Simplified method of designing FIR filter with controllable center frequency

A novel simplified method is presented to design FIR filter with controllable center frequency. The properties of transfer curves for all-phase filters are illustrated under 3 windowing conditions. By combining single-window all-phase filter design steps and double phase-shift combination, a series of design formulas for point-pass filter, notch filter, band-pass filter and band-stop filter are derived, thus the design computation complexity is greatly reduced. Experiments prove that the center frequency of all the filters can be accurately specified at arbitrary position by adjusting frequency parameters m and λ.     

“电视原理”实验教学改革探讨

"电视原理"是我校电子信息工程专业的一门专业核心课程,通过课程的教学,不仅要培养学生全面系统地掌握电视基本理论,而且要使学生能够综合运用专业知识实现电视系统中关键的信号处理技术,因此本课程非常注重理论与实践相结合,实验内容在     

平板显示器图像/图形转换卡的研制

为满足彩色等离子体显示器的需要 ,设计了基于AL30 0的平板显示器转换卡 ,它能自动识别各种不同制式(PAL/NTSC/SECAM )的视频信号和不同显示模式 (从VGA至SXGA)的PC图形信号 ,并进行数字化处理 ,再根据显示面板对显示像素数目的要求 ,将数字图像 /图形信号进行行内插值、行间插值 (插行 )及时序调整处理 ,转换成PDP满屏显示的数据格式 ,并产生相应的控制信号 ,其工作过程由微控制器经I2 C实现 .该显示转换卡的显示效果令人满意 ,已被应用于多家公司的产品设计