HD（High Definition）video is a video of higher resolution and quality than SD(standard-definition) video. JJTS HD video conference camera has 5 generation. They are first 868，20 series, 30 series, 60 series, 70 series. Those 5 generation is different in appearance that can satisfied all kinds of need. Also, each generation has some different module. They are same in appearance but different inside. Especially the sensor. HD video conference cameras bring a more high speed, better quality image, making your conference more real time, realistic, efficient.