| 摘要 |
<p>A method is provided for decoding digital image data in order to improve a picture quality of a reproduced image by performing a dequantizing in consideration of an input DCT coefficient having a laplacian distribution. The digital image data decoding method of a digital image data decoder may dequantize digital image data using a quantizer having characteristics of mapping an input DCT coefficient xij to a restoration level yij. This may occur by estimating a probability distribution function p(xij) of the input DCT coefficient xij, calculating a mass center Cm, and setting the mass center as a restoration level. <IMAGE></p> |
