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Slow scan television scan converter

机译:慢扫描电视扫描转换器

摘要

A system for storing video information at both a slow scan rate and a fast scan rate, and for retrieving video information signals from the stored information at both the slow scan rate and the fast scan rate. A random access memory stores information provided by digital video information signals. An address selector addresses a selected location in the memory. A slow scan counter provides a count at the slow scan rate. The slow scan count is provided to the address selector for indicating the selected location to be addressed in the memory when either storing or retrieving information at the slow scan rate. A fast scan counter provides a count at the fast scan rate. The fast scan count is provided to the address selector for indicating the selected location to be addressed in the memory when either storing or retrieving information at the fast scan rate. An address selection control responds to the fast scan counter for causing the address selector to address the selected locations in the memory indicated by the count provided by the fast scan counter during intervals corresponding to one line of video information provided at the fast scan rate, and to address the selected locations in the memory indicated by the count provided by the slow scan counter during blanking intervals between the video line intervals.
机译:一种系统,用于以慢速扫描速率和快速扫描速率两者存储视频信息,并以慢速扫描速率和快速扫描速率两者从存储的信息中检索视频信息信号。随机存取存储器存储由数字视频信息信号提供的信息。地址选择器寻址存储器中的选定位置。慢扫描计数器以慢扫描速率提供计数。将慢速扫描计数提供给地址选择器,以指示在以慢速扫描速率存储或检索信息时要在存储器中寻址的所选位置。快速扫描计数器以快速扫描速率提供计数。快速扫描计数被提供给地址选择器,用于在以快速扫描速率存储或检索信息时指示要在存储器中寻址的所选位置。地址选择控件响应于快速扫描计数器,以使地址选择器在与以快速扫描速率提供的一行视频信息相对应的间隔内,对由快速扫描计数器提供的计数所指示的存储器中的选定位置进行寻址,以及在视频行间隔之间的消隐间隔期间,寻址慢速计数器提供的计数所指示的存储器中的选定位置。

著录项

  • 公开/公告号US4057836A

    专利类型

  • 公开/公告日1977-11-08

    原文格式PDF

  • 申请/专利权人 ROBOT RESEARCH INC.;

    申请/专利号US19770758019

  • 发明设计人 CLARENCE JENNINGS MUNSEY;

    申请日1977-01-07

  • 分类号H04N7/12;

  • 国家 US

  • 入库时间 2022-08-22 23:27:42

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