| 摘要 |
PCT No. PCT/JP93/01507 Sec. 371 Date Jun. 28, 1994 Sec. 102(e) Date Jun. 28, 1994 PCT Filed Oct. 19, 1993 PCT Pub. No. WO94/11992 PCT Pub. Date May 26, 1994.Encoding and decoding systems for a digital image communication apparatus suppresses any reduction in the encoding efficiency due to leaky prediction. A range correcting unit (3) corrects the range of data of a preceding frame stored in a memory (1) according to a reference value outputted from a reference value outputting unit (2). Thereafter, a leak coefficient multiplying unit (4) multiplies the data by a predetermined leak coefficient and outputs the product data. The data outputted from the leak coefficient multiplying unit (4) are uncorrected by an uncorrecting unit (5) to restore the range corrected by the range correcting unit (3). A predictive error outputting unit (6) detects the difference between the digital image data of an inputted present frame and the data uncorrected by the uncorrecting unit (5), and outputs the difference as a predictive error. A predictive error encoding unit (7) encodes the predictive error outputted from the predictive error outputting unit (6), and outputs the encoded predictive error.
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