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    • 4. 发明公开
    • 영상 데이터 부호화 장치 및 방법, 그리고 영상 데이터복호화 장치 및 방법
    • 用于编码图像数据和解码图像数据的装置和方法
    • KR1020090037578A
    • 2009-04-16
    • KR1020070102961
    • 2007-10-12
    • 세종대학교산학협력단한국전자통신연구원
    • 한종기유영조홍진우문경애최진수정원식정세윤김동형
    • H04N19/103H04N19/51
    • H04N19/11H04N19/122H04N19/176
    • An apparatus and a method for encoding and decoding image data are provided to keep a high quality image when encoding and decoding an image by diversifying prediction direction. An H.264 / AVC image encoder encodes I and SI macroblocks by using a prediction method inside a screen. A prediction block is used as reference data when encoding and decoding. A diagonal left down direction and a diagonal right down direction are separated by the first angle clockwise and counterclockwise respectively with regard to a vertical direction. A horizontal downward direction and a horizontal upward direction are separated by the second angle clockwise and counterclockwise respectively with regard to a horizontal direction. An prediction mode calculating unit calculates a prediction value of a prediction block with regard to a prediction mode corresponding to each of prediction directions. A prediction mode determining unit determines a prediction mode in which a calculated cost function is minimum as the optimum prediction mode.
    • 提供了一种用于对图像数据进行编码和解码的装置和方法,以通过使预测方向多样化来对图像进行编码和解码时保持高质量的图像。 H.264 / AVC图像编码器通过使用屏幕内的预测方法对I和SI宏块进行编码。 当编码和解码时,预测块用作参考数据。 对角线左下方向和对角线右下方向分别相对于垂直方向分别顺时针和逆时针分开第一角度。 水平向下方向和水平向上方向分别相对于水平方向分别顺时针和逆时针分开第二角度。 预测模式计算单元针对与每个预测方向相对应的预测模式来计算预测块的预测值。 预测模式确定单元确定计算出的成本函数最小的预测模式作为最佳预测模式。