List of ATSC standards

Below are the published ATSC standards for ATSC digital television service, issued by the Advanced Television Systems Committee.

A/49: Ghost Canceling Reference Signal for NTSC (for adjacent-channel interference or co-channel interference with analog NTSC stations nearby)
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, electronic program guides, and content ratings)
A/68: "PSIP Standard for Taiwan" (defines use of Chinese characters via Unicode 3.0)
A/69: recommended practices for implementing PSIP at a TV station
A/70A: "Conditional Access System for Terrestrial Broadcast"
A/71: "ATSC Parameterized Services Standard"
A/72: "Video System Characteristics of AVC in the ATSC Digital Television System" (implementing H.264/MPEG-4 as well as MVC for 3D television)
A/76: "Programming Metadata Communication Protocol" (XML-based PMCP maintains PSIP metadata though a TV station's airchain)
A/79: "Conversion of ATSC Signals for Distribution to NTSC Viewers" (recommended practice, issued February 2009)
A/80: "Modulation and Coding Requirements for Digital TV (DTV) Applications Over Satellite" (ATSC-S)
A/81: "Direct-to-Home Satellite Broadcast Standard" (not yet implemented by any services)
A/82: "Automatic Transmitter Power Control (ATPC) Data Return Link (DRL) Standard"
A/85: "Techniques for Establishing and Maintaining Audio Loudness for Digital Television"
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/98: "System Renewability Message Transport"
A/99: "Carriage Of Legacy TV Data Services" (for former analog supplemental services that used the vertical blanking interval lines, such as closed captioning and teletext)
A/100: "DTV Application Software Environment - Level 1" (DASE-1)
A/101: "Advanced Common Application Platform" (ACAP)
A/103:2014: "Non-Real-Time Delivery"
A/104: "ATSC 3D-TV Terrestrial Broadcasting"
A/105:2015: "Interactive Services Standard"
A/106:2015: "ATSC Security and Service Protection Standard"
A/107:2015: "ATSC 2.0 Standard"
A/110A: "Synchronization Standard for Distributed Transmission" (single-frequency networks)
A/112: E-VSB (Enhanced Vestigal Sideband)
A/153: ATSC-M/H

In 2004, the main ATSC standard was amended to support Enhanced ATSC (A/112); this transmission mode is backwardly compatible with the original 8-Bit Vestigal Sideband modulation scheme, but provides much better error correction.

ATSC-M/H for mobile TV has been approved and added to some stations, though it is known that it uses MPEG-4 instead of MPEG-2 for encoding, and behaves as an MPEG-4-encoded subchannel, inheriting 8VSB from the remainder of the channel.

ATSC 3.0

Main article: ATSC 3.0

ATSC 3.0 is a non-backwards-compatible version of ATSC being developed (as of May 18, 2016) that uses OFDM instead of 8VSB and a much newer video codec (instead of ATSC 1 and 2's MPEG-2). At the time of this article's writing, it has several candidate and one finalized standard.

On March 28, 2016, the Bootstrap component of ATSC 3.0 (System Discovery and Signalling) was upgraded from candidate standard to finalized standard.^[1]

On May 4, 2016, the Audio Codec component of ATSC 3.0 was elevated to candidate standard, with two finalists remaining: Dolby AC-4^[2] and MPEG-H Audio Alliance format from Fraunhofer IIS, Qualcomm and Technicolor SA.^[3]^[4] A third entry from DTS named DTS:X (a successor to DTS-HD) was withdrawn before the standard was upgraded to candidate status.^[5]

On September 8, 2016, the Physical Layer Download (OFDM) component of ATSC 3.0 was upgraded from candidate standard to finalized standard.^[6]

On October 5, 2016, the Link Layer Protocol Standard (A/330) was elevated from Candidate to final standard, along with the Audio Watermark Emission Standard (A/334) and Video Watermark Emission Standard (A/335). ATSC Technology Group 3 (TG3) members have also begun voting on elevating the following Candidate Standards to Proposed Standard status (the final step before becoming an approved standard): Service Announcement (A/322), Service Usage Reporting (A/333) and Captions and Subtitles (A/343). TG3 members also are voting to elevate Security (A/360) to Candidate Standard status, joining Schedule and Studio-to-Transmitter Link Standard (A/324), which was recently elevated.^[7] On March 30, 2016, A/324 (Schedule and Studio-to-Transmitter Link) was upgraded from Proposed to Candidate Standard.

ATSC 3.0's multiple layers. The standards within ATSC 3.0 are rolled into each of the layers.

Structure/ATSC 3.0 System Layers^[8]

Bootstrap: System Discovery and Signalling
Physical Layer: Transmission (OFDM)
Link Layer Protocols: IP, MMT
Presentation: Audio and Video standards (to be determined), Ultra HD with High Definition and standard definition multicast, Immersive Audio
Applications: Screen is a web page

Finalized Standards

A/321: System Discovery and Signalling
A/322: Physical Layer Download
A/330: Link Layer Protocol
A/334: Audio Watermark Emission
A/335: Video Watermark Emission

Candidate Standards

A/300: ATSC 3.0^[9]
A/323: Physical Layer Upload
A/324: Schedule and Studio-to-Transmitter Link
A/330: Link Layer Protocol
A/331: Signaling, Delivery, Synchronization, and Error Protection
A/332: Service Announcement
A/333: Service Usage Reporting
A/336: Content Recovery in Redistribution Scenarios
A/338: Companion Device
A/341: Video Standard (H.265, Scalable HEVC with HDR) ^[10]^[11]
A/342: Audio Standard^[12]
A/342 Part 1: Audio Common Elements
A/342 Part 2: AC-4 System
A/343 Part 3: MPEG-H AA System
A/343: Captions and Subtitles
A/344: Application Runtime Environment Standard (apps for advanced televisions)
A/345: Personalization

Under Consideration - Working Drafts and Recommended Practices

A/325: Recommended Practice: TG3/S32 Lab Performance Test Plan
A/326: Working Draft Recommended Practice: Field Test Plan
A/360: Security (encryption for broadcasters) (Working Draft)

References

External links

ATSC standards

Digital television in North America

Terrestrial

Digital broadcasting	ATSC tuners Digital subchannels Virtual channels Distributed transmission system Datacasting Guide Plus National Datacast UpdateLogic Metropolitan Television Alliance Grand Alliance

Digital switchover	All-Channel Receiver Act SAFER Act Digital channel election Set-top boxes Digital television adapter U.S. Converter Box Coupon Program legislation Analog passthrough DVD recorders Digital video recorders

Digital standards	ATSC Standards ATSC ATSC-M/H 8VSB A-VSB E-VSB PSIP PMCP full list Standard-definition TV 480i 576i Enhanced-definition TV 480p 576p High-definition TV 720p 1080i 1080p Serial digital interface Smart antennas CEA-909

Digital networks	see Template:American broadcast television Template:Canadian television networks

National deployment	List by country Canada Mexico United States HDTV transition wireless spectrum auction

Cable

Digital cable	Digital-cable-ready TV QAM tuners Interactive-digital-cable-ready TV OpenCable Application Platform Advanced Common Application Platform Encryption Must-carry

Subscription TV	AllVid CableCARD Downloadable Conditional Access System Tru2way

Satellite TV

IPTV

Technical issues

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