Pub Date : 1979-01-01DOI: 10.1109/TCATV.1979.285789
Authors must enclose a signed copy of this form when submitting manuscripts to the Editor of this publication.
作者在向本出版物的编辑提交稿件时，必须附上本表格的签名副本。
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Pub Date : 1979-01-01DOI: 10.1109/TCATV.1979.285797
Akio Okazaki
Pulse-Internal Modulation is a kind of analogue pulse modulation applicable to narrow band transmission.
脉冲内部调制是一种适用于窄带传输的模拟脉冲调制。
{"title":"Still Picture Transmission by Pulse-Interval Modulation","authors":"Akio Okazaki","doi":"10.1109/TCATV.1979.285797","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285797","url":null,"abstract":"Pulse-Internal Modulation is a kind of analogue pulse modulation applicable to narrow band transmission.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"17-22"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285797","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072233","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285800
Mitsutake Sato;Masashi Murata;Toshihiko Namekawa
This paper proposes a new optical communication system using the Pulse Interval and Width Modulated Code. It is constructed as combinations of pulse width and interval. Then it is easy to understand that the transmission capacity of this Code is bigger than those of Pulse Width Modulation and/or Differencial Pulse Position Modulation.
{"title":"A New Optical Communication System Using the Pulse Interval and Width Modulated Code","authors":"Mitsutake Sato;Masashi Murata;Toshihiko Namekawa","doi":"10.1109/TCATV.1979.285800","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285800","url":null,"abstract":"This paper proposes a new optical communication system using the Pulse Interval and Width Modulated Code. It is constructed as combinations of pulse width and interval. Then it is easy to understand that the transmission capacity of this Code is bigger than those of Pulse Width Modulation and/or Differencial Pulse Position Modulation.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285800","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072229","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285801
P. L. Mambo;D. C. Coll
The results of a study of subjective reactions to a variety of impairments in CATV systems is presented. Methods of simulating and measuring random noise, inter-modulation, cross-modulation, co-channel and adjacent channel interference, and hum modulation are described. The effects of some of these impairments on picture quality, as perceived by a group of subjects are shown. The results provide an indication of the continuous relationship between picture quality and impairment level.
{"title":"Perceived Picture Quality in CATV Systems With Impairments","authors":"P. L. Mambo;D. C. Coll","doi":"10.1109/TCATV.1979.285801","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285801","url":null,"abstract":"The results of a study of subjective reactions to a variety of impairments in CATV systems is presented. Methods of simulating and measuring random noise, inter-modulation, cross-modulation, co-channel and adjacent channel interference, and hum modulation are described. The effects of some of these impairments on picture quality, as perceived by a group of subjects are shown. The results provide an indication of the continuous relationship between picture quality and impairment level.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"10-16"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285801","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072234","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285788
Preston B. Ozmar
When will optical fiber CATV replace coaxial CATV? A study of current literature shows that the time is not yet, although optical fibers have been used for supertrunks and other special purposes. The purpose of the author is to examine some of the calculations which can be used on optical CATV systems as well as some of the improvements necessary for widespread use of optical CATV systems.
{"title":"A Look at Optical Fiber CATV","authors":"Preston B. Ozmar","doi":"10.1109/TCATV.1979.285788","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285788","url":null,"abstract":"When will optical fiber CATV replace coaxial CATV? A study of current literature shows that the time is not yet, although optical fibers have been used for supertrunks and other special purposes. The purpose of the author is to examine some of the calculations which can be used on optical CATV systems as well as some of the improvements necessary for widespread use of optical CATV systems.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"43-46"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285788","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072230","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285799
Provides a listing of current staff, committee members and society officers.
提供现有工作人员、委员会成员和社会官员的名单。
{"title":"IEEE Broadcast, Cable and Consumer Electronics Society","authors":"","doi":"10.1109/TCATV.1979.285799","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285799","url":null,"abstract":"Provides a listing of current staff, committee members and society officers.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"c2-46c"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285799","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072228","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285798
Presents the table of contents for this issue of the periodical.
介绍这期期刊的目录。
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Pub Date : 1979-01-01DOI: 10.1109/TCATV.1979.285787
T. D. Michaelis
This paper reports analytical and experimental work in evaluating AlGaAs heterojunction laser diodes and light-emitting diodes (LED) for utilization in analog optical links (in particular TV channels) employing optical fibers. The analytical work focuses on using the static transfer function to predict distortion, based-on curve fitting (Section C) and calculation of distortion components (Section B). The purpose is to avoid laborious frequency measurements. Also of interest is the determination of channel spacing (Section E) to avoid 2nd and 3rd order interference for devices (lasers and LED's) with rather poor linearity.
{"title":"Laser Diode Evaluation for Optical Analog Link","authors":"T. D. Michaelis","doi":"10.1109/TCATV.1979.285787","DOIUrl":"https://doi.org/10.1109/TCATV.1979.285787","url":null,"abstract":"This paper reports analytical and experimental work in evaluating AlGaAs heterojunction laser diodes and light-emitting diodes (LED) for utilization in analog optical links (in particular TV channels) employing optical fibers. The analytical work focuses on using the static transfer function to predict distortion, based-on curve fitting (Section C) and calculation of distortion components (Section B). The purpose is to avoid laborious frequency measurements. Also of interest is the determination of channel spacing (Section E) to avoid 2nd and 3rd order interference for devices (lasers and LED's) with rather poor linearity.","PeriodicalId":100638,"journal":{"name":"IEEE Transactions on Cable Television","volume":"CATV-4 1","pages":"30-42"},"PeriodicalIF":0.0,"publicationDate":"1979-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/TCATV.1979.285787","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68072231","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 : 1979-01-01DOI: 10.1109/TCATV.1979.285786
Ken Simons
The author proposes two power-related reference levels as standards for the dB expression of power and field-strength, and a "Reference Noise Bandwidth" to allow standardizing noise level measurements in TV Systems with various standards.
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Pub Date : 1978-10-01DOI: 10.1109/TCATV.1978.285756
Akio Okazaki
Pulse-interval modulation (PIM) is reviewed considering its application to the voice band transmission of still picture signals in industrial TV systems. Although PIM seems to have scarcely been utilized in practice, some advantages as an analog pulse modulation can be expected in the case of narrowband transmission. As to the signal-to-noise ratio and the analog message bandwidth, comparisions with PPM and FM are made, which proves that PIM is suited for the TV signal transmission. The dominant defect of PIM is the matter concerning the errors introduced into the pulse spacing by the mutual interferences of bandlimited pulses. Assuming an ideal filter, the effects of bandlimiting are discussed. The differential gain characteristics, and the interference outputs owing to the unwanted lower sidebands of a pulse train are examined, which indicates the effectiveness of lowpass filtering of post-detection signals.
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