T

TAPI

Telephony Application Program Interface. A set of Win32-based calls that applications use to control modems and telephones by routing application function calls to the appropriate service provider DLL for a modem.

telephony

Telephone technology. The conversion of sound into electrical signals, its transmission to another location, and its reconversion to sound, with or without the use of connecting wires.

timecode

For MPEG, frame-by-frame address code time reference recorded on the spare track of a videotape or inserted in the vertical blanking interval. It is an eight-digit number, encoding time in hours, minutes, seconds, and video frames (for example, 02:04:48:26).

transform

A set in kernel streaming and ActiveMovie that defines the access to a filter actually provided by a pin. Each pin supports one transform.

tuple

A data structure defined by the PCMCIA to describe a single, specific characteristic of a PC Card device. Tuples are chained together to form the CIS, which describes to system software the PC Card's resource requirements and other characteristics. Tuples consist of a tuple code, an offset to the next tuple, and a number of bytes specific to the tuple.

TWAIN

API for image acquisition developed by an association of industry leaders. The specification is available from http://www.twain.org.