The H.264 Sequence Parameter Set

This is a follow-up to my World’s Smallest H.264 Encoder post. I’ve received several emails asking about precise details of things in two entities in the H.264 bitstream: the Sequence Parameter Set (SPS) and the Picture Parameter Set (PPS).

Link

• Visit resource

Related resources

• MPEG-5 Standards Overview (EVC & LCEVC)Overview of MPEG-5 Part 1 (EVC) and Part 2 (LCEVC) codec standards with links to specifications.
• W3C IMSC Test SuiteOfficial IMSC1 conformance test suite; several tests double as EBU-TT-D conformance tests.
• FOSDEM 2023: 4K HDR Video with AV1 — A Reality CheckFOSDEM Open Media devroom talk covering HDR encoder challenges and signal-conformance/evaluation testing strategies for AV1+HDR content.
• TTML Live Extensions ModuleW3C spec for live TTML/EBU-TT-Live subtitle streaming extensions, niche companion to IMSC.
• 608toVTT Conversion NoteW3C technical note on best practices for converting CEA-608/708 caption features into WebVTT.
• MPEG Basics (Chiariglione)Explanation of MPEG standardization process and organizational structure by MPEG founder Leonardo Chiariglione.
• Disney Dolby Vision Best Practices Guide v1.3.1Official Disney mastering spec detailing Dolby Vision L0/L1/L2/L5/L6/L8 metadata layers and trim requirements per content type.
• Video Coding Experts Group (VCEG)Overview of ITU-T's Video Coding Experts Group and its joint work with MPEG (JVET) developing codecs beyond VVC.
• Dolby Vision Overview (Technical PDF)Vendor-style technical overview of Dolby Vision mastering workflow covering PQ grading, CMU, and trim metadata.
• Getting to Know Dolby Vision HDR, Part 1Technical tutorial covering Dolby Vision terminology, CMU hardware, and PQ grading pipeline for colorists.
• HbbTV Reference ApplicationMIT-licensed reference DASH player with PlayReady/Marlin/ClearKey test material including cbcs streams, from the official HbbTV Association.
• Dolby.io Media APIs — Developer ToolsOfficial Dolby.io reference documentation for Media APIs developer tooling.
• Netflix Dolby Vision HDR Mastering GuidelinesOfficial Netflix delivery specification for Dolby Vision mastering, covering DV 4.0/2.9 profile requirements and IMF packaging.
• SMPTE ST 2110 — Professional Media over Managed IP NetworksOfficial SMPTE standard page for ST 2110, the professional media-over-IP suite (2025 Emmy-winning standard with EBU and VSF).
• AIMS Alliance (Alliance for IP Media Solutions)Industry alliance driving adoption of open IP standards (SMPTE ST 2110, NMOS) for professional media infrastructure interoperability.