Patent ID: 8254707

Claim:
An encoding apparatus for encoding image data, the apparatus including a processor and further comprising: an addition filter for filtering addition image data obtained by performing an addition operation on a first field and a second field, the first and second fields forming one frame of the image data, and generating a plurality of sub bands, containing addition coefficient data, segmented according to frequency band, a subtraction filter for filtering subtraction image data obtained by performing a subtraction operation between the first field and the second field, the first and second fields forming the one frame of the image data, and generating a plurality of sub bands, containing subtraction coefficient data, segmented according to frequency band, an intra encoder for generating addition encoded data by encoding the addition coefficient data and for generating subtraction encoded data by encoding the subtraction coefficient data, and an encoding multiplexer for generating encoded data by multiplexing the addition encoded data and the subtraction encoded data, wherein the intra encoder is configured to operate in, based on a determination, a first or second mode, the first mode including separately encoding the addition coefficient data and the subtraction coefficient data, each in a direction from an uppermost bit position to a lower bit position, and the second mode including integrally encoding the addition coefficient data and the subtraction coefficient data in a direction from an uppermost bit position to a lower bit position to generate encoded data, and the encoded data generated in the first or second mode is in a complete form for the one frame of the image data so that frames of the image data are encoded on a frame-by-frame basis.