{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:B46J6RDAK75CZ2BPESOHXYDGC4","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":"abd1b159450c864a9d070f2af06e16e86d2fd2b823059196bcb45b295aee1ff6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-05T06:41:10Z","title_canon_sha256":"2e042fccd72a869e5584fb052dfe874065d4c0cb17f1a53d397b59eb2a6d44e9"},"schema_version":"1.0","source":{"id":"2606.06962","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.06962","created_at":"2026-06-08T01:04:38Z"},{"alias_kind":"arxiv_version","alias_value":"2606.06962v1","created_at":"2026-06-08T01:04:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.06962","created_at":"2026-06-08T01:04:38Z"},{"alias_kind":"pith_short_12","alias_value":"B46J6RDAK75C","created_at":"2026-06-08T01:04:38Z"},{"alias_kind":"pith_short_16","alias_value":"B46J6RDAK75CZ2BP","created_at":"2026-06-08T01:04:38Z"},{"alias_kind":"pith_short_8","alias_value":"B46J6RDA","created_at":"2026-06-08T01:04:38Z"}],"graph_snapshots":[{"event_id":"sha256:beefb8bd0eb04e37f80f29de015e23ce9961571703ffc9edc507d0156c05afcf","target":"graph","created_at":"2026-06-08T01:04:38Z","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/2606.06962/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Speech bandwidth extension (BWE) aims to reconstruct high-fidelity wideband audio from narrowband inputs. While recent approaches have made significant progress, they often struggle to reconstruct realistic high-frequency phase and harmonic structures, leading to perceptual artifacts. In this paper, we propose FSC-Net (Full-Spectrum Context Network), a parameter-efficient architecture designed to explicitly model cross-band harmonic dependencies. By integrating Fast Fourier Convolutions (FFCs) into a complex spectral mapping framework, FSC-Net expands its receptive field to the entire spectrum","authors_text":"Jing Lu, Kai Chen, Qinwen Hu, Xiaobin Rong, Xinan Chen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-05T06:41:10Z","title":"FSC-Net: Integrating Fast Fourier Convolutions and Progressive Learning for Speech Bandwidth Extension"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.06962","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":"sha256:205f01ba6eb5e42e54936b55835d790c547b159008827f77475ee6bcae380dd7","target":"record","created_at":"2026-06-08T01:04:38Z","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":"abd1b159450c864a9d070f2af06e16e86d2fd2b823059196bcb45b295aee1ff6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.AS","submitted_at":"2026-06-05T06:41:10Z","title_canon_sha256":"2e042fccd72a869e5584fb052dfe874065d4c0cb17f1a53d397b59eb2a6d44e9"},"schema_version":"1.0","source":{"id":"2606.06962","kind":"arxiv","version":1}},"canonical_sha256":"0f3c9f446057fa2ce82f249c7be066173013ec32584b5e14785f2900a805c4f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0f3c9f446057fa2ce82f249c7be066173013ec32584b5e14785f2900a805c4f5","first_computed_at":"2026-06-08T01:04:38.383088Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-08T01:04:38.383088Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XiDvCOTp4OmXYPrbt7DCoilptrGGpBUQ4LsW1Il8SEV+Akt2pNIPhBjqKMOIALJAm1+btx/w+TSTIFBW+dwQCg==","signature_status":"signed_v1","signed_at":"2026-06-08T01:04:38.383869Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.06962","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:205f01ba6eb5e42e54936b55835d790c547b159008827f77475ee6bcae380dd7","sha256:beefb8bd0eb04e37f80f29de015e23ce9961571703ffc9edc507d0156c05afcf"],"state_sha256":"7356c4e35b0e6723afedaeb25ceb69423960a0f8a2780f2316edef4fc77c511a"}