液晶与显示, 2011, 26 (5): 640, 网络出版: 2011-10-27
RGB格式数据向BT.656视频标准转换的关键技术
Key Technology of Video Format Convert From RGB to BT.656
状态转移 线性循环补偿法 RGB RGB BT.656 BT.656 status transfer linear and circular compensation method FIFO FIFO
摘要
针对当前多数场合需要将RGB格式图像数据转换成BT.656视频标准的现状,提出了基于FPGA的实现方案,分析了系统的各组成模块和关键技术。利用状态转移机制,产生了BT.656视频标准时序;通过线性循环补偿法,避免了RGB向YUV格式转换的颜色失真现象;使用带有输入输出选择控制功能的FIFO电路,解决了输入输出数据的速率匹配问题。仿真验证结果表明,所提出的方案效果良好,具有广阔的应用前景。
Abstract
Aimed at the necessary of digital video convert from RGB to BT.656 on many occasion, a realization scheme based on FPGA was put forward. The key technology and modules of system was analyzed. The status transfer mechanism was used to accomplish the production of BT.656 video timing; The linear and circular compensation method was applied to avoid the color distortion when conversion from RGB to YUV; The FIFO circuit with function of input and output selection control was employed to resolve the speed matching between input data and output data. The emulation result shows good purpose while an application example is introduced to indicate its broad prospect in video signal conversion.
张倩, 胡健生. RGB格式数据向BT.656视频标准转换的关键技术[J]. 液晶与显示, 2011, 26(5): 640. ZHANG Qian, HU Jian-sheng. Key Technology of Video Format Convert From RGB to BT.656[J]. Chinese Journal of Liquid Crystals and Displays, 2011, 26(5): 640.