Patent ID: 6754433
Filing Date: 2004-06-22
Classification: H04N

Abstract:
An image data recording and transmission apparatus for input image data having multiple frequency components, said apparatus comprising:data compressor means for separating said input image data into plural frequency components to produce frequency separated component data, said plural frequency components including a first range of frequencies defined by a bandwidth limited transmission format and a second range of frequencies outside said first range; recorder means for storing said frequency separated component data within said first range and substantially none of said frequency separated component data within said second range on a recording medium; interpolator means for interpolating said stored frequency separated component data read from said recording medium to produce reconstructed data; and transmission signal generator means for transmitting output image data in said bandwidth limited transmission format from said reconstructed data; wherein said stored frequency separated component data does not include any data derived from said frequency separated component data within said second range, wherein said data compressor means includes quantisation means for quantising said frequency separated component data only in said first range and wherein said interpolator means includes dequantisation means for dequantising said stored frequency separated component data.