Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1990-08-28
1993-03-09
Sniezek, Andrew L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
360 381, H04N 594, H04N 578
Patent
active
051930102
ABSTRACT:
In recording and reproducing the digital video signals by bit rate reduction, if they are copied while being subjected to bit rate reduction, no accumulation of distortions in orthogonal transformation or bit rate reduction occurs, and moreover, copying can be done at a low data rate. On the other hand, in case of dividing the data into blocks in each page and transmitting or recording and reproducing the data by block, by concealing the error by the data having the strongest correlation out of the data located in the pages before and after the block in which error has been detected, no degradation in image quality is induced even when the scene changes between pages. Further, at the same time, by detecting the previous concealment information, if there exists a block which was previously concealed in the block in which error has at present been detected, then the data can be fully reproduced by utilizing it, and degradation in image quality can be reduced to a minimum. Also, if degradation in image quality is reduced to a minimum, then the degradation in image quality in the case of repeated copying is reduced to a minimum.
REFERENCES:
patent: 4807033 (1989-02-01), Keesen et al.
patent: 4829522 (1989-05-01), Nishiguchi
patent: 4963992 (1990-10-01), Doi et al.
patent: 5045955 (1991-09-01), Ikeda
Juri Tatsuro
Kadono Shinya
Matsumi Chiyoko
Ohtaka Hideki
Hindi Nabil
Matsushita Electric - Industrial Co., Ltd.
Sniezek Andrew L.
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