发明名称 |
Adaptive transform method based on in-screen prediction and apparatus using the method |
摘要 |
Disclosed is an adaptive transform method based on an in-screen prediction, and an apparatus using the method. A method for encoding an image can comprise a step of determining in-screen prediction mode groups, and a step of transforming by using a different transform method according to the in-screen prediction mode group. As a result, transforming can be performed by applying the different transform method according to the in-screen prediction mode group. |
申请公布号 |
US9294774(B2) |
申请公布日期 |
2016.03.22 |
申请号 |
US201214353287 |
申请日期 |
2012.08.01 |
申请人 |
KT CORPORATION |
发明人 |
Lee Bae Keun;Kwon Jae Cheol;Kim Joo Young |
分类号 |
H04N19/11;H04N19/12;H04N19/593;H04N19/159;H04N19/44;H04N19/176;H04N19/122;H04N19/129 |
主分类号 |
H04N19/11 |
代理机构 |
IP Legal Services, LLC |
代理人 |
IP Legal Services, LLC |
主权项 |
1. A method of decoding a video signal having a current block to be decoded with a decoding apparatus, comprising:
obtaining quantized coefficients of the current block from the video signal; obtaining inverse-quantized coefficients of the current block by inverse-quantizing the quantized coefficients; obtaining, based on a transform skip flag specifying whether an inverse-transform is skipped for the current block, residual samples from the inverse-quantized coefficients of the current block, wherein when the transform skip flag is equal to 0, the residual samples are obtained by performing the inverse-transform for the inverse-quantized coefficients of the current block, and when the transform skip flag is equal to 1, the residual samples are obtained by skipping the inverse-transform for the inverse-quantized coefficients of the current block; determining, based on an least one of a prediction mode relating to the current block and a size of the current block, whether a transform type of the current block is discrete cosine transform (DCT) or a discrete sine transform (DST), the prediction mode indicating whether the current block is an intra-coded block or an inter-coded block; performing the inverse-transform for the inverse-quantized coefficients of the current block by using the determined transform type; and decoding the current block by using the residual samples. |
地址 |
Kyeonggi-do KR |