专利内容由知识产权出版社提供
专利名称：Image signal converting apparatus发明人：Tetsujiro Kondo,Masashi Uchida,Kunio
Kawaguchi
申请号：US08/8267申请日：19970327公开号：US05940132A公开日：19990817
摘要：An input digital image signal (SD signal) is converted into a high resolutiondigital video signal (HD signal). A considered pixel is categorized as a class correspondingto a one-dimensional, two- dimensional, or three-dimensional level distribution of aplurality of reference pixels of the SD signal. A predicted value of the considered pixel isgenerated by linear combination of values of a plurality of pixels of the SD signal adjacentto the considered pixel of the HD signal and predicted coefficients that have been learnt.In the learning process, predicted coefficients are determined by linear combination ofthe values of pixels of the SD signal and the predicted coefficients so that the sum ofsquares of the predicted value and the true value is minimized. Instead of the predictedcoefficients, representative values may be determined for each class. In this case, therepresentative values are used as predicted values corresponding to the class of theinput SD signal. Examples of the representative values are a base value of a block and avalue normalized by dynamic range DR.
申请人：SONY CORPORATION
代理人：Jay H. Maioli
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