{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:B4MNP2T5IDKHQAEJBQ7FIK6P2Z","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":"e31ffd774a00b2dcd505d63945e4ef5245cac52e1a5c9b2840a9fa18a71fb291","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-02-15T21:30:54Z","title_canon_sha256":"380b912a3cc4e8b56eff7b565bc6e344bd12d89a0c9f1baeac8a5bd70b2fd417"},"schema_version":"1.0","source":{"id":"1602.04845","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.04845","created_at":"2026-05-18T01:20:28Z"},{"alias_kind":"arxiv_version","alias_value":"1602.04845v1","created_at":"2026-05-18T01:20:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.04845","created_at":"2026-05-18T01:20:28Z"},{"alias_kind":"pith_short_12","alias_value":"B4MNP2T5IDKH","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_16","alias_value":"B4MNP2T5IDKHQAEJ","created_at":"2026-05-18T12:30:07Z"},{"alias_kind":"pith_short_8","alias_value":"B4MNP2T5","created_at":"2026-05-18T12:30:07Z"}],"graph_snapshots":[{"event_id":"sha256:7ab73efda53137d03f18f860157bdb360749df15df18eb4e5352aa5870330d44","target":"graph","created_at":"2026-05-18T01:20:28Z","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 IETF recently standardized the Opus codec as RFC6716. Opus targets a wide range of real-time Internet applications by combining a linear prediction coder with a transform coder. We describe the transform coder, with particular attention to the psychoacoustic knowledge built into the format. The result out-performs existing audio codecs that do not operate under real-time constraints.","authors_text":"Gregory Maxwell, Jean-Marc Valin, Koen Vos, Timothy B. Terriberry","cross_cats":["cs.SD"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-02-15T21:30:54Z","title":"High-Quality, Low-Delay Music Coding in the Opus Codec"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.04845","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":"sha256:39ee8ee36352644ecb955ca249c1e7294947ceed06dc6ce34082d32cfffc1d28","target":"record","created_at":"2026-05-18T01:20:28Z","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":"e31ffd774a00b2dcd505d63945e4ef5245cac52e1a5c9b2840a9fa18a71fb291","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.MM","submitted_at":"2016-02-15T21:30:54Z","title_canon_sha256":"380b912a3cc4e8b56eff7b565bc6e344bd12d89a0c9f1baeac8a5bd70b2fd417"},"schema_version":"1.0","source":{"id":"1602.04845","kind":"arxiv","version":1}},"canonical_sha256":"0f18d7ea7d40d47800890c3e542bcfd66713c461025966d3dcd6e58e2ea0a167","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f18d7ea7d40d47800890c3e542bcfd66713c461025966d3dcd6e58e2ea0a167","first_computed_at":"2026-05-18T01:20:28.925487Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:28.925487Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KuMXETajarXLuECHqiioaUsIdGXIoYEjgfmHi52jYon3uyYSxSFYRFCikSkDOB5N28icIP6jRiZ5DSjgNg6HAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:28.926129Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.04845","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:39ee8ee36352644ecb955ca249c1e7294947ceed06dc6ce34082d32cfffc1d28","sha256:7ab73efda53137d03f18f860157bdb360749df15df18eb4e5352aa5870330d44"],"state_sha256":"7e58723b7f6a9651fd862669d0403b7b5a2ae288c007a80d94a04d9be90a8403"}