T
Tera. An SI prefix for denominations of one trillion (1012).

telecine artist
The operator of a telecine machine. Also called a colorist.

telecine
The process (and the equipment) used to transfer film to video. The telecine machine performs 3:2 pulldown by projecting film frames in the proper sequence to be captured by a video camera.

temporal resolution
The clarity of a moving image or moving object, or the measurement of the rate of information change in motion video. See resolution.

temporal
Relating to time. The temporal component of motion video is broken into individual still pictures. Because motion video can contain images (such as backgrounds) that do not change much over time, typical video has large amounts of temporal redundancy.

TIF or TIFF
Tag Image File Format. A common graphic file format supported by most DVD-Video authoring tools for the importation of still images, menu backgrounds and highlight overlay images.

tilt
A mechanical measurement of the warp of a disc. Usually expressed in radial and tangential components: radial indicating dishing and tangential indicating ripples in the perpendicular direction.

time code
Information recorded with audio or video to indicate a position in time. Usually consists of values for hours, minutes, seconds, and frames. Also called SMPTE time code. Some DVD-Video material includes information to allow the player to search to a specific time code position.

title key
A value used to encrypt and decrypt (scramble) user data on DVD-Video discs.

title
The largest unit of a DVD-Video disc (other than the entire volume or side). Usually a movie, TV program, music album, or so on. A disc can hold up to 99 titles, which can be selected from the disc menu. Entire DVD volumes are also commonly called titles.

track buffer
Circuitry (including memory) in a DVD player that provides a variable stream of data (up to 10.08 Mbps) to the system decoders of data coming from the disc at a constant rate of 11.08 Mbps (except for breaks when a different part of the disc is accessed).

track pitch
The distance (in the radial direction) between the centers of two adjacent tracks on a disc. DVD-ROM standard track pitch is 0.74 mm.

track
1) A distinct element of audiovisual information, such as the picture, a sound track for a specific language, or the like. DVD-Video allows one track of video (with multiple angles), up to 8 tracks of audio, and up to 32 tracks of subpicture; 2) one revolution of the continuous spiral channel of information recorded on a disc.

transfer rate
The speed at which a certain volume of data is transferred from a device such as a DVD-ROM drive to a host such as a personal computer. Usually measured in bits per second or bytes per second. Sometimes confusingly used to refer to data rate, which is independent of the actual transfer system.

transform
The process or result of replacing a set of values with another set of values. A mapping of one information space onto another.

trim
See crop.

tristimulus
A three-valued signal that can match nearly all colors of visible light in human vision. This is possible because of the three types of photoreceptors in the eye. RGB, YCbCr, and similar signals are tristimulus, and can be interchanged by using mathematical transformations (subject to possible loss of information).

TVL
Television Line. See lines of horizontal resolution.

TWG
Technical Working Group. A general term for an industry working group. Specifically, the predecessor to the CPTWG.

twos complement
The number calculated so that each bit of a binary number is inverted (ones are replaced with zeros and vice versa), then one (=000...0001b) is added ignoring the overflow.