These fixtures come from the electronic attachment to [ITU-T H.265.1 (10/2018)](https://www.itu.int/rec/T-REC-H.265.1-201810-I/en), the conformance specification aligned with ISO/IEC 23008-8. Table 4 identifies the Sony `GENERAL_*_RExt` streams and their required profiles.
The `.bit` files are the original Annex B conformance streams. Each `_frame0.yuv` file contains the first decoded picture extracted byte-for-byte from the corresponding published planar reference output; it was not generated by ImageSharp.
The `.bit` files are the original Annex B conformance streams. The Samsung archives name their payloads `.bin`; the repository stores those unchanged bytes with the common `.bit` extension. Each `GENERAL_*_frame0.yuv` file contains the first decoded picture extracted byte-for-byte from the corresponding published planar reference output; it was not generated by ImageSharp.
`HevcPictureDecoderTests.DecodeOfficialRangeExtensionsPictureMatchesPublishedDigest` limits each stream to its first independently coded picture, adapts that picture to the bounded `hvc1` item contract, compares every reconstructed sample with `_frame0.yuv`, and verifies the published decoded-picture MD5 value for every present plane.
The retained matrix covers the ImageSharp 8, 10, and 12-bit still-image precision boundary across monochrome, 4:2:0, 4:2:2, and 4:4:4. Tool-specific H.265.1 streams remain necessary before every exposed Range Extensions tool can be marked complete.
The Main-profile traversal matrix comes from the official `RQT_A_HHI_4` through `RQT_E_HHI_4`, `STRUCT_A_Samsung_7`, `STRUCT_B_Samsung_7`, and `TUSIZE_A_Samsung_1` archives. Their published descriptions target residual-quadtree intra hierarchy depths zero through four, coding-tree and minimum-coding-unit structure, and a 64x64 coding-tree block with 32x32 minimum coding units and 16x16 minimum luma transforms, respectively.
`HevcPictureDecoderTests.DecodeOfficialTraversalPictureMatchesPinnedHmDigest` decodes each first independently coded picture through the production still-item path and compares all three native planes with fixed MD5 digests. The RQT values are the streams' decoded-picture-hash SEI values. For STRUCT and TUSIZE, the plane values were calculated from the first picture written by the [HM reference decoder at commit `9c1f298659ab0cee9dc13d23d0304221575410b9`](https://vcgit.hhi.fraunhofer.de/jvet/HM/-/commit/9c1f298659ab0cee9dc13d23d0304221575410b9); the complete HM output also matched each archive's published file MD5:
James Jackson-South
4 days ago