{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2EQVDHTSHUHI62OK6ECIDNC7LV","short_pith_number":"pith:2EQVDHTS","canonical_record":{"source":{"id":"1504.08021","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2015-04-29T20:56:42Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"8342ed2503fba7990309f38b4fd712e588e5967cc3e90f7e548f4f14b3a6e698","abstract_canon_sha256":"ef2d25125feed6cbe20b9599657bf8cae13bec7e098da5a21b7f4ab379c5d716"},"schema_version":"1.0"},"canonical_sha256":"d121519e723d0e8f69caf10481b45f5d52ce43e3ab75010e9c8657c5171202fd","source":{"kind":"arxiv","id":"1504.08021","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.08021","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"arxiv_version","alias_value":"1504.08021v1","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.08021","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"pith_short_12","alias_value":"2EQVDHTSHUHI","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2EQVDHTSHUHI62OK","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2EQVDHTS","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2EQVDHTSHUHI62OK6ECIDNC7LV","target":"record","payload":{"canonical_record":{"source":{"id":"1504.08021","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2015-04-29T20:56:42Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"8342ed2503fba7990309f38b4fd712e588e5967cc3e90f7e548f4f14b3a6e698","abstract_canon_sha256":"ef2d25125feed6cbe20b9599657bf8cae13bec7e098da5a21b7f4ab379c5d716"},"schema_version":"1.0"},"canonical_sha256":"d121519e723d0e8f69caf10481b45f5d52ce43e3ab75010e9c8657c5171202fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:23.561404Z","signature_b64":"tjWj7qaeyJZX3pLv4kdfO/Pd5rp159fgZYg35HyXIu5cZ0Dy89bsbtEj0Tdn8bonhhbVaqirDunCTdskuHB+Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d121519e723d0e8f69caf10481b45f5d52ce43e3ab75010e9c8657c5171202fd","last_reissued_at":"2026-05-18T02:17:23.560585Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:23.560585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.08021","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":"2026-05-18T02:17:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lV44W2D9H28yTdzAztqLeFOqEHIYS1T8OouWigbQdKi58h/fPBza0Dnll98oHiyyPMvyjfPOzTCGeAhg00Y0AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T23:02:55.955523Z"},"content_sha256":"4a32db493750e8def26acb9946aa004e527a7ec9c2b7f49e7f7bb9fd2bcce1ce","schema_version":"1.0","event_id":"sha256:4a32db493750e8def26acb9946aa004e527a7ec9c2b7f49e7f7bb9fd2bcce1ce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2EQVDHTSHUHI62OK6ECIDNC7LV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Who Spoke What? A Latent Variable Framework for the Joint Decoding of Multiple Speakers and their Keywords","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"cs.SD","authors_text":"Harshavardhan Sundar, Thippur V. Sreenivas","submitted_at":"2015-04-29T20:56:42Z","abstract_excerpt":"In this paper, we present a latent variable (LV) framework to identify all the speakers and their keywords given a multi-speaker mixture signal. We introduce two separate LVs to denote active speakers and the keywords uttered. The dependency of a spoken keyword on the speaker is modeled through a conditional probability mass function. The distribution of the mixture signal is expressed in terms of the LV mass functions and speaker-specific-keyword models. The proposed framework admits stochastic models, representing the probability density function of the observation vectors given that a parti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.08021","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":"2026-05-18T02:17:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GeOQaBH3eKccuSSxwGUAfOHalpdV1NOO99kf8XSf4DglgqwN8nXSZjVhe0DBZBNNwjUv6xRIcUDs7ocglp+uAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T23:02:55.956125Z"},"content_sha256":"529ea8430c09697a8303968a6d9a83ba100e979f78b4732b190aa8be61740e35","schema_version":"1.0","event_id":"sha256:529ea8430c09697a8303968a6d9a83ba100e979f78b4732b190aa8be61740e35"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/bundle.json","state_url":"https://pith.science/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/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":"2026-06-10T23:02:55Z","links":{"resolver":"https://pith.science/pith/2EQVDHTSHUHI62OK6ECIDNC7LV","bundle":"https://pith.science/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/bundle.json","state":"https://pith.science/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2EQVDHTSHUHI62OK6ECIDNC7LV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2EQVDHTSHUHI62OK6ECIDNC7LV","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":"ef2d25125feed6cbe20b9599657bf8cae13bec7e098da5a21b7f4ab379c5d716","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2015-04-29T20:56:42Z","title_canon_sha256":"8342ed2503fba7990309f38b4fd712e588e5967cc3e90f7e548f4f14b3a6e698"},"schema_version":"1.0","source":{"id":"1504.08021","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.08021","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"arxiv_version","alias_value":"1504.08021v1","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.08021","created_at":"2026-05-18T02:17:23Z"},{"alias_kind":"pith_short_12","alias_value":"2EQVDHTSHUHI","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2EQVDHTSHUHI62OK","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2EQVDHTS","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:529ea8430c09697a8303968a6d9a83ba100e979f78b4732b190aa8be61740e35","target":"graph","created_at":"2026-05-18T02:17:23Z","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":"In this paper, we present a latent variable (LV) framework to identify all the speakers and their keywords given a multi-speaker mixture signal. We introduce two separate LVs to denote active speakers and the keywords uttered. The dependency of a spoken keyword on the speaker is modeled through a conditional probability mass function. The distribution of the mixture signal is expressed in terms of the LV mass functions and speaker-specific-keyword models. The proposed framework admits stochastic models, representing the probability density function of the observation vectors given that a parti","authors_text":"Harshavardhan Sundar, Thippur V. Sreenivas","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2015-04-29T20:56:42Z","title":"Who Spoke What? A Latent Variable Framework for the Joint Decoding of Multiple Speakers and their Keywords"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.08021","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":"sha256:4a32db493750e8def26acb9946aa004e527a7ec9c2b7f49e7f7bb9fd2bcce1ce","target":"record","created_at":"2026-05-18T02:17:23Z","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":"ef2d25125feed6cbe20b9599657bf8cae13bec7e098da5a21b7f4ab379c5d716","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2015-04-29T20:56:42Z","title_canon_sha256":"8342ed2503fba7990309f38b4fd712e588e5967cc3e90f7e548f4f14b3a6e698"},"schema_version":"1.0","source":{"id":"1504.08021","kind":"arxiv","version":1}},"canonical_sha256":"d121519e723d0e8f69caf10481b45f5d52ce43e3ab75010e9c8657c5171202fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d121519e723d0e8f69caf10481b45f5d52ce43e3ab75010e9c8657c5171202fd","first_computed_at":"2026-05-18T02:17:23.560585Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:17:23.560585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tjWj7qaeyJZX3pLv4kdfO/Pd5rp159fgZYg35HyXIu5cZ0Dy89bsbtEj0Tdn8bonhhbVaqirDunCTdskuHB+Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:17:23.561404Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.08021","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a32db493750e8def26acb9946aa004e527a7ec9c2b7f49e7f7bb9fd2bcce1ce","sha256:529ea8430c09697a8303968a6d9a83ba100e979f78b4732b190aa8be61740e35"],"state_sha256":"dfb12e36cc0dfe202dcb763aeead4ed5cd1f935162eecc19b16e06b8b66200ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k/NnwFZEt655EA4gU2/Tv9vUIiwmHk9MYZF+oOMdZdAHpfdNPoojOWZtQ5vBj2dcZDSRX/2XReSpDQANqFOADg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T23:02:55.959856Z","bundle_sha256":"cb9066202538077c9a0c0d557e0d762383ffd93014d8abe5e79b035bb9ddfe67"}}