زيادة المناعة الضجيجية في نظام التلفزة

Authors

  • سمير عيسى

Abstract

تُستخدم في قناة التكبير في نظام التلفزة عدة إجراءات لتخفيض مستوى الضجيج المرافق للإشارة التلفزيونية وتخفيض ملحوظيته على شاشة أنبوب الصورة التلفزيوني.  ويتم خفض مستوى الضجيج العشوائي باستخدام مخمِّدات الضجيج ودارات التصحيح.

تتحدد أهمية هذه الإجراءات بالحرص على زيادة حساسية نظام التلفزة، مع الأخذ بعين الاعتبار أن تصحيح أي نوع من التشوهات التي تتعرض لها الإشارة يترافق بزيادة مستوى الضجيج.

يعرض هذا البحث طريقة الترشيح الخطي لزيادة نسبة الإشارة إلى الضجيج دون أن يؤثر ذلك على استبانه الصورة التلفزيونية.

Quite a number of measures are taken in the amplifier section of TV system to minimize the noise content of the TV signal and the visibility of spurious components in the picture. Notably, the level of fluctuation noise is brought down through a proper design of input circuits, noise cancellation, and noise suppression. These measures are important as they enhance the sensitivity of the system, but one ought not neglect the fact that the compensation of any impairment in the TV signal is, as a rule, accompanied by a rise in the noise level.

This paper presents a simple method to increase the signal-noise ratio by linear filtration with out any impact on the picture resolution.

Downloads

Published

2019-01-24

How to Cite

1.
عيسى س. زيادة المناعة الضجيجية في نظام التلفزة. Tuj-eng [Internet]. 2019Jan.24 [cited 2024Nov.24];29(1). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/6980

Issue

Vol. 29 No. 1 (2007): العلوم الهندسية

Section

Articles

License

Copyright (c) 2019 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series

 Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series   .  The Readers have the right to send, print and subscribe to the initial version of the article, and the title of  Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series     Publisher

journal uses a CC BY-NC-SA license which mean

You are free to:

  • Adapt — remix, transform, and build upon the material
  •  
  • The licensor cannot revoke these freedoms as long as you follow the license terms.

 

  • Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • NonCommercial — You may not use the material for commercial purposes.
  • ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
  • No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.