H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 7/30 (2006.01) G11B 20/10 (2006.01) H04B 1/66 (2006.01) H04M 1/65 (2006.01) H04M 3/533 (2006.01) H04N 7/50 (2006.01)
Patent
CA 2141901
A signal compression-selection arrangement dynamically trades off signal storage capacity against signal quality, by sacrificing capacity in favor of signal quality whenever capacity is plentiful and sacrificing quality in favor of capacity whenever capacity is scarce. In a messaging system, the arrangement monitors the amount of storage that is presently free and available for storing new messages, either on a system-wide or per-mailbox basis, and automatically selects a higher compression rate than a presently-applied compression rate to be applied to newly-received messages as the amount of free storage falls below each predetermined threshold. Storage capacity may be freed up by recompressing at the new, higher, compression rate those stored messages that were previously compressed at a lower compression rate.
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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