CEA-708 captions, which were introduced for use with digital television, follow much more advanced standards than 608 captions. These captions provide user control options for appearance, allowing the viewer to select from 8 font options, 3 text sizes, 64 text colors, and 64 background colors. The suffix '+subcc' can be appended to the output label to create an extra stream with the closed captions packets attached to that output (experimental; only for EIA-608 / CEA-708 for now). The subcc streams are created after all the normal streams, in the order of the corresponding stream. Traditionally, TV broadcasters have relied on specialized hardware to verify closed caption data (CEA-608 and CEA-708) from baseband SDI video sources. This includes HD and SD tape decks, server play-out, and non-linear editing systems with caption compatible hardware. The signal in SDI may contain line 21 for SD and line 9 data for HD video. Currently FFmpeg interprets both 'mediatypemstvcaption' and 'mediasubtypedtvccdata' as AVCODECIDDVBTELETEXT (see extract from wtvdec.c below). That now looks to be wrong. Mediasubtypedtvccdata is a variant of CEA-708.

1. Ffmpeg Cea 708 Din
2. Ffmpeg Cea-708
3. Ffmpeg Cea 708 Test

#726closedenhancement (fixed)

Attachments (2)

Change History (19)

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Standard for closed captioning for ATSC digital television streams in the United States and Canada.Wikipedia

• EIA-608

  EIA-608, also known as 'line 21 captions' and 'CEA-608', used to be the standard for closed captioning for NTSC TV broadcasts in the United States, Canada and Mexico. Means for including a VCR control service with an electronic program guide for NTSC transmissions that operates on the even line 21 field, similar to the TeleText based VPS that operates on line 16 which is used in PAL countries.Wikipedia

• ATSC standards

  Advanced Television Systems Committee (ATSC) standards are a set of standards for digital television transmission over terrestrial, cable, and satellite networks. Largely a replacement for the analog NTSC standard, and like that standard, used mostly in the United States, Mexico and Canada.Wikipedia

• Advanced Television Systems Committee

  Group, established in 1982, that developed the eponymous ATSC standards for digital television in the United States. These standards have also been adopted by Canada, Mexico, South Korea and recently Honduras, and are being considered by other countries.Wikipedia

• List of ATSC standards

  Below are the published ATSC standards for ATSC digital television service, issued by the Advanced Television Systems Committee. Amended to support Enhanced ATSC ; this transmission mode is backwardly compatible with the original 8-Bit Vestigal Sideband modulation scheme, but provides much better error correction.Wikipedia

• Closed captioning

  Closed captioning (CC) and subtitling are both processes of displaying text on a television, video screen, or other visual display to provide additional or interpretive information. Both are typically used as a transcription of the audio portion of a program as it occurs (either verbatim or in edited form), sometimes including descriptions of non-speech elements.Wikipedia

• ATSC 3.0

  Major version of the ATSC standards for television broadcasting created by the Advanced Television Systems Committee . ATSC 3.0 comprises around 20 standards covering different aspects of the system and in total will have over 1,000 pages of documentation.Wikipedia

Ffmpeg Cea-708

• Digital television in Canada

  Transmitted using the ATSC standard. Because Canada and the U.S. use the same standard and frequencies for channels, people near the Canada–United States border can watch digital television programming from television stations in either country where available.Wikipedia

• 8VSB

  Modulation method used for broadcast in the ATSC digital television standard. Used primarily in North America; in contrast, the DVB-T standard uses COFDM.Wikipedia

• NTSC

  Analog television color system that was introduced in North America in 1954 and stayed in use until digital conversion. One of three major analog color television standards, the others being PAL and SECAM.Wikipedia

• E-VSB

  Optional enhancement to the original ATSC Standards that use the 8VSB modulation system used for transmission of digital television. Intended for improving reception where signals are weaker, including fringe reception areas, and on portable devices such as handheld televisions or mobile phones.Wikipedia

• ATSC tuner

  ATSC receiver or HDTV tuner, is a type of television tuner that allows reception of digital television (DTV) television channels that use ATSC standards, as transmitted by television stations in North America, parts of Central America, and South Korea. Such tuners are usually integrated into a television set, VCR, digital video recorder (DVR), or set-top box which provides audio/video output connectors of various types.Wikipedia

• Digital Video Broadcasting

  Set of international open standards for digital television. International industry consortium, and are published by a Joint Technical Committee of the European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).Wikipedia

• Digital television adapter

  Television tuner that receives a digital television (DTV) transmission, and converts the digital signal into an analog signal that can be received and displayed on an analog television set. The input digital signal may be over-the-air terrestrial television signals received by a television antenna, or signals from a digital cable system.Wikipedia

• Broadcast television systems

  Terrestrial television systems (or Broadcast television systems in the US and Canada) are the encoding or formatting standards for the transmission and reception of terrestrial television signals. There were three main analog television systems in use around the world until the late 2010s (expected): NTSC, PAL, and SECAM.Wikipedia

• High-definition television

  Television system providing an image resolution that is of substantially higher resolution than that of standard-definition television (SDTV). This can be either analog or digital television.Wikipedia

• DVB-T

  Abbreviation for 'Digital Video Broadcasting — Terrestrial'; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998. MPEG transport stream, using coded orthogonal frequency-division multiplexing modulation.Wikipedia

• Digital television transition in the United States

  The switchover from analog to exclusively digital broadcasting of terrestrial television television programming. Introduced.'Wikipedia

• Digital subchannel

  In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel. Done by using data compression techniques to reduce the size of each individual program stream, and multiplexing to combine them into a single signal.Wikipedia

• DVB-C

  DVB European consortium standard for the broadcast transmission of digital television over cable. MPEG-2 or MPEG-4 family digital audio/digital video stream, using a QAM modulation with channel coding.Wikipedia

• FFmpeg

  Free and open-source project consisting of a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams. FFmpeg program itself, designed for command-line-based processing of video and audio files, and widely used for format transcoding, basic editing , video scaling, video post-production effects, and standards compliance (SMPTE, ITU).Wikipedia

• Television standards conversion

  Process of changing one type of television system to another. From NTSC to PAL or the other way around.Wikipedia

• Integrated digital television

  Television set with a built in digital Tuner, be it for DVB-T2, DVB-S2, DVB-C, DMB-T/H, ATSC standards or ISDB. Most of them also allow reception of analogue signals (PAL, SÉCAM or NTSC).Wikipedia

• ISDB

  Japanese standard for digital television (DTV) and digital radio used by the country's radio and television networks. ISDB replaced NTSC-J analog television system and the previously used MUSE Hi-vision analogue HDTV system in Japan, and will be replacing NTSC, PAL-M and PAL-N in South America and the Philippines.Wikipedia

• ATSC-M/H

  U.S. standard for mobile digital TV that allows TV broadcasts to be received by mobile devices. Mobile TV extension to preexisting terrestrial TV broadcasting standard ATSC A/53.Wikipedia

• Teletext

  Videotex standard for displaying text and rudimentary graphics on suitably equipped television sets. Teletext sends data in the broadcast signal, hidden in the invisible vertical blank interrupt area at the top and bottom of the screen.Wikipedia

• Xilleon

  Brand for a family of SoCs combining a low-power CPU with ASICs for accelerated video decompression and further functions for major worldwide broadcast networks targeting digital television (i.e. products like set-top boxes, Integrated digital television, digital television adapters, smart TVs, etc.). Most Xilleon-branded SoCs have aWikipedia

• List of EIA standards

  List of Electronic Industries Alliance Standards. The EIA ceased operations on February 11, 2011, but the former sectors continue to serve the constituencies of EIA.Wikipedia

• HDMI

  Proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, to a compatible computer monitor, video projector, digital television, or digital audio device. Digital replacement for analog video standards.Wikipedia

• Video coding format

  Content representation format for storage or transmission of digital video content (such as in a data file or bitstream). It typically uses a standardized video compression algorithm, most commonly based on discrete cosine transform (DCT) coding and motion compensation.Wikipedia

• List of Canadian television networks

  Canada has adopted the NTSC and ATSC television transmission standards without any alterations. However, some unique local variations exist for DTH television because of transponder design variation in the Anik series of satellites.Wikipedia

Sentences forCEA-708

• 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.ATSC standards-Wikipedia
• Most broadcasters and networks to avoid large conversion cost outlays just provide EIA-608 captions along with a transcoded CEA-708 version encapsulated within CEA-708 packets.Closed captioning-Wikipedia
• The full EIA-708 standard for digital television has worldwide character set support, but there has been little use of it due to EBU Teletext dominating DVB countries, which has its own extended character sets.Closed captioning-Wikipedia
• Up until this time, it was not possible for video editors to insert caption data with both CEA-608 and CEA-708 to their tape masters.Closed captioning-Wikipedia
• For ATSC (digital television) programming, three streams are encoded in the video: two are backward compatible 'line 21' captions, and the third is a set of up to 63 additional caption streams encoded in EIA-708 format.Closed captioning-Wikipedia
• ATSC broadcasts instead use the EIA-708 caption protocol to encapsulate both the EIA-608 caption pairs as well as a native EIA-708 stream.EIA-608-Wikipedia

Ffmpeg Cea 708 Test

• The full version of EIA-708 has support for more character sets and better caption positioning options; however, because of existing EIA-608 hardware and revisions to the format, there has been little or no real world use of the format besides simple 608 to 708 inline conversions.EIA-608-Wikipedia
• The US ATSC digital television system originally specified two different kinds of closed captioning datastream standards: the original analog-compatible (available by Line 21) and the more modern digital-only CEA-708 formats are delivered within the video stream.Closed captioning-Wikipedia
• In 2006 Ascender released numerous products for hardware and software developers including a font set that meets the EIA-708-B standard for Digital TV Closed Captioning (DTVCC), large Unicode compliant fonts and fonts for HD DVD authors and publishers designed to enhance the on-screen experience that is part of an HD DVD's Advanced Content.Ascender Corporation-Wikipedia

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