{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:4JILNNYZGV3ZQ76X5P3J2FONRW","short_pith_number":"pith:4JILNNYZ","canonical_record":{"source":{"id":"2005.01972","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-05-05T07:08:53Z","cross_cats_sorted":["cs.SD","eess.AS"],"title_canon_sha256":"4614c31f2479b14e168590df6691981f50b62e9c5f267bef0d88e82dc50bd1bc","abstract_canon_sha256":"f26ed272c8e287ecb76ca5b3967f653953987cee5f18686582af7c8b3fdbac5c"},"schema_version":"1.0"},"canonical_sha256":"e250b6b7193577987fd7ebf69d15cd8d9f37ca8d3fb85ccfac40a976fc13fce5","source":{"kind":"arxiv","id":"2005.01972","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.01972","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"arxiv_version","alias_value":"2005.01972v2","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.01972","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_12","alias_value":"4JILNNYZGV3Z","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_16","alias_value":"4JILNNYZGV3ZQ76X","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_8","alias_value":"4JILNNYZ","created_at":"2026-07-05T01:49:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:4JILNNYZGV3ZQ76X5P3J2FONRW","target":"record","payload":{"canonical_record":{"source":{"id":"2005.01972","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-05-05T07:08:53Z","cross_cats_sorted":["cs.SD","eess.AS"],"title_canon_sha256":"4614c31f2479b14e168590df6691981f50b62e9c5f267bef0d88e82dc50bd1bc","abstract_canon_sha256":"f26ed272c8e287ecb76ca5b3967f653953987cee5f18686582af7c8b3fdbac5c"},"schema_version":"1.0"},"canonical_sha256":"e250b6b7193577987fd7ebf69d15cd8d9f37ca8d3fb85ccfac40a976fc13fce5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:49:52.083600Z","signature_b64":"63xWTMKtMdovcivDQZJwGWkmtGEaeJDOmAfi+oPWDgmHbNpq+6blVkRYc+JLzrCplJtH6KoB7yqkI8C2zp/cAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e250b6b7193577987fd7ebf69d15cd8d9f37ca8d3fb85ccfac40a976fc13fce5","last_reissued_at":"2026-07-05T01:49:52.083141Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:49:52.083141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2005.01972","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":"2026-07-05T01:49:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HVSZD1Rpff2IF1QcbLdP19Nn0q31acXt9ZndLQUoZRqmScOxCcdvlwVi5Ciht0MRYgLR+ykeD+LVcfpAb7qrCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T20:43:48.704485Z"},"content_sha256":"71b485517a5d6a617925fa9846170c4c735a980b2aa7ab882af5c6321e5f8134","schema_version":"1.0","event_id":"sha256:71b485517a5d6a617925fa9846170c4c735a980b2aa7ab882af5c6321e5f8134"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:4JILNNYZGV3ZQ76X5P3J2FONRW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"End-to-end Whispered Speech Recognition with Frequency-weighted Approaches and Pseudo Whisper Pre-training","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SD","eess.AS"],"primary_cat":"cs.CL","authors_text":"Alexander H. Liu, Heng-Jui Chang, Hung-yi Lee, Lin-shan Lee","submitted_at":"2020-05-05T07:08:53Z","abstract_excerpt":"Whispering is an important mode of human speech, but no end-to-end recognition results for it were reported yet, probably due to the scarcity of available whispered speech data. In this paper, we present several approaches for end-to-end (E2E) recognition of whispered speech considering the special characteristics of whispered speech and the scarcity of data. This includes a frequency-weighted SpecAugment policy and a frequency-divided CNN feature extractor for better capturing the high-frequency structures of whispered speech, and a layer-wise transfer learning approach to pre-train a model w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.01972","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2005.01972/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":"2026-07-05T01:49:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kTXLJXTPJoFu22M3bmeAAzmtote+BxeeMSlVH87G9GT83OfR9fKff5NnpM4beeTxH2aFKNn1gbWdEF1wQ53sBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T20:43:48.704853Z"},"content_sha256":"9cbd075c2cb249411d88d7c313da75c70d0e49f61f119f0265a3dc9b3c77c5aa","schema_version":"1.0","event_id":"sha256:9cbd075c2cb249411d88d7c313da75c70d0e49f61f119f0265a3dc9b3c77c5aa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/bundle.json","state_url":"https://pith.science/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/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":"2026-07-25T20:43:48Z","links":{"resolver":"https://pith.science/pith/4JILNNYZGV3ZQ76X5P3J2FONRW","bundle":"https://pith.science/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/bundle.json","state":"https://pith.science/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4JILNNYZGV3ZQ76X5P3J2FONRW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:4JILNNYZGV3ZQ76X5P3J2FONRW","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":"f26ed272c8e287ecb76ca5b3967f653953987cee5f18686582af7c8b3fdbac5c","cross_cats_sorted":["cs.SD","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-05-05T07:08:53Z","title_canon_sha256":"4614c31f2479b14e168590df6691981f50b62e9c5f267bef0d88e82dc50bd1bc"},"schema_version":"1.0","source":{"id":"2005.01972","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2005.01972","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"arxiv_version","alias_value":"2005.01972v2","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2005.01972","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_12","alias_value":"4JILNNYZGV3Z","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_16","alias_value":"4JILNNYZGV3ZQ76X","created_at":"2026-07-05T01:49:52Z"},{"alias_kind":"pith_short_8","alias_value":"4JILNNYZ","created_at":"2026-07-05T01:49:52Z"}],"graph_snapshots":[{"event_id":"sha256:9cbd075c2cb249411d88d7c313da75c70d0e49f61f119f0265a3dc9b3c77c5aa","target":"graph","created_at":"2026-07-05T01:49:52Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2005.01972/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Whispering is an important mode of human speech, but no end-to-end recognition results for it were reported yet, probably due to the scarcity of available whispered speech data. In this paper, we present several approaches for end-to-end (E2E) recognition of whispered speech considering the special characteristics of whispered speech and the scarcity of data. This includes a frequency-weighted SpecAugment policy and a frequency-divided CNN feature extractor for better capturing the high-frequency structures of whispered speech, and a layer-wise transfer learning approach to pre-train a model w","authors_text":"Alexander H. Liu, Heng-Jui Chang, Hung-yi Lee, Lin-shan Lee","cross_cats":["cs.SD","eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-05-05T07:08:53Z","title":"End-to-end Whispered Speech Recognition with Frequency-weighted Approaches and Pseudo Whisper Pre-training"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2005.01972","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":"sha256:71b485517a5d6a617925fa9846170c4c735a980b2aa7ab882af5c6321e5f8134","target":"record","created_at":"2026-07-05T01:49:52Z","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":"f26ed272c8e287ecb76ca5b3967f653953987cee5f18686582af7c8b3fdbac5c","cross_cats_sorted":["cs.SD","eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CL","submitted_at":"2020-05-05T07:08:53Z","title_canon_sha256":"4614c31f2479b14e168590df6691981f50b62e9c5f267bef0d88e82dc50bd1bc"},"schema_version":"1.0","source":{"id":"2005.01972","kind":"arxiv","version":2}},"canonical_sha256":"e250b6b7193577987fd7ebf69d15cd8d9f37ca8d3fb85ccfac40a976fc13fce5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e250b6b7193577987fd7ebf69d15cd8d9f37ca8d3fb85ccfac40a976fc13fce5","first_computed_at":"2026-07-05T01:49:52.083141Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:49:52.083141Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"63xWTMKtMdovcivDQZJwGWkmtGEaeJDOmAfi+oPWDgmHbNpq+6blVkRYc+JLzrCplJtH6KoB7yqkI8C2zp/cAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:49:52.083600Z","signed_message":"canonical_sha256_bytes"},"source_id":"2005.01972","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71b485517a5d6a617925fa9846170c4c735a980b2aa7ab882af5c6321e5f8134","sha256:9cbd075c2cb249411d88d7c313da75c70d0e49f61f119f0265a3dc9b3c77c5aa"],"state_sha256":"807f147b6785d035c86ec5a88765f2c0db7e14efe495bf8d56656e3ff88710f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5+vmokLxwIhrvPilt+77STM7sV/mg7RErlGJNvDPb/CY4UAmn2XdYDmPoOgJFr34HZ69fsFLvwSd6z4wAUFTCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T20:43:48.706999Z","bundle_sha256":"5709a37a097afe745e7e15727cabebd1ab5673a6fd0ff6f5a676bbf118f10fc6"}}