Tandem operation of input/output data compression modules

A data compression system for operating two data compression modules in tandem, comprising:

• a "master" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable to provide data compression/decompression between said data input/outputs;
• a "dual" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable to provide data compression/decompression between said data input/outputs;
• a data flow path coupling said master and said dual data compression modules;
• an uncompressed data comparator coupled to said master data compression module data compressor/decompressor and coupled to said dual data compression module data compressor/decompressor;
• and
• a dual port "active/slave state" control coupled to said uncompressed data input/outputs and to said data flow managers of said master and of said dual data compression modules, and coupled to said data compressor/decompressors of said master and of said dual data compression modules, responsive to receipt of an input at one of said uncompressed data input/outputs to place said receiving data compression module in an active state, to idle said uncompressed data input/output of the one of said data compression modules (slave) not receiving said input, and said active/slave control causing said slave state data flow manager to monitor said compressed data from said active state compressor/decompressor at said data flow path to supply said compressed data to said slave state data compressor/decompressor to decompress said compressed data, said uncompressed data comparator comparing said uncompressed data from said active state uncompressed data input/output to said decompressed data from said slave state compressor/decompressor.

A data compression system for operating two data compression modules in tandem, comprising:

• a "master" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable to provide data compression/decompression between said data input/outputs, and a CRC generator coupled to said uncompressed data input and to said decompressor of said data compressor/decompressor and generating a CRC from the uncompressed data of said uncompressed data input or from the decompressed data of said data compressor/decompressor;
• a "dual" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable to provide data compression/decompression between said data input/outputs, and a CRC generator coupled to said uncompressed data input and to said decompressor of said data compressor/decompressor for generating a CRC from the uncompressed data of said uncompressed data input or from the decompressed data of said data compressor/decompressor;
• a data flow path coupled to said data flow managers of said master and of said dual data compression modules;
• and
• a dual port "active/slave state" control coupled to said uncompressed data input/outputs and to said data flow managers of said master and of said dual data compression modules, and coupled to said data compressor/decompressors of said master and of said dual data compression modules, responsive to receipt of an input at one of said uncompressed data input/outputs to place said receiving data compression module in an active state, to idle said uncompressed data input/output of the one of said data compression modules (slave) not receiving said input, said active state CRC generator generating a CRC of said uncompressed input data before compression, and said active/slave state control causing said slave state data flow manager to monitor said compressed data from said active state compressor/decompressor at said data flow path so that said slave state data compressor/decompressor decompresses said compressed data, said slave state CRC generator generating a CRC of said decompressed data, and said active/slave state control comparing said CRC from said active state CRC generator to said CRC from said slave state CRC generator.

A data compression system for operating two data compression modules in tandem, comprising:

• a "master" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable with a memory module coupled to said data flow manager to temporarily store compressed data in said memory module and to provide data compression/decompression between said data input/outputs;
• a "dual" data compression module having an uncompressed data input/output, a data compressor/decompressor, a data flow manager, and a compressed data input/output, said module operable with a memory module coupled to said data flow manager to temporarily store compressed data in said memory module and to provide data compression/decompression between said data input/outputs;
• a memory module having a data flow path coupled to said data flow managers of said master and of said dual data compression modules;
• and
• a "tandem" control coupled to said master data compression module data flow manager to cause said master data compression module data flow manager to control said memory module data flow path, and coupled to said dual data compression module data flow manager to cause said dual data compression module data flow manager to relinquish control of said memory module data flow path.