IMAGE INFORMATION CONVERTER AND IMAGE INFORMATION CONVERSION METHOD

摘要

PROBLEM TO BE SOLVED: To improve the image quality of P and B pictures configured on the basis of an I picture by reducing the deterioration in the image quality accompanying the re-quantization of the I picture. SOLUTION: A code quantity controller 12 controls a prescribed quantization width of a quantizer 9 on the basis of analysis result information and a prescribed object code quantity to control a code quantity of image compression information at a high bit rate to be outputted. Then the quantizer 9 applies re-quantization to an orthogonal transform coefficient of the image information that is inversely quantized by an inverse quantization device 5 on the basis of the quantization width supplied from the code quantity controller 12.