Patent ID: 6057885
Filing Date: 2000-05-02
Classification: H04N

Abstract:
A picture information converting apparatus for converting a first digital picture signal into a second digital picture signal, the number of pixels of the second digital picture signal being larger than the number of pixels of the first digital picture signal, comprising:pixel extracting means for extracting the first digital picture signal at a predetermined position thereof;class determining means for detecting a pattern of a level distribution of the first digital picture signal extracted by said pixel extracting means, determining a class of the second digital picture signal to be predicted corresponding to the pattern, and outputting the determined class information;tap decreasing means for integrating data of a plurality of taps of the first digital picture signal into data of a smaller number of taps corresponding to similar coefficient data for each class information;coefficient data storing means for storing coefficient data of a linear prediction equation for each class information; andpredicting means for predicting the second digital picture signal with the integrated first digital picture signal and the coefficient data corresponding to a linear prediction equation.