Technique for data compression by decoding binary encoded data
View Patent ↗This disclosure relates to the transmission of binary data over a network between a transmission host and a receiving host. The transmission host receives packets of data including data in a first format which may be ASCII formatted and contain 6 bits-per-byte words, and including data which had an original binary format containing greater than 6 bits-per-byte words (such as 8 bits-per-byte) and which has been encoded (such as Uuencoded) to 6 bits-per-byte words. The transmission host searches the packets and identifies the encoded data and reverse codes the encoded data to its original binary format, before transmitting the data on a suitable network transmission media that can transmit both ASCII formatted data and data having greater than 6 bit-per-byte formats. The transmission host also includes an application packet demultiplexer for separating the incoming data according its application such as HTTP, NNTP, FTP, etc. The transmitting host includes an identifier in the packets for identifying the reverse coded data. The receiving host responds to the identifier and may encode the previously reverse coded data.
1. A system for compression of data streams received in packets, the packets being produced by different applications and each application producing packets having distinct port numbers, said system comprising:
application packet demultiplexer means for receiving said packets and for separating said packets into different application packet streams, each of said streams being for a different application, a plurality of application specific compression algorithms, each of said algorithms receiving and compressing one of said application packet streams, and packet multiplexer means connected to receive and multiplex said compressed application packet streams.
2. A system as set forth in claim 1 , wherein said algorithms comprise an NNTP compression specific algorithm, and HTTP compression specific algorithm, and an FTP compression specific algorithm.
3. A system as set forth in claim 2 , and further comprising means connecting said demultiplexer means to said multiplexer means for streams other than said application packet streams.