needs to transmit IGMP “join”
messages in the right format. Three versions exist. IGMPv2 is commonly used today, but
IGMPv3 is the next step.
JPEG2000
A wavelet-based image compression standard. It was created by the Joint Photographic
Experts Group committee with the intention to supersede their original discrete cosine
transform-based JPEG standard. JPEG2000 can operate at higher compression ratios with-
out generating the characteristic ’blocky and blurry’ artifacts of the original DCT-based
JPEG standard.
Meta-data
Meta-data is descriptive data that is “tagged” to a movie or audio clip. Meta-data is
essential for the broadcaster.
MPEG-2
Moving Picture Experts Group 2. The compression standard used today on most satellite
and cable TV digital broadcasts. MPEG-2 also includes standardisation of data transport
of video using other compression techniques, and other types of information.
MPLS
Multi-protocol Label Switching. A Quality of Service mechanism for IP networks that
allows IP packets to flow along a predefined path in a network, improving the reliability
and robustness of the transmission.
MPTS
Multi Program Transport Stream. MPEG2 transport stream that carry multiple TV/Radio
services.
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