Method and apparatus for processing video signal

A method of decoding a video, the method comprising:

• decoding a coded block flag indicating whether at least one non-zero transform coefficient exists in a current block;
• decoding transform coefficients of the current block based on the coded block flag indicating that the at least one non-zero transform coefficient exists in the current block;
• obtaining inverse-quantized transform coefficients by performing inverse-quantization on the transform coefficients of the current block;
• determining, based on a transform skip flag indicating whether to skip inverse-transform, whether to skip the inverse-transform for the current block or not;
• obtaining residual samples of the current block by skipping or performing the inverse-transform on the inverse-quantized transform coefficients in the current block;
• and
• obtaining reconstruction sample by summing the residual samples and prediction samples,
• wherein, in response to a case where the current block is one of two partitions generated by binary-partitioning a coding block in either a horizontal direction or a vertical direction, the transform skip flag is not parsed from a bitstream and it is determined not to skip the inverse-transform for the current block.

A method of encoding a video, the method comprising:

• obtaining residual samples of a current block by subtracting prediction samples from original samples;
• obtaining transform coefficients by skipping or performing transform on the residual samples of the current block;
• obtaining quantized transform coefficients by performing quantization on the transform coefficients;
• encoding the quantized transform coefficients of the current block;
• encoding a coded block flag indicating whether a non-zero quantized transform coefficient exists in the current block,
• wherein it is determined whether to encode a transform skip flag indicating whether the transform is skipped or not, and
• wherein, in response to a case where the current block is one of two partitions generated by binary-partitioning a coding block in either a horizontal direction or a vertical direction, it is determined not to skip the transform for the current block and the transform skip flag is not encoded into a bitstream.

A non-transitory computer-readable medium for storing data associated with a video signal, comprising:

• a data stream stored in the non-transitory computer-readable medium, the data stream being encoded by an encoding method comprising:
• obtaining residual samples of a current block by subtracting prediction samples from original samples;
• obtaining transform coefficients by skipping or performing transform on the residual samples of the current block;
• obtaining quantized transform coefficients by performing quantization on the transform coefficients;
• encoding the quantized transform coefficients of the current block;
• and
• encoding a coded block flag indicating whether a non-zero quantized transform coefficient exists in the current block,
• wherein it is determined whether to encode a transform skip flag indicating whether the transform is skipped or not, and
• wherein, in response to a case where the current block is one of two partitions generated by binary-partitioning a coding block in either a horizontal direction or a vertical direction, it is determined not to skip the transform for the current block and the transform skip flag is not encoded into the data stream.