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Invideo compressionalgorithms aresidual frame is formed by subtracting thereference frame from the desiredframe. This difference is known as the error or residualframe. The residual frame normally has lessinformation entropy, due to nearby video frames having similarities, and therefore requires fewerbits to compress.[1]
Anencoder will use various algorithms such asmotion estimation to construct a frame that describes the differences. This allows adecoder to use the reference frame plus the differences to construct the desired frame.[1]
Recent improvements have lead to "better action recognition."[2]
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