Extended Data Services (now XDS, previously EDS), is an American standard classified under Electronic Industries Alliance standard EIA-766 for the delivery of any ancillary data (metadata) to be sent with an analog television program, or any other NTSC video signal. The Electronic Industries Alliance (EIA) is a trade organization for electronics manufacturers in the United States. ... The Electronic Industries Alliance (EIA) is a trade organization for electronics manufacturers in the United States. ... A datum is a statement accepted at face value (a given). Data is the plural of datum. ... Metadata (Greek: meta-+data information), literally data about data, is information that describes another set of data. ... Analog television encodes picture information by varying the voltages and/or frequency of the signal. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Video (from Latin, I see) is the technology of processing electronic signals for representing moving pictures. ... Signaling, or a signal, may mean: Look up signal in Wiktionary, the free dictionary Scientific concepts In information theory, a signal is a flow of information that can be represented as a mathematical function. ...

XDS is used by TV stations, TV networks, and TV program syndication distributors in the USA for several purposes. A television station is a type of radio station that broadcasts both audio and video to television receivers in a particular area. ... A television network is a distribution network for television content whereby a central operation provides programming for many television stations. ... A television program is the content of television broadcasting. ... In the entertainment and news industries, syndication is a method of making content available to a range of outlets simultaneously. ... Distributor cap. ...

Here are some of the most common uses of XDS:

• For time data for automatically setting the clock of newer TVs & VCRs sold in the USA,
• Rudimentary program information which can be displayed on-screen, such as the name and remaining time of the program,
• V-chip content ratings data,
• and also for carrying CGMS-A (Copy Generation Management System - Analog) data used by personal video recorders such as TiVo and ReplayTV for copy prevention, and sometimes to cripple any sort of recording whatsoever from cable TV or DVD.

XDS is also used by the American TV network ABC for their Network Alert System (NAS). NAS is a one-way communication system used by ABC to inform and alert their local affiliate stations across the USA of information regarding ABC's network programming (such as program timings & changes, news special report information, etc.), using a special decoder manufactured for ABC by EEG Enterprises [1], a manufacturer of related equipment for the TV broadcast industry such as closed captioning and general-purpose XDS encoders. 8:17 am, August 6, 1945, Japanese time. ... A clock (from the Latin cloca, bell) is an instrument for measuring time. ... See TV (disambiguation) for other uses and Television (band) for the rock band European networks National In much of Europe television broadcasting has historically been state dominated, rather than commercially organised, although commercial stations have grown in number recently. ... The video cassette recorder (or VCR, less popularly video tape recorder) is a type of video tape recorder that uses removable cassettes containing magnetic tape to record audio and video from a television broadcast so it can be played back later. ... V-chip is a generic term used for a feature of television receivers allowing the blocking of programs based on their ratings category. ... The personal video recorder (PVR), also called digital video recorder (DVR) or digital personal video recorder, is a consumer electronics device that records television shows to a hard disk in digital format. ... The TiVo (tÄ“-vō) personal video recorder is the most popular brand of Digital Video Recorder, a consumer video device which allows users to capture television programming to internal hard drive storage for later viewing (sometimes called time shifting). TiVo systems function similarly to VCRs, but use non-removable hard... ReplayTV is a personal video recorder manufactured by Digital Networks North America, Inc. ... Copy prevention, also known as copy protection, is any technical measure designed to prevent duplication of information. ... Cable television or Community Antenna Television (CATV) (and often shortened to cable) is a system of providing television, FM radio programming and other services to consumers via radio waves transmitted directly to people’s televisions through fixed coaxial cables as opposed to the over-the-air method used in traditional... DVD is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ... . The American Broadcasting Company (ABC) is a television and radio network in the United States. ... An affiliate is an entity with a relationship with a peer or a larger entity. ... A decoder is a device which does the reverse of an encoder, undoing the encoding so that the original information can be retrieved. ... A commonly-used symbol indicating that a program or movie is closed-captioned Closed captioning (CC) allows deaf and hard of hearing / hearing-impaired people, people learning English as an additional language, people first learning how to read, and others to read a transcript of the audio portion of a... An encoder is a device used to encode a bitstream or other signal or data into a form that is acceptable for transmission or storage. ...

XDS uses the same line in the VBI as closed captioning (NTSC line 21), but it utilizes the second video field (as opposed to closed captioning's line 21, field 1). The vertical blanking interval (VBI) is an interval in a television or VDU signal that temporarily suspends transmission of the signal for the electron gun to move back up to the first line of the television screen to trace the next screen field. ...