Patent ID: 8989262
Filing Date: 2015-03-24
Classification: H04N

Abstract:
1. A video decoding apparatus, comprising: a signal separator configured to determine whether a 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), and configured to determine whether the second block is transformed based on information indicating whether the block is not transformed, wherein the information is not signaled for the first block and is signaled for the second block; a dequantizer configured to dequantize the first block in a frequency domain and the second block in a space domain in response to the information indicating that the second block is not transformed, and to dequantize the first block and the second block in the frequency domain in response to the information indicating that the second block is transformed; a transformer configured to perform inverse-transform on the dequantized first block to generate a residual image block from the frequency domain to the space domain in response to the information indicating that the second block is not transformed, and to perform inverse-transform on the dequantized first block and the dequantized second block to generate the residual image block from the frequency domain to the space domain in response to the information indicating that the second block is transformed; and an image generator configured to construct an image to be decoded by combining residual image blocks from the first block with residual blocks from the second block.