Adaptive filtering mechanism to remove encoding artifacts in video data

• Main Authors: AVADHANAM, NIRANJAN, BODDETI, RAVI KUMAR
• Format: Patent
• Language: Chinese; English
• Published: 16.12.2014
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

A method includes determining, through a processor and/or a hardware engine, edge pixels and flat pixels of a video frame of a video sequence during decoding thereof or post-processing associated with the decoding based on a predetermined threshold, and quantifying spatial correlation of pixels of the video frame around edges thereof to estimate strength of ringing artifacts and spatial and temporal persistence thereof across the video frame and across video frames of the video sequence. The method also includes adaptively and spatially filtering the pixels around the edges of the video frame, adaptively and temporally filtering the video frame, and blending an output of the adaptive spatial filtering and the adaptive temporal filtering to generate an output with suppressed ringing artifacts, spatial and temporal persistence thereof and artifacts resulting from the cumulative effect of compression therein.