{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:EI6XGCDJ6EGZ2MR43BWVXTZBR3","short_pith_number":"pith:EI6XGCDJ","canonical_record":{"source":{"id":"1707.02651","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2017-07-09T22:37:26Z","cross_cats_sorted":[],"title_canon_sha256":"b120a451c84373d5793aa60c1cb2b25bda5ba2659524d6d4fd956a74cf570a68","abstract_canon_sha256":"d5e31880d877c3761d121158d08769e8f6a9ed97da4337e2151be02f7892f405"},"schema_version":"1.0"},"canonical_sha256":"223d730869f10d9d323cd86d5bcf218ed79d7fa97f37c46ea91e4465bad1f314","source":{"kind":"arxiv","id":"1707.02651","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.02651","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"arxiv_version","alias_value":"1707.02651v3","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.02651","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"pith_short_12","alias_value":"EI6XGCDJ6EGZ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EI6XGCDJ6EGZ2MR4","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EI6XGCDJ","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:EI6XGCDJ6EGZ2MR43BWVXTZBR3","target":"record","payload":{"canonical_record":{"source":{"id":"1707.02651","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2017-07-09T22:37:26Z","cross_cats_sorted":[],"title_canon_sha256":"b120a451c84373d5793aa60c1cb2b25bda5ba2659524d6d4fd956a74cf570a68","abstract_canon_sha256":"d5e31880d877c3761d121158d08769e8f6a9ed97da4337e2151be02f7892f405"},"schema_version":"1.0"},"canonical_sha256":"223d730869f10d9d323cd86d5bcf218ed79d7fa97f37c46ea91e4465bad1f314","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:42.672382Z","signature_b64":"y3CuMVvYXb3ZA2+aqd0zmUfNXXSsZ+UBM98Ic+fZ1UP3xewY0u+D66N8SXiUqK1pDE9fBZcMWqJit240W9++Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"223d730869f10d9d323cd86d5bcf218ed79d7fa97f37c46ea91e4465bad1f314","last_reissued_at":"2026-05-18T00:24:42.671741Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:42.671741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.02651","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:24:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EPKgqEXSUJA3FsmPxbU/Xqg+dcvBB6f0lsWeAHQI7jkgw2miqrmIN8o4BTKDWLLFimwWoPYh6C5IbC8Zq0p0Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T21:01:17.571448Z"},"content_sha256":"93423427aac19c4e8b74a5168a563bb1f8ffee61d300ab0cb90458e52a61297d","schema_version":"1.0","event_id":"sha256:93423427aac19c4e8b74a5168a563bb1f8ffee61d300ab0cb90458e52a61297d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:EI6XGCDJ6EGZ2MR43BWVXTZBR3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Model-Based Speech Enhancement in the Modulation Domain","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.SD","authors_text":"Mike Brookes, Yu Wang","submitted_at":"2017-07-09T22:37:26Z","abstract_excerpt":"This paper presents an algorithm for modulation-domain speech enhancement using a Kalman filter. The proposed estimator jointly models the estimated dynamics of the spectral amplitudes of speech and noise to obtain an MMSE estimation of the speech amplitude spectrum with the assumption that the speech and noise are additive in the complex domain. In order to include the dynamics of noise amplitudes with those of speech amplitudes, we propose a statistical \"Gaussring\" model that comprises a mixture of Gaussians whose centers lie in a circle on the complex plane. The performance of the proposed "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.02651","kind":"arxiv","version":3},"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":"2026-05-18T00:24:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0aB3fMSW6UlpK3gVl51P+SLDEeYsRZIRDqzSIeLrF9TThm6yECQbijKpybS/9++3Ro+ZJ5LNrGJ+sm5BPRSPAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-20T21:01:17.571792Z"},"content_sha256":"f148bf17a5ecca3eafe6953aa3bff2525b7edc6027c8ce9f991923d94bd3f1a2","schema_version":"1.0","event_id":"sha256:f148bf17a5ecca3eafe6953aa3bff2525b7edc6027c8ce9f991923d94bd3f1a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/bundle.json","state_url":"https://pith.science/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/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":"2026-06-20T21:01:17Z","links":{"resolver":"https://pith.science/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3","bundle":"https://pith.science/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/bundle.json","state":"https://pith.science/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EI6XGCDJ6EGZ2MR43BWVXTZBR3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:EI6XGCDJ6EGZ2MR43BWVXTZBR3","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":"d5e31880d877c3761d121158d08769e8f6a9ed97da4337e2151be02f7892f405","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2017-07-09T22:37:26Z","title_canon_sha256":"b120a451c84373d5793aa60c1cb2b25bda5ba2659524d6d4fd956a74cf570a68"},"schema_version":"1.0","source":{"id":"1707.02651","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.02651","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"arxiv_version","alias_value":"1707.02651v3","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.02651","created_at":"2026-05-18T00:24:42Z"},{"alias_kind":"pith_short_12","alias_value":"EI6XGCDJ6EGZ","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"EI6XGCDJ6EGZ2MR4","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"EI6XGCDJ","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:f148bf17a5ecca3eafe6953aa3bff2525b7edc6027c8ce9f991923d94bd3f1a2","target":"graph","created_at":"2026-05-18T00:24:42Z","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 paper presents an algorithm for modulation-domain speech enhancement using a Kalman filter. The proposed estimator jointly models the estimated dynamics of the spectral amplitudes of speech and noise to obtain an MMSE estimation of the speech amplitude spectrum with the assumption that the speech and noise are additive in the complex domain. In order to include the dynamics of noise amplitudes with those of speech amplitudes, we propose a statistical \"Gaussring\" model that comprises a mixture of Gaussians whose centers lie in a circle on the complex plane. The performance of the proposed ","authors_text":"Mike Brookes, Yu Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2017-07-09T22:37:26Z","title":"Model-Based Speech Enhancement in the Modulation Domain"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.02651","kind":"arxiv","version":3},"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":"sha256:93423427aac19c4e8b74a5168a563bb1f8ffee61d300ab0cb90458e52a61297d","target":"record","created_at":"2026-05-18T00:24:42Z","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":"d5e31880d877c3761d121158d08769e8f6a9ed97da4337e2151be02f7892f405","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2017-07-09T22:37:26Z","title_canon_sha256":"b120a451c84373d5793aa60c1cb2b25bda5ba2659524d6d4fd956a74cf570a68"},"schema_version":"1.0","source":{"id":"1707.02651","kind":"arxiv","version":3}},"canonical_sha256":"223d730869f10d9d323cd86d5bcf218ed79d7fa97f37c46ea91e4465bad1f314","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"223d730869f10d9d323cd86d5bcf218ed79d7fa97f37c46ea91e4465bad1f314","first_computed_at":"2026-05-18T00:24:42.671741Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:42.671741Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"y3CuMVvYXb3ZA2+aqd0zmUfNXXSsZ+UBM98Ic+fZ1UP3xewY0u+D66N8SXiUqK1pDE9fBZcMWqJit240W9++Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:42.672382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.02651","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:93423427aac19c4e8b74a5168a563bb1f8ffee61d300ab0cb90458e52a61297d","sha256:f148bf17a5ecca3eafe6953aa3bff2525b7edc6027c8ce9f991923d94bd3f1a2"],"state_sha256":"29cd5ca35fff31f103311ef62ef8fbf99bc325916fb84edd9b2a513dab4b28a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+BCpqH8EC2cy4OJLi9omkpCiFPzlxHRMSfBvN+BjlNj7A2ZnZaggCEUA81W7IvTM4ilXPW0K2njVLwtyYP/eDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-20T21:01:17.573709Z","bundle_sha256":"eef905a98f86eb35acdd2eadf98c5a634864543fd59a59bd40c62c532a7148aa"}}