{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2VJ6F6PIWJRRM2WONGRZ7RYRSL","short_pith_number":"pith:2VJ6F6PI","canonical_record":{"source":{"id":"1105.2770","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2011-05-13T16:32:44Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"4a5d77f077ab1335bcbf3a3d650b6f06e5577e35f596e69b320326dc651d63e8","abstract_canon_sha256":"570b952634645044d57636ad87a8e83878f20dd198a39f519e4e257fb6455524"},"schema_version":"1.0"},"canonical_sha256":"d553e2f9e8b263166ace69a39fc71192fcf96967c8def0253680b3d1907b752c","source":{"kind":"arxiv","id":"1105.2770","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.2770","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"arxiv_version","alias_value":"1105.2770v2","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.2770","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"pith_short_12","alias_value":"2VJ6F6PIWJRR","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2VJ6F6PIWJRRM2WO","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2VJ6F6PI","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2VJ6F6PIWJRRM2WONGRZ7RYRSL","target":"record","payload":{"canonical_record":{"source":{"id":"1105.2770","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2011-05-13T16:32:44Z","cross_cats_sorted":["cs.MM"],"title_canon_sha256":"4a5d77f077ab1335bcbf3a3d650b6f06e5577e35f596e69b320326dc651d63e8","abstract_canon_sha256":"570b952634645044d57636ad87a8e83878f20dd198a39f519e4e257fb6455524"},"schema_version":"1.0"},"canonical_sha256":"d553e2f9e8b263166ace69a39fc71192fcf96967c8def0253680b3d1907b752c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:22:00.266867Z","signature_b64":"Nykw2GAnZ2YfuiazbFWw630N5LVpX/TDy8TSHALZI91Z1eMmz3ubd6qd+aRvFgN0iVbuIPaVeLCB9mJLKhJxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d553e2f9e8b263166ace69a39fc71192fcf96967c8def0253680b3d1907b752c","last_reissued_at":"2026-05-18T02:22:00.266141Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:22:00.266141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1105.2770","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":"2026-05-18T02:22:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GUuPpbC5mYC0gpViUy1x4l6zbEIQRT3jm4oACx//KcrbEjBWP8t1zJySzGOMtHV4PJeOwB3UpOissubrFdnKBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T03:00:08.579030Z"},"content_sha256":"88449cf75df2934045ee9983aa328f04b5ae4c0f995ba03968ff596fc59e6213","schema_version":"1.0","event_id":"sha256:88449cf75df2934045ee9983aa328f04b5ae4c0f995ba03968ff596fc59e6213"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2VJ6F6PIWJRRM2WONGRZ7RYRSL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Improving Performance of Speaker Identification System Using Complementary Information Fusion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.MM"],"primary_cat":"cs.SD","authors_text":"Goutam Saha, Md. Sahidullah, Sandipan Chakroborty","submitted_at":"2011-05-13T16:32:44Z","abstract_excerpt":"Feature extraction plays an important role as a front-end processing block in speaker identification (SI) process. Most of the SI systems utilize like Mel-Frequency Cepstral Coefficients (MFCC), Perceptual Linear Prediction (PLP), Linear Predictive Cepstral Coefficients (LPCC), as a feature for representing speech signal. Their derivations are based on short term processing of speech signal and they try to capture the vocal tract information ignoring the contribution from the vocal cord. Vocal cord cues are equally important in SI context, as the information like pitch frequency, phase in the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.2770","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":""},"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":"2026-05-18T02:22:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N5xWLXinCe/nXSUyzAty7QHVnGKI7UklkNCwbKxEiLZ3RicrkrrTCzzUF3DkqTMQeewep4+u2C0vUHnXdz1OCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T03:00:08.579387Z"},"content_sha256":"c807d1e90b9b57fea27449c014a120caf6f03c939cb34a3f0f48b25bd1df1c2f","schema_version":"1.0","event_id":"sha256:c807d1e90b9b57fea27449c014a120caf6f03c939cb34a3f0f48b25bd1df1c2f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/bundle.json","state_url":"https://pith.science/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/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":"2026-06-29T03:00:08Z","links":{"resolver":"https://pith.science/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL","bundle":"https://pith.science/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/bundle.json","state":"https://pith.science/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2VJ6F6PIWJRRM2WONGRZ7RYRSL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2VJ6F6PIWJRRM2WONGRZ7RYRSL","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":"570b952634645044d57636ad87a8e83878f20dd198a39f519e4e257fb6455524","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2011-05-13T16:32:44Z","title_canon_sha256":"4a5d77f077ab1335bcbf3a3d650b6f06e5577e35f596e69b320326dc651d63e8"},"schema_version":"1.0","source":{"id":"1105.2770","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1105.2770","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"arxiv_version","alias_value":"1105.2770v2","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.2770","created_at":"2026-05-18T02:22:00Z"},{"alias_kind":"pith_short_12","alias_value":"2VJ6F6PIWJRR","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2VJ6F6PIWJRRM2WO","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2VJ6F6PI","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:c807d1e90b9b57fea27449c014a120caf6f03c939cb34a3f0f48b25bd1df1c2f","target":"graph","created_at":"2026-05-18T02:22:00Z","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":"Feature extraction plays an important role as a front-end processing block in speaker identification (SI) process. Most of the SI systems utilize like Mel-Frequency Cepstral Coefficients (MFCC), Perceptual Linear Prediction (PLP), Linear Predictive Cepstral Coefficients (LPCC), as a feature for representing speech signal. Their derivations are based on short term processing of speech signal and they try to capture the vocal tract information ignoring the contribution from the vocal cord. Vocal cord cues are equally important in SI context, as the information like pitch frequency, phase in the ","authors_text":"Goutam Saha, Md. Sahidullah, Sandipan Chakroborty","cross_cats":["cs.MM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2011-05-13T16:32:44Z","title":"Improving Performance of Speaker Identification System Using Complementary Information Fusion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.2770","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":"sha256:88449cf75df2934045ee9983aa328f04b5ae4c0f995ba03968ff596fc59e6213","target":"record","created_at":"2026-05-18T02:22:00Z","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":"570b952634645044d57636ad87a8e83878f20dd198a39f519e4e257fb6455524","cross_cats_sorted":["cs.MM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2011-05-13T16:32:44Z","title_canon_sha256":"4a5d77f077ab1335bcbf3a3d650b6f06e5577e35f596e69b320326dc651d63e8"},"schema_version":"1.0","source":{"id":"1105.2770","kind":"arxiv","version":2}},"canonical_sha256":"d553e2f9e8b263166ace69a39fc71192fcf96967c8def0253680b3d1907b752c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d553e2f9e8b263166ace69a39fc71192fcf96967c8def0253680b3d1907b752c","first_computed_at":"2026-05-18T02:22:00.266141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:22:00.266141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Nykw2GAnZ2YfuiazbFWw630N5LVpX/TDy8TSHALZI91Z1eMmz3ubd6qd+aRvFgN0iVbuIPaVeLCB9mJLKhJxBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:22:00.266867Z","signed_message":"canonical_sha256_bytes"},"source_id":"1105.2770","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88449cf75df2934045ee9983aa328f04b5ae4c0f995ba03968ff596fc59e6213","sha256:c807d1e90b9b57fea27449c014a120caf6f03c939cb34a3f0f48b25bd1df1c2f"],"state_sha256":"8cc9bf0c3e3e53030c650cb4bcdbc68d72458be449be525394acf5797b20a09a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f8QAAQSSPSgtdn2tR14muuioQuawkpOwHZkSsd+ezp+mxyLgCUkxV/sW45mYLCtO5lSBDNnYrD/5jwNQhFw7AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T03:00:08.581212Z","bundle_sha256":"1d3c386dfbcba1245caa8ff99caa635a916b58f3fff02aa65a4d03b5d7588d35"}}