{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:IT3N7G2WWZPU5NPEDBQUG47ZJH","short_pith_number":"pith:IT3N7G2W","canonical_record":{"source":{"id":"2305.18802","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.AS","submitted_at":"2023-05-30T07:30:21Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"0ec69e49c0b8eda80ac5420b321eae52abdf6c120f7eb50ea7219050947375d3","abstract_canon_sha256":"7e6847900d45d7a2628caa5e240a1ad01bb532f3982adc247fca200952ec63d0"},"schema_version":"1.0"},"canonical_sha256":"44f6df9b56b65f4eb5e418614373f949c98aeb0f86ad7751e98b7600af97c4b2","source":{"kind":"arxiv","id":"2305.18802","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.18802","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"2305.18802v1","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.18802","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"IT3N7G2WWZPU","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_16","alias_value":"IT3N7G2WWZPU5NPE","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_8","alias_value":"IT3N7G2W","created_at":"2026-07-05T06:15:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:IT3N7G2WWZPU5NPEDBQUG47ZJH","target":"record","payload":{"canonical_record":{"source":{"id":"2305.18802","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.AS","submitted_at":"2023-05-30T07:30:21Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"0ec69e49c0b8eda80ac5420b321eae52abdf6c120f7eb50ea7219050947375d3","abstract_canon_sha256":"7e6847900d45d7a2628caa5e240a1ad01bb532f3982adc247fca200952ec63d0"},"schema_version":"1.0"},"canonical_sha256":"44f6df9b56b65f4eb5e418614373f949c98aeb0f86ad7751e98b7600af97c4b2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:15:05.058161Z","signature_b64":"mSQIG18lG/SrXR5ZX/e6dmoC7SfNXbjunAcaZuN7lqhnr3RJ+PXnR2lxavO4AvmmXwt5IMRJIZRMl0izMMxjCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44f6df9b56b65f4eb5e418614373f949c98aeb0f86ad7751e98b7600af97c4b2","last_reissued_at":"2026-07-05T06:15:05.057739Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:15:05.057739Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2305.18802","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":"2026-07-05T06:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R8LDrgJa8H1K07ppInHG5axDezp1knUUZc47+2vQOpt04LLJMzSoqoTYsKIJFufgNZbirUsM2zLhrNFt9U4UCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T00:15:00.021427Z"},"content_sha256":"8e84f03a49bf252c8ca65a072375f9897443584c4860607ec0522f864a2cb6a4","schema_version":"1.0","event_id":"sha256:8e84f03a49bf252c8ca65a072375f9897443584c4860607ec0522f864a2cb6a4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:IT3N7G2WWZPU5NPEDBQUG47ZJH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"LibriTTS-R: A Restored Multi-Speaker Text-to-Speech Corpus","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"Ankur Bapna, Heiga Zen, Kohei Yatabe, Michiel Bacchiani, Nobuyuki Morioka, Shigeki Karita, Wei Han, Yifan Ding, Yuma Koizumi, Yu Zhang","submitted_at":"2023-05-30T07:30:21Z","abstract_excerpt":"This paper introduces a new speech dataset called ``LibriTTS-R'' designed for text-to-speech (TTS) use. It is derived by applying speech restoration to the LibriTTS corpus, which consists of 585 hours of speech data at 24 kHz sampling rate from 2,456 speakers and the corresponding texts. The constituent samples of LibriTTS-R are identical to those of LibriTTS, with only the sound quality improved. Experimental results show that the LibriTTS-R ground-truth samples showed significantly improved sound quality compared to those in LibriTTS. In addition, neural end-to-end TTS trained with LibriTTS-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.18802","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/2305.18802/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":"2026-07-05T06:15:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nBrsKHqAa5aVkXzyZmBbeY0S7vShQ9Kzx/UiTlV5R59LTvY97k2+MCxlX7l4SlXH/2rdxLAdQD+zLAy9ptsoCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-09T00:15:00.022515Z"},"content_sha256":"bc557d152710c87541b0caaa4eb398cdd835523a78127328b5bd44ad23f28ecc","schema_version":"1.0","event_id":"sha256:bc557d152710c87541b0caaa4eb398cdd835523a78127328b5bd44ad23f28ecc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/bundle.json","state_url":"https://pith.science/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/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":"2026-08-09T00:15:00Z","links":{"resolver":"https://pith.science/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH","bundle":"https://pith.science/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/bundle.json","state":"https://pith.science/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IT3N7G2WWZPU5NPEDBQUG47ZJH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:IT3N7G2WWZPU5NPEDBQUG47ZJH","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":"7e6847900d45d7a2628caa5e240a1ad01bb532f3982adc247fca200952ec63d0","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.AS","submitted_at":"2023-05-30T07:30:21Z","title_canon_sha256":"0ec69e49c0b8eda80ac5420b321eae52abdf6c120f7eb50ea7219050947375d3"},"schema_version":"1.0","source":{"id":"2305.18802","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2305.18802","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"arxiv_version","alias_value":"2305.18802v1","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2305.18802","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_12","alias_value":"IT3N7G2WWZPU","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_16","alias_value":"IT3N7G2WWZPU5NPE","created_at":"2026-07-05T06:15:05Z"},{"alias_kind":"pith_short_8","alias_value":"IT3N7G2W","created_at":"2026-07-05T06:15:05Z"}],"graph_snapshots":[{"event_id":"sha256:bc557d152710c87541b0caaa4eb398cdd835523a78127328b5bd44ad23f28ecc","target":"graph","created_at":"2026-07-05T06:15:05Z","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/2305.18802/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper introduces a new speech dataset called ``LibriTTS-R'' designed for text-to-speech (TTS) use. It is derived by applying speech restoration to the LibriTTS corpus, which consists of 585 hours of speech data at 24 kHz sampling rate from 2,456 speakers and the corresponding texts. The constituent samples of LibriTTS-R are identical to those of LibriTTS, with only the sound quality improved. Experimental results show that the LibriTTS-R ground-truth samples showed significantly improved sound quality compared to those in LibriTTS. In addition, neural end-to-end TTS trained with LibriTTS-","authors_text":"Ankur Bapna, Heiga Zen, Kohei Yatabe, Michiel Bacchiani, Nobuyuki Morioka, Shigeki Karita, Wei Han, Yifan Ding, Yuma Koizumi, Yu Zhang","cross_cats":["cs.SD"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.AS","submitted_at":"2023-05-30T07:30:21Z","title":"LibriTTS-R: A Restored Multi-Speaker Text-to-Speech Corpus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2305.18802","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":"sha256:8e84f03a49bf252c8ca65a072375f9897443584c4860607ec0522f864a2cb6a4","target":"record","created_at":"2026-07-05T06:15:05Z","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":"7e6847900d45d7a2628caa5e240a1ad01bb532f3982adc247fca200952ec63d0","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"eess.AS","submitted_at":"2023-05-30T07:30:21Z","title_canon_sha256":"0ec69e49c0b8eda80ac5420b321eae52abdf6c120f7eb50ea7219050947375d3"},"schema_version":"1.0","source":{"id":"2305.18802","kind":"arxiv","version":1}},"canonical_sha256":"44f6df9b56b65f4eb5e418614373f949c98aeb0f86ad7751e98b7600af97c4b2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"44f6df9b56b65f4eb5e418614373f949c98aeb0f86ad7751e98b7600af97c4b2","first_computed_at":"2026-07-05T06:15:05.057739Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:15:05.057739Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mSQIG18lG/SrXR5ZX/e6dmoC7SfNXbjunAcaZuN7lqhnr3RJ+PXnR2lxavO4AvmmXwt5IMRJIZRMl0izMMxjCg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:15:05.058161Z","signed_message":"canonical_sha256_bytes"},"source_id":"2305.18802","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8e84f03a49bf252c8ca65a072375f9897443584c4860607ec0522f864a2cb6a4","sha256:bc557d152710c87541b0caaa4eb398cdd835523a78127328b5bd44ad23f28ecc"],"state_sha256":"fb837c60fc5b306d660344622764dc2052d43754348b1d98f898598cf4e6a5a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i6ip5sZb61AdOo9qKnktNMNTjNL8DRQu4/oNyr7QSYca0kYTF8k8InAhA5Jg3Q41Js2YuajuleHmoPj2kTmiBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-09T00:15:00.029376Z","bundle_sha256":"fc87f2d79ec517cac90b155a8b4506bf49506c2e3b8e19198c66f9262edbccf1"}}