{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:63O2JPGEI5YIJZQ4T6BEL7CY2X","short_pith_number":"pith:63O2JPGE","canonical_record":{"source":{"id":"1908.08668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2019-08-23T05:14:37Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"d410413ba82793c7b875912c2635941f771762052fd0c8549d1b5169acfdfb7e","abstract_canon_sha256":"531b2b82e26672675bb4f649918abbbd95579010b10462881777ab7ade838aaa"},"schema_version":"1.0"},"canonical_sha256":"f6dda4bcc4477084e61c9f8245fc58d5c532a47ece843d7ae2ad977c42558057","source":{"kind":"arxiv","id":"1908.08668","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08668","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08668v1","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08668","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_12","alias_value":"63O2JPGEI5YI","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_16","alias_value":"63O2JPGEI5YIJZQ4","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_8","alias_value":"63O2JPGE","created_at":"2026-07-04T23:59:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:63O2JPGEI5YIJZQ4T6BEL7CY2X","target":"record","payload":{"canonical_record":{"source":{"id":"1908.08668","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2019-08-23T05:14:37Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"d410413ba82793c7b875912c2635941f771762052fd0c8549d1b5169acfdfb7e","abstract_canon_sha256":"531b2b82e26672675bb4f649918abbbd95579010b10462881777ab7ade838aaa"},"schema_version":"1.0"},"canonical_sha256":"f6dda4bcc4477084e61c9f8245fc58d5c532a47ece843d7ae2ad977c42558057","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:59:16.612733Z","signature_b64":"jumte21b0g9bU7ROq1S3Pm2XOPRpha/rBSlBAULZNznP4CS8jLycWilENfmrT9yUXWegchR2upYRhREetbbFAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6dda4bcc4477084e61c9f8245fc58d5c532a47ece843d7ae2ad977c42558057","last_reissued_at":"2026-07-04T23:59:16.612341Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:59:16.612341Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.08668","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":"2026-07-04T23:59:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cszggMZjR8uKjb4L9knhXOlQtQveYizrWUx4SBGhBdHaVsEYJOch2QfCPge7AQD9XlDRxlOYC9XbRWHCqKiNCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T04:39:42.810394Z"},"content_sha256":"06dc0e4dd6615bed6841bbe13dba3490ac3c2964e6739263c09840f07665ce94","schema_version":"1.0","event_id":"sha256:06dc0e4dd6615bed6841bbe13dba3490ac3c2964e6739263c09840f07665ce94"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:63O2JPGEI5YIJZQ4T6BEL7CY2X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"VOP Detection for Read and Conversation Speech using CWT Coefficients and Phone Boundaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"K. Sreenivasa Rao, Kumud Tripathi","submitted_at":"2019-08-23T05:14:37Z","abstract_excerpt":"In this paper, we propose a novel approach for accurate detection of the vowel onset points (VOPs). VOP is the instant at which the vowel begins in the speech signal. Precise identification of VOPs is important for various speech applications such as speech segmentation and speech rate modification. The existing methods detect the majority of VOPs within 40 ms deviation, and it may not be appropriate for the above speech applications. To address this issue, we proposed a two-stage approach for accurate detection of VOPs. At the first stage, VOPs are detected using continuous wavelet transform "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08668","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/1908.08668/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":"2026-07-04T23:59:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y+flRPv4wp1JiZ9ZtgQLXOIg18QDjffqPROHurCnFRSTcSuKAVsywZX1VfO7apbJnEqyH98OLes8cSoM+YksBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T04:39:42.810898Z"},"content_sha256":"f74d33e6ebcbcac5c634fda105ba56084e81fe009664b82c79583c6eb25f28d9","schema_version":"1.0","event_id":"sha256:f74d33e6ebcbcac5c634fda105ba56084e81fe009664b82c79583c6eb25f28d9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/bundle.json","state_url":"https://pith.science/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/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":"2026-08-16T04:39:42Z","links":{"resolver":"https://pith.science/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X","bundle":"https://pith.science/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/bundle.json","state":"https://pith.science/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/63O2JPGEI5YIJZQ4T6BEL7CY2X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:63O2JPGEI5YIJZQ4T6BEL7CY2X","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":"531b2b82e26672675bb4f649918abbbd95579010b10462881777ab7ade838aaa","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2019-08-23T05:14:37Z","title_canon_sha256":"d410413ba82793c7b875912c2635941f771762052fd0c8549d1b5169acfdfb7e"},"schema_version":"1.0","source":{"id":"1908.08668","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08668","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08668v1","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08668","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_12","alias_value":"63O2JPGEI5YI","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_16","alias_value":"63O2JPGEI5YIJZQ4","created_at":"2026-07-04T23:59:16Z"},{"alias_kind":"pith_short_8","alias_value":"63O2JPGE","created_at":"2026-07-04T23:59:16Z"}],"graph_snapshots":[{"event_id":"sha256:f74d33e6ebcbcac5c634fda105ba56084e81fe009664b82c79583c6eb25f28d9","target":"graph","created_at":"2026-07-04T23:59:16Z","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/1908.08668/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this paper, we propose a novel approach for accurate detection of the vowel onset points (VOPs). VOP is the instant at which the vowel begins in the speech signal. Precise identification of VOPs is important for various speech applications such as speech segmentation and speech rate modification. The existing methods detect the majority of VOPs within 40 ms deviation, and it may not be appropriate for the above speech applications. To address this issue, we proposed a two-stage approach for accurate detection of VOPs. At the first stage, VOPs are detected using continuous wavelet transform ","authors_text":"K. Sreenivasa Rao, Kumud Tripathi","cross_cats":["cs.SD"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2019-08-23T05:14:37Z","title":"VOP Detection for Read and Conversation Speech using CWT Coefficients and Phone Boundaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08668","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":"sha256:06dc0e4dd6615bed6841bbe13dba3490ac3c2964e6739263c09840f07665ce94","target":"record","created_at":"2026-07-04T23:59:16Z","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":"531b2b82e26672675bb4f649918abbbd95579010b10462881777ab7ade838aaa","cross_cats_sorted":["cs.SD"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2019-08-23T05:14:37Z","title_canon_sha256":"d410413ba82793c7b875912c2635941f771762052fd0c8549d1b5169acfdfb7e"},"schema_version":"1.0","source":{"id":"1908.08668","kind":"arxiv","version":1}},"canonical_sha256":"f6dda4bcc4477084e61c9f8245fc58d5c532a47ece843d7ae2ad977c42558057","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6dda4bcc4477084e61c9f8245fc58d5c532a47ece843d7ae2ad977c42558057","first_computed_at":"2026-07-04T23:59:16.612341Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:59:16.612341Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jumte21b0g9bU7ROq1S3Pm2XOPRpha/rBSlBAULZNznP4CS8jLycWilENfmrT9yUXWegchR2upYRhREetbbFAw==","signature_status":"signed_v1","signed_at":"2026-07-04T23:59:16.612733Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.08668","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:06dc0e4dd6615bed6841bbe13dba3490ac3c2964e6739263c09840f07665ce94","sha256:f74d33e6ebcbcac5c634fda105ba56084e81fe009664b82c79583c6eb25f28d9"],"state_sha256":"a14218103b34129a3f2988b7cc35f028b1abe35d65f7b537adfc9cddc915a7b6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4/mTa7GDH+bogrZi6uqQVL1qut1SMCDPrQLwHdQ+PM2c+3YtyopLewlCYqlqgj84Y/OQl0CBk26dClbzvEXSDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T04:39:42.816633Z","bundle_sha256":"1aa7cb4301af5a8a234eda06b1d4d1d466aaf4a4d7db070a9136380e6a50757c"}}