{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:P3NUTPD4XGTXSBOJGJCTZWY35I","short_pith_number":"pith:P3NUTPD4","canonical_record":{"source":{"id":"2505.21728","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-27T20:15:21Z","cross_cats_sorted":[],"title_canon_sha256":"25ac7e4dc38348a4d3cd940a4a2890c63dd14bdbcf76735cfcc7084a57f35607","abstract_canon_sha256":"2eff988929f084472ab83a30fb19525d5c7287b11e08750f8ad2458605fb0d66"},"schema_version":"1.0"},"canonical_sha256":"7edb49bc7cb9a77905c932453cdb1bea187fb3ea9262ba35a04167a2d0c4b878","source":{"kind":"arxiv","id":"2505.21728","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.21728","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"arxiv_version","alias_value":"2505.21728v1","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.21728","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_12","alias_value":"P3NUTPD4XGTX","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_16","alias_value":"P3NUTPD4XGTXSBOJ","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_8","alias_value":"P3NUTPD4","created_at":"2026-07-05T11:11:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:P3NUTPD4XGTXSBOJGJCTZWY35I","target":"record","payload":{"canonical_record":{"source":{"id":"2505.21728","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-27T20:15:21Z","cross_cats_sorted":[],"title_canon_sha256":"25ac7e4dc38348a4d3cd940a4a2890c63dd14bdbcf76735cfcc7084a57f35607","abstract_canon_sha256":"2eff988929f084472ab83a30fb19525d5c7287b11e08750f8ad2458605fb0d66"},"schema_version":"1.0"},"canonical_sha256":"7edb49bc7cb9a77905c932453cdb1bea187fb3ea9262ba35a04167a2d0c4b878","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:11:02.513180Z","signature_b64":"qRECASp0v1wcNmJEsJaWvA6jc3UzLCw7/Iux/AnuNNoeUDg1iS0KdwOpNuk2+BZKvrB4FO9UUxiHflhrhGGvDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7edb49bc7cb9a77905c932453cdb1bea187fb3ea9262ba35a04167a2d0c4b878","last_reissued_at":"2026-07-05T11:11:02.512713Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:11:02.512713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2505.21728","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":"2026-07-05T11:11:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Yv3MIOizIEsj8CuZa/+LJvllqiUKoWv1Y0c/ED8C1h0hOkMFwp7H+tPJNW9+mKkFC8AtaXiP/ojlNIV8DuVDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T11:49:55.011834Z"},"content_sha256":"b98e31c8f039df2815c098458133c48abf2b68ff0216b64b3b1b5241b49f7928","schema_version":"1.0","event_id":"sha256:b98e31c8f039df2815c098458133c48abf2b68ff0216b64b3b1b5241b49f7928"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:P3NUTPD4XGTXSBOJGJCTZWY35I","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Highly Efficient Non-Separable Transforms for Next Generation Video Coding","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Amir Said, Hilmi E. Egilmez, Jianle Chen, Marta Karczewicz, Vadim Seregin, Xin Zhao","submitted_at":"2025-05-27T20:15:21Z","abstract_excerpt":"For the last few decades, the application of signal-adaptive transform coding to video compression has been stymied by the large computational complexity of matrix-based solutions. In this paper, we propose a novel parametric approach to greatly reduce the complexity without degrading the compression performance. In our approach, instead of following the conventional technique of identifying full transform matrices that yield best compression efficiency, we look for the best transform parameters defining a new class of transforms, called HyGTs, which have low complexity implementations that ar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.21728","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2505.21728/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T11:11:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AAz7iCWGJKy3asaYQsLtFO9rrkc3wcqDFiDz8fP428ggXdTZQ/OeuesHcZuDwdPRnTNRuYSh06B3SPIInWcrBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-08T11:49:55.012446Z"},"content_sha256":"c5195669db6df0788abef33e941a33f6884f322001d97538e3d4b6f5e3005db7","schema_version":"1.0","event_id":"sha256:c5195669db6df0788abef33e941a33f6884f322001d97538e3d4b6f5e3005db7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/bundle.json","state_url":"https://pith.science/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/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":"2026-08-08T11:49:55Z","links":{"resolver":"https://pith.science/pith/P3NUTPD4XGTXSBOJGJCTZWY35I","bundle":"https://pith.science/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/bundle.json","state":"https://pith.science/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P3NUTPD4XGTXSBOJGJCTZWY35I/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:P3NUTPD4XGTXSBOJGJCTZWY35I","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":"2eff988929f084472ab83a30fb19525d5c7287b11e08750f8ad2458605fb0d66","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-27T20:15:21Z","title_canon_sha256":"25ac7e4dc38348a4d3cd940a4a2890c63dd14bdbcf76735cfcc7084a57f35607"},"schema_version":"1.0","source":{"id":"2505.21728","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2505.21728","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"arxiv_version","alias_value":"2505.21728v1","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2505.21728","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_12","alias_value":"P3NUTPD4XGTX","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_16","alias_value":"P3NUTPD4XGTXSBOJ","created_at":"2026-07-05T11:11:02Z"},{"alias_kind":"pith_short_8","alias_value":"P3NUTPD4","created_at":"2026-07-05T11:11:02Z"}],"graph_snapshots":[{"event_id":"sha256:c5195669db6df0788abef33e941a33f6884f322001d97538e3d4b6f5e3005db7","target":"graph","created_at":"2026-07-05T11:11:02Z","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/2505.21728/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"For the last few decades, the application of signal-adaptive transform coding to video compression has been stymied by the large computational complexity of matrix-based solutions. In this paper, we propose a novel parametric approach to greatly reduce the complexity without degrading the compression performance. In our approach, instead of following the conventional technique of identifying full transform matrices that yield best compression efficiency, we look for the best transform parameters defining a new class of transforms, called HyGTs, which have low complexity implementations that ar","authors_text":"Amir Said, Hilmi E. Egilmez, Jianle Chen, Marta Karczewicz, Vadim Seregin, Xin Zhao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-27T20:15:21Z","title":"Highly Efficient Non-Separable Transforms for Next Generation Video Coding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2505.21728","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:b98e31c8f039df2815c098458133c48abf2b68ff0216b64b3b1b5241b49f7928","target":"record","created_at":"2026-07-05T11:11:02Z","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":"2eff988929f084472ab83a30fb19525d5c7287b11e08750f8ad2458605fb0d66","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.IV","submitted_at":"2025-05-27T20:15:21Z","title_canon_sha256":"25ac7e4dc38348a4d3cd940a4a2890c63dd14bdbcf76735cfcc7084a57f35607"},"schema_version":"1.0","source":{"id":"2505.21728","kind":"arxiv","version":1}},"canonical_sha256":"7edb49bc7cb9a77905c932453cdb1bea187fb3ea9262ba35a04167a2d0c4b878","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7edb49bc7cb9a77905c932453cdb1bea187fb3ea9262ba35a04167a2d0c4b878","first_computed_at":"2026-07-05T11:11:02.512713Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:11:02.512713Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qRECASp0v1wcNmJEsJaWvA6jc3UzLCw7/Iux/AnuNNoeUDg1iS0KdwOpNuk2+BZKvrB4FO9UUxiHflhrhGGvDg==","signature_status":"signed_v1","signed_at":"2026-07-05T11:11:02.513180Z","signed_message":"canonical_sha256_bytes"},"source_id":"2505.21728","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b98e31c8f039df2815c098458133c48abf2b68ff0216b64b3b1b5241b49f7928","sha256:c5195669db6df0788abef33e941a33f6884f322001d97538e3d4b6f5e3005db7"],"state_sha256":"43d71cf84c0fc9bf8f6f4c4df8429bc1b7741868f080caf15db3e9bd4abc0f2d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r5NKYg/ky8x0If6kdgHs/Ro5Symg7/pN8mAAA3iggsJJbKCU2F14pAA9TbjR3EqESJcJ4JqCWMf266G1cQYJDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-08T11:49:55.017179Z","bundle_sha256":"5ba31ef650f7413fe9dc64914929fa3b63bb6f5974819548f267c0e1872f6a55"}}