{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:RSHS3QMQM6UNVLNDEUFE2QHCAG","short_pith_number":"pith:RSHS3QMQ","canonical_record":{"source":{"id":"2303.06566","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2023-03-12T04:29:19Z","cross_cats_sorted":[],"title_canon_sha256":"f8bcf874c78047c6953098e1b1aa69c4fbd2a76278df26333febc5ce3ea360ba","abstract_canon_sha256":"59d8f819a603f5106201818f44ea4044c3e22d6a48dc967fa1266a44c7fb090c"},"schema_version":"1.0"},"canonical_sha256":"8c8f2dc19067a8daada3250a4d40e201ac239a1a75ebccc2fb3e449e0a8650d1","source":{"kind":"arxiv","id":"2303.06566","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.06566","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"arxiv_version","alias_value":"2303.06566v4","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.06566","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_12","alias_value":"RSHS3QMQM6UN","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_16","alias_value":"RSHS3QMQM6UNVLND","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_8","alias_value":"RSHS3QMQ","created_at":"2026-07-05T07:00:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:RSHS3QMQM6UNVLNDEUFE2QHCAG","target":"record","payload":{"canonical_record":{"source":{"id":"2303.06566","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2023-03-12T04:29:19Z","cross_cats_sorted":[],"title_canon_sha256":"f8bcf874c78047c6953098e1b1aa69c4fbd2a76278df26333febc5ce3ea360ba","abstract_canon_sha256":"59d8f819a603f5106201818f44ea4044c3e22d6a48dc967fa1266a44c7fb090c"},"schema_version":"1.0"},"canonical_sha256":"8c8f2dc19067a8daada3250a4d40e201ac239a1a75ebccc2fb3e449e0a8650d1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:00:21.854071Z","signature_b64":"uR52MQjxOSBHb4jgP1oLPZdHC4XGj3/hEPK/GRWErIVQbbsAlSMEzxvTKI3XztdGX72NSt77pnQpLi/kmV3wAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8c8f2dc19067a8daada3250a4d40e201ac239a1a75ebccc2fb3e449e0a8650d1","last_reissued_at":"2026-07-05T07:00:21.853578Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:00:21.853578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.06566","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:00:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ygorhXmOVZEDpFcwnn6QDgMJ2Xh7W/UvFsNIy2sjNk13bQ6MgUZ/H0E/iL+IqQN3Jm8bucsIe2724LQu3xtmCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:45:30.072532Z"},"content_sha256":"bf769d7f3b70fd03762fa1bf2253429caf248f05abb74b6154e1f9248b1c9561","schema_version":"1.0","event_id":"sha256:bf769d7f3b70fd03762fa1bf2253429caf248f05abb74b6154e1f9248b1c9561"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:RSHS3QMQM6UNVLNDEUFE2QHCAG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"ICASSP 2023 Speech Signal Improvement Challenge","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"eess.AS","authors_text":"Ando Saabas, Babak Naderi, Nicolae-C\\u{a}t\\u{a}lin Ristea, Ross Cutler, Sebastian Braun, Solomiya Branets","submitted_at":"2023-03-12T04:29:19Z","abstract_excerpt":"The ICASSP 2023 Speech Signal Improvement Challenge is intended to stimulate research in the area of improving the speech signal quality in communication systems. The speech signal quality can be measured with SIG in ITU-T P.835 and is still a top issue in audio communication and conferencing systems. For example, in the ICASSP 2022 Deep Noise Suppression challenge, the improvement in the background and overall quality is impressive, but the improvement in the speech signal is not statistically significant. To improve the speech signal the following speech impairment areas must be addressed: c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.06566","kind":"arxiv","version":4},"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/2303.06566/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":"2026-07-05T07:00:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EKJsYSGZXYsgCP9T8CkHEM86G1ZlFGHEtfaUM+W3Ho0EIkD+FU3HiOQ0EGxMA/z5ujJhu0QZf3xa5nLRAwBRCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T09:45:30.072920Z"},"content_sha256":"e54199fa259aac3afeb73e2d20f250fea89154951a86e0fac9ba1c1827895688","schema_version":"1.0","event_id":"sha256:e54199fa259aac3afeb73e2d20f250fea89154951a86e0fac9ba1c1827895688"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/bundle.json","state_url":"https://pith.science/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/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":"2026-07-07T09:45:30Z","links":{"resolver":"https://pith.science/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG","bundle":"https://pith.science/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/bundle.json","state":"https://pith.science/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RSHS3QMQM6UNVLNDEUFE2QHCAG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:RSHS3QMQM6UNVLNDEUFE2QHCAG","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":"59d8f819a603f5106201818f44ea4044c3e22d6a48dc967fa1266a44c7fb090c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2023-03-12T04:29:19Z","title_canon_sha256":"f8bcf874c78047c6953098e1b1aa69c4fbd2a76278df26333febc5ce3ea360ba"},"schema_version":"1.0","source":{"id":"2303.06566","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.06566","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"arxiv_version","alias_value":"2303.06566v4","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.06566","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_12","alias_value":"RSHS3QMQM6UN","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_16","alias_value":"RSHS3QMQM6UNVLND","created_at":"2026-07-05T07:00:21Z"},{"alias_kind":"pith_short_8","alias_value":"RSHS3QMQ","created_at":"2026-07-05T07:00:21Z"}],"graph_snapshots":[{"event_id":"sha256:e54199fa259aac3afeb73e2d20f250fea89154951a86e0fac9ba1c1827895688","target":"graph","created_at":"2026-07-05T07:00:21Z","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/2303.06566/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The ICASSP 2023 Speech Signal Improvement Challenge is intended to stimulate research in the area of improving the speech signal quality in communication systems. The speech signal quality can be measured with SIG in ITU-T P.835 and is still a top issue in audio communication and conferencing systems. For example, in the ICASSP 2022 Deep Noise Suppression challenge, the improvement in the background and overall quality is impressive, but the improvement in the speech signal is not statistically significant. To improve the speech signal the following speech impairment areas must be addressed: c","authors_text":"Ando Saabas, Babak Naderi, Nicolae-C\\u{a}t\\u{a}lin Ristea, Ross Cutler, Sebastian Braun, Solomiya Branets","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2023-03-12T04:29:19Z","title":"ICASSP 2023 Speech Signal Improvement Challenge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.06566","kind":"arxiv","version":4},"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:bf769d7f3b70fd03762fa1bf2253429caf248f05abb74b6154e1f9248b1c9561","target":"record","created_at":"2026-07-05T07:00:21Z","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":"59d8f819a603f5106201818f44ea4044c3e22d6a48dc967fa1266a44c7fb090c","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2023-03-12T04:29:19Z","title_canon_sha256":"f8bcf874c78047c6953098e1b1aa69c4fbd2a76278df26333febc5ce3ea360ba"},"schema_version":"1.0","source":{"id":"2303.06566","kind":"arxiv","version":4}},"canonical_sha256":"8c8f2dc19067a8daada3250a4d40e201ac239a1a75ebccc2fb3e449e0a8650d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c8f2dc19067a8daada3250a4d40e201ac239a1a75ebccc2fb3e449e0a8650d1","first_computed_at":"2026-07-05T07:00:21.853578Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:00:21.853578Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uR52MQjxOSBHb4jgP1oLPZdHC4XGj3/hEPK/GRWErIVQbbsAlSMEzxvTKI3XztdGX72NSt77pnQpLi/kmV3wAg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:00:21.854071Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.06566","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf769d7f3b70fd03762fa1bf2253429caf248f05abb74b6154e1f9248b1c9561","sha256:e54199fa259aac3afeb73e2d20f250fea89154951a86e0fac9ba1c1827895688"],"state_sha256":"a5404db99c2cc0803646d9b1405b8479fd44d9919669dcade0d855a05bc419a1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DpElwi0/ii78s43NRA9eCCiToMUILhwmSS8r5YERkKzVe4e+kqbLvPsRpo7qyT9B3YmtogS7Da8lRLoZdaQ7Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T09:45:30.074926Z","bundle_sha256":"4df40768388966dfeaaacdd5d992d2da24face4fd5dfae1d439ff48be69a8c0c"}}