{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:Q4OF7KBORAKJNXVCNC2XOIU3AF","short_pith_number":"pith:Q4OF7KBO","canonical_record":{"source":{"id":"2105.14666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2021-05-31T01:39:08Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"418b2c145b67997a7cdd60424ff6db13abdf6d753e4cadcbf2f61e5c4adfcf7f","abstract_canon_sha256":"b70c439abc6a83e13c5430e7ef97ea99d65cf3f0c3cb77eef59eba779f5c949b"},"schema_version":"1.0"},"canonical_sha256":"871c5fa82e881496dea268b577229b01684cf73d616509fd63b9122df7cc4e33","source":{"kind":"arxiv","id":"2105.14666","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.14666","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"arxiv_version","alias_value":"2105.14666v1","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.14666","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_12","alias_value":"Q4OF7KBORAKJ","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_16","alias_value":"Q4OF7KBORAKJNXVC","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_8","alias_value":"Q4OF7KBO","created_at":"2026-07-05T02:44:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:Q4OF7KBORAKJNXVCNC2XOIU3AF","target":"record","payload":{"canonical_record":{"source":{"id":"2105.14666","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2021-05-31T01:39:08Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"418b2c145b67997a7cdd60424ff6db13abdf6d753e4cadcbf2f61e5c4adfcf7f","abstract_canon_sha256":"b70c439abc6a83e13c5430e7ef97ea99d65cf3f0c3cb77eef59eba779f5c949b"},"schema_version":"1.0"},"canonical_sha256":"871c5fa82e881496dea268b577229b01684cf73d616509fd63b9122df7cc4e33","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:44:40.035937Z","signature_b64":"o//mA0SwOawm6XrrtdsInl4qCXqFjCBKXHjBUpFtWSibMZnoJkBtSPXJCYthN274Zs2PmaxHM0fzt8IlOveWAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"871c5fa82e881496dea268b577229b01684cf73d616509fd63b9122df7cc4e33","last_reissued_at":"2026-07-05T02:44:40.035468Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:44:40.035468Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2105.14666","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":"2026-07-05T02:44:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VNebBNqclbKYT8zmpoJKxfq7HZ5PojCPsqT1qUnxg4v1PwG4IfWAx69dXmjfHo9VhrniqkQdVlYvrQnfMQ7HDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:54:38.915262Z"},"content_sha256":"05e55519fc4417f636010d81afe0edcba71cc1f64d680fc8e58fa9b2b72b3ce9","schema_version":"1.0","event_id":"sha256:05e55519fc4417f636010d81afe0edcba71cc1f64d680fc8e58fa9b2b72b3ce9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:Q4OF7KBORAKJNXVCNC2XOIU3AF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"EchoFilter: End-to-End Neural Network for Acoustic Echo Cancellation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.AS"],"primary_cat":"cs.SD","authors_text":"Lu Ma, Song Yang, Xintian Wang, Yaguang Gong, Zhongqin Wu","submitted_at":"2021-05-31T01:39:08Z","abstract_excerpt":"Acoustic Echo Cancellation (AEC) whose aim is to suppress the echo originated from acoustic coupling between loudspeakers and microphones, plays a key role in voice interaction. Linear adaptive filter (AF) is always used for handling this problem. However, since there would be some severe effects in real scenarios, such nonlinear distortions, background noises, and microphone clipping, it would lead to considerable residual echo, giving poor performance in practice. In this paper, we propose an end-to-end network structure for echo cancellation, which is directly done on time-domain audio wave"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.14666","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/2105.14666/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":"2026-07-05T02:44:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MWKEvQcAmApfh317BJvrcnVB8Nkkb/8j0+51BINSnpN+mOq9joW0+e56Lg4nFrrXlU8UcHSt+dqjQXjrKeHaCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:54:38.915634Z"},"content_sha256":"bde8232b3aa8d8d829cb98734641d448ed7d21e65d762510bf4771c4308b610a","schema_version":"1.0","event_id":"sha256:bde8232b3aa8d8d829cb98734641d448ed7d21e65d762510bf4771c4308b610a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/bundle.json","state_url":"https://pith.science/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/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":"2026-07-07T11:54:38Z","links":{"resolver":"https://pith.science/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF","bundle":"https://pith.science/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/bundle.json","state":"https://pith.science/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q4OF7KBORAKJNXVCNC2XOIU3AF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:Q4OF7KBORAKJNXVCNC2XOIU3AF","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":"b70c439abc6a83e13c5430e7ef97ea99d65cf3f0c3cb77eef59eba779f5c949b","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2021-05-31T01:39:08Z","title_canon_sha256":"418b2c145b67997a7cdd60424ff6db13abdf6d753e4cadcbf2f61e5c4adfcf7f"},"schema_version":"1.0","source":{"id":"2105.14666","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.14666","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"arxiv_version","alias_value":"2105.14666v1","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.14666","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_12","alias_value":"Q4OF7KBORAKJ","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_16","alias_value":"Q4OF7KBORAKJNXVC","created_at":"2026-07-05T02:44:40Z"},{"alias_kind":"pith_short_8","alias_value":"Q4OF7KBO","created_at":"2026-07-05T02:44:40Z"}],"graph_snapshots":[{"event_id":"sha256:bde8232b3aa8d8d829cb98734641d448ed7d21e65d762510bf4771c4308b610a","target":"graph","created_at":"2026-07-05T02:44:40Z","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/2105.14666/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Acoustic Echo Cancellation (AEC) whose aim is to suppress the echo originated from acoustic coupling between loudspeakers and microphones, plays a key role in voice interaction. Linear adaptive filter (AF) is always used for handling this problem. However, since there would be some severe effects in real scenarios, such nonlinear distortions, background noises, and microphone clipping, it would lead to considerable residual echo, giving poor performance in practice. In this paper, we propose an end-to-end network structure for echo cancellation, which is directly done on time-domain audio wave","authors_text":"Lu Ma, Song Yang, Xintian Wang, Yaguang Gong, Zhongqin Wu","cross_cats":["eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2021-05-31T01:39:08Z","title":"EchoFilter: End-to-End Neural Network for Acoustic Echo Cancellation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.14666","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":"sha256:05e55519fc4417f636010d81afe0edcba71cc1f64d680fc8e58fa9b2b72b3ce9","target":"record","created_at":"2026-07-05T02:44:40Z","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":"b70c439abc6a83e13c5430e7ef97ea99d65cf3f0c3cb77eef59eba779f5c949b","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2021-05-31T01:39:08Z","title_canon_sha256":"418b2c145b67997a7cdd60424ff6db13abdf6d753e4cadcbf2f61e5c4adfcf7f"},"schema_version":"1.0","source":{"id":"2105.14666","kind":"arxiv","version":1}},"canonical_sha256":"871c5fa82e881496dea268b577229b01684cf73d616509fd63b9122df7cc4e33","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"871c5fa82e881496dea268b577229b01684cf73d616509fd63b9122df7cc4e33","first_computed_at":"2026-07-05T02:44:40.035468Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:44:40.035468Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"o//mA0SwOawm6XrrtdsInl4qCXqFjCBKXHjBUpFtWSibMZnoJkBtSPXJCYthN274Zs2PmaxHM0fzt8IlOveWAw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:44:40.035937Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.14666","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:05e55519fc4417f636010d81afe0edcba71cc1f64d680fc8e58fa9b2b72b3ce9","sha256:bde8232b3aa8d8d829cb98734641d448ed7d21e65d762510bf4771c4308b610a"],"state_sha256":"fc6f59fb3df164e7ce78efd2fcaa510608fac79999f9fcece655a255c0e868c4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lGX/YnR4FlhTHOUTFgm8q0ioARNHBSL9+KJ2Zo1v56CGWmVl9f4NKMmvmjo9iBSNzm2kG+7QqI316q/mMImmCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:54:38.917484Z","bundle_sha256":"1bb553d63e2e735f9fa76efbb9a585ebbf0c2de4789811b84f1728122ee88de6"}}