24-7 イントラ符号化フレームにおける可変プリフィルタ制御
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概要
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A pre-filter control of video coding based on intra-frame signal property is proposed. Adaptive low-pass pre-filter making use of inter-frame signal property is effective for reduction of coding artifacts with switching pass-band periodically. However occurrence of an all-intra-frame such as a scene-change frame requires switching of a filter parameter in the middle of the period by referring only the head frame of a new scene. A scheme using an intra-frame activity combined with scene-change detection is proposed and evaluated by computer simulation to show its advantage in picture quality.
- 1993-07-27
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