single program transport stream (SPTS) [EtherGuide Glossary]
Transport streams can contain one or more than one program service.
A transport stream that offers just one program service is called a single program transport stream. If a transport stream offers more than one program service, it is a multiple program transport stream.
Program streams only offer a single program service. The table below gives the packet assigment details of a transport stream with a single program service. Pursuant to ATSC standards, a single program transport stream can have a maximum of one video stream, and essentially an unlimited number of audio streams.
typical ATSC SPTS program elements
|packet id||description||typical bps|
|0 / 0x0000||Program Association table (PAT)||15,000|
|48 / 0x0030||Program Map table (PMT)||4,000|
|49 / 0x0031||MPEG-2 Video, captions||4,500,000|
|52 / 0x0034||AC-3 Audio||400,000|
|6000 / 0x1770||EIT-0||10,000|
|6001 / 0x1771||EIT-1||5,000|
|6002 / 0x1772||EIT-2||2,500|
|6003 / 0x1773||EIT-3||1,250|
|8187 / 0x1FFB||PSIP_base_pid||15,040|
|8191 / 0x1FFF||null packets||150,400|
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