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Two-dimensional-coding-apparatus

Control of brightness level adapted to control of contrast

OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, there is shown a transfer function according ...

`Virtual` encryption scheme combining different encryption operators into compound-encryption mechanism

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FIG. 1 is block diagram showing a preferred division of typical network-dependent functions 10 and ...

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The present invention provides a digital video recorder compatible receiver. In a representative ...

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The invention described in the second CIP application eliminates the need for installation of ...

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Dual disc adapter with downward sloping outside corner wedges

The inventors have found that these two diverse sets of needs can be met by a single adapter insert ...

Digital data storage assembly with particular hub adaptor

OF THE INVENTION Referring now to FIG. 1 of the drawing figures, there is shown an exploded ...

Two dimensional coding apparatus

Details

Inventors: Mizutani, Motoharu;
Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP)
Primary Examiner: Masinick; Michael A.
Assistant Examiner:
Attorney, Agent or Firm: Cushman, Darby and Cushman

A two dimensional coding apparatus in use with a facsimile for two dimensionally coding an image signal, comprises an image memory for storing an image signal and a two dimensional coder for the modified READ coding the image signal in the image memory for each block having a predetermined number of scanning lines. A code signal output from the two dimensional coder is transmitted to a decoder through a transmission line. When a transmission error code is detected by a decoder, the code signal of that block containing the error is retransmitted. A K factor generator selects the block size (K factor) of the two dimensional coder to be optimum according to an error rate, so as to minimize a bit length of the whole transmitted code signals including the retransmitted code signal.

DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide a two dimensional coding apparatus for use in an image signal processing system such as facsimile or an image signal filing system, where the apparatus can effectively reduce and code the image signal so as to minimize the amount of data to be processed.
To achieve the above object, a two dimensional coding apparatus is provided comprising: means for two dimensionally coding an image signal for each predetermined block in a successive manner, code processing means for transmitting or storing the code signal output from the coding means, means for detecting an error code in the code signal during transmission or storing by the code processing means, means for retransmitting or restoring a code signal including an error code according to an output of the detecting means, and means for selecting a block size for the coding means according to an error rate of the code processing means.

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