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.
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.
[7] As a result, this update, Captions and Subtitles (A/343) was upgraded from Candidate to Finalized Standard; Security (A-360), Lab Performance Test Plan (A-325) and Field Test Plan (A-326) 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 (System Discovery and Signaling); A/322 Physical Layer Protocl (COFDM); A/326 (Field Test Plan [Recommended Practice]); A/330 (Link Layer Protocol); A/333 (Service Usage Reporting); A/334 (Audio Watermark Emission); A/335 (Video Watermark Emission); A/336 (Content Recovery in Redistribution Scenarios [ATSC 3.0 over Cable and Satellite]); A/342 Part 1 (Audio Common Elements); A/342 Part 2 (Audio: Dolby AC-4 System); A/342 Part 3 (Audio MPEG-H System); and A/343 (Captions and Subtitles).
The following are Proposed Standards: A/325 (Lab Performance Test Plan [Recommended Practice]); A/332 (Service Announcement); A/338 (Companion Device); A/341 (Video - H.265/HEVC).