{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5PFCBCCDFGGLEHGB2AZF5QS6AQ","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":"ca83fd8aa21718482fdbad0e809fdc03d108c8fb5b1aef1dd6ad15a49efb03d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2014-11-03T06:27:13Z","title_canon_sha256":"9be1c1176d74085cbb6faaa88a62c87de7551d563545c67d81d16906d5d3d9e0"},"schema_version":"1.0","source":{"id":"1411.0370","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.0370","created_at":"2026-05-18T02:38:45Z"},{"alias_kind":"arxiv_version","alias_value":"1411.0370v1","created_at":"2026-05-18T02:38:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.0370","created_at":"2026-05-18T02:38:45Z"},{"alias_kind":"pith_short_12","alias_value":"5PFCBCCDFGGL","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5PFCBCCDFGGLEHGB","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5PFCBCCD","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:f812926b55204c63b123f5bd1742ff6054a5d63aa9e9e078492a4ad4ea1d2d47","target":"graph","created_at":"2026-05-18T02:38:45Z","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":"Detection of transitions between broad phonetic classes in a speech signal is an important problem which has applications such as landmark detection and segmentation. The proposed hierarchical method detects silence to non-silence transitions, high amplitude (mostly sonorants) to low ampli- tude (mostly fricatives/affricates/stop bursts) transitions and vice-versa. A subset of the extremum (minimum or maximum) samples between every pair of successive zero-crossings is selected above a second pass threshold, from each bandpass filtered speech signal frame. Relative to the mid-point (reference) ","authors_text":"A G Ramakrishnan, K V Vijay Girish, T V Ananthapadmanabha","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2014-11-03T06:27:13Z","title":"Detection of transitions between broad phonetic classes in a speech signal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.0370","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":"sha256:2c3e8bef888d5baceef562c03cbc22d57434cde5fe4b9d7d284918d6c8207bfa","target":"record","created_at":"2026-05-18T02:38:45Z","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":"ca83fd8aa21718482fdbad0e809fdc03d108c8fb5b1aef1dd6ad15a49efb03d7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2014-11-03T06:27:13Z","title_canon_sha256":"9be1c1176d74085cbb6faaa88a62c87de7551d563545c67d81d16906d5d3d9e0"},"schema_version":"1.0","source":{"id":"1411.0370","kind":"arxiv","version":1}},"canonical_sha256":"ebca208843298cb21cc1d0325ec25e0424a045759727e55d737f5030535b1bd5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ebca208843298cb21cc1d0325ec25e0424a045759727e55d737f5030535b1bd5","first_computed_at":"2026-05-18T02:38:45.659262Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:38:45.659262Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D7wK36ycIyyo9R/pUkoRf6O2s9MXn0GA1dWkxzUOHVBnEE7eDtveOdk0lwge6CCAplRbGb05Mk8f8pywF6cpDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:38:45.659765Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.0370","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2c3e8bef888d5baceef562c03cbc22d57434cde5fe4b9d7d284918d6c8207bfa","sha256:f812926b55204c63b123f5bd1742ff6054a5d63aa9e9e078492a4ad4ea1d2d47"],"state_sha256":"aac59d91478c2ed1da22e27f9cf4fcf120287ba7cb762f143e5155e5ae9f5aff"}