嵌入式Linux系统中视频输出功能的研究与实现  

Research and Realization of Video Output on the Embedded Linux System

作　　者：王栋柯[1] 胡晨[1] 姚国良[1] 

机构地区：[1]东南大学国家专用集成电路系统工程中心,南京210096

出　　处：《电子器件》2007年第1期331-333,共3页Chinese Journal of Electron Devices

摘　　要：针对嵌入式产品中QVGA向VGA转化的问题,通过应用IntelPXA255处理器中集成LCD控制器的DPC功能和DMA传输功能,配合视频编码芯片CH7013B,在IntelXscale平台下解决此问题以更好地适应视频显示输出的要求.测试结果表明,该方案实现了视频输出格式的转换,占用CPU资源少,效率高,可靠性好,能够满足视频输出显示实时性需要.Aiming at the problem of the transformation from QVGA to VGA in embedded products, this paper brings forward a method of solving this problem on the platform of Intel Xscale. With the application of DPC and the DMA transmission of the LCD controller integrated in the Intel PXA255 processor, cooperating with the video coding chip named CH7013B, this method achieves the intention of translating the outputing format, uses less CPU resource, plays in high performance and reliability, thus it can meet the realtime demands of TV-OUT.

关 键 词：INTEL XSCALE TV-OUT LCD FRAMEBUFFER DMA 

分 类 号：TN27[电子电信—物理电子学]