Method and apparatus for video coding

An apparatus for video decoding, comprising:

• processing circuitry configured to:
• decode coding information for a current block of a current picture, the coding information indicating a coding mode for the current block being one of:
• an intra block copy (IBC) mode or a string copy mode;
• determine current vector information for a current unit of samples in the current block based on the coding mode for the current block and a history buffer, the history buffer being configured to store vector information of at least a block previously decoded in the IBC mode and a string previously decoded in the string copy mode;
• reconstruct the current unit of samples based on the current vector information;
• and
• store the current vector information in the history buffer in response to a determination that the current vector information is different from the vector information already stored in the history buffer, wherein the current vector information is determined to be different from a piece of the vector information already stored in the history buffer based on a size of the current unit of samples being different from a size of a block or a string corresponding to the piece of the vector information already stored in the history buffer.