Coded data generation or conversion – Digital code to digital code converters – Byte length changed
Patent
1990-10-29
1992-04-28
Williams, Howard L.
Coded data generation or conversion
Digital code to digital code converters
Byte length changed
341107, 3642606, 364DIG1, H03M 730
Patent
active
051092263
ABSTRACT:
Format compatibility between arithmetic binary compression coding devices used in a magnetic tape drive can be retained even though different numbers of compression/decompression devices are required to attain a higher throughput through the system. Each device must process the data directed to it in a known maximum amount of time. Each compaction processor contains a selected number of statistic tables for each compaction processors. Eight compaction processors are selected with the possibility of two statistic tables in each. Thus format compability can be retained using four compaction processor with two statistic tables in each or double the throughput by using eight compaction processors with one statistic table in each encoder/decoder. Data compacted on a magnetic tape using either speed compaction can be decoded by either tape drive and compatibility is insured.
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MacLean, Jr. Neil H.
Patel Mayank R.
Ripberger Richard A.
International Business Machines - Corporation
Pershon James A.
Williams Howard L.
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