{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LGPAOB63MSKTCMVUNRKQTG7ZR4","short_pith_number":"pith:LGPAOB63","canonical_record":{"source":{"id":"1807.05365","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2018-07-14T09:29:57Z","cross_cats_sorted":[],"title_canon_sha256":"d8cfb72f032fe5318876124630a3a57239531ea6b147e357000a6606a3c7ea07","abstract_canon_sha256":"f46b2a34507b5c11ea33db97d859b8dbe6272ffb0416a613630048e23a015288"},"schema_version":"1.0"},"canonical_sha256":"599e0707db64953132b46c55099bf98f2d6e8f398788e999317633daf36f41c2","source":{"kind":"arxiv","id":"1807.05365","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05365","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05365v1","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05365","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"pith_short_12","alias_value":"LGPAOB63MSKT","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LGPAOB63MSKTCMVU","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LGPAOB63","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LGPAOB63MSKTCMVUNRKQTG7ZR4","target":"record","payload":{"canonical_record":{"source":{"id":"1807.05365","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2018-07-14T09:29:57Z","cross_cats_sorted":[],"title_canon_sha256":"d8cfb72f032fe5318876124630a3a57239531ea6b147e357000a6606a3c7ea07","abstract_canon_sha256":"f46b2a34507b5c11ea33db97d859b8dbe6272ffb0416a613630048e23a015288"},"schema_version":"1.0"},"canonical_sha256":"599e0707db64953132b46c55099bf98f2d6e8f398788e999317633daf36f41c2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:15.844625Z","signature_b64":"XfRsIp2rdVutZXKyAz6RauPAu1KkH0jf37IWPRBBplNQYDCqTPp57/yu2Cl7+SKVQejzZiOWwgiWToHcm97jCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"599e0707db64953132b46c55099bf98f2d6e8f398788e999317633daf36f41c2","last_reissued_at":"2026-05-18T00:03:15.843778Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:15.843778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.05365","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":"2026-05-18T00:03:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZINiPo3ihR7q8rusXLRmf6cSqmr6WPSCenVA/7CHl+8eRl3NFRP3dTqY4tuP9S0SEaMZbibaXx1GKUtYGP14AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:25:31.011986Z"},"content_sha256":"cda2ef4151bfe5d9db51f272aae59dff53f25cbd4bbacfac1161ac133f054b62","schema_version":"1.0","event_id":"sha256:cda2ef4151bfe5d9db51f272aae59dff53f25cbd4bbacfac1161ac133f054b62"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LGPAOB63MSKTCMVUNRKQTG7ZR4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fast Block Structure Determination in AV1-based Multiple Resolutions Video Encoding","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.MM","authors_text":"Bichuan Guo, Jiangtao Wen, Yuxing Han","submitted_at":"2018-07-14T09:29:57Z","abstract_excerpt":"The widely used adaptive HTTP streaming requires an efficient algorithm to encode the same video to different resolutions. In this paper, we propose a fast block structure determination algorithm based on the AV1 codec that accelerates high resolution encoding, which is the bottle-neck of multiple resolutions encoding. The block structure similarity across resolutions is modeled by the fineness of frame detail and scale of object motions, this enables us to accelerate high resolution encoding based on low resolution encoding results. The average depth of a block's co-located neighborhood is us"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05365","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":"2026-05-18T00:03:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HKp3WEZ9YnzFJ1zJAv70pAarCJLcomhCm5VxnFmHPqq78Sg3GRaxYW6fY1diOGbzkWqLr7/+0NKTpXJjE9T6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T15:25:31.012719Z"},"content_sha256":"d547cb11b2c3a2f5b8f3d1e85030a6a94e3a6dab34f395ee8d89a9af97ec2f1c","schema_version":"1.0","event_id":"sha256:d547cb11b2c3a2f5b8f3d1e85030a6a94e3a6dab34f395ee8d89a9af97ec2f1c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/bundle.json","state_url":"https://pith.science/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/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":"2026-06-06T15:25:31Z","links":{"resolver":"https://pith.science/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4","bundle":"https://pith.science/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/bundle.json","state":"https://pith.science/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LGPAOB63MSKTCMVUNRKQTG7ZR4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LGPAOB63MSKTCMVUNRKQTG7ZR4","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":"f46b2a34507b5c11ea33db97d859b8dbe6272ffb0416a613630048e23a015288","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2018-07-14T09:29:57Z","title_canon_sha256":"d8cfb72f032fe5318876124630a3a57239531ea6b147e357000a6606a3c7ea07"},"schema_version":"1.0","source":{"id":"1807.05365","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.05365","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"arxiv_version","alias_value":"1807.05365v1","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.05365","created_at":"2026-05-18T00:03:15Z"},{"alias_kind":"pith_short_12","alias_value":"LGPAOB63MSKT","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LGPAOB63MSKTCMVU","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LGPAOB63","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:d547cb11b2c3a2f5b8f3d1e85030a6a94e3a6dab34f395ee8d89a9af97ec2f1c","target":"graph","created_at":"2026-05-18T00:03:15Z","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 widely used adaptive HTTP streaming requires an efficient algorithm to encode the same video to different resolutions. In this paper, we propose a fast block structure determination algorithm based on the AV1 codec that accelerates high resolution encoding, which is the bottle-neck of multiple resolutions encoding. The block structure similarity across resolutions is modeled by the fineness of frame detail and scale of object motions, this enables us to accelerate high resolution encoding based on low resolution encoding results. The average depth of a block's co-located neighborhood is us","authors_text":"Bichuan Guo, Jiangtao Wen, Yuxing Han","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2018-07-14T09:29:57Z","title":"Fast Block Structure Determination in AV1-based Multiple Resolutions Video Encoding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.05365","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:cda2ef4151bfe5d9db51f272aae59dff53f25cbd4bbacfac1161ac133f054b62","target":"record","created_at":"2026-05-18T00:03:15Z","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":"f46b2a34507b5c11ea33db97d859b8dbe6272ffb0416a613630048e23a015288","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.MM","submitted_at":"2018-07-14T09:29:57Z","title_canon_sha256":"d8cfb72f032fe5318876124630a3a57239531ea6b147e357000a6606a3c7ea07"},"schema_version":"1.0","source":{"id":"1807.05365","kind":"arxiv","version":1}},"canonical_sha256":"599e0707db64953132b46c55099bf98f2d6e8f398788e999317633daf36f41c2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"599e0707db64953132b46c55099bf98f2d6e8f398788e999317633daf36f41c2","first_computed_at":"2026-05-18T00:03:15.843778Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:15.843778Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XfRsIp2rdVutZXKyAz6RauPAu1KkH0jf37IWPRBBplNQYDCqTPp57/yu2Cl7+SKVQejzZiOWwgiWToHcm97jCw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:15.844625Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.05365","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cda2ef4151bfe5d9db51f272aae59dff53f25cbd4bbacfac1161ac133f054b62","sha256:d547cb11b2c3a2f5b8f3d1e85030a6a94e3a6dab34f395ee8d89a9af97ec2f1c"],"state_sha256":"d21d22272aa79ce448a717c5351e0f471513107efd884c60bc35e66593e1bfe0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GSC/6bDkzTqlHsYseHmhh6iKAjgFvgmLKwNVqUIwpVPXdFVGjhYxzC/bzGKKkHc41HLJxor2GZ7urDAHPSyyDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T15:25:31.016213Z","bundle_sha256":"9d9527853698d66eccc74c06d47dc8b6172027822fe4a261a558980e96eac870"}}