{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:B3Z44BA6E2VCWPXILEZGK2NTTF","short_pith_number":"pith:B3Z44BA6","canonical_record":{"source":{"id":"2002.04502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-02-11T16:02:43Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"b4850f9f6472bae2fa507450dd02e4496761e2d42c046688cfa7ca92812eb58d","abstract_canon_sha256":"547d54b56f616f27c1f53d487bbcd6c7e412bd201091c5a3a1a3e0d8857304bf"},"schema_version":"1.0"},"canonical_sha256":"0ef3ce041e26aa2b3ee859326569b3995851a53c4e0356a07e634a5f631c1265","source":{"kind":"arxiv","id":"2002.04502","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.04502","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"arxiv_version","alias_value":"2002.04502v1","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.04502","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_12","alias_value":"B3Z44BA6E2VC","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_16","alias_value":"B3Z44BA6E2VCWPXI","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_8","alias_value":"B3Z44BA6","created_at":"2026-07-05T00:39:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:B3Z44BA6E2VCWPXILEZGK2NTTF","target":"record","payload":{"canonical_record":{"source":{"id":"2002.04502","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-02-11T16:02:43Z","cross_cats_sorted":["eess.AS"],"title_canon_sha256":"b4850f9f6472bae2fa507450dd02e4496761e2d42c046688cfa7ca92812eb58d","abstract_canon_sha256":"547d54b56f616f27c1f53d487bbcd6c7e412bd201091c5a3a1a3e0d8857304bf"},"schema_version":"1.0"},"canonical_sha256":"0ef3ce041e26aa2b3ee859326569b3995851a53c4e0356a07e634a5f631c1265","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:39:45.930531Z","signature_b64":"ZlI0i4LmcHHbJsmSS6sUntABswskrOwSZaEw1Ki8lty2l6lk38JJ1W7Tx+8w0NWUo5hpERgO3qGcFz/icqGcCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0ef3ce041e26aa2b3ee859326569b3995851a53c4e0356a07e634a5f631c1265","last_reissued_at":"2026-07-05T00:39:45.930194Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:39:45.930194Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.04502","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":"2026-07-05T00:39:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oldflO54Qo2DtfnbSqGmHTcFiVjrDuBLRXlZo1Az5EHMGZg0BCDS/jP+QkHX4FABuwm8B1ohR5VorFt3xH6YBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:50:55.351277Z"},"content_sha256":"f7346e8c7a3f089bd5cd3548d28a55fda32e54c49f1d5a9b5f9225fd03ba178b","schema_version":"1.0","event_id":"sha256:f7346e8c7a3f089bd5cd3548d28a55fda32e54c49f1d5a9b5f9225fd03ba178b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:B3Z44BA6E2VCWPXILEZGK2NTTF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Robust Acoustic Scene Classification using a Multi-Spectrogram Encoder-Decoder Framework","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.AS"],"primary_cat":"cs.SD","authors_text":"Alfred Mertins, Huy Phan, Ian McLoughlin, Lam Pham, Ramaswamy Palaniappan, Truc Nguyen","submitted_at":"2020-02-11T16:02:43Z","abstract_excerpt":"This article proposes an encoder-decoder network model for Acoustic Scene Classification (ASC), the task of identifying the scene of an audio recording from its acoustic signature. We make use of multiple low-level spectrogram features at the front-end, transformed into higher level features through a well-trained CNN-DNN front-end encoder. The high level features and their combination (via a trained feature combiner) are then fed into different decoder models comprising random forest regression, DNNs and a mixture of experts, for back-end classification. We report extensive experiments to eva"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.04502","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/2002.04502/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":"2026-07-05T00:39:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n9EYWoplgKkUh8UZYZhgBQgaKNP4GJFbV018m/WFstgWvmZ9TMIkNVFche+9zFe5OJepc0eMzQo4JjxCcqGhDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:50:55.351825Z"},"content_sha256":"0080e3d200db60868bb377a57926416d8bfb7a6979c94a5f8709ea5442f73263","schema_version":"1.0","event_id":"sha256:0080e3d200db60868bb377a57926416d8bfb7a6979c94a5f8709ea5442f73263"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/bundle.json","state_url":"https://pith.science/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/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":"2026-08-06T09:50:55Z","links":{"resolver":"https://pith.science/pith/B3Z44BA6E2VCWPXILEZGK2NTTF","bundle":"https://pith.science/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/bundle.json","state":"https://pith.science/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/B3Z44BA6E2VCWPXILEZGK2NTTF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:B3Z44BA6E2VCWPXILEZGK2NTTF","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":"547d54b56f616f27c1f53d487bbcd6c7e412bd201091c5a3a1a3e0d8857304bf","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-02-11T16:02:43Z","title_canon_sha256":"b4850f9f6472bae2fa507450dd02e4496761e2d42c046688cfa7ca92812eb58d"},"schema_version":"1.0","source":{"id":"2002.04502","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.04502","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"arxiv_version","alias_value":"2002.04502v1","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.04502","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_12","alias_value":"B3Z44BA6E2VC","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_16","alias_value":"B3Z44BA6E2VCWPXI","created_at":"2026-07-05T00:39:45Z"},{"alias_kind":"pith_short_8","alias_value":"B3Z44BA6","created_at":"2026-07-05T00:39:45Z"}],"graph_snapshots":[{"event_id":"sha256:0080e3d200db60868bb377a57926416d8bfb7a6979c94a5f8709ea5442f73263","target":"graph","created_at":"2026-07-05T00:39:45Z","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/2002.04502/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This article proposes an encoder-decoder network model for Acoustic Scene Classification (ASC), the task of identifying the scene of an audio recording from its acoustic signature. We make use of multiple low-level spectrogram features at the front-end, transformed into higher level features through a well-trained CNN-DNN front-end encoder. The high level features and their combination (via a trained feature combiner) are then fed into different decoder models comprising random forest regression, DNNs and a mixture of experts, for back-end classification. We report extensive experiments to eva","authors_text":"Alfred Mertins, Huy Phan, Ian McLoughlin, Lam Pham, Ramaswamy Palaniappan, Truc Nguyen","cross_cats":["eess.AS"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-02-11T16:02:43Z","title":"Robust Acoustic Scene Classification using a Multi-Spectrogram Encoder-Decoder Framework"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.04502","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:f7346e8c7a3f089bd5cd3548d28a55fda32e54c49f1d5a9b5f9225fd03ba178b","target":"record","created_at":"2026-07-05T00:39:45Z","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":"547d54b56f616f27c1f53d487bbcd6c7e412bd201091c5a3a1a3e0d8857304bf","cross_cats_sorted":["eess.AS"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.SD","submitted_at":"2020-02-11T16:02:43Z","title_canon_sha256":"b4850f9f6472bae2fa507450dd02e4496761e2d42c046688cfa7ca92812eb58d"},"schema_version":"1.0","source":{"id":"2002.04502","kind":"arxiv","version":1}},"canonical_sha256":"0ef3ce041e26aa2b3ee859326569b3995851a53c4e0356a07e634a5f631c1265","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0ef3ce041e26aa2b3ee859326569b3995851a53c4e0356a07e634a5f631c1265","first_computed_at":"2026-07-05T00:39:45.930194Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:39:45.930194Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZlI0i4LmcHHbJsmSS6sUntABswskrOwSZaEw1Ki8lty2l6lk38JJ1W7Tx+8w0NWUo5hpERgO3qGcFz/icqGcCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:39:45.930531Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.04502","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7346e8c7a3f089bd5cd3548d28a55fda32e54c49f1d5a9b5f9225fd03ba178b","sha256:0080e3d200db60868bb377a57926416d8bfb7a6979c94a5f8709ea5442f73263"],"state_sha256":"bf17be3bc575333d7947e52afb37a1f549786eae35be565d1c7e939975255ae7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2D9wnA69xAGCy+a2Sv9iF0H3YD8996BAFjTLh6adg3CxtBTvP5F6Ec1LOQGpOq+pBBslVirdzl4ACY46n1xRBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T09:50:55.356819Z","bundle_sha256":"065e4010e542d24614779d9b1d3e775a80645fe7110d15a255c2e98aa379c647"}}