Residual frame

A frame formed during the compression process by subtracting the reference frame from the desired frame.

In video compression algorithms a residual frame is formed by subtracting the reference frame from the desired frame. This difference is known as the error or residual frame. The residual frame normally has less information entropy, due to nearby video frames having similarities, and therefore requires fewer bits to compress.

An encoder will use various algorithms such as motion estimation to construct a frame that describes the differences. This allows a decoder to use the reference frame plus the differences to construct the desired frame.

resources
  • How Video Compression Works on youtube.com
  • Motion compensation on wikipedia.org
  • Residual Frame for Noisy Video Classification According to Perceptual Quality in Convolutional Neural Networks on ieee.org
source
Adapted from content published on wikipedia.org
Last modified on May 24, 2021, 1:33 am
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