Overview
ISO/IEC 14496-2:2004/Amd 2:2005 is an amendment to the international standard for information technology, specifically addressing the coding of audio-visual objects. Part 2 of this standard deals with visual coding, and Amendment 2 introduces new levels for the Simple Profile. Developed by the ISO/IEC Joint Technical Committee 1 (JTC 1), Subcommittee SC 29, this amendment expands the capabilities available to implementers of the MPEG-4 Visual Simple Profile by defining two new levels: Level 4a and Level 5.
This update is significant for organizations utilizing video compression and encoding technologies, as it provides enhanced support for higher video resolutions, wider ranges of bitrates, and greater flexibility in multimedia application development.
Key Topics
- New Profile Levels: Introduction of Level 4a and Level 5 to the Simple Profile for MPEG-4 Visual.
- Resolution Support: Enables typical visual session resolutions such as:
- 640x480 pixels (VGA resolution) - Level 4a
- 720x576 pixels (European SDTV resolution) - Level 5
- Increased Capabilities: Extended support for:
- Larger Video Object Plane (VOP) sizes
- Higher Video Coding Buffer (VCV) sizes and rates
- Enhanced bitrates for more demanding audio-visual applications
- Standard Harmonization: Updates to coding tables and parameter definitions to reflect the new capabilities while maintaining backward compatibility.
Applications
The addition of new levels to the Simple Profile in ISO/IEC 14496-2:2004/Amd 2:2005 brings several practical benefits to industries relying on digital video encoding:
- Multimedia Streaming: Enhanced support for higher video resolutions enables improved quality for streaming platforms handling VGA and SDTV content.
- Broadcasting and Content Delivery: Broadcasters and content distributors can efficiently encode and transmit higher resolution video within the established MPEG-4 framework.
- Embedded Systems: Consumer electronics such as set-top boxes, digital cameras, and portable media players benefit from advanced visual processing capabilities without requiring changes to existing hardware architectures.
- Video Conferencing: Greater flexibility in video session size and bit rate allows for improved quality and adaptability in video conferencing solutions.
These expanded features help developers and service providers meet evolving consumer expectations for higher-quality digital video while leveraging the widespread adoption and support of MPEG-4 standards.
Related Standards
For comprehensive implementation and best practices, consider these related standards:
- ISO/IEC 14496-1: Coding of audio-visual objects - Systems (defines the overall system architecture for MPEG-4)
- ISO/IEC 14496-3: Coding of audio-visual objects - Audio (addresses the audio component within MPEG-4)
- ISO/IEC 14496-10: Advanced Video Coding (AVC) - often referenced for high-efficiency video applications
- ISO/IEC 13818-2: Generic coding of moving pictures and associated audio information (MPEG-2 Video)
- ITU-T H.263: Video coding for low bitrate communication
By adhering to ISO/IEC 14496-2:2004/Amd 2:2005 and these related standards, organizations can ensure compatibility, performance, and future-proofing of their audio-visual technology solutions.
Open preview (PDF)Information technology — Coding of audio-visual objects — Part 2: Visual — Amendment 2: New Levels for Simple Profile