Patent ID: 6771830
Filing Date: 2004-08-03
Classification: G06T

Abstract:
An imaging device, comprising:a quantization table to provide a quantization table level that is selected based on a calculated intra-frame difference between a first sample associated with a first element of a current scan line and a second sample associated with a second element of a previous scan line, the second element located immediately above the first element in a frame, wherein the frame comprises a plurality of scan lines and the current scan line and the previous scan line represent a portion of the plurality of scan lines; the selected quantization table level to provide a plurality of quantizers that are selected according to the calculated intra-frame difference between a plurality of first samples and their corresponding second samples from a plurality of second samples; an encoded bit stream to represent image data, the encoded bit stream including an encoded representation of the selected quantization table level and encoded information representing one or more of the plurality of quantizers; and a decoder quantization table including a plurality of quantization table levels.