MPEG1 trace structure
3 types of frames
- I-frame: compressed original frame
- P-frame: calculated by motion compensation with respect to the previous I- or P-frame
- B-frame: calculated by motion compensation with respect to the previous I- or P- frame and the next I- or P- frame (interpolation between them)
Group of pictures (GOP): arrangement of the frames in deterministic periodic sequence
- IBBPBBPBBPBB (GOP length = 12)