Patent ID: 6333951
Filing Date: 2001-12-25
Classification: H04N

Abstract:
An interblock distortion removal filter used in a process of decoding compression data to video data, said compression data being generated by dividing original video data constituting one screen page into a plurality of M.times.N-pixel blocks and coding said video data by each block according to an irreversible coding method, M and N representing integers greater than one but less than the number of pixels along the least pixel dimension of said screen page, said filter comprising:a first memory for storing first video data of M lines decoded along a predetermined direction of an image;a second memory for storing second video data of another M lines adjacent to said first video data, said first and second memory having a combined memory capacity that is less than what is required for storing an image of the entire screen page; anda computing element for reading out video data of a first line in said second memory or said first memory while reading out video data of a last line in said first memory or said second memory and executing a predetermined filtering process between said video data of the first line and said video data of the last line.