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HD9084 HDTV Caption Encoder Manual
GLOSSARY Page 7-3
BYTE: A complete set of quantized levels containing all the bits. Bytes consisting of 8 to 10
bits per sample are typical in digital video systems.
CABLE EQUALIZATION: The process of altering the frequency response of a video amplifier to
compensate for high frequency losses in coaxial cable.
CDP: Caption Distribution Packet, was defined in SMPTE-334M-2006 (and formerly in CEA-
708-B). CDPs may contain CEA-708 and/or CEA-608 caption data.
CCIR (International Radio Consultative Committee): An international standards committee. (This
organization is now known as ITU.)
CCIR-601: See ITU-R601
CCIR-656: See ITU-R656
CLIFF EFFECT: (also referred to as the ‘digital cliff’) This is a phenomenon found in digital video
systems that describes the sudden deterioration of picture quality when due to
excessive bit errors, often caused by excessive cable lengths. The digital signal will
be perfect even though one of its signal parameters is approaching or passing the
specified limits. At a given moment however, the parameter will reach a point where
the data can no longer be interpreted correctly, and the picture will be totally
unrecognizable.
COMPONENT ANALOG: The non-encoded output of a camera, video tape recorder, etc.,
consisting of the three primary colour signals: red, green, and blue (RGB) that together
convey all necessary picture information. In some component video formats these
three components have been translated into a luminance signal and two colour
difference signals, for example Y, B-Y, R-Y.
COMPONENT DIGITAL: A digital representation of a component analog signal set, most often Y,
B-Y, R-Y. The encoding parameters are specified by ITU-R601. ITU-R656 and
SMPTE 125M specify the parallel interface.
COMPOSITE ANALOG: An encoded video signal such as NTSC or PAL video that includes
horizontal and vertical synchronizing information.
COMPOSITE DIGITAL: A digitally encoded video signal, such as NTSC or PAL video that
includes horizontal and vertical synchronizing information.
D1: A component digital video recording format that uses data conforming to the ITU-R601
standard. Records on 19 mm magnetic tape. (Often used incorrectly to refer to
component digital video.)
D2: A composite digital video recording format that uses data conforming to SMPTE 244M.
Records on 19 mm magnetic tape. (Often used incorrectly to refer to composite digital
video.)
D3: A composite digital video recording format that uses data conforming to SMPTE 244M.
Records on 1/2" magnetic tape.
DSO: (Daylight Saving time Observed)
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