{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:MA5A7TNVHSLLFZXDQAMED5PXV7","short_pith_number":"pith:MA5A7TNV","canonical_record":{"source":{"id":"1907.07269","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-07-16T21:32:10Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"22d9856dbaa50200aa5fdcbf147567c4b161a82864a63fb33d909974d0e8515f","abstract_canon_sha256":"f7741550da792e6117bec31409a83d3f9c320386e31a86a3355f0cbc14ac1b30"},"schema_version":"1.0"},"canonical_sha256":"603a0fcdb53c96b2e6e3801841f5f7aff84e72df5a5fd503e96d9dbeed30adb7","source":{"kind":"arxiv","id":"1907.07269","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07269","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07269v1","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07269","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"pith_short_12","alias_value":"MA5A7TNVHSLL","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"MA5A7TNVHSLLFZXD","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"MA5A7TNV","created_at":"2026-05-18T12:33:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:MA5A7TNVHSLLFZXDQAMED5PXV7","target":"record","payload":{"canonical_record":{"source":{"id":"1907.07269","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-07-16T21:32:10Z","cross_cats_sorted":["math.IT"],"title_canon_sha256":"22d9856dbaa50200aa5fdcbf147567c4b161a82864a63fb33d909974d0e8515f","abstract_canon_sha256":"f7741550da792e6117bec31409a83d3f9c320386e31a86a3355f0cbc14ac1b30"},"schema_version":"1.0"},"canonical_sha256":"603a0fcdb53c96b2e6e3801841f5f7aff84e72df5a5fd503e96d9dbeed30adb7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:40:08.425386Z","signature_b64":"vdzNNsmgYxfG0QRT4OY0pu/AtsSY1TooI0CkNJ19RbgoxXO7/2+QevNih46xhqHZBHQNZ1NmqD4yKnbpF7/pAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"603a0fcdb53c96b2e6e3801841f5f7aff84e72df5a5fd503e96d9dbeed30adb7","last_reissued_at":"2026-05-17T23:40:08.424501Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:40:08.424501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1907.07269","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":"2026-05-17T23:40:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A+O2y99lJX1g6VFaiWfMaNcTRiPV7TqVD7IdVTiQ+GGQ3US3rTtckq42SfJ/monBvebYPhw6zn+M3MHbTX9iDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:06:49.010510Z"},"content_sha256":"83fea57f3b4cc7feda51ab24faf99551ead5ddf4311480a4234bc23dfe3fe8d4","schema_version":"1.0","event_id":"sha256:83fea57f3b4cc7feda51ab24faf99551ead5ddf4311480a4234bc23dfe3fe8d4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:MA5A7TNVHSLLFZXDQAMED5PXV7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Scalar Quantizer Design for Two-Way Channels","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.IT"],"primary_cat":"cs.IT","authors_text":"Fady Alajaji, Saeed Rezazadeh, Wai-Yip Chan","submitted_at":"2019-07-16T21:32:10Z","abstract_excerpt":"The problem of lossy transmission of correlated sources over memoryless two-way channels (TWCs) is considered. The objective is to develop a robust low delay and low complexity source-channel coding scheme without using error correction. A simple full-duplex channel optimized scalar quantization (COSQ) scheme that implicitly mitigates TWC interference is designed. Numerical results for sending Gaussian bivariate sources over binary additive-noise TWCs with either additive or multiplicative user interference show that, in terms of signal-to-distortion ratio performance, the proposed full-duplex"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07269","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":""},"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":"2026-05-17T23:40:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5/eCupKALWy3SHeH3wyFnSgdYXf66s1Sh1ULhKqOGkGWP1ApujKftaq9DMSMKh/rWrg7yUqcKRamgeMoZHqNDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-12T00:06:49.011142Z"},"content_sha256":"fa037d40b3207f9e63f4a23aedcf221759217faa00c0d5094d6b1d994a4d575c","schema_version":"1.0","event_id":"sha256:fa037d40b3207f9e63f4a23aedcf221759217faa00c0d5094d6b1d994a4d575c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/bundle.json","state_url":"https://pith.science/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/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":"2026-06-12T00:06:49Z","links":{"resolver":"https://pith.science/pith/MA5A7TNVHSLLFZXDQAMED5PXV7","bundle":"https://pith.science/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/bundle.json","state":"https://pith.science/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MA5A7TNVHSLLFZXDQAMED5PXV7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MA5A7TNVHSLLFZXDQAMED5PXV7","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":"f7741550da792e6117bec31409a83d3f9c320386e31a86a3355f0cbc14ac1b30","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-07-16T21:32:10Z","title_canon_sha256":"22d9856dbaa50200aa5fdcbf147567c4b161a82864a63fb33d909974d0e8515f"},"schema_version":"1.0","source":{"id":"1907.07269","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1907.07269","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"arxiv_version","alias_value":"1907.07269v1","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.07269","created_at":"2026-05-17T23:40:08Z"},{"alias_kind":"pith_short_12","alias_value":"MA5A7TNVHSLL","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"MA5A7TNVHSLLFZXD","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"MA5A7TNV","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:fa037d40b3207f9e63f4a23aedcf221759217faa00c0d5094d6b1d994a4d575c","target":"graph","created_at":"2026-05-17T23:40:08Z","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"},"paper":{"abstract_excerpt":"The problem of lossy transmission of correlated sources over memoryless two-way channels (TWCs) is considered. The objective is to develop a robust low delay and low complexity source-channel coding scheme without using error correction. A simple full-duplex channel optimized scalar quantization (COSQ) scheme that implicitly mitigates TWC interference is designed. Numerical results for sending Gaussian bivariate sources over binary additive-noise TWCs with either additive or multiplicative user interference show that, in terms of signal-to-distortion ratio performance, the proposed full-duplex","authors_text":"Fady Alajaji, Saeed Rezazadeh, Wai-Yip Chan","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-07-16T21:32:10Z","title":"Scalar Quantizer Design for Two-Way Channels"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.07269","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":"sha256:83fea57f3b4cc7feda51ab24faf99551ead5ddf4311480a4234bc23dfe3fe8d4","target":"record","created_at":"2026-05-17T23:40:08Z","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":"f7741550da792e6117bec31409a83d3f9c320386e31a86a3355f0cbc14ac1b30","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2019-07-16T21:32:10Z","title_canon_sha256":"22d9856dbaa50200aa5fdcbf147567c4b161a82864a63fb33d909974d0e8515f"},"schema_version":"1.0","source":{"id":"1907.07269","kind":"arxiv","version":1}},"canonical_sha256":"603a0fcdb53c96b2e6e3801841f5f7aff84e72df5a5fd503e96d9dbeed30adb7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"603a0fcdb53c96b2e6e3801841f5f7aff84e72df5a5fd503e96d9dbeed30adb7","first_computed_at":"2026-05-17T23:40:08.424501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:40:08.424501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vdzNNsmgYxfG0QRT4OY0pu/AtsSY1TooI0CkNJ19RbgoxXO7/2+QevNih46xhqHZBHQNZ1NmqD4yKnbpF7/pAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:40:08.425386Z","signed_message":"canonical_sha256_bytes"},"source_id":"1907.07269","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:83fea57f3b4cc7feda51ab24faf99551ead5ddf4311480a4234bc23dfe3fe8d4","sha256:fa037d40b3207f9e63f4a23aedcf221759217faa00c0d5094d6b1d994a4d575c"],"state_sha256":"89809cd7e871bdebd688a3353eaa65747454c60959a76b3c98f199684ae3e6e0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wqKYpOPjl5dAv2GjNPlwo11Z1gWZ7CeTBsCiFjjs8zrLuBSeqslblMbPgUDNQwyiOxtOaqwBSz2fTwheDedHAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-12T00:06:49.014840Z","bundle_sha256":"4b1e1d5c1795d109fec0f7b23f07fb0c8a584f3666b3b6d808f5a10e7e4659a8"}}