Noun
B-frame (plural B-frames)
(signal processing) A compressed video frame which is reconstructed based on its differences from both the previous and the subsequent frame.
A B-frame can contain any number of intra-coded blocks and forward-predicted blocks, in addition to backwards-predicted, or bidirectionally predicted blocks. Source: Internet
The typical data rate of an I-frame is 1 bit per pixel while that of a P-frame is 0.1 bit per pixel and for a B-frame, 0.015 bit per pixel. Source: Internet
It is therefore necessary for the player to first decode the next I- or P- anchor frame sequentially after the B-frame, before the B-frame can be decoded and displayed. Source: Internet