Blakely, Sokoloff, Taylor & Zafman LLP
Method and apparatus for selecting a quantization table for encoding a digital image
 A method and apparatus for selecting a quantization table containing quantization coefficients for encoding image data. A set of quantization tables is examined to determine a quantization table which meets a predetermined selection criteria. If such a quantization table is not the first table examined, other tables in the vicinity of a neighborhood of tables are examined utilizing linear searching techniques. If a quantization table which meets the selection criteria is not determined in the vicinity of the neighborhood of tables, quantization tables outside the vicinity of the neighborhood of tables are examined utilizing binary searching techniques. 
Sony Electronics, Inc. Sony Corporation
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Chuen-Chien Ching-Fang Naofumi
Lee Chang Yanagihara