Overview
SIST ISO/IEC 13818-2:2018 is the Slovenian adoption of ISO/IEC 13818-2:2013 - commonly known as MPEG‑2 Video (ITU‑T H.262). The standard specifies a coded representation of video data and the decoding process required to reconstruct pictures. It defines a generic video‑coding scheme that serves a wide range of applications, bit rates, picture resolutions and qualities, using a hybrid of motion‑compensated prediction and the Discrete Cosine Transform (DCT).
Key topics and technical requirements
- Core algorithm: Block‑based motion compensation combined with 8×8 DCT, quantization and variable‑length coding for compression efficiency.
- Picture types & temporal structure: I (intra), P (predictive) and B (bidirectional) pictures to balance random access and compression.
- Interlaced and progressive support: Encoding can be done by frame or field, selectable per picture to suit broadcast and film sources.
- Macroblock structure: 16×16 macroblocks as the basic motion‑compensation unit; motion vectors encoded differentially.
- Chroma formats: Support for 4:2:0, 4:2:2 and 4:4:4 chrominance sampling.
- Bitstream syntax & decoding: Defines syntax, semantics, and the full decoding pipeline - variable length decoding, inverse scan, inverse quantization, inverse DCT, and motion compensation.
- Profiles and levels: Subsets of the syntax constrained by Profile (features) and Level (parameter limits) for practical interoperability and implementation complexity.
- Scalability & extensions: Spatial, SNR (quality) and temporal scalability, data partitioning, hybrid scalability and stereoscopic frame packing (annexes cover specific tools).
- Conformance and test tools: Video buffering verifier, code tables, registration procedures and conformance testing guidance are included.
Practical applications and users
This standard underpins many legacy and current video services and devices, including:
- Broadcast and cable TV (DTT, satellite, cable head‑ends)
- Digital storage media (DVD, archival systems, serial/interactive storage)
- News gathering, surveillance, and video‑transport systems
- Professional encoders/decoders, SoC and chipset vendors
- Software developers, codec implementers and testing laboratories
- Network architects for streaming and content distribution
Engineers use ISO/IEC 13818-2 to ensure interoperable bitstreams, design compliant encoders/decoders, validate buffer and timing behavior, and select appropriate profiles and levels for target devices.
Related standards
- ISO/IEC 13818 (MPEG‑2) family: Part 1 (Systems), Part 3 (Audio), Part 4 (Conformance), etc.
- ISO/IEC 11172‑2 (MPEG‑1 Video) - compatibility considerations.
- ITU‑T Recommendation H.262 - identical text published by ITU‑T.
Keywords: MPEG‑2, ISO/IEC 13818‑2, H.262, video coding, motion compensation, DCT, interlaced video, profiles and levels, bitstream, decoder.
