{ "$schema": "/api/schemas/documents.schema.json", "apiVersion": "1.0.0", "generatedAt": "2026-07-09T21:16:49.031Z", "sourcePath": "src/main/data/docs", "docId": "10.5594-J06442", "document": { "abbrevTitle": "SMPTE J", "abbrevTitle$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "abstract": "With the inception of broadcast equipment incorporating bit-rate reduction techniques, concern is being voiced by some broadcasters on the cumulative effects of cascading compression codecs of different types. Compression can now be found in all parts of the broadcast chain, from acquisition, contribution, processing, recording, and distribution. Subjective viewing can give an overall assessment of perceived picture quality but may not indicate the quantitative levels of distortion that could later affect post-production, or the susceptibility to gross errors if the signal is subsequently passed through further compression. This paper discusses conventional and new subjective and objective assessment methods with the aim of providing background information for seminar discussion. Some tentative proposals are put forward for objective evaluation together with initial observations when concatenating codecs of similar and different types.", "abstract$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "authors": [ { "affiliation": "Independent Television Association (ITV), London, England, SE1 9LT.", "bio": "Chris J. Dalton graduated from Bristol University (U. K.) with a doctorate in electrical engineering and has been associated with broadcasting since that time. He worked for 18 years at the BBC's Research and Design Departments prior to joining Questech Ltd. as technical director. In 1982 he moved back to broadcasting with the Independent Television Association, where he is now head of development at the ITV Network Technology Centre, located at the London TV Centre. Dalton is an acknowledged expert in colorimetry and the composite PAL system, and he has been closely linked with a number of pioneering developments in digital studio systems. Currently he is concerned with new broadcast systems and standards, particularly extended and high-definition television and digital broadcast systems. Dalton participates in a number of interenational acitivities with the European Broadcasting Union (EBU) and International Telecommunications Union (ITU). He is a member of the IEE, a Fellow of the Royal Television Society (RTS), and a recently elected Fellow of the SMPTE. He has been recognized with awards from the RTS and IEE.", "name": "Chris J. Dalton" } ], "authors$meta": { "confidence": "high", "note": "Object form (schema 2.3.0) migrated from string form via migrateAuthorsToObjectForm.js; bio/affiliation backfilled from _source/SMPTE/HIGHWIRE/ NLM ++", "source": "parsed", "updated": "2026-06-23T00:04:25.562Z", "version": "authors-migrate-object-form@v1" }, "contentType": "orig-research", "contentType$meta": { "confidence": "high", "note": "Cross-filled from SMPTE canonical repository import (smpte-canonical-audit/canonicalLibrary.*.json); previous value was a placeholder", "originalValue": "other", "source": "parsed", "updated": "2026-07-07T23:39:31.295Z", "version": "smpte-canonical-repo@v1" }, "copyright": { "holder": "Society of Motion Picture and Television Engineers, Inc.", "holder$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "year": "1996", "year$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "copyright$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docId": "10.5594-J06442", "docId$meta": { "confidence": "high", "note": "Derived from DOI 10.5594/J06442", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docLabel": "SMPTE Journal ( Volume: 105, Issue: 11, November 1996)", "docLabel$meta": { "confidence": "medium", "note": "Composed from journal title, volume, issue and date", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docTitle": "Objective Assessment of Single and Concatenated Compression Codecs", "docTitle$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "docType": "Journal Article", "docType$meta": { "confidence": "high", "note": "NLM
— SMPTE journal paper", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "doi": "10.5594/J06442", "doi$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "href": "https://doi.org/10.5594/J06442", "href$meta": { "confidence": "high", "note": "Constructed from DOI 10.5594/J06442", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "issn": { "print": "0036-1682", "print$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "issn$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "journalAcronym": "MIJR", "journalAcronym$meta": { "confidence": "high", "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/07132015 BACKFILE FOR JOURNAL/smptej_105_11/MIJR15Vol105No11.xml)", "source": "parsed", "updated": "2026-06-16T16:11:59.617Z", "version": "smpte-journal-issue-xml@v1" }, "journalTitle": "SMPTE Journal", "journalTitle$meta": { "confidence": "high", "note": "Era-accurate journal title from SMPTE canonical repository (periodical parent at time of publication) (smpte-canonical-audit/canonicalLibrary.*.json)", "originalValue": null, "source": "parsed", "updated": "2026-07-08T00:35:38.133Z", "version": "smpte-canonical-repo@v1" }, "number": "11", "number$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "pages": "698–701", "pages$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publicationDate": "1996-11-01", "publicationDate$meta": { "confidence": "high", "note": "Day absent in NLM source — padded to 01", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publisher": "SMPTE", "publisher$meta": { "confidence": "high", "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "publisherLocation": { "city": "White Plains, NY", "city$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "country": "USA", "country$meta": { "confidence": "high", "note": "Parsed from journal_metadata XML (_source/SMPTE/APTARA/DL Project Files/07132015 BACKFILE FOR JOURNAL/smptej_105_11/MIJR15Vol105No11.xml)", "source": "parsed", "updated": "2026-06-16T16:11:59.617Z", "version": "smpte-journal-issue-xml@v1" } }, "publisherLocation$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" }, "references": { "bibliographic": [ "orphan/10.5594-J06442/bibr1-10.5594_J06442" ], "bibliographic$meta": { "confidence": "medium", "note": "Extracted from NLM via extractSmpteJournalRefs.js (orphan-slug-mint)", "source": "parsed", "updated": "2026-07-06T18:21:02.558Z" } }, "resolvedHref": "https://journal.smpte.org/periodicals/SMPTE%20Journal/105/11/8/", "resolvedHref$meta": { "confidence": "high", "note": "Backfilled from url.validate report #resolvedHref", "originalValue": null, "source": "resolved", "updated": "2026-06-19T20:59:07.412Z" }, "status": { "active": true, "active$meta": { "confidence": "medium", "note": "No explicit status in NLM source — journal articles default active", "source": "inferred", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } }, "volume": "105", "volume$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/Source Bak/smptej/10.5594_J06442.xml)", "source": "parsed", "updated": "2026-05-22T19:19:44.900Z", "version": "smpte-journal-article-nlm@v1" } } }