Patent ID: 6600837
Filing Date: 2003-07-29
Classification: G06T

Abstract:
An image compression controller for compressing image data to generate an image file having a size smaller than a set size, comprising:a compression circuit for compressing redundancy of input image data for coding; a quantization circuit for first quantization based on a first quantization coefficient and second quantization based on a second quantization coefficient on an output signal of the compression circuit; a counter for counting the number of a quantization value having correlation with a size of an image file generated among quantization values included at least in first quantization data from the quantization circuit; a quantization coefficient control circuit for generating a control coefficient based on the count of said counter and a reference value of a quantization value having correlation with a size of an image file generated set in advance; a quantization coefficient generation circuit for supplying a reference quantization coefficient set in advance as said first quantization coefficient to said quantization circuit, generating said second quantization coefficient based on the control coefficient and said reference quantization coefficient, and supplying the same to said quantization circuit when a control coefficient from said quantization coefficient control circuit is received; and an entropy coding circuit for entropy coding on the second quantization data from said quantization circuit.