{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:V7WICU465A2PPVCZQNMVUNUXNR","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":"7cb6bdc1ee6a20a792c88ae8eca4df563707b241d2f8b3ec22e3e98b3babf8f1","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-10-29T15:27:08Z","title_canon_sha256":"f0a4c0b9e2cc64f328d35d783531b674abef5101c1748493bf20ee9a619b31c2"},"schema_version":"1.0","source":{"id":"1610.09530","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.09530","created_at":"2026-05-18T00:40:17Z"},{"alias_kind":"arxiv_version","alias_value":"1610.09530v2","created_at":"2026-05-18T00:40:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.09530","created_at":"2026-05-18T00:40:17Z"},{"alias_kind":"pith_short_12","alias_value":"V7WICU465A2P","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"V7WICU465A2PPVCZ","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"V7WICU46","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:16235d794ce0d4614c449bc6f4d20b057520b2f9eaadd4d544a7f5e7b4c4d362","target":"graph","created_at":"2026-05-18T00:40:17Z","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":"In this paper, we consider multi-quality multicast beamforming of a video stream from a multi-antenna base station (BS) to multiple single-antenna users receiving different qualities of the same video stream, via scalable video coding (SVC). Leveraging the layered structure of SVC and exploiting superposition coding (SC) as well as successive interference cancelation (SIC), we propose a layer-based multi-quality multicast beamforming scheme. To reduce the complexity, we also propose a quality-based multi-quality multicast beamforming scheme, which further utilizes the layered structure of SVC ","authors_text":"Chengjun Guo, Derrick Wing Kwan Ng, Ying Cui, Zhi Liu","cross_cats":["math.IT"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-10-29T15:27:08Z","title":"Multi-Quality Multicast Beamforming based on Scalable Video Coding"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.09530","kind":"arxiv","version":2},"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":"sha256:4fae1159f93ce47f7c1ffac484809ed11eadfba07dda4142b1e8e7577e2e88f7","target":"record","created_at":"2026-05-18T00:40:17Z","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":"7cb6bdc1ee6a20a792c88ae8eca4df563707b241d2f8b3ec22e3e98b3babf8f1","cross_cats_sorted":["math.IT"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.IT","submitted_at":"2016-10-29T15:27:08Z","title_canon_sha256":"f0a4c0b9e2cc64f328d35d783531b674abef5101c1748493bf20ee9a619b31c2"},"schema_version":"1.0","source":{"id":"1610.09530","kind":"arxiv","version":2}},"canonical_sha256":"afec81539ee834f7d45983595a36976c702c0695108a8e7123ef1b2b637ca52a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"afec81539ee834f7d45983595a36976c702c0695108a8e7123ef1b2b637ca52a","first_computed_at":"2026-05-18T00:40:17.452863Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:40:17.452863Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VOAhhimteInnmyY9Hsd1s0Y/kvAR6d9knOLUWIKBS1tALJr4eypggjHiiOz/YPFinLYnHZrrL9bJLrzkc97YDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:40:17.453606Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.09530","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4fae1159f93ce47f7c1ffac484809ed11eadfba07dda4142b1e8e7577e2e88f7","sha256:16235d794ce0d4614c449bc6f4d20b057520b2f9eaadd4d544a7f5e7b4c4d362"],"state_sha256":"9848c0799d696593255a9a74f2eadef96606a8bee0a6666c69046dc63f751eaf"}