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    10.
    发明公开
    이산 여현 변환/이산 정현 변환을 선택적으로 이용하는 부호화/복호화 장치 및 방법 有权
    使用DESECETE COSINE / SINE TRANSTORM选择性编码/解码图像的装置和方法

    公开(公告)号:KR1020100038060A

    公开(公告)日:2010-04-12

    申请号:KR1020090093127

    申请日:2009-09-30

    Abstract: PURPOSE: Encoding/decoding apparatus and method using DCT/DST selectively are provided to increase a compression ratio of an image block by performing inter/intra prediction between images for a fixed size blocks and then conversion and quantization. CONSTITUTION: A first conversion unit(220) converts a target image into a first conversion coefficient using DCT(Discrete Cosine Transform). A second conversion unit(230) converts the target image into a second conversion coefficient using DST(Discrete Sine Transform). A conversion method decision unit(260) selects the first or second conversion coefficients as a conversion coefficients for the target image. The first conversion unit creates a first decoding image for the target image based on the first conversion coefficient. The second conversion unit creates a decoding image for the target image based on the second conversion coefficient.

    Abstract translation: 目的:选择性地使用DCT / DST的编码/解码装置和方法被提供以通过对固定大小的块进行图像之间的帧间/帧内预测,​​然后进行转换和量化来增加图像块的压缩比。 构成:第一转换单元(220)使用DCT(离散余弦变换)将目标图像转换为第一转换系数。 第二转换单元(230)使用DST(离散正弦变换)将目标图像转换为第二转换系数。 转换方法决定单元(260)选择第一或第二转换系数作为目标图像的转换系数。 第一转换单元基于第一转换系数创建用于目标图像的第一解码图像。 第二转换单元基于第二转换系数创建目标图像的解码图像。

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