Patent ID: 9148662
Filing Date: 2015-09-29
Classification: H04N

Abstract:
1. A video decoding method comprising: determining, based on first information, whether an encoded image includes at least one block which is not inverse-transformed, the first information indicating whether the encoded image includes at least one block which is not inverse-transformed; determining whether the current block is a first block with a size that is not a minimum size (4×4) or a second block with a size that is a minimum size (4×4); when the encoded image includes at least one block which is not inverse-transformed and the current block is the second block, obtaining, from a bitstream, second information indicating whether the current block is inverse-transformed or not, wherein the second information is not encoded for the first block and is encoded for the second block; dequantizing the current block, wherein the current block is dequantized in a frequency domain in response to the second information indicating the current block is inverse-transformed, and the current block is dequantized in a space domain in response to the second information indicating the current block is not inverse-transformed; generating a residual image relating to the current block by performing selectively the inverse-transform on the dequantized current block based on the second information, wherein the residual image is generated based on dequantization in the frequency domain and the inverse-transform in response to the second information indicating the current block is inverse-transformed, and the residual image is generated based on the dequantization in the space domain in response to the second information indicating the current block is not inverse-transformed; and constructing a decoded image using the residual image.