Thompson ViBE EM4000, User Manual

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Glossary
ViBE EM4000 — Release 1.10 235
User Manual — 46073586AB02
CAT Conditional Access Table
CAT table is used for conditional access to the streams. It provides
association with the EMM stream.
CAVLC Context Adaptive Variable Length Coding.
CAVLC is a form of entropy coding used in H.264 video encoding. CAVLC
has lower coding efficiency than CABAC but is less computationally
expensive.
CBR Constant Bit-rate.
The bit-rate of the bit-stream is constant. (see VBR)
CC Close Caption.
Chrominance Chrominance (chroma or C for short) is the signal used in video systems
to convey the color information of the picture, separately from the
accompanying luma signal (or Y for short).
CIF Common Intermediate Format.
A format used to standardize the horizontal and vertical resolutions in
pixels of YCbCr sequences in video signals, commonly used in video
teleconferencing systems (video size: 352p x 288p).
Closed Caption A TV picture subtitling system used with 525-line analog transmissions.
Composite Video A baseband representation of a video signal containing luminance and
chrominance information.
Compression The process of removing redundant data from audio or video streams to
reduce the amount of data transferred or stored.
CPU Central Processing Unit.
CrCb Digital Color difference signals. These signals, in combination with the
luminance signal (Y), define the color and brightness of each picture
element (pixel) on a TV line.
See: Chrominance.
CRC Cyclic Redundancy Check.
A cyclic redundancy check (CRC) is an error-detecting code designed to
detect accidental changes to raw computer data, and is commonly used in
digital networks and storage devices such as hard disk drives.
CVBS Composite Video, Blanking, and Sync.
CVCT Cable Virtual Channel Table (ATSC).
CW Control Word.
CWG Control Word Generator.
dB Decibel
The decibel is a logarithmic unit that indicates the ratio of a physical
quantity (usually power or intensity) relative to a specified or implied
reference level. A ratio in decibels is ten times the logarithm to base 10 of
the ratio of two power quantities. A decibel is one tenth of a bel, a
seldom-used unit.
dBFS Decibel Full Scale