Apparatus for decoding variable-length encoded data
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United States of America Patent
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-
Oct 30, 1990
Grant Date -
N/A
app pub date -
Mar 31, 1988
filing date -
Mar 31, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Digital image data is encoded using a variable-length code which is described by a group of parameter values. Each parameter value describes a set of code values; each code value corresponds to a possible value of the data which is to be encoded. When the data is encoded, the parameter values are appended to the encoded data. A decoder stores the parameter values into a memory and then combines data values derived from the encoded data with parameter values from the memory to generate decoded data values. Each code word includes a prefix which indicates a number of successive parameter values which are to be summed, and a population index which is to be added to the summed parameter values to produce a decoded data value.
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