{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:SIFWZBCLLHEUM2LKPA3IKQTOZA","short_pith_number":"pith:SIFWZBCL","canonical_record":{"source":{"id":"1805.01259","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-05-03T12:35:06Z","cross_cats_sorted":["cs.CV","eess.AS"],"title_canon_sha256":"538079f6efecb028147430d51ea8a15e6ff4d16da64403179de1712a04aa7f68","abstract_canon_sha256":"e0b2ad2a65f9e5454cf1f30f31f35e4a5a47fcde46a25b5eba97fd7a79b0376b"},"schema_version":"1.0"},"canonical_sha256":"920b6c844b59c946696a783685426ec82814c8afeed15b895ed35f83f31a1fc9","source":{"kind":"arxiv","id":"1805.01259","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01259","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01259v1","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01259","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"pith_short_12","alias_value":"SIFWZBCLLHEU","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SIFWZBCLLHEUM2LK","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SIFWZBCL","created_at":"2026-05-18T12:32:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:SIFWZBCLLHEUM2LKPA3IKQTOZA","target":"record","payload":{"canonical_record":{"source":{"id":"1805.01259","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-05-03T12:35:06Z","cross_cats_sorted":["cs.CV","eess.AS"],"title_canon_sha256":"538079f6efecb028147430d51ea8a15e6ff4d16da64403179de1712a04aa7f68","abstract_canon_sha256":"e0b2ad2a65f9e5454cf1f30f31f35e4a5a47fcde46a25b5eba97fd7a79b0376b"},"schema_version":"1.0"},"canonical_sha256":"920b6c844b59c946696a783685426ec82814c8afeed15b895ed35f83f31a1fc9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:52.039920Z","signature_b64":"mYtkaURRBMeFAYF8cjy5Pj0DYYxd8dQ+fuXT6b/Za1USas+B/zMuik0ijUFxSPeX29GT9ChUT0E8FeBf+TNXCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"920b6c844b59c946696a783685426ec82814c8afeed15b895ed35f83f31a1fc9","last_reissued_at":"2026-05-18T00:16:52.039193Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:52.039193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.01259","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":"2026-05-18T00:16:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"plvAMsao2pUuuudOsbowhtL0ZqdgGscNlsqWxiXna6L64GKi4bIyGn3HavwnZBi/nCQ0l8V6U1IQKnp2Km57DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:56:29.932814Z"},"content_sha256":"f7bd8b141048cfc5be233a482497a60c316a023d3da9f9b8325a619e06a01a7f","schema_version":"1.0","event_id":"sha256:f7bd8b141048cfc5be233a482497a60c316a023d3da9f9b8325a619e06a01a7f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:SIFWZBCLLHEUM2LKPA3IKQTOZA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Noise Invariant Frame Selection: A Simple Method to Address the Background Noise Problem for Text-independent Speaker Verification","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV","eess.AS"],"primary_cat":"cs.SD","authors_text":"Bj\\\"orn Schuller, Linlin Shen, Michel Valstar, Shuimei Zhang, Siyang Song","submitted_at":"2018-05-03T12:35:06Z","abstract_excerpt":"The performance of speaker-related systems usually degrades heavily in practical applications largely due to the presence of background noise. To improve the robustness of such systems in unknown noisy environments, this paper proposes a simple pre-processing method called Noise Invariant Frame Selection (NIFS). Based on several noisy constraints, it selects noise invariant frames from utterances to represent speakers. Experiments conducted on the TIMIT database showed that the NIFS can significantly improve the performance of Vector Quantization (VQ), Gaussian Mixture Model-Universal Backgrou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01259","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":""},"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":"2026-05-18T00:16:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cD/5dCGTQ+vn3rn3ofgSYqndttjK17jE+hHxpBldybi8O/qd7wexqqiqf8X7pJeuUhzWS+QYjsH3hpp/sXlhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:56:29.933503Z"},"content_sha256":"ee3da09c99b7cedb5977f7868fbca3c4766264b035acafae5a75325e86417eca","schema_version":"1.0","event_id":"sha256:ee3da09c99b7cedb5977f7868fbca3c4766264b035acafae5a75325e86417eca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/bundle.json","state_url":"https://pith.science/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/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":"2026-05-31T10:56:29Z","links":{"resolver":"https://pith.science/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA","bundle":"https://pith.science/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/bundle.json","state":"https://pith.science/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SIFWZBCLLHEUM2LKPA3IKQTOZA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SIFWZBCLLHEUM2LKPA3IKQTOZA","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":"e0b2ad2a65f9e5454cf1f30f31f35e4a5a47fcde46a25b5eba97fd7a79b0376b","cross_cats_sorted":["cs.CV","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-05-03T12:35:06Z","title_canon_sha256":"538079f6efecb028147430d51ea8a15e6ff4d16da64403179de1712a04aa7f68"},"schema_version":"1.0","source":{"id":"1805.01259","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.01259","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"arxiv_version","alias_value":"1805.01259v1","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.01259","created_at":"2026-05-18T00:16:52Z"},{"alias_kind":"pith_short_12","alias_value":"SIFWZBCLLHEU","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SIFWZBCLLHEUM2LK","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SIFWZBCL","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:ee3da09c99b7cedb5977f7868fbca3c4766264b035acafae5a75325e86417eca","target":"graph","created_at":"2026-05-18T00:16:52Z","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":"The performance of speaker-related systems usually degrades heavily in practical applications largely due to the presence of background noise. To improve the robustness of such systems in unknown noisy environments, this paper proposes a simple pre-processing method called Noise Invariant Frame Selection (NIFS). Based on several noisy constraints, it selects noise invariant frames from utterances to represent speakers. Experiments conducted on the TIMIT database showed that the NIFS can significantly improve the performance of Vector Quantization (VQ), Gaussian Mixture Model-Universal Backgrou","authors_text":"Bj\\\"orn Schuller, Linlin Shen, Michel Valstar, Shuimei Zhang, Siyang Song","cross_cats":["cs.CV","eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-05-03T12:35:06Z","title":"Noise Invariant Frame Selection: A Simple Method to Address the Background Noise Problem for Text-independent Speaker Verification"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.01259","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:f7bd8b141048cfc5be233a482497a60c316a023d3da9f9b8325a619e06a01a7f","target":"record","created_at":"2026-05-18T00:16:52Z","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":"e0b2ad2a65f9e5454cf1f30f31f35e4a5a47fcde46a25b5eba97fd7a79b0376b","cross_cats_sorted":["cs.CV","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2018-05-03T12:35:06Z","title_canon_sha256":"538079f6efecb028147430d51ea8a15e6ff4d16da64403179de1712a04aa7f68"},"schema_version":"1.0","source":{"id":"1805.01259","kind":"arxiv","version":1}},"canonical_sha256":"920b6c844b59c946696a783685426ec82814c8afeed15b895ed35f83f31a1fc9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"920b6c844b59c946696a783685426ec82814c8afeed15b895ed35f83f31a1fc9","first_computed_at":"2026-05-18T00:16:52.039193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:52.039193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mYtkaURRBMeFAYF8cjy5Pj0DYYxd8dQ+fuXT6b/Za1USas+B/zMuik0ijUFxSPeX29GT9ChUT0E8FeBf+TNXCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:52.039920Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.01259","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7bd8b141048cfc5be233a482497a60c316a023d3da9f9b8325a619e06a01a7f","sha256:ee3da09c99b7cedb5977f7868fbca3c4766264b035acafae5a75325e86417eca"],"state_sha256":"f3ea996486d5fe63f1a624f921032d923a8731f6e8170db6acfeb17faa140c7e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K0uH5uK5xSRIZ3UrrAxruWIWJv0uzj2sL0MaBsex75mccgKMQ5KzZRvcWleeQggNpPZ/d7geowBFQUpargbeAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:56:29.937760Z","bundle_sha256":"5ffb4fb850c13fac33d952a15b4891cab9c19fcc6fc13fe1493316de6f13fbc7"}}