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1. 发明授权

US4439786A Apparatus and method for processing television picture signals and other information 失效
标题翻译：用于处理电视图像信号和其他信息的装置和方法
公开(公告)号：US4439786A
公开(公告)日：1984-03-27
申请号：US320058
申请日：1981-11-10
申请人： Gyongyver Claydon , Gordon D. Iles
发明人： Gyongyver Claydon , Gordon D. Iles
IPC分类号： G06F5/10 , G06F5/12 , H04N5/073 , H04N5/04
CPC分类号： G06F5/12 , H04N5/0736 , G06F2205/123
摘要： A problem arises when simultaneous attempts are made to write and read from the same location in a random access memory. The invention deals with this problem by delaying the writing operations automatically by a varying amount to prevent attempts at simultaneous writing and reading: and preferably to position each write operation approximately mid-way between two read operations.The invention is particularly applicable to a television synchronizer. In a television synchronizer video information is digitized and then fed into a memory by write clock signals derived from the video information, e.g. from its line synchronizing pulses. It is fed out of the memory by read clock signals derived from some other source.The invention is also applicable to standards conversion systems, noise reduction systems and picture size reduction and expansion systems.
摘要翻译：当同时尝试从随机存取存储器中的相同位置进行写入和读取时，会出现问题。本发明通过将写入操作自动地延迟一个变化量来处理这个问题，以防止同时写入和读取的尝试：并且优选地将每个写入操作大致中间地定位在两个读取操作之间。本发明特别适用于电视同步器。在电视同步器中，视频信息被数字化，然后通过从视频信息导出的写时钟信号，例如，从其行同步脉冲。它通过从其他来源得到的读取时钟信号从存储器中送出。本发明也适用于标准转换系统，降噪系统和图像尺寸缩小和扩展系统。

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