Glossary / #
See: Line Datum.
[Top of page]
See: Frame Datum.
[Top of page]
The generic description for equipment having a data path ten Bits wide. Such a path can represent data having up to 1024 different values (four times that of an 8-bit system).
[Top of page]
In PAL/SECAM countries and Japan: Color Bars with the nomenclature 100/0/100/0.
In the US and other NTSC countries: Color Bars with the nomenclature 100/7.5/100/7.5.
[Top of page]
A digital video effect similar to a 2D Effect but with the appearance of 3-dimensions. E.g. a picture can be distorted and put on the surface of a disk to give the illusion of being put on a sphere. If the disk is rotated 90 degrees about its x-axis it will never the less be seen to be a single line, proving its 2D nature. A true 3D Effect may be rotated and viewed about any axis and still maintain an appropriate shape.
[Top of page]
Sync pulse with period of two lines, the rising edge of which marks the start of a line with positive polarity of V component in PAL chrominance signal or the start of a Dr in Dr/Db sequence in SECAM chrominance signal.
Synonyms: 7.8kHz; Dr/Db Switch, PAL Switch; PAL Switching Signal; SECAM Switch.
[Top of page]
A Sine-Squared Pulse with the half-amplitude duration equal to two-time T Unit, so the main lobe of its frequency spectrum nearly matches the bandwidth of the TV System. At the output of an ideal system the distortion of the 2T-Pulse (usually expressed in “K-Rating”) should approach zero. Relatives on this signal are the IT-pulse (double Bandwidth) and Composite Pulse etc. The purpose of the IT-pulse is to examine the effect on equipment of a signal with greater Bandwidth than that specified by the TV System. The IT pulse also helps to examine symmetry of ringing (linked with Group Delay distortion).
[Top of page]
A digital video effect where picture transformations and manipulations are not constrained within a planar surface. E.g. a picture can be distorted and put on the surface of an imaginary sphere. If this sphere is rotated 90 degrees about its x-axis, it will still appear as a sphere but with a different fragment of the input picture visible. Any desired distortion may be described by the term “3D effect” e.g., the nose of the actor can be elongated preserving its general shape.
[Top of page]
See: 4:4:4.
[Top of page]
A monochrome digital video format used only for key signal interchange in Video Mixers, Chroma-Keyers and DVEs.
[Top of page]
Interface and processing format widely used for digital video devices. Often incorrectly identified with CCIR Rec. 601 that cover the whole family of formats. Generic label widely used on any device that operates somewhere internally in 4:2:2, but may, or may not, actually have a Rec. 656 digital interface.
[Top of page]
An interface and processing format usual for video graphic workstations and digital video effects devices. It has a separate physical interface to carry the key signal with 13.5 MHz Sampling Rate (the last “4” in the format formula).
[Top of page]
An interface and processing format used by some digital video devices. It requires three physical interfaces to carry separate R, G and B digital signals.
Synonyms: 3x4 [format].
[Top of page]
A digital video format that has identical sampling rates for the luminance, color difference and key signals. A 4:4:4:4 signal, sometimes called 4x4, is usually transmitted as two separate 4:2:2 signals. These signals are generally referred to as 4:2:2 and 2:2:4. The first signal contains the wide band luminance signal and half of the wideband color difference signal. The 2:2:4 signal contains the other half of the wideband color difference signals plus the key signal.
Synonyms: 4x4 [format].
[Top of page]
Four times subcarrier Sampling Rate used in digital composite systems. Also used as a jargon term for the actual Digital Composite signals, avoiding the need to refer to D2 and D3. 4fsc is also written as 4Fsc and 4*Fsc and so on!
[Top of page]
See: 4:4:4:4
[Top of page]
See: 2H.
[Top of page]
In PAL/SECAM countries and in Japan: Color Bars with the nomenclature 75/0/75/0.
In the USA and other NTSC countries: Color Bars with the nomenclature 75/7.5/75/7.5.
[Top of page]
The generic description for equipment having a data path eight bits wide. Such a path can represent data having up to 256 different values.
[Top of page]
The wireless Ethernet family of Standards.
[Top of page]
Color Bars with the nomenclature 100/0/100/25.
[Top of page]
Ethernet at 10 gigabits per second.
