Assume that we wish to compress a digital video file using MPEG-1 technology.The target bit rate is 1.5 Mbps.If the video is displayed at a resolution of 352× 240 at 30 frames per second using 24 bits to represent each color,what is the necessary compression ratio to achieve
the desired bit rate?
Answer:The bit rate required to support uncompressed video is 352*240*30*3/(1024*1024）MB/s=7.2509 MB/s.The required compression ratio is therefore 7.2509*8/1.5:1=38:1.