H

[This is preliminary documentation and subject to change.]

hardware-specific interface functions

A set of routines that a hardware vendor must implement to add broadcast network functionality.

HDTV

See high-definition television.

head end

The origin of signals in a terrestrial, cable, satellite, or network broadcast system. In Broadcast Architecture, the server infrastructure that gathers, coordinates, and broadcasts data is generally located at the broadcast head end.

high-definition television

(HDTV) Television that is delivered at a higher screen resolution than NTSC, PAL, SECAM, or other existing standards provide for.

HTML

See Hypertext Markup Language.

HTTP

See Hypertext Transport Protocol.

Hypertext Markup Language

(HTML) A markup language used to create hypertext documents that are portable from one platform to another. HTML files are text files with embedded codes, or markup tags, that indicate formatting and hypertext links. HTML is used for formatting documents on the World Wide Web.

Hypertext Transport Protocol

(HTTP) The underlying, application-level protocol by which World Wide Web clients and servers communicate on the Internet. See also File Transfer Protocol.