Overview
ISO/IEC 23008-8:2018 specifies conformance tests and procedures for HEVC (H.265) implementations. It defines how to verify whether encoder bitstreams and decoder implementations meet the normative requirements of Rec. ITU‑T H.265 | ISO/IEC 23008‑2. The document uses a set of published conformance bitstreams and the reference software decoder (Rec. ITU‑T H.265.2 | ISO/IEC 23008‑5) to exercise and validate compliance. Conformance materials (bitstreams, decoded outputs/hashes, trace files and descriptions) are available at http://standards.iso.org/iso-iec/23008/-8/ed-2/en.
Key Topics
- Bitstream conformance: Procedures to verify that a bitstream conforms to the HEVC syntax and constraints by parsing and/or decoding with the reference decoder.
- Decoder conformance: Tests to confirm decoders meet output correctness, output order conformance, and output timing conformance as defined in H.265.
- Reference software use: Requirement to use the H.265 reference decoder/encoder for many tests and to generate reference decoded pictures or hashes when not supplied.
- Test suites and bitstream taxonomy: Normative test suites and a wide range of conformance bitstreams covering:
- block structure, intra and inter coding
- transform and quantization
- deblocking filter and sample-adaptive offset (SAO)
- entropy coding
- temporal scalability and scalable extensions
- parallel-processing tools
- high-level syntax and format range/bit-depth extensions (10-bit, MV‑HEVC, 3D‑HEVC, etc.)
- Complementary testing: Guidance that additional verifiers may be necessary for HRD (Hypothetical Reference Decoder) and other annex tests not fully covered by the reference decoder.
- Conformance package contents: Each bitstream package can include the bitstream, decoded pictures or hashes, a short description and a trace file.
Applications
- Product compliance validation: Manufacturers of HEVC encoders and decoders use ISO/IEC 23008-8 to certify that their products conform to H.265 profiles, tiers and levels.
- Interoperability testing: Broadcasters, streaming platforms, and silicon vendors rely on the conformance suites to ensure playback compatibility across devices.
- Test and QA automation: QA teams integrate the conformance bitstreams and reference decoder into automated validation pipelines for firmware/software releases.
- Standards labs and certification bodies: Use the documented procedures and normative test suites to produce objective conformance reports.
Who should use this standard
- Codec implementers (encoder/decoder developers)
- QA engineers and test labs
- System integrators, device manufacturers, OTT and broadcast engineers
- Conformance and certification bodies
Related standards
- Rec. ITU‑T H.265 | ISO/IEC 23008‑2 - HEVC specification (normative reference)
- Rec. ITU‑T H.265.2 | ISO/IEC 23008‑5 - HEVC reference software (encoder/decoder)
Open preview (PDF)Information technology — High efficiency coding and media delivery in heterogeneous environments — Part 8: Conformance specification for HEVC