Sustainability of Digital Formats
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Introduction | Sustainability Factors | Content Categories | Format Descriptions | Contact |
Full name | Information technology -- Generic coding of moving pictures and associated audio information (formal name) MPEG-2, Main Profile |
Description | Permits the use of Intra-coded (I) frames, predicted (P) frames, and bidirectionally predicted (B) frames. Conformance points for this bitstream exist at the following levels: Low, Main, High-1440, and High. At the Main Level, the broadcast-stream picture size is 720x576 pixels (non-square pixels), with color sampling of 4:2:0 and a maximum data rate of 15 Mb/s. |
Production phase | Generally a final-state (end-user delivery) format; may be used as a middle-state (broadcast production) format. |
Relationship to other formats | |
Subtype of | MPEG-2 |
LC experience or existing holdings | See MPEG-2 |
LC preference | For file-based compressed video, conform to or approximate MPEG-2_422 (4:2:2 Profile) at Main Level (aka MPEG-2 422@ML) or MPEG-2_MP (this document; Main Profile) at Main Level (aka MPEG-2 MP@ML). Uncompressed or losslessly compressed copies are preferred to compressed (for future development). |
Disclosure | Open standard. See MPEG-2 |
Documentation | See MPEG-2 |
Adoption | MPEG-2_MP (Main Profile) is used by broadcasters and cablecasters, who may also use MPEG-2_422 (4:2:2 Profile). Vanderbilt University is using MPEG-2_MP (Main Profile) as the "target" for its digitization of news broadcasts. |
Licensing and patent claims | See MPEG-2. |
Transparency | See MPEG-2. |
Self-documentation | See MPEG-2. |
External dependencies | See MPEG-2. |
Technical protection considerations | See MPEG-2. |
Normal rendering | Good support. |
Clarity (support for high image resolution) | See MPEG-2. At a given picture size, data rate, and encoding algorithm, MPEG-2_MP (Main Profile) will produce greater clarity than MPEG-2_SP (Simple Profile) but less than MPEG-2_422 (4:2:2 Profile). |
Fidelity (support for high audio resolution) | See MPEG-2. |
Support for multiple sound channels | See MPEG-2. |
Functionality beyond normal video rendering | See MPEG-2. |
Tag type | Value | Note |
Filename Extension | mpg, mpeg | There is no explicit MPEG-2 file format; MPEG-2 content "ready to be delivered" is exchanged in files with these extensions. |
Internet Media Type | See MPEG-2 | |
Magic numbers | See MPEG-2 |
General | |
History |
URLs
Print
See MPEG-2.
URLs
• See MPEG-2.
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