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公开(公告)号：US4533944A
公开(公告)日：1985-08-06
申请号：US548112
申请日：1983-11-02
申请人： John E. Eby , Charles M. Kingston
发明人： John E. Eby , Charles M. Kingston
CPC分类号： H04N5/4448 , G06F3/002 , H04N5/14
摘要： A video processing system especially for use with microprocessors or microcomputers characterized by limited memory storage capacity and processing capability. The video processing system includes a TRANSITION DETECTOR for detecting BLACK-TO-WHITE and WHITE-TO-BLACK transitions in a video signal, from whatever source. The output of the TRANSITION DETECTOR is coupled to a FEATURE COUNTER so that the FEATURE COUNTER provides at a computer buss an output indicative of the number of such transitions occurring during a particular horizontal scanning period. An output of the FEATURE COUNTER drives a DECODER that selectively enables a plurality of FEATURE TIMERS, each of which has an input coupled to a CLOCK so that the FEATURE TIMERS provide an output indicative of the time duration between successive transitions in the video signal. The video processing system thereby makes available to the microcomputer the number and respective durations of transitions during a horizontal scanning period. At the end of each horizontal line, this data is transferred via the computer buss into memory and the FEATURE COUNTER and FEATURE TIMERS are reset in preparation for the subsequent line. This cycle is repeated until an entire video frame has been encoded and transferred to the microcomputer for processing as desired.
摘要翻译： 特别是与微处理器或微型计算机一起使用的视频处理系统，其特征在于存储器容量和处理能力有限。 视频处理系统包括用于从视频信号中检测BLACK-TO-WHITE和WHITE-TO-BLACK转换的TRANSITION DETECTOR，从任何来源。 TRANSITION DETECTOR的输出耦合到FEATURE COUNTER（特征计数器），使FEATURE COUNTER在计算机总线上提供指示在特定水平扫描周期内发生的这种转换次数的输出。 特征计数器的输出驱动解码器，其选择性地启用多个特征定时器，每个特征定时器具有耦合到时钟的输入，使得特征定时器提供指示视频信号中连续转换之间的持续时间的输出。 因此，视频处理系统使得在水平扫描周期期间可以向微型计算机提供数量和相应的转换持续时间。 在每条水平线的末端，该数据通过计算机总线传送到存储器中，并且特征计数器和特征定时器被复位以准备随后的行。 重复该循环，直到整个视频帧被编码并传送到微计算机以进行处理。
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公开(公告)号：US4539587A
公开(公告)日：1985-09-03
申请号：US567192
申请日：1983-12-30
申请人： John E. Eby , Charles M. Kingston
发明人： John E. Eby , Charles M. Kingston
CPC分类号： H04N5/4448 , G06F3/002 , H04N5/14
摘要： A video processing system especially for use with microprocessors or microcomputers characterized by limited memory storage capacity and processing capability. The video processing system includes a TRANSITION DETECTOR for detecting BLACK-TO-WHITE and WHITE-TO-BLACK transitions in a video signal, from whatever source. The output of the TRANSITION DETECTOR may be coupled to a FEATURE COUNTER so that the FEATURE COUNTER provides at a computer buss an output indicative of the number of such transitions occurring during a particular horizontal scanning period. The output of the TRANSITION DETECTOR also drives a SHIFT REGISTER that selectively disables a plurality of FEATURE TIMERS, each of which has an input coupled to a CLOCK so that the FEATURE TIMERS provide an output indicative of the time duration between the beginning of a horizontal line and successive transitions in the video signal. The video processing system thereby makes available to the microcomputer the number and respective locations of transitions during a horizontal scanning period. At the end of each horizontal line, this data is transferred via the computer buss into memory and the FEATURE COUNTER and FEATURE TIMERS are reset in preparation for the subsequent line. This cycle is repeated until an entire video frame has been encoded and transferred to the microcomputer for processing as desired.
摘要翻译： 特别是与微处理器或微型计算机一起使用的视频处理系统，其特征在于存储器容量和处理能力有限。 视频处理系统包括用于从视频信号中检测BLACK-TO-WHITE和WHITE-TO-BLACK转换的TRANSITION DETECTOR，从任何来源。 TRANSITION DETECTOR的输出可以耦合到特征计数器，使得特征计数器在计算机总线处提供指示在特定水平扫描周期期间发生的这种转换的数量的输出。 TRANSITION DETECTOR的输出还驱动SHIFT寄存器，其选择性地禁用多个特征定时器，每个特征定时器具有耦合到时钟的输入，使得特征定时器提供指示水平线开始之间的持续时间的输出 以及视频信号中的连续转换。 因此，在水平扫描期间，视频处理系统使得微计算机可以使用数量和各个转换位置。 在每条水平线的末端，该数据通过计算机总线传送到存储器中，并且特征计数器和特征定时器被复位以准备随后的行。 重复该循环，直到整个视频帧被编码并传送到微计算机以进行处理。
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