Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
202 words
A method of coding and decoding a bidimensional signal, comprising the steps of: at a coding side (a) dividing a bidimensional input signal into rectangular blocks of a plurality of sizes; (b) providing window functions h AM (m) and h BN (n) on a direction and block size basis; (c) calculating, assuming that a block of interest has an M x N size, transformed signals Xp(i, i) from input signals xp(m, n) (m = 0, I, ..., 2M-I; n = 0, I, ..., 2N-I) by a transform equation: (d) transmitting block division information and said transformed signals to a decoding side; at said decoding side (e) providing window functions f AM (m) and f BN (n) corresponding to said window functions h AM (m) and h BN (n), respectively; (f) calculating, when a block size of said transformed signals sent from said coding side is M x N, inverse-transformed signals yp(m, n) of 2M x 2N points from said transformed signals by using a transform equation: (g) arranging said inverse-transformed signals according to said block division information sent from said coding side; and (h) adding, in a portion where a plurality of blocks overlap, said inverse-transformed signals to produce a decoded signal.
Claim 2
Independent Claim
202 words
A method of coding and decoding a bidimensional signal, comprising the steps of: at a coding side (a) dividing a bidimensional input signal into rectangular blocks of a plurality of sizes; (b) providing window functions h AM (m) and h BN (n) on a direction and block size basis; (c) calculating, assuming that a block of interest has an M x N size, transformed signals Xp(i, i) from input signals xp(m, n) (m = 0, I, ..., 2M-I; n = 0, I, ..., 2N-I) by a transform equation: (d) transmitting block division information and said transformed signals to a decoding side; at said decoding side (e) providing window functions f AM (m) and f BN (n) corresponding to said window functions h AM (m) and h BN (n), respectively; (f) calculating, when a block size of said transformed signals sent from said coding side is M x N, inverse-transformed signals yp(m, n) of 2M x 2N points from said transformed signals by using a transform equation: (g) arranging said inverse-transformed signals according to said block division information sent from said coding side; and (h) adding, in a portion where a plurality of blocks overlap, said inverse-transformed signals to produce a decoded signal.
Claim 3
Independent Claim
109 words
An apparatus for coding a bidimensional signal, comprising: means for dividing a bidimensional input signal into rectangular blocks of a plurality of sizes; and means having window functions h AM (m) and h BN (n) on a block size and direction basis for calculating, when a block of interest has an M x N size, transformed signals Xp (k, i) of M x N points from input signals xp (m, n) (m = 0, I, ..., 2M-I; n = 0, I, ..., 2N-I) of 2M x 2N points centering around said block of interest by using a transform equation: said block division information and said transformed signals being outputted.
Claim 4
Independent Claim
109 words
An apparatus for coding a bidimensional signal, comprising: means for dividing a bidimensional input signal into rectangular blocks of a plurality of sizes; and means having window functions h AM (m) and h BN (n) on a block size and direction basis for calculating, when a block of interest has an M x N size, transformed signals Xp (k, i) of M x N points from input signals xp (m, n) (m = 0, I, ..., 2M-I; n = 0, I, ..., 2N-I) of 2M x 2N points centering around said block of interest by using a transform equation: said block division information and said transformed signals being outputted.
Claim 5
Dependent Claim
107 words
An apparatus for decoding a bidimensional signal, comprising: means having window functions f AM (m) and f BN (n) corresponding respectively to window functions h AM (m) and h BN (n) recited in claim 2 for calculating, when transformed signals transmitted from a coding side have a block size of M x N, inverse-transformed signals yp (m, n) of 2M x 2N points from input transformed signals by using a transform equation: means for arranging said inverse-transformed signals according to block division information transmitted from said coding side and, in a portion where a plurality of blocks overlap, adding said inverse-transformed signals to produce a decoded signal.