SAA7115视频解码芯片寄存器的配置与应用

SAA7115 video decoding configuration and application of core registers

为确保视频传输过程中传输数据的正确性,设计了一个简单的视频信号传输系统。在该系统中,对视频解码芯片的配置很关键。与其它普通视频解码芯片相比,SAA7115解码芯片内有自适应的NTSC/PAL/SECAM制式的梳状滤波器,具有高性能图像缩放及I2C总线Read back技术、适用范围广,因此视频解码芯片选用SAA7115。并对SAA7115视频解码芯片中的一些关键寄存器进行了特殊配置,对采集的数据进行了实时显示。结果表明,在该配置下保证了解码数据的正确性,并实现了实时传输。

In order to ensure the correctness of the video data in video transmission, a simple video signal transmission system is designed. In this system,video decoder chip configuration is crucial. Compared with the normal video decoder chip, SAA7115 decoder chip has adaptive NTSC/PAI./SECAM comb filter, has the high performance of image scaling and the I2C bus Read back technology,wide range of applications, so SAA7115 is used. This paper configurates some key register of SAA7115 video decoder chip, and displays the real-time data. The result shows that in this configuration, this system ensure the correctness of the data in decoding, and achieve a real-time transmission.