{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WMYOSBN6AVCRJ7DIRVCUXIKCR2","short_pith_number":"pith:WMYOSBN6","canonical_record":{"source":{"id":"1811.00078","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-10-31T19:30:39Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"3090bb0eca27991f90460ad534b36a9508c00300c190f7df6c1e2afcabee038c","abstract_canon_sha256":"68c94847cc87c9906262a9f11fd57c37621c6542c079c56187b6de07a61b6a4d"},"schema_version":"1.0"},"canonical_sha256":"b330e905be054514fc688d454ba1428eab43fa243bc3abdf79357123db3fa464","source":{"kind":"arxiv","id":"1811.00078","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.00078","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"arxiv_version","alias_value":"1811.00078v1","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.00078","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"pith_short_12","alias_value":"WMYOSBN6AVCR","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WMYOSBN6AVCRJ7DI","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WMYOSBN6","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WMYOSBN6AVCRJ7DIRVCUXIKCR2","target":"record","payload":{"canonical_record":{"source":{"id":"1811.00078","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-10-31T19:30:39Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"3090bb0eca27991f90460ad534b36a9508c00300c190f7df6c1e2afcabee038c","abstract_canon_sha256":"68c94847cc87c9906262a9f11fd57c37621c6542c079c56187b6de07a61b6a4d"},"schema_version":"1.0"},"canonical_sha256":"b330e905be054514fc688d454ba1428eab43fa243bc3abdf79357123db3fa464","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:01:48.306919Z","signature_b64":"PG81doxibmf8qwIHrfRblIMjN7BQxK36S8IfNALaPU0k1vZfb+ahvAn2sKVy2AsG8nzRI3ykb4Zh6h7ooekTDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b330e905be054514fc688d454ba1428eab43fa243bc3abdf79357123db3fa464","last_reissued_at":"2026-05-18T00:01:48.306343Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:01:48.306343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.00078","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":"2026-05-18T00:01:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zs9J8Tw/GmWrutiP5lOz4/udDeQO417jObRQv1U0ZIGQ7VuJxs3NOVcibWh/n9Kbx9kazs7OW7dzRJugmvZqBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T15:49:59.339196Z"},"content_sha256":"d952174f68e8c14634cd972fbba758fb20a7b5deed72b73a5c76f9b0f31ecdd9","schema_version":"1.0","event_id":"sha256:d952174f68e8c14634cd972fbba758fb20a7b5deed72b73a5c76f9b0f31ecdd9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WMYOSBN6AVCRJ7DIRVCUXIKCR2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On Single-Channel Speech Enhancement and On Non-Linear Modulation-Domain Kalman Filtering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.AS"],"primary_cat":"cs.SD","authors_text":"Nikolaos Dionelis","submitted_at":"2018-10-31T19:30:39Z","abstract_excerpt":"This report focuses on algorithms that perform single-channel speech enhancement. The author of this report uses modulation-domain Kalman filtering algorithms for speech enhancement, i.e. noise suppression and dereverberation, in [1], [2], [3], [4] and [5]. Modulation-domain Kalman filtering can be applied for both noise and late reverberation suppression and in [2], [1], [3] and [4], various model-based speech enhancement algorithms that perform modulation-domain Kalman filtering are designed, implemented and tested. The model-based enhancement algorithm in [2] estimates and tracks the speech"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.00078","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":"2026-05-18T00:01:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pd4uQo8lW+1YJvpg72wlIc3dj2YuA5yCQlmaT8+u+nLtyRPLU72OjJOnzYQnCnjHohIwMSZu5zZ3HhRZPbhDDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T15:49:59.339568Z"},"content_sha256":"74d236ea74db3d20e7b67a439079963075f5c9b10613b4e14e51f72b2f7ae254","schema_version":"1.0","event_id":"sha256:74d236ea74db3d20e7b67a439079963075f5c9b10613b4e14e51f72b2f7ae254"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/bundle.json","state_url":"https://pith.science/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/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":"2026-06-20T15:49:59Z","links":{"resolver":"https://pith.science/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2","bundle":"https://pith.science/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/bundle.json","state":"https://pith.science/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WMYOSBN6AVCRJ7DIRVCUXIKCR2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WMYOSBN6AVCRJ7DIRVCUXIKCR2","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":"68c94847cc87c9906262a9f11fd57c37621c6542c079c56187b6de07a61b6a4d","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-10-31T19:30:39Z","title_canon_sha256":"3090bb0eca27991f90460ad534b36a9508c00300c190f7df6c1e2afcabee038c"},"schema_version":"1.0","source":{"id":"1811.00078","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.00078","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"arxiv_version","alias_value":"1811.00078v1","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.00078","created_at":"2026-05-18T00:01:48Z"},{"alias_kind":"pith_short_12","alias_value":"WMYOSBN6AVCR","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WMYOSBN6AVCRJ7DI","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WMYOSBN6","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:74d236ea74db3d20e7b67a439079963075f5c9b10613b4e14e51f72b2f7ae254","target":"graph","created_at":"2026-05-18T00:01:48Z","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":"This report focuses on algorithms that perform single-channel speech enhancement. The author of this report uses modulation-domain Kalman filtering algorithms for speech enhancement, i.e. noise suppression and dereverberation, in [1], [2], [3], [4] and [5]. Modulation-domain Kalman filtering can be applied for both noise and late reverberation suppression and in [2], [1], [3] and [4], various model-based speech enhancement algorithms that perform modulation-domain Kalman filtering are designed, implemented and tested. The model-based enhancement algorithm in [2] estimates and tracks the speech","authors_text":"Nikolaos Dionelis","cross_cats":["eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-10-31T19:30:39Z","title":"On Single-Channel Speech Enhancement and On Non-Linear Modulation-Domain Kalman Filtering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.00078","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:d952174f68e8c14634cd972fbba758fb20a7b5deed72b73a5c76f9b0f31ecdd9","target":"record","created_at":"2026-05-18T00:01:48Z","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":"68c94847cc87c9906262a9f11fd57c37621c6542c079c56187b6de07a61b6a4d","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-10-31T19:30:39Z","title_canon_sha256":"3090bb0eca27991f90460ad534b36a9508c00300c190f7df6c1e2afcabee038c"},"schema_version":"1.0","source":{"id":"1811.00078","kind":"arxiv","version":1}},"canonical_sha256":"b330e905be054514fc688d454ba1428eab43fa243bc3abdf79357123db3fa464","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b330e905be054514fc688d454ba1428eab43fa243bc3abdf79357123db3fa464","first_computed_at":"2026-05-18T00:01:48.306343Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:01:48.306343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PG81doxibmf8qwIHrfRblIMjN7BQxK36S8IfNALaPU0k1vZfb+ahvAn2sKVy2AsG8nzRI3ykb4Zh6h7ooekTDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:01:48.306919Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.00078","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d952174f68e8c14634cd972fbba758fb20a7b5deed72b73a5c76f9b0f31ecdd9","sha256:74d236ea74db3d20e7b67a439079963075f5c9b10613b4e14e51f72b2f7ae254"],"state_sha256":"56002d28428653ae96800017506cff1a59e30aa98f6252fb9385b71cdc98e5b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sZn/fzboJDEyxGVsy02WEVCmXaQQ1GqiUNpAFXJYHgWXn1MfLwIpR0bAjyNN9GiLP7Mlt/ccNeBpzg0mz46GDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T15:49:59.341491Z","bundle_sha256":"0ca8a3aa04b63fd0e3c301a30c70b502aa0ec63ca7d2ae885fb42b9abc916d7d"}}