The present invention is directed to an image information encoding apparatus adapted for performing intra-image encoding on the basis of resolution of color components and color space of an input image signal. In the image information encoding apparatus ( 10 ), an intra prediction unit ( 23 ) serves to adaptively change block size in generating a prediction image on the basis of a chroma format signal indicating whether resolution of color components is that of any one of 4:2:0 format, 4:2:2 format and 4:4:4 format, etc., and a color space signal indicating whether color space is any one of YCbCr, RGB and XYZ, etc. In addition, an orthogonal transform unit ( 14 ) and a quantization unit ( 15 ) serve to also change orthogonal transform technique and quantization technique in accordance with the chroma format signal and the color space signal. A reversible encoding unit ( 16 ) encodes the chroma format signal and the color space signal to include the encoded signals thus obtained into image compressed information.

CPC Classifications
IPC Classifications
Download PDF
Document Preview
Document History
  • Publication: Dec 8, 2005
  • Application: Mar 16, 2005
    US US 52792205 A
  • Priority: Jul 20, 2004
    JP 2004010317 W
  • Priority: Jul 18, 2003
    JP 2003277128 A

Sign in to the Lens