Method and apparatus for image encoding/decoding

An apparatus to decode an image, comprising:

• at least one processor configured to
• generate a prediction block for a current block,
• decode information of a first block size and information indicating whether a skip of a transform process is applied, wherein the information of the first block size is determined by an encoder, and wherein whether the skip of the transform process is applicable is determined based on a comparison of the information of the first block size with a current block size,
• determine whether to perform an inverse transform on the current block based on the decoded information indicating whether the skip of the transform process is applied,
• perform the inverse transform on the current block to generate a residual block for the current block,
• reconstruct the current block based on the prediction block and the residual block, and
• apply filtering on the reconstructed current block,
• wherein the filtering comprises either one or both of deblocking filtering and sample adaptive offset (SAO) filtering.

A method of encoding an image, comprising:

• generating a prediction block for a current block;
• generating a residual block for the current block based on the prediction block;
• encoding the residual block;
• decoding the encoded residual block;
• reconstructing the current block based on the prediction block and the decoded residual block;
• and
• applying filtering on the reconstructed current block,
• wherein the filtering comprises either one or both of deblocking filtering and sample adaptive offset (SAO) filtering, and
• wherein the encoding of the residual block comprises
• determining information of a first block size, wherein whether a skip of a transform process is applicable is determined based on the information of the first block size compared with a current block size;
• determining whether to apply the skip of the transform process on the current block based on a comparison of the information of the first block size with a current block size;
• and
• performing a transform on the current block to encode the residual block.

An apparatus to encode an image, comprising:

• at least one processor, configured to
• generate a prediction block for a current block,
• generate a residual block for the current block based on the prediction block,
• encode the residual block,
• decode the encoded residual block,
• reconstruct the current block based on the prediction block and the decoded residual block, and
• apply filtering on the reconstructed current block,
• wherein the filtering comprises either one or both of deblocking filtering and sample adaptive offset (SAO) filtering, and
• wherein the encoding of the residual block comprises
• performing a transform on the current block based on information indicating whether a skip of a transform process is applied, and
• encoding information of a first block size and the information indicating whether the skip of the transform process is applied, wherein whether the skip of the transform process is applicable is determined based on a comparison of the information of the first block size with a current block size.