Patent ID: 7373007
Filing Date: 2008-05-13
Classification: G10L

Abstract:
1. An encoded data generation apparatus for generating encoded data by carrying out frequency conversion of an input image signal to a plurality of subbands, and carrying out bit plane encoding of each of the subbands, comprising: a selection unit to select low-order bit planes or low-order sub bit planes, and code corresponding to which are not to be output to the encoded data, based on a value (a) that is one of an inverse value of the square root of the gain of the inverse transform of the frequency conversion of each of the subbands; an inverse value of human vision sensitivity; and an inverse value of a product of the square root of the gain of the inverse transform and the human vision sensitivity of each of the subbands; wherein codes corresponding to greater numbers of the low-order bit planes or the low-order sub bit planes of each of the subbands are not output to the encoded data, the greater the value (a) of the subband is.