Method for compressing data

Details Method for compressing data Method for compressing data

1988-03-03

1989-12-26

Shoop, Jr., William M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

381 31, 341 51, 341 63, G01L 302, H03M 738

Patent

active

048903264

ABSTRACT:
A method for compressing and decompressing voice data enables efficient voice storage on small computers. Analog voice data is converted to digital voice data and the difference jumps between adjacent numbers in the digital voice data are measured. In the preferred embodiment, if the value of the jump is within the range +2 to -2, then a code value is assigned to that jump from zero to four where the code value equals the jump value plus two. If the jump value is outside the range, a jump is normally assigned a code value of five. Three adjacent codes are compressed to one code using the formula:

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