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1. 发明公开

EP0240019A2 Television graphics system 失效
标题翻译： Fernsehgraphiksystem。
公开(公告)号：EP0240019A2
公开(公告)日：1987-10-07
申请号：EP87104883.1
申请日：1987-04-02
申请人： The Grass Valley Group, Inc.
发明人： Ghazey, John Michael
IPC分类号： H04N1/40 , H04N9/74 , G06F15/66
CPC分类号： G06F3/04845 , H04N9/74
摘要： A television graphics system comprises an analog-to-digital converter for digitizing an encoded analog input video signal and generating an encoded digital signal representative of the magnitude of the encoded analog input video signal at a succession of sampling points, a memory device, and a device for writing the encoded digital signal into the memory device. The graphics system also comprises a computer connected to read the encoded digital signal from the memory device, and an arithmetic unit for decoding the encoded digital signal so as to provide decoded digital signals representative of the magnitudes of the luminance and chrominance components of the analog input video signal. The computer is used to modify at least one of the decoded digital signals, and the arithmetic unit encodes the modified digital signal to generate a modified encoded digital signal representative of a modified form of the picture. The modified encoded digital signal is then written into into the memory device.
摘要翻译：电视图形系统包括用于数字化编码的模拟输入视频信号并且在一系列采样点处产生代表编码模拟输入视频信号的幅度的编码数字信号的模拟 - 数字转换器，存储器件和用于将编码的数字信号写入存储器件的装置。图形系统还包括连接到从存储器件读取编码数字信号的计算机，以及用于对编码的数字信号进行解码的算术单元，以便提供表示模拟输入的亮度和色度分量的大小的解码数字信号视频信号。计算机用于修改解码的数字信号中的至少一个，并且算术单元对经修改的数字信号进行编码，以生成表示图像的修改形式的经修改的编码数字信号。然后将经修改的编码数字信号写入存储器件。

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