{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:2DBB235HOU64WGIKGGBAGKYZJL","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":"261e38b1e6a1276affb568fe5b6c9b7ea77fc9a1ecfad0927cf7c105b771f09b","cross_cats_sorted":["cs.LG","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-05-19T06:25:52Z","title_canon_sha256":"37301c1dee625c7810a6eff29e8e8231b8f49a38e3e77dabe5f0d41fae563e06"},"schema_version":"1.0","source":{"id":"2005.09237","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.09237","created_at":"2026-07-05T01:03:48Z"},{"alias_kind":"arxiv_version","alias_value":"2005.09237v1","created_at":"2026-07-05T01:03:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.09237","created_at":"2026-07-05T01:03:48Z"},{"alias_kind":"pith_short_12","alias_value":"2DBB235HOU64","created_at":"2026-07-05T01:03:48Z"},{"alias_kind":"pith_short_16","alias_value":"2DBB235HOU64WGIK","created_at":"2026-07-05T01:03:48Z"},{"alias_kind":"pith_short_8","alias_value":"2DBB235H","created_at":"2026-07-05T01:03:48Z"}],"graph_snapshots":[{"event_id":"sha256:dd78b4c35a9256f5a04ea58a2e613040919f0c0e96259f3250e74b4ad561332f","target":"graph","created_at":"2026-07-05T01:03:48Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2005.09237/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Acoustic Echo Cancellation (AEC) plays a key role in voice interaction. Due to the explicit mathematical principle and intelligent nature to accommodate conditions, adaptive filters with different types of implementations are always used for AEC, giving considerable performance. However, there would be some kinds of residual echo in the results, including linear residue introduced by mismatching between estimation and the reality and non-linear residue mostly caused by non-linear components on the audio devices. The linear residue can be reduced with elaborate structure and methods, leaving th","authors_text":"Hua Huang, Lu Ma, Pei Zhao, Tengrong Su","cross_cats":["cs.LG","eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-05-19T06:25:52Z","title":"Acoustic Echo Cancellation by Combining Adaptive Digital Filter and Recurrent Neural Network"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.09237","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":"sha256:6346069726ac3595efc5f175da405ffbf77ddea5d42c3195c899870ee94e2068","target":"record","created_at":"2026-07-05T01:03:48Z","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":"261e38b1e6a1276affb568fe5b6c9b7ea77fc9a1ecfad0927cf7c105b771f09b","cross_cats_sorted":["cs.LG","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-05-19T06:25:52Z","title_canon_sha256":"37301c1dee625c7810a6eff29e8e8231b8f49a38e3e77dabe5f0d41fae563e06"},"schema_version":"1.0","source":{"id":"2005.09237","kind":"arxiv","version":1}},"canonical_sha256":"d0c21d6fa7753dcb190a3182032b194adf14f6cb9599a78e85fcb3fd2a0cd3ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0c21d6fa7753dcb190a3182032b194adf14f6cb9599a78e85fcb3fd2a0cd3ce","first_computed_at":"2026-07-05T01:03:48.253978Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:03:48.253978Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"t+tKCRlwOAjTbSIyIio9x9rX0DXFYQY9yXrQE27vQKhPXWV3V7yoO2PMoe610689ZKgf7M/yq1jQRHMor87YBg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:03:48.254417Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.09237","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6346069726ac3595efc5f175da405ffbf77ddea5d42c3195c899870ee94e2068","sha256:dd78b4c35a9256f5a04ea58a2e613040919f0c0e96259f3250e74b4ad561332f"],"state_sha256":"ce07de3217068b5013c376160a2c7538654d9305bdba35aeb7fe22dc2a08c199"}