What are the typical coded sizes for the MPEG frames?
Typical bit sizes for the three different picture types: Level I P B Average 30 Hz SIF @ 1.15 Mbit/sec 150,000 50,000 20,000 38,000 30 Hz CCIR 601@ 4 Mbit/sec 400,000 200,000 80,000 130,000 Note: the above example is taken from a standard test sequence coded by the Test Model method, with an I frame distance of 15 (N = 15), and a P frame distance of 3 (M = 3). Of course, among differing source material, scene changes, and use of advanced encoder models these numbers can be significantly different. At what bitrates is MPEG-2 video optimal? The Test subgroup has defined a few example “Sweet spot” sampling dimensions and bit rates for MPEG-2: Dimensions Coded rate Application 352x480x24 Hz (progressive) 2 Mbit/sec Equivalent to VHS quality. Intended for film source video. Half horizontal 601(HHR). Looks almost broadcast NTSC quality 544x480x30 Hz (interlaced). 4 Mbit/sec PAL broadcast quality (nearly full capture of 5.4 MHz luminance signal). 544 samples matches the width of a 4:3 picture
