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Encyclopedia > ATSC

Established in 1982, the Advanced Television Systems Committee (ATSC) is the group that developed the ATSC digital television standard for the United States, also adopted by Canada, Mexico, South Korea, and recently Honduras and is being considered by other countries. Year 1982 (MCMLXXXII) was a common year starting on Friday (link displays the 1982 Gregorian calendar). ... Digital television (DTV) is a telecommunication system for broadcasting and receiving moving pictures and sound by means of digital signals, in contrast to analog signals used by analog (traditional) TV. DTV uses digital modulation data, which is digitally compressed and requires decoding by a specially designed television set, or a...


ATSC standards intend to replace (in the United States) the analog NTSC television system (NTSC is used mostly in North America and Japan). The high definition television standards defined by the ATSC produce wide screen 16:9 images up to 1920×1080 pixels in size — more than six times the display resolution of the earlier standard. However, a host of different image sizes are also supported, so that up to six standard-definition "virtual channels" can be broadcast on a single TV station using the existing 6 MHz channel. The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... World map showing North America A satellite composite image of North America. ... A 32inch CRT widescreen television A widescreen image is a film image with a greater aspect ratio than the ordinary 35 millimeter frame. ... The 16:9 aspect ratio (also known as widescreen) is an aspect ratio that is 16/9 or 1. ... This is the original and proper name for the unit of resolution in visual display units (VDUs). ... Display standards comparison The display resolution of a digital television or computer display typically refers to the number of distinct pixels in each dimension that can be displayed. ... ... In telecommunications, a virtual channel is a channel designation which differs from the actual radio channel or frequency which the signal travels. ... A television station is a type of radio station that broadcasts both audio and video to television receivers in a particular area. ... MegaHertz (MHz) is the name given to one million (106) Hertz, a measure of frequency. ... Channel, in communications (sometimes called communications channel), refers to the medium used to convey information from a sender (or transmitter) to a receiver. ...


ATSC also boasts "theater quality" audio because it uses the Dolby Digital AC-3 format to provide 5.1-channel surround sound. Numerous auxiliary datacasting services can also be provided. A typical multiplex (AMC Promenade 16 in Woodland Hills, Los Angeles, United States). ... Dolby Digital is the marketing name for a series of lossy audio compression technologies by Dolby Laboratories. ... Description Dolby Digital is the trademark for Dolby Laboratories AC-3 audio coding system. ... Surround sound is the concept of expanding the spatial imaging of audio playback from 1 dimension (mono/Left-Right) to 2D or 3D. This is often performed for a more realistic audio environment, actively implemented in cinema sound systems, technical theatre, home entertainment, video arcades, computer gaming, and a growing... Multichannel audio is the name for a variety of techniques for expanding and enriching the sound of audio playback by recording additional sound channels that can be reproduced on additional speakers. ... Datacasting is the broadcasting of data over a wide area via radio waves. ...


Broadcasters who use ATSC and want to retain an analog signal must broadcast on two separate channels, as the ATSC system requires the use of an entire channel. Virtual channels allow channel numbers to be remapped from their physical RF channel to any other number 1 to 99, so that ATSC stations can either be associated with the related NTSC channel numbers, or all stations on a network can use the same number. There is also a standard for distributed transmission (DTx) which allows for booster stations. RF may mean: RF, the IATA code for Florida West International Airways RF, NYSE ticker symbol for Regions Financial Corporation Royalty free Rf or RF may stand for: Radio frequency Volumetric flow rate/rate of flow (Rf) RF connectors, electrical connectors designed to work at radio frequencies Red Faction, a... A single-frequency network or SFN is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel. ... In broadcasting, a translator is an FM radio station or a TV station which acts as a full-duplex repeater. ...


ATSC standards are marked A/x (x is the standard number) and can be downloaded freely from ATSC website (see External Links).


Many aspects of ATSC are patented, including elements of the MPEG video coding, the AC-3 audio coding, and the 8-VSB modulation[1]. As with other systems, ATSC depends on numerous interwoven standards, e.g., the EIA-708 standard for digital closed captioning, leading to variations in implementation. A patent is a set of exclusive rights granted by a state to a patentee for a fixed period of time in exchange for a disclosure of an invention. ... The Moving Picture Experts Group or MPEG is a working group of ISO/IEC charged with the development of video and audio encoding standards. ... 8VSB is the 8-level vestigial sideband modulation method adopted for ATSC standard of digital television in the USA. There are also the similar modulations 2VSB, 4VSB, and 16VSB. There has been a continuing lobby for changing the modulation for ATSC to COFDM instead, the way DVB_T is transmitted in... This page lists English translations of several Latin phrases and abbreviations, such as and . ... EIA-708 is the standard for closed captioning for ATSC digital television streams in the United States and Canada. ... A commonly-used symbol indicating that a program or movie is closed-captioned. ...

Contents

History

The official mission of ATSC was to develop a home-grown standard for digital television in the United States (although one of the things that motivated broadcasters to make a petition to US Congress was the fact that Motorola asked the Federal Communications Commission to allocate them some unused parts of TV channels spectrum). Thus the ATSC was formed in the 1983 by the US Congress. A big part of ATSC history became interwoven with the Grand Alliance, the consortium of leading companies and laboratories that developed the system. The FCCs official seal. ... Consortium created at the behest of the FCC in 1993 to develop the American HDTV specification with the aim of pooling the best work from different companies. ...


Resolution

The ATSC system supports a number of different display resolutions, aspect ratios, and frame rates. The formats are listed here by resolution, form of scanning (progressive or interlaced), and number of frames (or fields) per second (see also the TV resolution overview below): The aspect ratio of a two-dimensional shape is the ratio of its longer dimension to its shorter dimension. ... Frame rate, or frame frequency, is the measurement of the frequency (rate) at which an imaging device produces unique consecutive images called frames. ... Progressive scan Progressive or noninterlaced scanning is any method for displaying, storing or transmitting moving images in which the lines of each frame are drawn in sequence. ... Interlacing is a method of displaying images on a raster-scanned display device, such as a cathode ray tube (CRT). ...

Resolution Aspect ratio Pixel aspect ratio Form of scanning Framerate (Hz)
Vertical Horizontal
288 352 4:3 or 16:9 non-square progressive 25
480 640 4:3 square interlaced 29.97 (59.94 fields/s)
30 (60 fields/s)
progressive 23.976
24
29.97
30
59.94
60
704 4:3 or 16:9 non-square interlaced 29.97 (59.94 fields/s)
30 (60 fields/s)
progressive 23.976
24
29.97
30
59.94
60
576 352 4:3 or 16:9 non-square interlaced 25 (50 fields/s)
progressive 25
480 4:3 or 16:9 non-square interlaced 25 (50 fields/s)
progressive 25
544 4:3 or 16:9 non-square interlaced 25 (50 fields/s)
progressive 25
720 4:3 or 16:9 non-square interlaced 25 (50 fields/s)
progressive 25
50
720 1280 16:9 square progressive 23.976
24
25
29.97
30
50
59.94
60
1080 1920 16:9 square interlaced 25 (50 fields/s)
29.97 (59.94 fields/s)
30 (60 fields/s)
progressive 23.976
24
25
29.97
30

The different resolutions can operate in progressive scan or interlaced mode, although the highest 1080-line system cannot display progressive images at the rate of 59.94 or 60 frames per second. (Such technology was seen as too advanced at the time, plus the image quality was deemed to be too poor considering the amount of data that can be transmitted.) A terrestrial (over-the-air) transmission carries 19.39 megabits of data per second, compared to a maximum possible bitrate of 10.08 Mbit/s allowed in the DVD standard. The term pixel aspect ratio, sometimes shortened to aspect ratio, is also used in the context of computer graphics to describe the distribution of pixel in a digitized image. ... The hertz (symbol: Hz) is the SI unit of frequency. ... Progressive scan Progressive or noninterlaced scanning is any method for displaying, storing or transmitting moving images in which the lines of each frame are drawn in sequence. ... Interlacing is a method of displaying images on a raster-scanned display device, such as a cathode ray tube (CRT). ... The Megabit is a unit of information storage, abbreviated Mbit or sometimes Mb. ... DVD (Digital Versatile Disc or Digital Video Disc) is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ...


"EDTV" displays can reproduce progressive scan content and frequently have a 16:9 wide screen format. Such resolutions are 720×480 in NTSC or 720×576 in PAL, allowing 60 progressive frames per second in NTSC or 50 in PAL. Enhanced-definition television, extended-definition television, or EDTV is a CEA marketing shorthand term for certain digital television (DTV) formats. ...


There are three basic display sizes for ATSC. Basic and enhanced NTSC and PAL image sizes are at the bottom level at 480 or 576 lines. Medium-sized images have 720 lines of resolution and are 960 or 1280 pixels wide (for 4:3, traditional version, and 16:9, wide screen version, aspect ratio respectively). The top tier has 1080 lines either 1440 or 1920 pixels wide (here, too, for 4:3 and 16:9 aspect ratio respectively). 1080-line video is actually encoded with 1920×1088 pixel frames, but the last eight lines are discarded prior to display. This is due to a restriction of the MPEG-2 video format, which requires the number of coded luma samples (i.e., pixels) to be divisible by 16. 4:3 is a ratio. ... The 16:9 aspect ratio (also known as widescreen) is an aspect ratio that is 16/9 or 1. ... 4:3 is a ratio. ... The 16:9 aspect ratio (also known as widescreen) is an aspect ratio that is 16/9 or 1. ...


Codecs

For transport, ATSC uses the MPEG-2 systems specification, known as transport stream, to encapsulate data, subject to certain constraints. ATSC uses 188-byte MPEG transport stream packets to carry data. Before decoding of audio and video takes place, the receiver must demodulate and apply error correction to the signal. Then, the transport stream may be demultiplexed into its constituent streams. MPEG-2 is a standard for the generic coding of moving pictures and associated audio information [1]. It is widely used around the world to specify the format of the digital television signals that are broadcast by terrestrial (over-the-air), cable, and direct broadcast satellite TV systems. ... Streaming media are media that are consumed (read, heard, viewed) while it is being delivered. ... Demodulation is the act of removing the modulation from an analog signal. ... In computer science and information theory, error correction consists of using methods to detect and/or correct errors in the transmission or storage of data by the use of some amount of redundant data and (in the case of transmission) the selective retransmission of incorrect segments of the data. ... This article lacks information on the importance of the subject matter. ...


MPEG-2 video is used as the video codec, also with certain constraints. A video codec is a device or software module that enables video compression or decompression for digital video. ...


Dolby Digital AC-3 is used as the audio codec, though it was officially standardized as A/52 by the ATSC. It allows the transport of up to five channels of sound with a sixth channel for low-frequency effects (the so-called "5.1" configuration). In contrast, Japanese ISDB HDTV broadcasts use MPEG's Advanced Audio Coding (AAC) as the audio codec, which also allows 5.1 audio output. DVB (see below) allows both. Dolby Digital is the marketing name for a series of lossy audio compression technologies by Dolby Laboratories. ... An audio codec is a computer program that compresses/decompresses digital audio data according to a given audio file format or streaming audio format. ... LFE is an abbreviation that is commonly used in describing an audio track contained within a 5. ... Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. ... Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 270 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute... Established in 1982, the Advanced Television Systems Committee (ATSC) is the group that developed the ATSC digital television standard for the United States, also adopted by Canada, Mexico, South Korea, and recently Honduras and is being considered by other countries. ...


Modulation and transmission

Main articles: 8VSB, 256QAM 8VSB is the 8-level vestigial sideband modulation method adopted for terrestrial broadcast of the ATSC digital television standard in the United States and Canada. ... Quadrature Amplitude Modulation (QAM) is the encoding of information into a carrier wave by variation of the amplitude of both the carrier wave and a quadrature carrier that is 90° out of phase with the main carrier in accordance with two input signals. ...


ATSC signals are designed to use the same 6 MHz bandwidth as NTSC television channels (the interference requirements of A/53 DTV standards with adjacent NTSC or other DTV channels are very strict). Once the video and audio signals have been compressed and multiplexed, the transport stream can be modulated in different ways depending on the method of transmission. This article does not cite any references or sources. ... The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... In telecommunications, modulation is the process of varying a periodic waveform, i. ...

  • Terrestrial (local) broadcasters use 8-VSB modulation that can transfer at a maximum rate of 19.39 Mbit/s, sufficient to carry several video and audio programs and metadata.
  • Cable television stations can generally operate at a higher signal-to-noise ratio and can use 16-VSB or 256-QAM to achieve a throughput of 38.78 Mbit/s, using the same 6 MHz channel.

In recent years, cable operators have become accustomed to compressing standard-resolution video for digital cable systems, making it harder to find duplicate 6 MHz channels for local broadcasters on uncompressed "basic" cable. 8VSB is the 8-level vestigial sideband modulation method adopted for ATSC standard of digital television in the USA. There are also the similar modulations 2VSB, 4VSB, and 16VSB. There has been a continuing lobby for changing the modulation for ATSC to COFDM instead, the way DVB_T is transmitted in... The Megabit is a unit of information storage, abbreviated Mbit or sometimes Mb. ... The simplest definition of metadata is that it is data about data. ... Coaxial cable is often used to transmit cable television into the house. ... Signal-to-noise ratio (often abbreviated SNR or S/N) is an electrical engineering concept defined as the ratio of a signal power to the noise power corrupting the signal. ... 16VSB - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... Quadrature Amplitude Modulation (QAM) is the encoding of information into a carrier wave by variation of the amplitude of both the carrier wave and a quadrature carrier that is 90° out of phase with the main carrier in accordance with two input signals. ... Digital cable is a term for a type of cable digital television that delivers more channels than possible with analog cable by using digital video compression. ...


Currently, the Federal Communications Commission requires cable operators to carry the analog or digital transmission of a terrestrial broadcaster (but not both), when so requested by the broadcaster (the "must-carry rule"). The CRTC in Canada has similar rules in force with respect to ATSC signal carr1age. The FCCs official seal. ... In the United States, must-carry is a regulation by the FCC requiring that cable TV systems must carry all locally-licensed television stations. ... The Canadian Radio-television and Telecommunications Commission (CRTC, in French Conseil de la radiodiffusion et des télécommunications canadiennes) was established in 1968 by the Canadian Parliament to replace the Board of Broadcast Governors. ...


However, cable operators in the US (and to a lesser extent Canada) can determine their own method of modulation for their plants.

  • Consequently, most North American cable operators have added 256-QAM to the 16-VSB standard originally used.
  • Cable operators have still been slow to add ATSC channels to their lineups for legal, regulatory, and plant & equipment related reasons.
  • 256 QAM is a cable standard, not an ATSC standard; however, over time it is expected to be included in the ATSC standard

There is also a standard for transmitting ATSC via satellite, however this is only used by TV networks. Very few teleports outside the US support the ATSC satellite transmission standard, but teleport support for the standard is improving. Quadrature Amplitude Modulation (QAM) is the encoding of information into a carrier wave by variation of the amplitude of both the carrier wave and a quadrature carrier that is 90° out of phase with the main carrier in accordance with two input signals. ... 16VSB - Wikipedia /**/ @import /skins/monobook/IE50Fixes. ... A television network is a distribution network for television content whereby a central operation provides programming for many television stations. ...

  • The ATSC satellite transmission system is not used for direct broadcast satellite systems, which in North America have long used a system similar to DVB-S.

Direct broadcast satellite (DBS) is a term used to refer to satellite television broadcasts intended for home reception, also referred to as direct-to-home signals. ... DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 300 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC...

Other systems

A majority of the world's nations have chosen to adopt the DVB standard, as can be seen on the status list on the DVB Project website. Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 270 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute...


ATSC coexists with the DVB-T standard, and with ISDB-T being implemented in Japan. (ISDB modulation also serves as a basis of the SBTVD-T standard in Brazil.) A similar standard called ADTB was developed for use as part of China's new DMB-T/H dual standard. While China has officially chosen a dual standard, there is no requirement that a receiver work with both standards and there is no support for the ADTB modulation from broadcasters or equipment and receiver manufacturers. Taiwan (Republic of China) has chosen DVB-T COFDM as its official modulation. This was a direct result of broadcaster dissatisfaction with 8-VSB.[1] DVB-T stands for Digital Video Broadcasting - Terrestrial and it is the DVB European consortium standard for the broadcast transmission of digital terrestrial television. ... Integrated Services Digital Broadcasting (ISDB) is the digital television (DTV) and digital audio broadcasting (DAB) format. ... This article or section is in need of attention from an expert on the subject. ... DMB-T/H (GB 20600-2006) is the Peoples Republic of Chinas terrestrial digital television standard and will cover fixed and mobile terminals. ... DVB-T stands for Digital Video Broadcasting - Terrestrial and it is the DVB European consortium standard for the broadcast transmission of digital terrestrial television. ...


Because of potential use outside of existing NTSC areas, the ATSC system includes the capability to carry PAL and SECAM formatted video (576 displayable lines, 50 fields or 25 frames per second) along with NTSC (486 displayable lines, 60 x 1000/1001 fields or 30 x 1000/1001 frames per second) and film (24 frames per second). Television encoding systems by nation. ... SECAM, also written SÉCAM (Séquentiel couleur à mémoire, French for Sequential Color with Memory), is an analog color television system first used in France. ... Film is a term that encompasses individual motion pictures, the field of film as an art form, and the motion picture industry. ...


Comparison

While the ATSC system has been criticized as being complicated and expensive to implement and use, both broadcasting and receiving equipment are now comparable in cost with that of DVB.


The ATSC signal is definitely more susceptible to changes in radio propagation conditions than DVB-T and ISDB-T. If ATSC were able to dynamically change its error correction modes, code rates, interleaver mode, and randomizer, the signal could be more robust even if the modulation itself did not change. It also lacks true hierarchical modulation, which allows the SDTV part of an HDTV signal to be received even in fringe areas where signal strength is low. For this reason, an additional modulation mode, enhanced-VSB (E-VSB) has been introduced, allowing for a similar benefit. Radio propagation is a term used to explain how radio waves behave when they are transmitted, or are propagated from one point on the Earth to another. ... DVB-T stands for Digital Video Broadcasting - Terrestrial and it is the DVB European consortium standard for the broadcast transmission of digital terrestrial television. ... Integrated Services Digital Broadcasting (ISDB) is the digital television (DTV) and digital audio broadcasting (DAB) format. ... Adaptive modulation is a transmission scheme in digital communications where the transmitter adapts its transmission mode in accordance with the channel. ... In telecommunications, and particularly in radio, signal strength is the measure of how strongly a transmitted signal is being received, measured, or predicted, at a reference point that is a significant distance from the transmitting antenna. ... This article or section is in need of attention from an expert on the subject. ...


In spite of ATSC's fixed transmission mode, it is still a robust signal under various conditions. 8VSB was chosen over COFDM in part because many areas of North America are rural and have a much lower population density, thereby requiring larger transmitters and resulting in large fringe areas. In these areas, 8VSB was shown to perform better than other systems. Orthogonal frequency division modulation (OFDM, also called orthogonal frequency division multiplexing) is a technique for the modulation of digital information onto an analog carrier electromagnetic (e. ... Sign in a rural area in Dalarna, Sweden Qichun, a rural town in Hubei province, China An artists rendering of an aerial view of the Maryland countryside: Jane Frank (Jane Schenthal Frank, 1918-1986), Aerial Series: Ploughed Fields, Maryland, 1974, acrylic and mixed materials on apertured double canvas, 52... Antenna tower of Crystal Palace transmitter, London A transmitter (sometimes abbreviated XMTR) is an electronic device which with the aid of an antenna propagates an electromagnetic signal such as radio, television, or other telecommunications. ...


COFDM is used in both DVB-T and ISDB-T, and for ISDB-H, as well as DVB-H and HD Radio in the United States. In metropolitan areas, where the great and increasing majority of North Americans live, COFDM is said to be better at handling multipath. While ATSC is also incapable of true single-frequency network (SFN) operation, the distributed transmission mode, using on-channel repeaters, has been shown to improve reception under similar conditions. Thus, it may not require more spectrum allocation than DVB-T using SFNs. Official 1seg logo 1seg (Katakana: ワンセグ) is a mobile terrestrial digital audio/video and data broadcasting service in Japan. ... DVB-H (Digital Video Broadcasting - Handheld) is a technical specification for bringing broadcast services to handheld receivers. ... HD Radio is an in-band on-channel (IBOC) digital radio system created by iBiquity for broadcasting via existing FM and AM radio stations. ... This article does not cite any references or sources. ... PRIMERGY MultiPath PRIMERGY MultiPath supports redundant Fiber Channel paths, the configured connections between server and subsystem that are such an important component of disaster-tolerant servers and clusters. ... A single-frequency network or SFN is a type of radio network that operates several transmitters on a single frequency. ... In most modern usages of the word spectrum, there is a unifying theme of between extremes at either end. ... DVB-T stands for Digital Video Broadcasting - Terrestrial and it is the DVB European consortium standard for the broadcast transmission of digital terrestrial television. ...


Standards

Below are the published standards for ATSC digital television service.

  • Prior to the group's DTV work, it published A/49, a ghost-canceling reference signal for NTSC.
  • A/52B: audio data compression (Dolby AC-3 and E-AC-3)
  • A/53E: "ATSC Digital Television Standard" (the primary document governing the standard)
  • A/55: "Program Guide for Digital Television" (now deprecated in favor of A/65 PSIP)
  • A/57A: "Content Identification and Labeling for ATSC Transport" (for assigning a unique digital number to each episode of each TV show, to assist DVRs)
  • A/63: "Standard for Coding 25/50 Hz Video" (for use with PAL and SECAM-originated programming)
  • A/64A "Transmission Measurement and Compliance for Digital Television"
  • A/65C: "Program and System Information Protocol for Terrestrial Broadcast and Cable" (PSIP includes virtual channels, program guides, and content ratings)
  • A/68: "PSIP Standard for Taiwan" (defines use of Chinese alphabet via Unicode 3.0)
  • A/69: recommended practices for implementing PSIP at a TV station
  • A/70A: "Conditional Access System for Terrestrial Broadcast"
  • A/76: "Programming Metadata Communication Protocol" (XML-based PMCP maintains PSIP metadata though a TV station's airchain)
  • A/80: "Modulation and Coding Requirements for Digital TV (DTV) Applications Over Satellite"
  • A/81: "Direct-to-Home Satellite Broadcast Standard" (not yet implemented by any services)
  • A/90: "Data Broadcast Standard" (for datacasting)
  • A/92: "Delivery of IP Multicast Sessions over Data Broadcast Standard" (for IP multicasting)
  • A/93: "Synchronized/Asynchronous Trigger Standard"
  • A/94: "ATSC Data Application Reference Model"
  • A/95: "Transport Stream File System Standard" (TSFS is a special file system for downloading computer files)
  • A/96: "ATSC Interaction Channel Protocols" (interactive TV)
  • A/97: "Software Data Download Service" (used by UpdateTV for upgrades and software patches in ATSC tuners)
  • A/100: "DTV Application Software Environment - Level 1" (DASE-1)
  • A/101: "Advanced Common Application Platform" (ACAP)
  • A/110A: "Synchronization Standard for Distributed Transmission" (single-frequency networks)
  • A/112: E-VSB

Television interference (ghosting) In television, a ghost is an image on the screen which doesnt belong there, appearing superimposed on the desired image. ... In general, a reference is something that refers to or designates something else, or acts as a connection or a link between two things. ... An analog or analogue signal is an allergy continuous in both time and amplitude. ... Audio compression is a form of data compression designed to reduce the size of audio files. ... Dolby Digital is the marketing name for a series of lossy audio compression technologies by Dolby Laboratories. ... Dolby Digital Plus (DD+), also known as E-AC-3, was developed specifically for the introduction of HDTV and HD-DVD/Blu-ray discs. ... In computer software standards and documentation, deprecation is the gradual phasing-out of a software or programming language feature. ... TV Show Reference Episode is the word usually used to refer to a part of a serial television or radio program. ... A television program is the content of television broadcasting. ... Foxtel IQ, a digital video recorder and a satellite cable set-top box. ... The Program and System Information Protocol is the protocol used in the ATSC digital television standard for carrying data about each channel. ... Content rating most often means the suitability-to-audience rating of TV broadcast, movies, comic books, or computer games. ... 漢字 / 汉字 Chinese character in Hanzi, Kanji, Hanja, Hán Tự. Red in Simplified Chinese. ... Unicode is an industry standard designed to allow text and symbols from all of the writing systems of the world to be consistently represented and manipulated by computers. ... The Extensible Markup Language (XML) is a general-purpose markup language. ... The simplest definition of metadata is that it is data about data. ... In broadcast engineering for radio, the airchain (sometimes air chain (US) or network chain (UK)) is the path or route an audio or video signal takes on its way through a radio station or television station. ... In computing, a file system (often also written as filesystem) is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. ... This article is about the computer terms. ... A computer file is a collection of information that is stored in a computer system and can be identified by its full path name. ... Interactive television describes any number of efforts to allow viewers to interact with television content as they view. ... UpdateLogic Incorporated (formerly Broadcast Data Corporation) is a company which has developed a system for datacasting firmware upgrades to digital television devices. ... Look up Upgrade on Wiktionary, the free dictionary Upgrading is the process of replacing an older thing with a newer thing. ... A software release is to create a new version of the system or program and release it to the user community. ... Advance Television Systems Committe (ATSC) tuner allows reception of over the air high definition digital television signals in North America and South Korea. ... The Advanced Common Application Platform (ACAP) is intended to provide television consumers with advanced interactive services and offer content providers, broadcasters, cable and satellite operators, and consumer electronics manufacturers the technical details necessary to develop interoperable services and products. ... A single-frequency network or SFN is a type of radio network that operates several transmitters on a single frequency. ...

Mobile TV

Because the FCC forced broadcasters to use 8VSB modulation instead of COFDM, mobile reception of digital stations has (up till now) been difficult to impossible, especially when moving at vehicle speeds. To overcome this, there are now at least three standards which claim to improve mobile reception: Samsung's A-VSB, Harris and LG's MPH, and now the ATSC's own ATSC-M/H. This is in addition to other proprietary standards like MediaFLO, and worldwide open standards like DVB-H and DMB-T. Like DVB-H and ISDB 1seg, the proposed ATSC mobile standards are backward-compatible with existing tuners, despite being added to the standard well after the original standard was in wide use. Mobile reception of some stations will still be more difficult because the FCC sold-off the rights to 18 of the UHF channels, forcing several broadcasters to stay on VHF. This band requires larger antennas for reception, and is more prone to impulse noise from engines and rapidly-changing multipath conditions, areas where ATSC's 8VSB is inferior to other standards COFDM. Samsung Group is one of the largest South Korean business groupings. ... This article or section is in need of attention from an expert on the subject. ... Harris Corporation NYSE: HRS is an international communications equipment company that produces wireless equipment, electronic systems, and both terrestrial and spaceborne antennas for use in the government, defense, and commercial sectors. ... LG can refer to a number of things: LG Group, a South Korean electronics and petrochemicals conglomerate. ... This article or section is in need of attention from an expert on the subject. ... The Advanced Television Systems Committee (ATSC) announced on April 9, 2007 development of a new standard ATSC-M/H to enable broadcasters to deliver television content and data to mobile and handheld devices via their DTV broadcast signal. ... MediaFLO is Qualcomms new technology to broadcast video to portable devices, like cell phones. ... DVB-H (Digital Video Broadcasting - Handheld) is a technical specification for bringing broadcast services to handheld receivers. ... Possible meanings: Dave Matthews Band Diamond Mind Baseball Digital Multimedia Broadcasting DMB Consulting Services This page expands a three-character combination which might be any or all of an abbreviation, an acronym, an initialism, a word in English, or a word in another language. ... Official 1seg logo 1seg (Katakana: ワンセグ) is a mobile terrestrial digital audio/video and data broadcasting service in Japan. ... In technology (especially computing), backward compatibility has several related but differing meanings: A system is backward compatible if it is compatible with earlier versions of itself, or sometimes other earlier systems, particularly systems it intends to supplant. ... Radio Frequency Interference (RFI) is electromagnetic radiation which is emitted by electrical circuits carrying rapidly changing signals, as a by-product of their normal operation, and which causes unwanted signals (interference or noise) to be induced in other circuits. ... An engine is something that produces an effect from a given input. ... PRIMERGY MultiPath PRIMERGY MultiPath supports redundant Fiber Channel paths, the configured connections between server and subsystem that are such an important component of disaster-tolerant servers and clusters. ...


Video resolution overview

Digital video resolutions
Designation Usage examples Definition (lines) Rate (Hz)
Interlaced (fields) Progressive (frames)
Low; MP@LL LDTV, VCD 240; 288 (SIF) 24, 30; 25
Standard; MP@ML SDTV, SVCD, DVD, DV 480 (NTSC, PAL-M) 60 24, 30
576 (PAL, SECAM) 50 25
Enhanced EDTV 480; 576 60; 50
High; MP@HL HDTV, HD DVD, Blu-ray Disc, HDV 720 24, 30, 60; 25, 50
1080 50, 60 24, 30; 25
This table illustrates total horizontal and vertical pixel resolution via box size. It does not accurately reflect the screen shape (aspect ratio) of these formats, which is either 4:3 or 16:9.

Display standards comparison The display resolution of a digital television or computer display typically refers to the number of distinct pixels in each dimension that can be displayed. ... For the method of incrementally displaying raster graphics, see Interlace (bitmaps). ... Progressive scan Progressive or noninterlaced scanning is any method for displaying, storing or transmitting moving images in which the lines of each frame are drawn in sequence. ... MPEG-2 is a standard for the generic coding of moving pictures and associated audio information [1]. It is widely used around the world to specify the format of the digital television signals that are broadcast by terrestrial (over-the-air), cable, and direct broadcast satellite TV systems. ... Low-definition television or LDTV refers to television systems that have a lower resolution than Standard Definition Television systems. ... Video CD (aka VCD, VideoCD, View CD, Compact Disc digital video) is a standard digital format for storing video on a Compact Disc. ... An acronym for Standard Input Format, this video format was developed to allow the storage and transmission of digital video. ... ... ... ... Standard-definition television or SDTV refers to television systems that have a lower resolution than HDTV systems. ... Compact Disc Super Video (SVCD) logo/trademark Super Video CD (Super Video Compact Disc or SVCD) is a format used for storing video on standard compact discs. ... DVD (Digital Versatile Disc or Digital Video Disc) is an optical disc storage media format that can be used for data storage, including movies with high video and sound quality. ... A MiniDV Camcorder For other uses, see DV (disambiguation). ... The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... PAL-M is the TV system used in Brazil. ... 480i is the shorthand name for a video mode. ... 480p is the shorthand name for a video mode. ... Television encoding systems by nation. ... SECAM, also written SÉCAM (Séquentiel couleur à mémoire, French for Sequential Color with Memory), is an analog color television system first used in France. ... 576i is the shorthand name for a video mode. ... 576p is the shorthand name for a video mode. ... Enhanced-definition television, extended-definition television, or EDTV is a CEA marketing shorthand term for certain digital television (DTV) formats. ... 480p is the shorthand name for a video mode. ... 576p is the shorthand name for a video mode. ... Projection screen in a home theater, displaying a high-definition television image. ... HD-DVD disc HD DVD (for High Density Digital Versatile Disc) is a digital optical media format which is being developed as one standard for high-definition DVD. HD DVD is similar to the competing Blu-ray Disc, which also uses the same CD sized (120 mm diameter) optical data... A Blu-ray Disc (also called BD) is a high-density optical disc format for the storage of digital media, including high-definition video. ... High Definition Video (HDV) is a video format designed to record compressed HDTV video on standard DV media (DV or MiniDV cassette tape). ... JOHN HERMAN SUCKS FAT DICK ... 1080i is shorthand name for a category of video modes. ... 1080p is a format of high definition broadcast. ... Image File history File links Common_Video_Resolutions. ...

Other uses for the ATSC waveform [dubious ]

The ATSC waveform is excellent for autoranging on Earth Moon Earth (Moonbounce or EME) telecommunications circuits. Earth-Moon-Earth is a radio communication which relies on the propagation of radio waves from an earth based transmitter directed via reflection from the surface of the moon back to an earth based receiver. ...


However, the amateur radio and astronomy community has not developed a slower speed version of the ATSC waveform for experimentation. The ATSC standards keeping organization has not worked to develop slower data rate versions of the signal for other uses.

  • slowing the datarate of ATSC to 2 mbs would be enough to allow for very robust amateur television
  • at even slower datarates like 512 kbs, ATSC becomes very optimal for EME circuits, but would still be capable of transmitting video

Amateur television (ATV) is the hobby of transporting broadcast-quality video and audio over radio waves allocated for amateur radio using the broadcast standards of NTSC in North America and Japan, and PAL or SECAM in Europe and elsewhere, using the full refresh rates of those standards. ...

Notes

  1. ^ Argentina officially chose ATSC in 1998, and has been conducting experimental ATSC broadcasts since 1999. The governments of Argentina and Brazil had decided independently which digital TV standard each nation would deploy, but have recently agreed to work together to implement a single standard for the Mercosur customs union. The current government in Argentina, however, appears to be reconsidering its earlier decision. ATSC and DVB are apparently both being considered, but there appears to be no interest in ISDB.

Later 10/26/06 Official Languages Portuguese, Spanish and Guaraní Members  Argentina (1991)  Brazil (1991)  Paraguay (1991)  Uruguay (1991)  Venezuela (2006)2 Associate Members  Bolivia (1997)  Chile (1996)  Colombia (2004)  Ecuador (2004)  Peru (2003) Observer  Mexico (2004)3 Presidency Carlos Chacho Álvarez Seat of Secretariat Montevideo Area 12. ...


Argentina did reconsider its choice of 8-VSB, but has been sitting on the fence for a number of years. On November 17, 2006, the three standards (DVB, ATSC and ISDB) were presented to Argentinian Government officials, but no decision to change the standard has been made. Brazil has now chosen ISDB-T and this decision may influence other Central and South American countries to follow their lead.


See also

Advance Television Systems Committe (ATSC) tuner allows reception of over the air high definition digital television signals in North America and South Korea. ... A broadcast flag is a set of status bits (or flags) sent in the data stream of a digital television program that indicates whether or not it can be recorded, or if there are any restrictions on recorded content. ... Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 270 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute... EIA-708 is the standard for closed captioning for ATSC digital television streams in the United States and Canada. ... OpenCable is a set of specifications created by CableLabs to Define the next-generation of advanced digital cable-ready devices. OpenCable uses SCTE standards for the video, transport and various interface requirements, but also adds a requirement for a Java based interpreter and an encryption system employing CableCARDs. ...

External links

  • ATSC website
  • ATSC standards download page
  • The common ATSC formats represented in different criteria
  • What exactly is ATSC?

  Results from FactBites:
 
ATSC - Wikipedia, the free encyclopedia (1053 words)
Broadcasters who use ATSC and must retain an analog signal have to broadcast on two separate channels, as the ATSC system requires use of an entire six megahertz channel.
The standards ATSC depends on are often ambiguous, one example would be the EIA-708 standard for closed captioning.
ATSC signals are designed to use the same 6 MHz bandwidth as NTSC television channels.
  More results at FactBites »

 
 

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