Compressed data expanding apparatus

Details Compressed data expanding apparatus Compressed data expanding apparatus

1996-10-01

1999-07-06

Boudreau, Leo H.

Image analysis

Image compression or coding

Including details of decompression

382232, G06K 936, G06K 946

Patent

active

059206519

ABSTRACT:
A compressed data expanding apparatus for expanding data compressed by predetermined compression rules so as to reconstruct original image data. The data expanding device has an error report function which reports a data error if the number of bits in one line of the expanded data fails to coincide with a designated bit count. The apparatus further includes a controller for carrying out a provisional expansion process and a definitive expansion process. An provisional expansion bit count is determined consecutively within the range from a first lower-limit bit count to a first upper-limit bit count. An expansion instruction regarding one line of the compressed data in a first storage area is sent consecutively to the data expanding device until no error report is returned from the data expanding device. When no further errors are reported, the remainder of the file is expanded using a definitive expansion process which includes an expansion instruction that contains the designated bit count.

REFERENCES:
patent: 4807029 (1989-02-01), Tanaka

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