{"title":"A Review of the MCA Disco-Vision System","authors":"K. D. Broadbent","doi":"10.5594/J10631","DOIUrl":"https://doi.org/10.5594/J10631","url":null,"abstract":"The MCA Disco-Vision system records audio-video information on a disc, replicates this disc accurately and inexpensively on plastic and finally plays the replicas on home television screens by means of a disc-player attachment. The production of a video record begins with a mastering process where the original program from any video source is recorded in real time as a geometrical pattern on the master disc. After mastering, this pattern is reproduced in the various replication steps leading to the production of multiple inexpensive plastic video records. Specifically, the mastering process uses a laser beam to cut holes in the coating of a master disc and thereby record information. After processing, this master is used to produce replica playback discs. The player reads the information on the playback disc by sensing the reflection of a 1-mW laser beam and recreating an electrical signal corresponding to the original information. The signal is then used to modulate an RF carrier on an unused TV channel and this modulated signal is connected to the TV set where it is processed within the set in the usual manner to produce a color picture and sound.","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127347953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An Audiovisual Producer/User's View of Videodisc Technology","authors":"E. Zwaneveld","doi":"10.5594/J10638","DOIUrl":"https://doi.org/10.5594/J10638","url":null,"abstract":"Brigham Young University, associated with the Mormon Church, is one of the world's largest users and producers of audiovisual materials. In recent years, the University has been adopting such new information technology as multichannel interactive cable television, computer-aided instruction and audio- and videotape to supplement its live and filmed instruction. Recent developments in videodisc technology are being watched with great interest in hopes of finding ways to reduce both the bulk of audiovisual materials and the costs of storing and transmitting information. A consensus of cost estimates — comparing videodisc with other media — is given.","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127097007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Control Mechanisms in the Philips ‘VLP’ Record Player","authors":"P. Janssen, P. E. Day","doi":"10.5594/J10636","DOIUrl":"https://doi.org/10.5594/J10636","url":null,"abstract":"The playing time and the bandwidth of the recorded video signal on the Philips ‘VLP’ record are such that the optical scanning system must be able to perceive extremely fine details when the record is payeld. This requires an optical system with a large aperture and consequently a small depth of focus. It is also essential that the beam of light used for scanning should be centred very accurately on the information-carrying track on the record. The requirements specified here are about 1000 times more exacting than is usual in mechanical engineering. For example, the record surface may differ by 100-500 μm from a true plane while the depth of focus of the lens used to centre the scanning beam on the record is approximately 1 μm. The eccentricity of the track may amount to 100 μm, while the beam of light has to be kept centred on the track with an accuracy of 0.2 μm to avoid cross-talk [1] . To ensure continuous tracking of the information contained in a spiral of pits pressed in the surface of the record, the entire optical system has to be displaced on average by 2 μm radially for each revolution. Finally, a high-quality playback of the detected colour-television signal is only obtained if the speed at which the record rotates is constant to within at least 1 part in 10 3","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116387732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Philips ‘VLP’ System","authors":"K. Compaan, P. Kramer","doi":"10.5594/J10633","DOIUrl":"https://doi.org/10.5594/J10633","url":null,"abstract":"","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122454960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Videodisc: The Next Step in the Communications Evolution","authors":"R. Kreiman","doi":"10.5594/J10630","DOIUrl":"https://doi.org/10.5594/J10630","url":null,"abstract":"","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133791120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The Optical Scanning System of the Philips ‘VLP’ Record Player","authors":"G. Bouwhuis, P. Burgstede","doi":"10.5594/J10635","DOIUrl":"https://doi.org/10.5594/J10635","url":null,"abstract":"The main function of the optical scanning system in the Philips ‘VLP’ record player [1] is to read out the video information recorded on the surface of the disc. To follow the information track on the record with the aid of a control mechanism it must also deliver a signal that is a measure of the lateral misalignment of the optical system in relation to the track. The video information is stored on the surface of the record in the form of small pits which are 0.8 μm wide, about 0.16 μm deep and of variable length. The pits are inscribed on a spiral track with a pitch of approximately 2 μm. The picture quality and mechanical accuracy of an optical system that can detect each pit individually and track the spiral sufficiently accurately to prevent cross-talk between adjacent turns of the track must meet extremely exacting standards. At the same time the system must be as simple as possible to produce and easy to adjust. Finally, care must be taken to ensure that the signal-to-noise ratio is sufficiently high. The article describes the optical system which we chose for the ‘VLP’ record player to satisfy these various requirements.","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114179502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"High-Resolution Graphics Using a HeCd Laser to Write on Kalvar Film","authors":"A. D. Berg, R. Cormier, J. S. Courtney‐Pratt","doi":"10.5594/J10641","DOIUrl":"https://doi.org/10.5594/J10641","url":null,"abstract":"","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124569392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The 50th Anniversary of Mosfilm Studios","authors":"Michael T. Wysotsky","doi":"10.5594/J08765","DOIUrl":"https://doi.org/10.5594/J08765","url":null,"abstract":"The Foundation of Mosfilm Studios took place after the October Revolution on the site of old Moscow motion-picture enterprises, some very old stages built in the early days of silent movies. The production of a first feature motion picture, High Up on the Wings, was completed on January 24, 1924. This date was assumed as the foundation of Mosfilm studios.","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125176008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Super-8 Films in Television Broadcasting","authors":"G. Kessner","doi":"10.5594/J08762","DOIUrl":"https://doi.org/10.5594/J08762","url":null,"abstract":"Television broadcasts which include film clips in the super-8 format pose the question whether and for what purpose this format is appropriate for television use. Based on practical experience within the Bayerische Rundfunk (Bavarian Broadcasting System — BBS) the possibilities and limits for the integration of the super-8 format into television operations are discussed, together with prospects for development of image and sound equipment appropriate for television use.","PeriodicalId":302553,"journal":{"name":"Journal of the SMPTE","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120898867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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