{ "$schema": "/api/schemas/documents.schema.json", "apiVersion": "1.0.0", "generatedAt": "2026-07-09T21:16:49.031Z", "sourcePath": "src/main/data/docs", "docId": "10.5594-M00780", "document": { "abstract": "The quest for a method of broadcasting stereophonic sound and second language with television goes back many decades. There was a flurry of activity, worldwide, in the late 1950's and early 1960's. In the mid 1960's, the question was raised again in the U.S., but was dropped because of the lack of interest. In the 1970's, both Japan and West Germany adopted standards.", "abstract$meta": { "confidence": "high", "note": "Backfilled from SMPTE canonical repository (smpte-canonical-audit/canonicalLibrary.*.json)", "originalValue": null, "source": "parsed", "updated": "2026-07-08T00:35:38.133Z", "version": "smpte-canonical-repo@v1" }, "authors": [ { "affiliation": "Zenith Electronics Corporation Glenview, IL 60025", "bio": "Carl G. Eilers is Manager, Electronic Systems R&D of the Color Television Operations of Zenith Electronics Corp. Between November, 1961, and September, 1977, he held the position of Manager, Circuits and Radio/Television Systems Research of the Research Division. He joined the company's Research/Engineering staff in February, 1948. Eilers has been a member of the Institute of Electrical and Electronic Engineers (IEEE) since 1947 and has been a Fellow, IEEE, since 1977. He has been a member of the Society of Motion Picture and Television Engineers (SMPTE) since 1956, and the Audio Engineering Society (AES) since 1973. He is serving on the Broadcast Television Systems Committee of the Electronic Industries Association and on two of its subcommittees: as Chairman, Task Force A — Systems, Teletext Subcommittee; and past Chairman, Task Force B — Systems, Multichannel Television Sound. He has also served on the JCIC (Joint Committee on Intersociety Communications) ad hoc committee for the Study of Television Sound. Eilers has also served on the National AM Stereo Radio Committee (NAMSRC) of the EIA as Chairman, System Specifications Panel, the National Quadraphonic Radio Committee (NQRC) of the EIA as Chairman, System Specifications Panel, and the National Stereophonic Radio Committee (NSRC) as member. He received a Bachelor of Science Degree in Electrical Engineering from Purdue University in 1948, and an MSEE Degree from Northwestern University in 1956. A native of Fairbury, Illinois, Eilers lives in River Forest, Illinois. Carl G. Eilers holds 19 patents.", "name": "Carl G. Eilers" } ], "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": "Canonical-confirmed full paper (summary-abstract set is orig-research in the SMPTE canonical repos); HIGHWIRE-era abstract label was a delivery artifact", "originalValue": "summary-abstract", "source": "resolved", "updated": "2026-07-09T19:12:47.628Z", "version": "contenttype-fixes@v1" }, "copyright": { "holder": "Society of Motion Picture and Television Engineers, Inc.", "holder$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "year": "1986", "year$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" } }, "copyright$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "docId": "10.5594-M00780", "docId$meta": { "confidence": "high", "note": "Derived from DOI 10.5594/M00780", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "docLabel": "SMPTE Meetings and Conferences ( February 1986)", "docLabel$meta": { "confidence": "medium", "note": "Composed from venue title, volume/issue and date", "source": "inferred", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "docTitle": "The BTSC Multichannel Television Sound System", "docTitle$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "docType": "Conference Paper", "docType$meta": { "confidence": "high", "note": "NLM
— SMPTE conference paper", "source": "inferred", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "doi": "10.5594/M00780", "doi$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "href": "https://doi.org/10.5594/M00780", "href$meta": { "confidence": "high", "note": "Constructed from DOI 10.5594/M00780", "source": "inferred", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "number": "27", "number$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "pages": "227–236", "pages$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "publicationDate": "1986-02-01", "publicationDate$meta": { "confidence": "high", "note": "Day absent in NLM source — padded to 01", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "publisher": "SMPTE", "publisher$meta": { "confidence": "high", "note": "Normalised to registry \"SMPTE\" convention from NLM publisher-name (The Society of Motion Picture and Television Engineers)", "source": "inferred", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "publisherLocation": { "city": "White Plains, NY", "city$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" } }, "publisherLocation$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" }, "references": { "bibliographic": [ "orphan/10.5594-M00780/bibr1-10.5594_M00780", "orphan/10.5594-M00780/bibr2-10.5594_M00780", "orphan/10.5594-M00780/bibr3-10.5594_M00780", "orphan/10.5594-M00780/bibr4-10.5594_M00780", "orphan/10.5594-M00780/bibr5-10.5594_M00780", "orphan/10.5594-M00780/bibr6-10.5594_M00780", "orphan/10.5594-M00780/bibr7-10.5594_M00780", "orphan/10.5594-M00780/bibr8-10.5594_M00780", "orphan/10.5594-M00780/bibr9-10.5594_M00780", "orphan/10.5594-M00780/bibr10-10.5594_M00780" ], "bibliographic$meta": { "confidence": "medium", "note": "Extracted from NLM via extractSmpteConferenceRefs.js (precheck-reuse)", "source": "parsed", "updated": "2026-07-06T20:02:43.384Z" } }, "resolvedHref": "https://journal.smpte.org/conferences/Digital%20Television%20Tape%20Recording%20and%20Other%20New%20Developments:%2020th%20Annual%20SMPTE%20Television%20Conference/20/", "resolvedHref$meta": { "confidence": "high", "note": "Backfilled from url.validate report #resolvedHref", "originalValue": null, "source": "resolved", "updated": "2026-06-19T20:59:07.439Z" }, "status": { "active": true, "active$meta": { "confidence": "medium", "note": "No explicit status in NLM source — conference papers default active", "source": "inferred", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" } }, "volume": "1986", "volume$meta": { "confidence": "high", "note": "Parsed from NLM article XML (_source/SMPTE/HIGHWIRE/ORIGINAL SAMPLES/Conferences/smptem_1986_27/10.5594_M00780.xml)", "source": "parsed", "updated": "2026-05-22T21:44:19.125Z", "version": "smpte-conference-paper-nlm@v1" } } }