| 摘要 |
Data compression apparatus for compressing luminance Y and chrominance U/V portions of input image data to form compressed image data having an overall compression factor is described. The data compression apparatus comprises luminance compression means 12', 64, 18', 20' for compressing the luminance portion of the input image data by a luminance compression factor and chrominance compression means 12'', 66, 18'', 20'' for compressing the chrominance portion of the input image data by a chrominance compression factor. In response to a feedback signal 74 dependent on the overall compression factor a control means 76 coupled to the luminance compression means and the chrominance compression means controls the overall compression factor by varying the luminance compression factor, the chrominance compression factor and the ratio of the luminance compression factor to the chrominance compression factor. <IMAGE> |
