Patent ID: 11882315
Assignee: INDUSTRY ACADEMY COOPERATION FOUNDATION OF SEJONG UNIVERSITY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of decoding an image, the method comprising:
receiving a bitstream including coefficient information of a current transform block, the coefficient information including absolute value information of a current transform coefficient in the current transform block, the absolute value information indicating whether an absolute value of the current transform coefficient is greater than 3; and
entropy-decoding the absolute value information of the current transform coefficient from the bitstream,
wherein entropy-decoding the absolute value information of the current transform coefficient comprises:
determining probability information of the absolute value information of the current transform coefficient based on significant coefficient flag information of neighboring transform coefficients of the current transform coefficient, the significant coefficient flag information indicating whether a neighboring transform coefficient is non-zero or not; and
decoding the absolute value information of the current transform coefficient based on the probability information,

wherein the neighboring transform coefficients include coefficients with coordinates of (x+2, y), (x+1, y+1), and (x, y+2), and
wherein x and y are representative of coordinates of the current transform coefficient.