Tandem operation of input/output data compression modules

Details Tandem operation of input/output data compression modules Tandem operation of input/output data compression modules

1998-01-07

1999-10-19

Auve, Glenn A.

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral adapting

710 1, 710 66, 345202, G06F 1300

Patent

active

059681497

ABSTRACT:
An input/output (I/O) data compression system operates two data compression modules in tandem. A "master" module has an uncompressed data I/O, a data compressor/decompressor, a data flow manager, and a compressed data I/O. An identical "dual" data compression module is also provided. Either module is capable of operating singly to provide compression/decompression between the data I/Os. A "tandem" control causes the master data flow manager to control the compressed data I/O, and causes the dual data flow manager to relinquish control. A dual port "active/slave" control responds to receipt of an input at one of the uncompressed data I/O's, idling the uncompressed data I/O of the module (slave) not receiving the input, and causing the module (active) receiving the input to conduct the input and output of uncompressed data. The input data compressed by the active state module may then be decompressed by the slave state module, and a data comparator, coupled to the decompressed data output, detects whether the data compression of the master is correct.

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