Image data compression
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United States of America Patent
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-
Dec 26, 2000
Grant Date -
N/A
app pub date -
Jul 31, 1997
filing date -
Jul 31, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Image data compression apparatus in which data is encoded using a variable degree of quantization selected for areas of an image so that the quantity of encoded data for each area does not exceed a predetermined maximum quantity of data comprises two or more trial encoders operable in parallel to trial encode image data using respective predetermined trial degrees of quantization; a selector for selecting one of the predetermined trial degrees of quantization in response to the quantities of data produced during the trial quantizations; and one or more further trial encoders operable to trial encode image data using degrees of quantization derived from the degree of quantization selected by the selector.
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