Overview
ISO/IEC 23094-2:2021/Amd 1:2024 is an important amendment to the international standard for general video coding, focusing on low complexity enhancement video coding. Published by ISO in 2024, this update introduces additional levels to the existing Part 2 framework, enhancing the standard's scalability and applicability to a wider range of video coding scenarios. The amendment refines syntax, coding processes, and level limits to improve video compression efficiency while maintaining low complexity for practical deployment.
Key Topics
-
Additional Levels for Video Coding
This amendment expands the level limits within the Low Complexity Enhancement Video Coding (LCEVC) standard, enabling support for higher resolutions, frame rates, and tile numbers. This accommodates emerging video formats including ultra-high resolutions like 8K and beyond.
-
Syntax and Bitstream Processing Updates
Updated tables and syntax descriptors for processes such as byte alignment, process payload surface handling, and prefix coding decoder streams ensure more precise and optimized interpretation of video bitstreams. Changes promote better handling of entropy coding, tile sizes, and temporal signaling.
-
Enhanced Transform and Tile Processing
Modifications to transform unit sizes and tile width/height constraints reduce the risk of incomplete transform units, ensuring bitstream integrity and efficient decoding. This supports greater flexibility for different chroma sampling types and planes.
-
Refined Upscaling and Residual Coding
The document adjusts formulas and algorithms for upscaling video samples and residual prediction, optimizing visual quality and consistency in enhanced video layers.
-
Updated Level Limits for Maximum Bitrate and Resolutions
Added levels feature significantly higher max bitrates and resolutions, including:
- Up to 15360 x 8640 resolution at high frame rates (e.g., 60-240 fps).
- Increased maximum coded picture block length (CPBL) bit rates, supporting next-generation ultra-high-definition content.
- Extended maximum number of tiles per picture to cater to advanced video tiling strategies for parallel decoding.
Applications
The upgraded ISO/IEC 23094-2:2021/Amd 1:2024 standard is vital for industries requiring efficient video compression with low complexity-such as:
-
Broadcast and Streaming Media
Supports delivery of high-resolution video content (4K, 8K, and beyond) with enhanced compression efficiency, enabling smoother streaming even over constrained bandwidth networks.
-
Video Conferencing and Real-Time Communication
Low complexity enhancements allow for reduced processing demands on communication devices while maintaining high video quality.
-
Surveillance and Security Systems
Enables high frame rate video capture and streaming with scalable decoding levels suitable for resource-limited edge devices.
-
Augmented Reality (AR) and Virtual Reality (VR)
Supports ultra-high-resolution and high-frame-rate video streams critical for immersive experiences.
-
Content Creation and Post-Production
Facilitates high-quality video processing workflows with standardized, interoperable enhancement layers.
Related Standards
-
ISO/IEC 23091-2 (ITU-T H.273)
referenced as the normative basis for video enhancement coding and integration within LCEVC frameworks.
-
ISO/IEC Directives Part 1 & Part 2
govern the editorial and procedural rules applied in preparing this amendment.
-
Other ISO/IEC 23094 Series Parts
complete the general video coding system scope, addressing base video coding, metadata, and related enhancements.
By incorporating additional levels and refining coding techniques, ISO/IEC 23094-2:2021/Amd 1:2024 advances the capabilities of low complexity video enhancement coding, ensuring it stays relevant and effective for evolving video delivery and processing demands worldwide. This amendment supports scalable, high-performance video compression optimized for modern multimedia applications.
Open preview (PDF)Information technology – General video coding — Part 2: Low complexity enhancement video coding — Amendment 1: Additional levels
