{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:ZJSFZJ2C2THESCOF5VICYUT2R3","short_pith_number":"pith:ZJSFZJ2C","canonical_record":{"source":{"id":"1603.03129","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-03-10T02:40:05Z","cross_cats_sorted":[],"title_canon_sha256":"2644fbc5ea1ee8f2cadf4521aadf6da9d7f6437931c9c53f56749f1b0ba5db1f","abstract_canon_sha256":"d63b3c18d983b5c842ed4f1ed0497508fd506472cf0ee0575c85cf43e5551782"},"schema_version":"1.0"},"canonical_sha256":"ca645ca742d4ce4909c5ed502c527a8ef0ea6b07d942933e4f11d91d22d28edc","source":{"kind":"arxiv","id":"1603.03129","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.03129","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"arxiv_version","alias_value":"1603.03129v1","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.03129","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"pith_short_12","alias_value":"ZJSFZJ2C2THE","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZJSFZJ2C2THESCOF","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZJSFZJ2C","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:ZJSFZJ2C2THESCOF5VICYUT2R3","target":"record","payload":{"canonical_record":{"source":{"id":"1603.03129","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-03-10T02:40:05Z","cross_cats_sorted":[],"title_canon_sha256":"2644fbc5ea1ee8f2cadf4521aadf6da9d7f6437931c9c53f56749f1b0ba5db1f","abstract_canon_sha256":"d63b3c18d983b5c842ed4f1ed0497508fd506472cf0ee0575c85cf43e5551782"},"schema_version":"1.0"},"canonical_sha256":"ca645ca742d4ce4909c5ed502c527a8ef0ea6b07d942933e4f11d91d22d28edc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:16.926239Z","signature_b64":"wFHw33ilCFOtiHRsWAl9vdTBA41ieRSRveleIILpZ02zOnsSLMwhepNC7mOicrMH2HWsJHl1qkuj1XFrTfHfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ca645ca742d4ce4909c5ed502c527a8ef0ea6b07d942933e4f11d91d22d28edc","last_reissued_at":"2026-05-18T01:19:16.925781Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:16.925781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.03129","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:19:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Hlz5Oa1LTrbxM66A/yTHlfLZN3ZdqmqpWUwz038frvSMOvvimLsMNvaUntrtDacapBTwoIiV5ASb0l0EIWT8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:34:30.717555Z"},"content_sha256":"29522ecf2c91199c75af8752052e0c8aec61475d068ffc1b1d285c0d047b8e0b","schema_version":"1.0","event_id":"sha256:29522ecf2c91199c75af8752052e0c8aec61475d068ffc1b1d285c0d047b8e0b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:ZJSFZJ2C2THESCOF5VICYUT2R3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Daala: A Perceptually-Driven Next Generation Video Codec","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cs.MM","authors_text":"Guillaume Martres, Jean-Marc Valin, Nathan E. Egge, Thomas J. Daede, Timothy B. Terriberry","submitted_at":"2016-03-10T02:40:05Z","abstract_excerpt":"The Daala project is a royalty-free video codec that attempts to compete with the best patent-encumbered codecs. Part of our strategy is to replace core tools of traditional video codecs with alternative approaches, many of them designed to take perceptual aspects into account, rather than optimizing for simple metrics like PSNR. This paper documents some of our experiences with these tools, which ones worked and which did not, and what we've learned from them. The result is a codec which compares favorably with HEVC on still images, and is on a path to do so for video as well."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.03129","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:19:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ob+nVwZyQzWvjH8ftii7Qh1ZQJ/Nh+Pf5fYCllO3I12PykCwCswOU3wIkFIRJD5gSDWcc3nbCDKRs9oG6aVBBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:34:30.717905Z"},"content_sha256":"2227f2aae7dc23b99d57491e2eac52fa432000145738d17070a32b476f9a9e75","schema_version":"1.0","event_id":"sha256:2227f2aae7dc23b99d57491e2eac52fa432000145738d17070a32b476f9a9e75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/bundle.json","state_url":"https://pith.science/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T08:34:30Z","links":{"resolver":"https://pith.science/pith/ZJSFZJ2C2THESCOF5VICYUT2R3","bundle":"https://pith.science/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/bundle.json","state":"https://pith.science/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZJSFZJ2C2THESCOF5VICYUT2R3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:ZJSFZJ2C2THESCOF5VICYUT2R3","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":"d63b3c18d983b5c842ed4f1ed0497508fd506472cf0ee0575c85cf43e5551782","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-03-10T02:40:05Z","title_canon_sha256":"2644fbc5ea1ee8f2cadf4521aadf6da9d7f6437931c9c53f56749f1b0ba5db1f"},"schema_version":"1.0","source":{"id":"1603.03129","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.03129","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"arxiv_version","alias_value":"1603.03129v1","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.03129","created_at":"2026-05-18T01:19:16Z"},{"alias_kind":"pith_short_12","alias_value":"ZJSFZJ2C2THE","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"ZJSFZJ2C2THESCOF","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"ZJSFZJ2C","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:2227f2aae7dc23b99d57491e2eac52fa432000145738d17070a32b476f9a9e75","target":"graph","created_at":"2026-05-18T01:19:16Z","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"},"paper":{"abstract_excerpt":"The Daala project is a royalty-free video codec that attempts to compete with the best patent-encumbered codecs. Part of our strategy is to replace core tools of traditional video codecs with alternative approaches, many of them designed to take perceptual aspects into account, rather than optimizing for simple metrics like PSNR. This paper documents some of our experiences with these tools, which ones worked and which did not, and what we've learned from them. The result is a codec which compares favorably with HEVC on still images, and is on a path to do so for video as well.","authors_text":"Guillaume Martres, Jean-Marc Valin, Nathan E. Egge, Thomas J. Daede, Timothy B. Terriberry","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-03-10T02:40:05Z","title":"Daala: A Perceptually-Driven Next Generation Video Codec"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.03129","kind":"arxiv","version":1},"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":"sha256:29522ecf2c91199c75af8752052e0c8aec61475d068ffc1b1d285c0d047b8e0b","target":"record","created_at":"2026-05-18T01:19:16Z","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":"d63b3c18d983b5c842ed4f1ed0497508fd506472cf0ee0575c85cf43e5551782","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-03-10T02:40:05Z","title_canon_sha256":"2644fbc5ea1ee8f2cadf4521aadf6da9d7f6437931c9c53f56749f1b0ba5db1f"},"schema_version":"1.0","source":{"id":"1603.03129","kind":"arxiv","version":1}},"canonical_sha256":"ca645ca742d4ce4909c5ed502c527a8ef0ea6b07d942933e4f11d91d22d28edc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ca645ca742d4ce4909c5ed502c527a8ef0ea6b07d942933e4f11d91d22d28edc","first_computed_at":"2026-05-18T01:19:16.925781Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:16.925781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"wFHw33ilCFOtiHRsWAl9vdTBA41ieRSRveleIILpZ02zOnsSLMwhepNC7mOicrMH2HWsJHl1qkuj1XFrTfHfDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:16.926239Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.03129","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29522ecf2c91199c75af8752052e0c8aec61475d068ffc1b1d285c0d047b8e0b","sha256:2227f2aae7dc23b99d57491e2eac52fa432000145738d17070a32b476f9a9e75"],"state_sha256":"113e85d700c1c670cc5847b21477df13acb397ea253f82167a957ef67670da82"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"87lJ/u4wPIaxaDiAyFQTVd3yamgeSu2TDy/XrJ6Dwk8sumrihK4q/Y+FShfI2hBcTitDwpp+4OqTcHnVHDpkDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:34:30.719844Z","bundle_sha256":"1311d5e32aa78ac43a0f49d7e23e2b1603d3fafef34b5cd4a5ceff434d175d4f"}}