F

[This is preliminary documentation and subject to change.]

field

In broadcast television, one of two sets of alternating lines in an interlaced video frame. In one field, the odd-numbered lines of video are drawn; in the other, the even-numbered lines are drawn. When interlaced, the two fields combine to form a single frame of on-screen video.

File Transfer Protocol

(FTP) A protocol that supports file transfers to and from remote systems on a network using Transmission Control Protocol/Internet Protocol (TCP/IP), such as the Internet. FTP supports several commands that allow bidirectional transfer of binary and ASCII files between systems. See also Hypertext Transport Protocol (HTTP).

File Transfer Service

(FTS) A component of Microsoft® NetShow™ server that can send files using a multicast transfer mechanism that includes forward error correction.

filter

See announcement filter, DirectShow filter, or KSProxy filter.

filter graph

A connected set of DirectShow filters that processes media data by controlling KSProxy filters.

filter graph manager

An object that controls how a filter graph is assembled and how data is moved through it. Applications can use the filter graph manager implicitly, allowing it to construct an appropriate filter graph for a specified media format. Applications can also access the filter graph manager explicitly — for example, to add a proprietary filter to a filter graph.

forward error correction

A system of error correction that incorporates redundancy into data so transmission errors can, in many cases, be corrected without requiring retransmission.

frame

In broadcast television, a single screen-sized image that can be displayed in sequence with other slightly different images to animate drawings. For NTSC video, a video frame consists of two interlaced fields of 525 lines; NTSC video runs at 30 frames per second. For PAL or SECAM video, a video frame consists of two interlaced fields of 625 lines; PAL and SECAM video runs at 25 frames per second. In comparison, film runs at 24 frames per second.

FTP

See File Transfer Protocol.

FTS

See File Transfer Service.