Pub Date : 1974-02-01DOI: 10.1109/TBTR1.1974.299805
H. Nabeyama, G. Miyazaki
Two directions may be seen in the development of the future color television broadcast: 1) improving information quality, and 2) increasing variety of information to satisfy individual viewers' needs. Improved quality can be attained by high resolution television systems. On the other hand, improved variety can be attained by a still-picture television system.
{"title":"A Receiver With Low-Cost Frame Grabber for Still-Picture Television System","authors":"H. Nabeyama, G. Miyazaki","doi":"10.1109/TBTR1.1974.299805","DOIUrl":"https://doi.org/10.1109/TBTR1.1974.299805","url":null,"abstract":"Two directions may be seen in the development of the future color television broadcast: 1) improving information quality, and 2) increasing variety of information to satisfy individual viewers' needs. Improved quality can be attained by high resolution television systems. On the other hand, improved variety can be attained by a still-picture television system.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115940139","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}
Pub Date : 1974-02-01DOI: 10.1109/TBTR1.1974.299804
R. Vogel
In the beginning the world of color television was dark, and the customer was fearful, but the salesman flipped the switch and said, "Let there be light." And there was light -well almost light -and it was colored and the customer saw it was good...so he bought it. When he got it home, however, the customer realized his color set was almost dark compared to his monochrome set, so he didn't buy as many color sets as the salesman had. The salesman pondered the question and said to the engineer, "Why can't there be more light so I can sell more color television sets?" And the engineer looked puzzled and said, "I don't know how to do it, but since the color television system -including cathode ray tube, broadcast standards, circuitry and what have you are all impossible anyway -I might as well try to give you more light." So he did.
{"title":"Color Television Brightness-Yesterday, Today and Tomorrow","authors":"R. Vogel","doi":"10.1109/TBTR1.1974.299804","DOIUrl":"https://doi.org/10.1109/TBTR1.1974.299804","url":null,"abstract":"In the beginning the world of color television was dark, and the customer was fearful, but the salesman flipped the switch and said, \"Let there be light.\" And there was light -well almost light -and it was colored and the customer saw it was good...so he bought it. When he got it home, however, the customer realized his color set was almost dark compared to his monochrome set, so he didn't buy as many color sets as the salesman had. The salesman pondered the question and said to the engineer, \"Why can't there be more light so I can sell more color television sets?\" And the engineer looked puzzled and said, \"I don't know how to do it, but since the color television system -including cathode ray tube, broadcast standards, circuitry and what have you are all impossible anyway -I might as well try to give you more light.\" So he did.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"14 S3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120981945","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}
Pub Date : 1974-02-01DOI: 10.1109/TBTR1.1974.299801
M. Wilcox
The operation of multiplier and video amplifier circuits used in present TV IF detector ICs is explained. A new detector is described which uses a separate sound detector to allow conventional trapping before the video detector. The sound carrier output is buffered and the video detector features differential inputs and special circuitry to handle input overloads. An NPN video amplifier uses differential to single-ended conversion to improve linearity and dc stability. The 14 lead device also includes an auxiliary video output, a carrier source for AFT, and a sync separator device.
{"title":"A New TV Video/Sound Detector IC","authors":"M. Wilcox","doi":"10.1109/TBTR1.1974.299801","DOIUrl":"https://doi.org/10.1109/TBTR1.1974.299801","url":null,"abstract":"The operation of multiplier and video amplifier circuits used in present TV IF detector ICs is explained. A new detector is described which uses a separate sound detector to allow conventional trapping before the video detector. The sound carrier output is buffered and the video detector features differential inputs and special circuitry to handle input overloads. An NPN video amplifier uses differential to single-ended conversion to improve linearity and dc stability. The 14 lead device also includes an auxiliary video output, a carrier source for AFT, and a sync separator device.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126783817","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}
Pub Date : 1974-02-01DOI: 10.1109/TBTR1.1974.299803
M. J. Maytum
Two classes of self stabilising horizontal deflection circuit are analysed. It is shown that both types, when optimised, involve a relatively small increase in deflection transistor VA for the stabilisation function. Typically the circuits are capable of stabilising against a 2 to 1 change in supply voltage with high efficiency.
{"title":"Transistorised Self-Stabilising Horizontal-Deflection Systems","authors":"M. J. Maytum","doi":"10.1109/TBTR1.1974.299803","DOIUrl":"https://doi.org/10.1109/TBTR1.1974.299803","url":null,"abstract":"Two classes of self stabilising horizontal deflection circuit are analysed. It is shown that both types, when optimised, involve a relatively small increase in deflection transistor VA for the stabilisation function. Typically the circuits are capable of stabilising against a 2 to 1 change in supply voltage with high efficiency.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1974-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132274663","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299768
K. L. Boyd, John R. D'Aiuto
This paper will describe a single-vidicon color television camera. This camera, shown in Fig. 1, was designed with the idea that it will eventually be used in the consumer home entertainment market. The basic requirements, therefore, are low cost, small size, high reliability, NTSC compatible, and requiring little or no technical skill to operate. It is fully automatic with the only operating control being the ON-OFF switch. A self contained electronic viewfinder is included to display what is being televised, as well as provide instant playback of signals recorded on a VTR. The output signal is a 1 VPP NTSC compatible video signal with a 75 ohm output impedance. A standard -65 dbm audio signal is also available on a separate output. The entire system is line operated and draws a total of 50 watts. The camera head (including viewfinder and 4:1 zoom lens) weighs 6.9 lbs. while the video processor unit weighs 8.8 lbs. The output video S/N ratio is better than 40 db for a normally lighted living room scene.
{"title":"A One-Tube Color Television Camera","authors":"K. L. Boyd, John R. D'Aiuto","doi":"10.1109/TBTR1.1973.299768","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299768","url":null,"abstract":"This paper will describe a single-vidicon color television camera. This camera, shown in Fig. 1, was designed with the idea that it will eventually be used in the consumer home entertainment market. The basic requirements, therefore, are low cost, small size, high reliability, NTSC compatible, and requiring little or no technical skill to operate. It is fully automatic with the only operating control being the ON-OFF switch. A self contained electronic viewfinder is included to display what is being televised, as well as provide instant playback of signals recorded on a VTR. The output signal is a 1 VPP NTSC compatible video signal with a 75 ohm output impedance. A standard -65 dbm audio signal is also available on a separate output. The entire system is line operated and draws a total of 50 watts. The camera head (including viewfinder and 4:1 zoom lens) weighs 6.9 lbs. while the video processor unit weighs 8.8 lbs. The output video S/N ratio is better than 40 db for a normally lighted living room scene.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115265318","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299777
Louis Dorren, Jerome Torczyner
During the past decade commercial sound reproduction has progressed from monophonic to two-channel stereophonic reproduction. Now, four-channel sound sources are rapidly becoming dominant for music reproduction. Since the pilot tone system of broadcasting in use today is limited to two channels, a new but fully compatible four-channel system was developed. This "Dorren Quadraplex System" was designed from the start to meet the following conditions: ?full compatibility with all existing equipment; ?unimpaired directionality and channel separation; ?reproduction of the frequency range 50 to 15,000 Hz in all channels; ?minimum distortion and cross-talk between channels; ?minimum signal-to-noise ratio impairment ?no additional RF spectrum requirements Experimental use of this system for broadcasting began at radio station KIOI (125 kW ERP) in San Francisco in December 1970, with a Station Temporary Authorization from the Federal Communications Commission. Additional broadcasts were done over another major station, CHFI (210 kW ERP) in Toronto, Canada. This test was supervised by the Department of Communications and the Canadian Radio and Television Commission. It was found that, "Compatibility was evident in all cases". Additional testing and use is expected in Japan in the near future. The system has shown itself to offer performance for better than the minimum FCC standards and, therefore, its performance in production can be guaranteed.
{"title":"An Optimum Quadraphonic FM Broadcasting System","authors":"Louis Dorren, Jerome Torczyner","doi":"10.1109/TBTR1.1973.299777","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299777","url":null,"abstract":"During the past decade commercial sound reproduction has progressed from monophonic to two-channel stereophonic reproduction. Now, four-channel sound sources are rapidly becoming dominant for music reproduction. Since the pilot tone system of broadcasting in use today is limited to two channels, a new but fully compatible four-channel system was developed. This \"Dorren Quadraplex System\" was designed from the start to meet the following conditions: ?full compatibility with all existing equipment; ?unimpaired directionality and channel separation; ?reproduction of the frequency range 50 to 15,000 Hz in all channels; ?minimum distortion and cross-talk between channels; ?minimum signal-to-noise ratio impairment ?no additional RF spectrum requirements Experimental use of this system for broadcasting began at radio station KIOI (125 kW ERP) in San Francisco in December 1970, with a Station Temporary Authorization from the Federal Communications Commission. Additional broadcasts were done over another major station, CHFI (210 kW ERP) in Toronto, Canada. This test was supervised by the Department of Communications and the Canadian Radio and Television Commission. It was found that, \"Compatibility was evident in all cases\". Additional testing and use is expected in Japan in the near future. The system has shown itself to offer performance for better than the minimum FCC standards and, therefore, its performance in production can be guaranteed.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122869223","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299781
D. Cooper
It is proposed that the previously described QNX matrix [1] be used to provide the information content for quadruplex FM transmission, QFMX. In this proposal, a true, omnidirectional signal 'T appears in the baseband of the composite FM modulating signal, while a directionally encoded stereodifference signal T modulates the normal-phase 38-kHz subcarrier and a conjugately>encoded difference signal T modulates the quadrature-phase 3w-kHz subcarrier. The fourth signal TQ is provided via SSB (single sideband) modulation of a synchronized 57-kHz subcarrier, using the upper sideband. The bandwidth of TQ may be selected at the broadcaster's option to be 3 kHz, if SCA (subsidiary communication authorization) is to be used, or 15 kHz if SCA is not to be used. If used, the SCA signal may occupy the band from 64 kHz to 91 kHz, or some fraction thereof. Suitable pilot signals are provided, at 19 kHz, 57 kHz, and 95 kHz.
{"title":"Proposal QFMX for use of 4-4-4 QMX Matriz in Qyadryokex Ebcidubg if FM Transmission","authors":"D. Cooper","doi":"10.1109/TBTR1.1973.299781","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299781","url":null,"abstract":"It is proposed that the previously described QNX matrix [1] be used to provide the information content for quadruplex FM transmission, QFMX. In this proposal, a true, omnidirectional signal 'T appears in the baseband of the composite FM modulating signal, while a directionally encoded stereodifference signal T modulates the normal-phase 38-kHz subcarrier and a conjugately>encoded difference signal T modulates the quadrature-phase 3w-kHz subcarrier. The fourth signal TQ is provided via SSB (single sideband) modulation of a synchronized 57-kHz subcarrier, using the upper sideband. The bandwidth of TQ may be selected at the broadcaster's option to be 3 kHz, if SCA (subsidiary communication authorization) is to be used, or 15 kHz if SCA is not to be used. If used, the SCA signal may occupy the band from 64 kHz to 91 kHz, or some fraction thereof. Suitable pilot signals are provided, at 19 kHz, 57 kHz, and 95 kHz.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"40 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126857083","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299773
P. Alfke, N. Doyle, Moise Hamaoui, Otto Hibbe
Remote control systems for television receivers have, in general, tended to fall into the category described by the block diagram shown in Figure 1. This usually consists of an ultrasonic CW generator which transmits a specific frequency to the receiver for each control function required. The receiver system comprises an ultrasonic pick-up transducer and amplifier feeding the received signal to a series of tuned band-pass amplifiers, one for each frequency. The detected signal is then used to activate the desired control function. The signal frequencies employed are in the 30 to 50kHz range. Some of the problems with this type of system include range and directionality of the transmitter, receiver response to spurious inputs, e. g. coin/key noises, and the complexity of the receiver circuitry and its alignment. It is to this latter problem that this paper principally addresses itself.
{"title":"An Approach to Ultrasonic Remote Control Systems","authors":"P. Alfke, N. Doyle, Moise Hamaoui, Otto Hibbe","doi":"10.1109/TBTR1.1973.299773","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299773","url":null,"abstract":"Remote control systems for television receivers have, in general, tended to fall into the category described by the block diagram shown in Figure 1. This usually consists of an ultrasonic CW generator which transmits a specific frequency to the receiver for each control function required. The receiver system comprises an ultrasonic pick-up transducer and amplifier feeding the received signal to a series of tuned band-pass amplifiers, one for each frequency. The detected signal is then used to activate the desired control function. The signal frequencies employed are in the 30 to 50kHz range. Some of the problems with this type of system include range and directionality of the transmitter, receiver response to spurious inputs, e. g. coin/key noises, and the complexity of the receiver circuitry and its alignment. It is to this latter problem that this paper principally addresses itself.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131815686","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299779
A. Csicsatka, John F. Foster, J. Metro
The two channel FM Stereo Broadcast System1 in use today was extended by General Electric to a 4-channel system; and in October 1971 this proposed General Electric 4-channel FM Stereophonic Broadcast System was successfully field-tested on an experimental basis in the Schenectady, New York area over radio station WGFM2. This system is compatible with present two-channel stereophonic and monophonic broadcast receivers, provides equal noise characteristics at the four audio outputs and allows the use of the Subsidiary Communication Authorization (SCA) channel at a higher 95 KHz subcarrier. The system transmits the full audio frequency range of 50 to 15,000 Hz on each of four audio channels and maintains at least 30 dB audio channel separation between each of them. The measured harmonic distortion and intermodulation distortion falls well within the existing FCC requirements for broadcast equipment.
{"title":"An Experimental Quadraphonic FM Broadcast System","authors":"A. Csicsatka, John F. Foster, J. Metro","doi":"10.1109/TBTR1.1973.299779","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299779","url":null,"abstract":"The two channel FM Stereo Broadcast System1 in use today was extended by General Electric to a 4-channel system; and in October 1971 this proposed General Electric 4-channel FM Stereophonic Broadcast System was successfully field-tested on an experimental basis in the Schenectady, New York area over radio station WGFM2. This system is compatible with present two-channel stereophonic and monophonic broadcast receivers, provides equal noise characteristics at the four audio outputs and allows the use of the Subsidiary Communication Authorization (SCA) channel at a higher 95 KHz subcarrier. The system transmits the full audio frequency range of 50 to 15,000 Hz on each of four audio channels and maintains at least 30 dB audio channel separation between each of them. The measured harmonic distortion and intermodulation distortion falls well within the existing FCC requirements for broadcast equipment.","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134151074","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}
Pub Date : 1973-11-01DOI: 10.1109/TBTR1.1973.299775
K. Benson
{"title":"Report on Sources of Variability in Color Reproduction as Viewed on the Home Television Receiver","authors":"K. Benson","doi":"10.1109/TBTR1.1973.299775","DOIUrl":"https://doi.org/10.1109/TBTR1.1973.299775","url":null,"abstract":"","PeriodicalId":426905,"journal":{"name":"IEEE Transactions on Broadcast and Television Receivers","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1973-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114999170","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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