Patent ID: 6804402
Filing Date: 2004-10-12
Classification: G06T

Abstract:
An image coding method comprising the steps of dividing an image into a plurality of blocks of pixels;transforming the blocks of pixels into respective blocks of transform coefficients in accordance with a two-dimensional DCT transform, wherein each block of transform coefficients is a 8Ã—8 block of coefficients having a DC transform coefficient and 63 AC transform coefficients; rearranging the transform coefficients into a plurality of groups, wherein a first group comprises the DC coefficients, a second group comprises AC01, AC10, and AC11 transform coefficients, a third group comprises AC02, AC03, AC12, AC13, AC20, AC21, AC30, AC31, AC22, AC23, AC32, and AC33 transform coefficients, a fourth group comprises AC04, AC05, AC06, AC07, AC14, AC15, AC16, AC17, AC24, AC25, AC26, AC27, AC34, AC35, AC36, AC37, AC40, AC50, AC60, AC70, AC41, AC51, AC61, AC71, AC42, AC52, A62, AC72, AC43, AC53, AC63, AC73, AC44, AC45, AC46, AC47, AC54, AC55, AC56, AC57, AC64, AC65, A66, AC67, AC74, AC75, AC76, and AC77 transform coefficients, where ACij is the AC component at the ith row and jth column of the block; and encoding the groups of coefficients by group, wherein each group is encoded such that a decoder is capable of decoding each group substantially independently of any other group.