DOWN SCALING OF IMAGES,申请号WO1998SE00448-传众专利搜索

DOWN SCALING OF IMAGES

申请公布号：WO9841929(A2)

申请号：WO1998SE00448

申请日期：1998.03.12

申请公布日期：1998.09.24

申请人：

TELEFONAKTIEBOLAGET LM ERICSSON;CHRISTOPOULOS, CHARILAOS;SKODRAS, ATHANASIOS

发明人：CHRISTOPOULOS, CHARILAOS;SKODRAS, ATHANASIOS

分类号：G06F17/14;G06T3/40;G09G5/00;G09G5/391;H04N7/26;H04N7/30

主分类号：G06F17/14

摘要：In a method and a device for calculation of the Discrete Cosine Transform (DCT) only the DCT coefficients representing the first half and the second half of an original sequence are required for obtaining the DCT for the entire original sequence. The device and the method is therefore very useful when calculation of DCTs of a certain length is supported by hardware and/or software, but when DCTs of other sizes are desired. Areas of application are for example still image and video transcoding, as well as scalable image and/or video coding.