{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:MAUH6CFAPMNZ3UFH7YU6T4CNYX","short_pith_number":"pith:MAUH6CFA","canonical_record":{"source":{"id":"2108.08745","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-08-19T15:20:26Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"384027ae9b535322ff724327d9f92ee50a7587411c05f092eff9c43f761884f4","abstract_canon_sha256":"ab2ec270541aa9c0e5bdff540c14237f8df512c592637308d3e6ed3e6f42c9d8"},"schema_version":"1.0"},"canonical_sha256":"60287f08a07b1b9dd0a7fe29e9f04dc5f04177afc9200b8fe2d02bcb6d782567","source":{"kind":"arxiv","id":"2108.08745","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08745","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08745v1","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08745","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_12","alias_value":"MAUH6CFAPMNZ","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_16","alias_value":"MAUH6CFAPMNZ3UFH","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_8","alias_value":"MAUH6CFA","created_at":"2026-07-05T03:07:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:MAUH6CFAPMNZ3UFH7YU6T4CNYX","target":"record","payload":{"canonical_record":{"source":{"id":"2108.08745","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-08-19T15:20:26Z","cross_cats_sorted":["cs.SD"],"title_canon_sha256":"384027ae9b535322ff724327d9f92ee50a7587411c05f092eff9c43f761884f4","abstract_canon_sha256":"ab2ec270541aa9c0e5bdff540c14237f8df512c592637308d3e6ed3e6f42c9d8"},"schema_version":"1.0"},"canonical_sha256":"60287f08a07b1b9dd0a7fe29e9f04dc5f04177afc9200b8fe2d02bcb6d782567","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:07:12.970422Z","signature_b64":"Dn+aABtVUAote5d9bLtzckOykz8eormU/2M45T8r/hRJgdtEaYVA7CsC5Eci8NR2kPK4iIrww2sUig1ONZ7kBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"60287f08a07b1b9dd0a7fe29e9f04dc5f04177afc9200b8fe2d02bcb6d782567","last_reissued_at":"2026-07-05T03:07:12.969822Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:07:12.969822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.08745","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":"2026-07-05T03:07:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pNpuePnUd8qk7zGItGo90ONDdhNn7HWCI7bCnzNlRqaqW14G6geeYy7x+eVsM9DvreBBFefxdFnu5lq09dCwDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T05:28:03.605500Z"},"content_sha256":"68615e022fbd2f40cf38cab2cf172ad458614e721740bda5087d43eac2265ee7","schema_version":"1.0","event_id":"sha256:68615e022fbd2f40cf38cab2cf172ad458614e721740bda5087d43eac2265ee7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:MAUH6CFAPMNZ3UFH7YU6T4CNYX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"More for Less: Non-Intrusive Speech Quality Assessment with Limited Annotations","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.SD"],"primary_cat":"eess.AS","authors_text":"Alessandro Ragano, Andrew Hines, Emmanouil Benetos","submitted_at":"2021-08-19T15:20:26Z","abstract_excerpt":"Non-intrusive speech quality assessment is a crucial operation in multimedia applications. The scarcity of annotated data and the lack of a reference signal represent some of the main challenges for designing efficient quality assessment metrics. In this paper, we propose two multi-task models to tackle the problems above. In the first model, we first learn a feature representation with a degradation classifier on a large dataset. Then we perform MOS prediction and degradation classification simultaneously on a small dataset annotated with MOS. In the second approach, the initial stage consist"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08745","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/2108.08745/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":"2026-07-05T03:07:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+E00MC8XNH4Lg67uSmkKHUdP9c/isPKZ3kb9lojx4TXNaFAypPvcj9xueSHV5C5jRm1FZ5sZCyu7Or7/kgsgBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-17T05:28:03.621713Z"},"content_sha256":"f70fffd8664b8ec7ae4ea95ca53ccb68da96be76c35226fb3d63215c9a209fec","schema_version":"1.0","event_id":"sha256:f70fffd8664b8ec7ae4ea95ca53ccb68da96be76c35226fb3d63215c9a209fec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/bundle.json","state_url":"https://pith.science/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/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":"2026-08-17T05:28:03Z","links":{"resolver":"https://pith.science/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX","bundle":"https://pith.science/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/bundle.json","state":"https://pith.science/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MAUH6CFAPMNZ3UFH7YU6T4CNYX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:MAUH6CFAPMNZ3UFH7YU6T4CNYX","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":"ab2ec270541aa9c0e5bdff540c14237f8df512c592637308d3e6ed3e6f42c9d8","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-08-19T15:20:26Z","title_canon_sha256":"384027ae9b535322ff724327d9f92ee50a7587411c05f092eff9c43f761884f4"},"schema_version":"1.0","source":{"id":"2108.08745","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.08745","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"arxiv_version","alias_value":"2108.08745v1","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.08745","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_12","alias_value":"MAUH6CFAPMNZ","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_16","alias_value":"MAUH6CFAPMNZ3UFH","created_at":"2026-07-05T03:07:12Z"},{"alias_kind":"pith_short_8","alias_value":"MAUH6CFA","created_at":"2026-07-05T03:07:12Z"}],"graph_snapshots":[{"event_id":"sha256:f70fffd8664b8ec7ae4ea95ca53ccb68da96be76c35226fb3d63215c9a209fec","target":"graph","created_at":"2026-07-05T03:07:12Z","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/2108.08745/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Non-intrusive speech quality assessment is a crucial operation in multimedia applications. The scarcity of annotated data and the lack of a reference signal represent some of the main challenges for designing efficient quality assessment metrics. In this paper, we propose two multi-task models to tackle the problems above. In the first model, we first learn a feature representation with a degradation classifier on a large dataset. Then we perform MOS prediction and degradation classification simultaneously on a small dataset annotated with MOS. In the second approach, the initial stage consist","authors_text":"Alessandro Ragano, Andrew Hines, Emmanouil Benetos","cross_cats":["cs.SD"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-08-19T15:20:26Z","title":"More for Less: Non-Intrusive Speech Quality Assessment with Limited Annotations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.08745","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":"sha256:68615e022fbd2f40cf38cab2cf172ad458614e721740bda5087d43eac2265ee7","target":"record","created_at":"2026-07-05T03:07:12Z","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":"ab2ec270541aa9c0e5bdff540c14237f8df512c592637308d3e6ed3e6f42c9d8","cross_cats_sorted":["cs.SD"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"eess.AS","submitted_at":"2021-08-19T15:20:26Z","title_canon_sha256":"384027ae9b535322ff724327d9f92ee50a7587411c05f092eff9c43f761884f4"},"schema_version":"1.0","source":{"id":"2108.08745","kind":"arxiv","version":1}},"canonical_sha256":"60287f08a07b1b9dd0a7fe29e9f04dc5f04177afc9200b8fe2d02bcb6d782567","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60287f08a07b1b9dd0a7fe29e9f04dc5f04177afc9200b8fe2d02bcb6d782567","first_computed_at":"2026-07-05T03:07:12.969822Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:07:12.969822Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Dn+aABtVUAote5d9bLtzckOykz8eormU/2M45T8r/hRJgdtEaYVA7CsC5Eci8NR2kPK4iIrww2sUig1ONZ7kBA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:07:12.970422Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.08745","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:68615e022fbd2f40cf38cab2cf172ad458614e721740bda5087d43eac2265ee7","sha256:f70fffd8664b8ec7ae4ea95ca53ccb68da96be76c35226fb3d63215c9a209fec"],"state_sha256":"75f5ee7bf98a7911a72071404f7dbd838718e3a17b8e24619e640c2b57e67cad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RXsg0XRBoOjci/RcYprmYJ5i6Kxb5GW1si/ddEq4Z7bICil/95KF1LCBl6DVNZIu6LwTJFYNF08J9hswvhrhDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-17T05:28:03.632637Z","bundle_sha256":"4d2c95d091c16e6f7e4de4dd97717105d4849f18d4a92f0bb7f8f42a19134e47"}}