Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Patent
1997-07-31
2000-12-26
Kelley, Chris S.
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
H04B 166
Patent
active
061670855
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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Gillard Clive Henry
Saunders Nicholas Ian
Chang Dexter T.
Frommer William S.
Kelley Chris S.
Sony Corporation
Sony United Kingdom Limited
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