Patent ID: 9635368
Date: 2017-04-25
CPC Classifications: H04N,H05K

Claim:
1. A method for decoding a video signal by a decoding apparatus, the method comprising: obtaining, by the decoding apparatus, split indication information for a transform block from the video signal based on a specific condition being satisfied, the split indication information indicating whether the transform block is split into four transform sub-blocks, each transform sub-block having a half horizontal size and a half vertical size of the transform block; based on the split indication information for the transform block having a first value, partitioning, by the decoding apparatus, the transform block into the four transform sub-blocks; and based on the split indication information for the transform block having a second value, obtaining, by the decoding apparatus, coded block flag information for the transform block from the video signal, the coded block flag information for the transform block indicating whether the transform block includes one or more transform coefficient information not equal to 0, and obtaining, by the decoding apparatus, a residual signal based on the coded block flag information for the transform block, wherein the specific condition includes: wherein, based on the split indication information having the first value, for each of the four transform sub-blocks, the decoding apparatus repeats a procedure comprising: obtaining, by the decoding apparatus, split indication information for a transform sub-block from the video signal, based on the split indication information for the transform sub-block having the first value, partitioning, by the decoding apparatus, the transform sub-block into four transform sub-sub-blocks, and based on the split indication information for the transform sub-block having the second value, obtaining coded block flag information for the transform sub-block from the video signal, the coded block flag information for the transform sub-block indicating whether the transform sub-block includes one or more transform coefficient information not equal to 0, and obtaining, by the decoding apparatus, a residual signal based on the coded block flag information for the transform sub-block.