METHOD OF SIMULTANEOUSLY DECODING AND FORMATTING ENCODED VIDEO SIGNALS

摘要

PURPOSE: A method of simultaneously decoding and formatting encoded video signals is provided to generate a set of decoded video signals with downsized format from the decoded video signals and improved quality at a low cost. CONSTITUTION: A method of simultaneously decoding and formatting encoded video signals processes N encoded video input signals for decoding and reducing the format of each encoded video input signal by a factor N and generating a set of decoded video signals of a reduced format in the pixel domain. Each encoded video input signal comprises DCT blocks(101,102) having a size of 8*8. The method comprises steps of extracting N blocks having a reduced size; a first inverse DCT transform step applied successively to input vectors having a size of 8; and a second inverse DCT transform step applied successively to input vectors having a size of 8. Each inverse DCT step is applied simultaneously on a plurality of DCT blocks of reduced size extracted from the N encoded video input signals. Thus, N output blocks of reduced size defining one of the decoded video signals of reduced format by a factor N are generated.