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本文对用软件控制法生成电视测试信号的研究工作进行了总结.这种方法是将测试信号数据和指令存入微机磁盘.调用时,将它们读入RAM,再输出数字的或模拟的测试信号.程序用汇编语言和高级语言混合编写,采用了软件时域滤波、抽样、量化和编码等方法.硬件中设计了具有特色的缓冲存储器。实验表明,通过编写软件,可灵活地提供多种符合广播标准的电视测试信号.
In this paper, we summarize the research work of using software control method to generate TV test signal, which is to store the test signal data and instructions in the computer disk.When called, read them into RAM and then output digital or analog test signal The program is written in assembly language and high - level language, and adopts software time domain filtering, sampling, quantization and coding, etc .. The buffer memory is designed in hardware. Experiments show that by writing software, you can flexibly provide a wide range of television test signals that meet the broadcast standards.