ENCODING APPARATUS, ENCODING METHOD, ENCODING PROGRAM, DECODING APPARATUS, DECODING METHOD AND DECODING PROGRAM

• Main Authors: SUGIYAMA AKIRA, HASHINO TSUKASA
• Format: Patent
• Language: English
• Published: 02.04.2004
• Edition: 7
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To realize encoding which provides high picture quality, high compressibility and high editing accuracy and easily utilizes various kinds of image compression technology. SOLUTION: In an arithmetic block 11, a sum signal DVad and a difference signal DVsu of image signals between frames are produced from an input image signal DVin at the interval of two frames. In a bit rate ratio control block 13, control signals CRad and CRsu for controlling a ratio of encoding bit rates of the sum signal and the difference signal in the encoding bit rate are produced based upon the sum signal DVad and the difference signal DVsu. In an encoding processing block 12, an encoded signal DTad of the encoding bit rate based on the control signal CRad is produced from the sum signal DVad by using encoding processing in which the encoding bit rate is varied based upon the control signals CRad and CRsu and further, an encoded signal DTsu of the encoding bit rate based on the control signal CRsu is produced from the difference signal DVsu. COPYRIGHT: (C)2004,JPO