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MPEG-4, Advanced Video Coding, High 4:2:2 Profile

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Format Description Properties Explanation of format description terms

Identification and description Explanation of format description terms

Full name Information technology -- Coding of audio-visual objects (formal name); MPEG-4, Advanced Video Coding (part 10), High 4:2:2 Profile
Description

The High 4:2:2 Profile MPEG-4_AVC (from ITU-T H.264) supports 4:2:2 chroma at 10 bits per channel, adaptive macroblock-level switching between 8x8 and 4x4 transform block size, encoder-specified quantization scaling matrices, encoder-specified separate control of the quantization parameter for each chroma component, and monochrome sequences. The Overview and Introduction to the Fidelity Range Extensions states that "High 4:2:2 is expected to be used frequently in studio environments."

NOTE: this Web page drafted prior to the amendment of the standard to add the four High profiles.Comments welcome.

Production phase Generally a final-state (end-user delivery) format.
Relationship to other formats
    Subtype of MPEG-4_AVC, MPEG-4, Advanced Video Coding (Part 10) (H.264)
    Used by MP4_FF_2_AVC_H422P, MPEG-4 File Format, V.2, with AVC, High 4:2:2 Profile

Local use Explanation of format description terms

LC experience or existing holdings  
LC preference  

Sustainability factors Explanation of format description terms

Disclosure Open standard. See MPEG-4_AVC.
    Documentation See MPEG-4_AVC. This profile is not yet in the formal specification; information may be found in Overview and Introduction to the Fidelity Range Extensions.
Adoption See MPEG-4_AVC_HP and MPEG-4_AVC.
    Licensing and patents See MP4_FF_2.
Transparency See MP4_FF_2.
Self-documentation See MP4_FF_2.
External dependencies See MP4_FF_2.
Technical protection considerations See MP4_FF_2.

Quality and functionality factors Explanation of format description terms

Moving Image
Normal rendering Good support.
Clarity (high image resolution) See MPEG-4_AVC. Depends in part on the level and encoding algorithm selected. The High 4:2:2 Profile has the potential to produce greater clarity than MPEG-4_AVC_BP, MPEG-4_AVC_MP, MPEG-4_AVC_EP, MPEG-4_AVC_HP, and MPEG-4_AVC_H10P at a given picture size and data rate. By the same token, MPEG-4_AVC_H422P clarity can be surpassed by MPEG-4_AVC_H444P.
Functionality beyond normal rendering See MP4_FF_2.

File type signifiers and format identifiers Explanation of format description terms

Tag Value Note
Filename extension Not applicable.  Pertains to the file format; see MP4_FF_2
Internet Media Type Not applicable.  Pertains to the file format; see MP4_FF_2
Magic numbers Not applicable.  Pertains to the file format; see MP4_FF_2
File type brand (ISO Base Media File Format) See note.  Indicated in file wrapper and relates to "brands" defined in ISO_BMFF. Wrapping MPEG-4_AVC bitstreams in MP4_FF_1 (unlikely) would occasion the use of mp41; in MP4_FF_2 (more likely), use mp42.
Indicator for profile, level, version, etc. 122
profile_idc; described as a part of Annex A of Part 10 of the standard, pp. 204-05.

Notes Explanation of format description terms

General  
History  

Format specifications Explanation of format description terms


Useful references

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Books, articles, etc.

Last Updated: Wednesday, 22-Feb-2017 12:37:42 EST