delta frame

(redirected from bidirectional frame)

delta frame

In interframe video coding, a delta frame is a "difference" frame that provides an incremental change from the previous frame. Delta frames can be P-frames or B-frames. P-frames (predictive frames) contain only the changes from the previous frame, whereas B-frames (bi-directional frames) are P-frames with data about the next frame. See interframe coding.
References in periodicals archive ?
We can classify each frame as intraframe (for short, I-frame), predictive frame (for short, P-frame), and bidirectional frame (for short, B-frame) which is more compressible than I-frame.
When prediction is performed from the previous frames, inter frame is called P-frame (previous frame) and in case the prediction is performed from the next frame, inter frame is called B-frame (bidirectional frame).
B-Frames--A B-Frame is a bidirectional frame, meaning that it can reference both the previous and last frame, and hence is more efficient to encode.

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