docs/CHANGELOG.md

Changelog

v1.0 update - 2026-08

• Added the complete 9-bin event voxel representation.
• Normalized payload directories to data_5bin/ and data_9bin/.
• Preserved the canonical 3,263-video membership and 2,316/947 split for both variants.
• Added representation-specific metadata under metadata/5bin/ and metadata/9bin/.
• Generalized timing and format documentation for bin count B in {5, 9}.
• Verified 219 shards per representation and 438 total payload shards.

Canonical HDF5 payload sizes:

• 5-bin: 4,355,745,895,245 bytes;
• 9-bin: 4,214,122,096,103 bytes.

v1.0 - 2026-07-14

Initial public 5-bin release.

• Large: 3,263 videos and 106.941600381 hours.
• Medium: 1,537 videos and 50.000000128 hours.
• Small: 667 videos and 20.000000374 hours.
• 200 verified action classes.
• Large train/validation split: 2,316 / 947.
• HDF5 datasets: events, voxel_event_start, voxel_event_count.
• Canonical 5-bin HDF5 size: 4,355,745,895,245 bytes.
• Final integrity audit: PASS.

The initial small-file update added filtered ActivityNet Captions annotations, ActivityNet v1.3 actions, derived caption/action alignment, source timing metadata, and 219 tar-shard checksums.