Can MPEG-1 encode higher sample rates than 352 x 240 x 30 Hz ?
A. Yes. The MPEG-1 syntax permits sampling dimensions as high as 4095 x 4095 x 60 frames per second. The MPEG most people think of as “MPEG-1” is really a kind of subset known as Constrained Parameters bitstream (CPB). What are Constrained Parameters Bitstreams? MPEG-1 CPB are a limited set of sampling and bitrate parameters designed to normalize decoder computational complexity, buffer size, and memory bandwidth while still addressing the widest possible range of applications. The parameter limits were intentionally designed to permit decoder implementations integrated with 4 Megabits (512 Kbytes) of DRAM. Bitstream Parameter Limit pixels/line 704 lines/frame 480 or 576 pixels/frame 101,376 pixels pixels/second 2,534,400 frames/sec 30 Hz bit rate 1.86 Mbit/sec buffer size 40 Kbytes The sampling limits of CPB are bounded at the ever popular SIF rate: 396 macroblocks (101,376 pixels) per picture if the picture rate is less than or equal to 25 Hz, and 330 macroblocks (84,480 pixels) per
