Coefficient seed data production device and method for the conversion of information signals

摘要

The invention relates to an information signal processor, etc. that are well suitable for use in conversion of, for example, an SD signal into an HD signal. The pixel data sets of a tap corresponding to an objective position in the HD signal are extracted selectively from the SD signal. Class CL to which pixel data set of the objective position belongs is then obtained using the pixel data sets of the tap. A coefficient production circuit (136) produces coefficient data sets Wi for each class based on coefficient seed data sets for each class and values of picture quality adjusting parameters, h and v obtained by user operation. A tap selection circuit (121) selectively extracts the data sets xi of the tap corresponding to the objective position in the HD signal from the SD signal and then, a calculation circuit (127) produces the pixel data sets of the objective position in the HD signal according to an estimation equation using the data sets xi and the coefficient data sets Wi corresponding to the class CL read out of a memory (134). It is thus possible to adjust the picture quality arbitrarily on a plurality of axes.