{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:PQ22B7GRKUYPLOKOQSQGM3M3AM","short_pith_number":"pith:PQ22B7GR","canonical_record":{"source":{"id":"2011.02109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-11-04T03:31:13Z","cross_cats_sorted":[],"title_canon_sha256":"94bb3d389d825692f7bbef27f663f88eb9b30dc9600d2a82f8c17a75800f5780","abstract_canon_sha256":"4a0ef66c6aa1f747f8f8c30a47681676611b9f5f4ed55327cae94560b8428f67"},"schema_version":"1.0"},"canonical_sha256":"7c35a0fcd15530f5b94e84a0666d9b03324eb17d29766ddd7d95487cf88d9ff9","source":{"kind":"arxiv","id":"2011.02109","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.02109","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"arxiv_version","alias_value":"2011.02109v2","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.02109","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_12","alias_value":"PQ22B7GRKUYP","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_16","alias_value":"PQ22B7GRKUYPLOKO","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_8","alias_value":"PQ22B7GR","created_at":"2026-07-05T04:47:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:PQ22B7GRKUYPLOKOQSQGM3M3AM","target":"record","payload":{"canonical_record":{"source":{"id":"2011.02109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-11-04T03:31:13Z","cross_cats_sorted":[],"title_canon_sha256":"94bb3d389d825692f7bbef27f663f88eb9b30dc9600d2a82f8c17a75800f5780","abstract_canon_sha256":"4a0ef66c6aa1f747f8f8c30a47681676611b9f5f4ed55327cae94560b8428f67"},"schema_version":"1.0"},"canonical_sha256":"7c35a0fcd15530f5b94e84a0666d9b03324eb17d29766ddd7d95487cf88d9ff9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:47:38.109914Z","signature_b64":"Lmk4IN9Gjo9bXGij/qLnr5C3/4DayLfnHpvA26m3YR6gG7QW9tAWKLE08EehV9CiwslRTnZjPEx4Yx0tWBr9CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7c35a0fcd15530f5b94e84a0666d9b03324eb17d29766ddd7d95487cf88d9ff9","last_reissued_at":"2026-07-05T04:47:38.109513Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:47:38.109513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.02109","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T04:47:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mv6dzDzMn/NkFhXGG2DlIzngiSFkpxaJtqLS1FVqZVTVH3p5ULkfYB7mX1kJvZIyw91MbvPEb3UWunhnmuImCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:56:46.480775Z"},"content_sha256":"d8e00f927ea25a85c46e91beb41bec496e7386ec91e8c1e652030533105396f4","schema_version":"1.0","event_id":"sha256:d8e00f927ea25a85c46e91beb41bec496e7386ec91e8c1e652030533105396f4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:PQ22B7GRKUYPLOKOQSQGM3M3AM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deep Multi-task Network for Delay Estimation and Echo Cancellation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.AS","authors_text":"Chengyun Deng, Hui Song, Shiqian Ma, Yi Zhang, Yongtao Sha","submitted_at":"2020-11-04T03:31:13Z","abstract_excerpt":"Echo path delay (or ref-delay) estimation is a big challenge in acoustic echo cancellation. Different devices may introduce various ref-delay in practice. Ref-delay inconsistency slows down the convergence of adaptive filters, and also degrades the performance of deep learning models due to 'unseen' ref-delays in the training set. In this paper, a multi-task network is proposed to address both ref-delay estimation and echo cancellation tasks. The proposed architecture consists of two convolutional recurrent networks (CRNNs) to estimate the echo and enhanced signals separately, as well as a ful"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.02109","kind":"arxiv","version":2},"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/2011.02109/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":"2026-07-05T04:47:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b9q6jTdSbX/czuqoFM9b+Ko4HIflT2jkmbc7hdbkN/5gK3XyhSXrhogH1Z8zIHnK+zNhTyUaazrGiGSIPDfsBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T12:56:46.481412Z"},"content_sha256":"0883db8d3278815f5c8c8f15a5a1680d170284249f890a656906ef777ebc3e62","schema_version":"1.0","event_id":"sha256:0883db8d3278815f5c8c8f15a5a1680d170284249f890a656906ef777ebc3e62"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/bundle.json","state_url":"https://pith.science/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/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":"2026-07-05T12:56:46Z","links":{"resolver":"https://pith.science/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM","bundle":"https://pith.science/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/bundle.json","state":"https://pith.science/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PQ22B7GRKUYPLOKOQSQGM3M3AM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:PQ22B7GRKUYPLOKOQSQGM3M3AM","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":"4a0ef66c6aa1f747f8f8c30a47681676611b9f5f4ed55327cae94560b8428f67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-11-04T03:31:13Z","title_canon_sha256":"94bb3d389d825692f7bbef27f663f88eb9b30dc9600d2a82f8c17a75800f5780"},"schema_version":"1.0","source":{"id":"2011.02109","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.02109","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"arxiv_version","alias_value":"2011.02109v2","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.02109","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_12","alias_value":"PQ22B7GRKUYP","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_16","alias_value":"PQ22B7GRKUYPLOKO","created_at":"2026-07-05T04:47:38Z"},{"alias_kind":"pith_short_8","alias_value":"PQ22B7GR","created_at":"2026-07-05T04:47:38Z"}],"graph_snapshots":[{"event_id":"sha256:0883db8d3278815f5c8c8f15a5a1680d170284249f890a656906ef777ebc3e62","target":"graph","created_at":"2026-07-05T04:47:38Z","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/2011.02109/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Echo path delay (or ref-delay) estimation is a big challenge in acoustic echo cancellation. Different devices may introduce various ref-delay in practice. Ref-delay inconsistency slows down the convergence of adaptive filters, and also degrades the performance of deep learning models due to 'unseen' ref-delays in the training set. In this paper, a multi-task network is proposed to address both ref-delay estimation and echo cancellation tasks. The proposed architecture consists of two convolutional recurrent networks (CRNNs) to estimate the echo and enhanced signals separately, as well as a ful","authors_text":"Chengyun Deng, Hui Song, Shiqian Ma, Yi Zhang, Yongtao Sha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-11-04T03:31:13Z","title":"Deep Multi-task Network for Delay Estimation and Echo Cancellation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.02109","kind":"arxiv","version":2},"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:d8e00f927ea25a85c46e91beb41bec496e7386ec91e8c1e652030533105396f4","target":"record","created_at":"2026-07-05T04:47:38Z","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":"4a0ef66c6aa1f747f8f8c30a47681676611b9f5f4ed55327cae94560b8428f67","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2020-11-04T03:31:13Z","title_canon_sha256":"94bb3d389d825692f7bbef27f663f88eb9b30dc9600d2a82f8c17a75800f5780"},"schema_version":"1.0","source":{"id":"2011.02109","kind":"arxiv","version":2}},"canonical_sha256":"7c35a0fcd15530f5b94e84a0666d9b03324eb17d29766ddd7d95487cf88d9ff9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7c35a0fcd15530f5b94e84a0666d9b03324eb17d29766ddd7d95487cf88d9ff9","first_computed_at":"2026-07-05T04:47:38.109513Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:47:38.109513Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Lmk4IN9Gjo9bXGij/qLnr5C3/4DayLfnHpvA26m3YR6gG7QW9tAWKLE08EehV9CiwslRTnZjPEx4Yx0tWBr9CQ==","signature_status":"signed_v1","signed_at":"2026-07-05T04:47:38.109914Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.02109","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8e00f927ea25a85c46e91beb41bec496e7386ec91e8c1e652030533105396f4","sha256:0883db8d3278815f5c8c8f15a5a1680d170284249f890a656906ef777ebc3e62"],"state_sha256":"e4264b323802671d2b20b479d4fbeb5c953321b836a40a37cd5d0b871e7831f1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"srKqxDmysNGHQE4warZYkOnSNA3Ia+bhT//bzdh5M2g/gDtMm5BSZRPFf2HntgmiRjzkjpeY3aVx1OoF1KEHAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T12:56:46.484860Z","bundle_sha256":"b433d394ee4484b8cb1d3aeb114800575acc847748e9ec99ed2217d6c25258f3"}}