Sustainability of Digital Formats
 Planning for Library of Congress Collections

Format Description Categories >> Browse Alphabetical List>> Back

Identification and description

Full name	MPEG-2 File with 422 Video and Layer II Audio Encoding
Description	File containing an MPEG-2 program stream consisting of 422 Profile MPEG-2 encoded video multiplexed with MPEG-1 and MPEG-2 Layer II encoded audio. The program stream may also be delivered via a serial interface.
Production phase	Generally a final-state (end-user delivery) format.
Relationship to other formats
Contains	MPEG-2_422, MPEG-2, 4:2:2 Profile
Contains	MPEG_layer_2_audio, MPEG-1 and MPEG-2 Layer II Audio Encoding

Local use

LC experience or existing holdings	See MPEG-2_family
LC preference	See MPEG-2_family

Sustainability factors

Disclosure	Open standard. See MPEG-2_family
Documentation	See MPEG-2_family
Adoption	The authors are still investigating adoption of this combination of video and audio encodings. Comments welcome
Licensing and patents	See MPEG-2_family
Transparency	See MPEG-2_family
Self-documentation	See MPEG-2_family
External dependencies	See MPEG-2_family
Technical protection considerations	See MPEG-2_family

Quality and functionality factors

Moving Image
Normal rendering	See MPEG-2_422
Clarity (high image resolution)	See MPEG-2_422
Functionality beyond normal rendering	See MPEG-2_422
Sound
Normal rendering	See MPEG_layer_2_audio
Fidelity (high audio resolution)	See MPEG_layer_2_audio
Multiple channels	See MPEG_layer_2_audio
Functionality beyond normal rendering	See MPEG_layer_2_audio

File type signifiers

Tag	Value	Note

Notes

General
History

Format specifications

• ISO/IEC 13818-2:2000. Information technology -- Generic coding of moving pictures and associated audio information: Video.
• SMPTE 308M-1998. SMPTE Standard for Television -- MPEG-2 4:2:2 Profile at High Level.
• ISO/IEC 11172-3:1993 Coding of moving pictures and associated audio for digital storage media at up to about 1,5 Mbit/s -- Part 3: Audio
• ISO/IEC 13818-3:1998 Generic coding of moving pictures and associated audio information -- Part 3: Audio
• See also MPEG-2.
• See also MPEG_layer_2_audio.

Useful references