Method and apparatus for coding moving picture
AssigneeNEC Corporation
InventorYutaka Yokoyama
Life of this patent
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Abstract
A moving picture coding apparatus and method with improved predictability of a moving picture to be subjected to interframe prediction to obtain an improved quality of a coded picture. In a moving picture coding apparatus for performing interframe motion compensated prediction for applying intraframe coding, interframe forward predictive coding and interframe bidirectional predictive coding to code each frame, by determining a prediction frame interval of frames to be subjected to forward prediction on the basis of interframe predictability, a moving picture is coded while the coder is adaptively changing the prediction frame interval in accordance with the predictability.
Claims13
An apparatus for a one-pass moving picture coding which compensates an interframe motion, by using intraframe (I frame), interframe forward prediction frame (P frame), and interframe bi-directional prediction (B frame), which comprises:
- a calculation unit for calculating a predictability of a P frame which has been encoded just before;
- and
- a determination unit for determining a frame interval between P frames one of which is going to be encoded,
- wherein said frame interval is adaptively changes on the basis of said predictability.
An method for a one-pass moving picture coding which compensates an interframe motion, by using intraframe (I frame), interframe forward prediction frame (P frame) and interframe bi-directional prediction (B frame), which comprises the steps of:
- calculating a predictability of a P frame which has been encoded just before;
- determining a frame interval between P frames one of which is going to be encoded, and
- changing adaptively said frame interval on the basis of said predictability.
Dependencies are inferred from the claim text.