{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:EEQK3ICYWYVKC5A67FGNUZJJGV","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"61394f34c0e3824e47c46ef0b905f83d1764ab7a1d2091de05d072fdbf86726b","cross_cats_sorted":["eess.IV","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2021-04-19T07:48:55Z","title_canon_sha256":"dc4bef0a6364db69892283eaf5439b12e4ca3f0eb8b743b8138ee322885e2cb6"},"schema_version":"1.0","source":{"id":"2104.09103","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2104.09103","created_at":"2026-07-05T02:33:34Z"},{"alias_kind":"arxiv_version","alias_value":"2104.09103v2","created_at":"2026-07-05T02:33:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2104.09103","created_at":"2026-07-05T02:33:34Z"},{"alias_kind":"pith_short_12","alias_value":"EEQK3ICYWYVK","created_at":"2026-07-05T02:33:34Z"},{"alias_kind":"pith_short_16","alias_value":"EEQK3ICYWYVKC5A6","created_at":"2026-07-05T02:33:34Z"},{"alias_kind":"pith_short_8","alias_value":"EEQK3ICY","created_at":"2026-07-05T02:33:34Z"}],"graph_snapshots":[{"event_id":"sha256:d0c192278c183b62d6fc800c4e998060d376a511b967132aab6a34dc6d2ba84a","target":"graph","created_at":"2026-07-05T02:33:34Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2104.09103/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper introduces a practical learned video codec. Conditional coding and quantization gain vectors are used to provide flexibility to a single encoder/decoder pair, which is able to compress video sequences at a variable bitrate. The flexibility is leveraged at test time by choosing the rate and GOP structure to optimize a rate-distortion cost. Using the CLIC21 video test conditions, the proposed approach shows performance on par with HEVC.","authors_text":"Lu Zhang (IETR), Olivier D\\'eforges (IETR), Pierrick Philippe, Th\\'eo Ladune (IETR), Wassim Hamidouche (IETR)","cross_cats":["eess.IV","eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2021-04-19T07:48:55Z","title":"Conditional Coding and Variable Bitrate for Practical Learned Video Coding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2104.09103","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:b4e908dee13eca7d6ff62f974d10fab2bb77ebf093fef692b60bbcc832677c61","target":"record","created_at":"2026-07-05T02:33:34Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"61394f34c0e3824e47c46ef0b905f83d1764ab7a1d2091de05d072fdbf86726b","cross_cats_sorted":["eess.IV","eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2021-04-19T07:48:55Z","title_canon_sha256":"dc4bef0a6364db69892283eaf5439b12e4ca3f0eb8b743b8138ee322885e2cb6"},"schema_version":"1.0","source":{"id":"2104.09103","kind":"arxiv","version":2}},"canonical_sha256":"2120ada058b62aa1741ef94cda652935689a3402c209c3867978da14c3977271","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2120ada058b62aa1741ef94cda652935689a3402c209c3867978da14c3977271","first_computed_at":"2026-07-05T02:33:34.327409Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:33:34.327409Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nv/lfs4bHXnmO+DnIlC+XHwEfd1vX3f+9jWeX+jgtp8SoRnI2ikvkYVpnL6oweaw9/NrGXyTueqXQseHpnmtAg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:33:34.327874Z","signed_message":"canonical_sha256_bytes"},"source_id":"2104.09103","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b4e908dee13eca7d6ff62f974d10fab2bb77ebf093fef692b60bbcc832677c61","sha256:d0c192278c183b62d6fc800c4e998060d376a511b967132aab6a34dc6d2ba84a"],"state_sha256":"26195ea685e98d6f6aec833841a0b63ea6f48b2f4fcf2099d0a8f099b0aa7db7"}