List of ATSC standards


Below are the published ATSC standards for ATSC digital television service, issued by the Advanced Television Systems Committee.
In 2004, the main ATSC standard was 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.
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

is a non-backwards-compatible version of ATSC being developed that uses OFDM instead of 8VSB and a much newer video codec. 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 was upgraded from candidate standard to finalized standard.
On May 4, 2016, the Audio Codec component of ATSC 3.0 was elevated to candidate standard, with two finalists remaining: Dolby AC-4 and MPEG-H Audio Alliance format from Fraunhofer IIS, Qualcomm and Technicolor SA. A third entry from DTS named was withdrawn before the standard was upgraded to candidate status.
On September 8, 2016, the Physical Layer Download component of ATSC 3.0 was upgraded from candidate standard to finalized standard.
On October 5, 2016, the Link Layer Protocol Standard was elevated from Candidate to final standard, along with the Audio Watermark Emission Standard and Video Watermark Emission Standard. ATSC Technology Group 3 members have also begun voting on elevating the following Candidate Standards to Proposed Standard status : Service Announcement, Service Usage Reporting and Captions and Subtitles. TG3 members also are voting to elevate Security to Candidate Standard status, joining Schedule and Studio-to-Transmitter Link Standard, which was recently elevated. On March 30, 2016, A/324 was upgraded from Proposed to Candidate Standard.
On January 3, 2017, ATSC announced the updated status of its standards, in time for its debut at the Consumer Electronics Show in Las Vegas. As a result, this update, Captions and Subtitles was upgraded from Candidate to Finalized Standard; Security, Lab Performance Test Plan and Field Test Plan were upgraded to Candidate Standard from "Under Consideration".
By March 7, 2017, ATSC announced a further update to the status of its standards, with the following as Finalized: A/321 ; A/322 Physical Layer Protocl ; A/326 ; A/330 ; A/333 ; A/334 ; A/335 ; A/336 ; A/342 Part 1 ; A/342 Part 2 ; A/342 Part 3 ; and A/343. The following are Proposed Standards: A/325 ; A/332 ; A/338 ; A/341. The following are Candidate Standards: A/300 ; A/324 ; A/331 ; A/337 ; A/344 ; A/360. The following is a Draft Standard: A/323.
;Structure/ATSC 3.0 System Layers
  1. Bootstrap: System Discovery and Signalling
  2. Physical Layer: Transmission
  3. Link Layer Protocols: IP, MMT
  4. Presentation: Audio and Video standards, Ultra HD with High Definition and standard definition multicast, Immersive Audio
  5. Applications: Screen is a web page
;Finalized Standards:
;Proposed Standards:
;Candidate Standards:
;Draft Standards:
;Under Consideration - Working Drafts and Recommended Practices: