ATSC A/53 --Digital Television Standard
The ATSC A/53 standard describes how to transmit, using 8- and 16-VSB modulation, terrestrial and cable broadcasts. Like other MPEG "users" like DVB, ARIB and SCTE, ATSC A/53 builds upon the transport streams established in the MPEG-2 specification.
Broadcast Metadata provisions
The Digital Television standard has many sections which define and control metadata elements and aspects. While the MPEG-2 standard defines Program Association Table (PAT) and Program Map table (PMT) sections, the document is silent as to the transmission rate of these tables.
ATSC A/53 sets the repetition rates to be at least once per 100 ms for the PAT, and at least once every 400 ms per PMT section.
ATSC A/53 editions
| Code | Date | Comment |
| A/52D.1 | 20050727 | Current edition |
| A/52D | 20050719 | |
| A/52C.2 | 20050323 | |
| A/53C | 20040713 | |
| A/53B | 20030519 | |
See: ATSC Standards
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