Encoding method, decoding method, and bitstream

An encoding method, performed by an encoder and comprising:

• determining first syntax element information;
• obtaining variable information in response to the first syntax element information indicating that a parity hiding technology is enabled for a sequence;
• determining second syntax element information in response to the variable information indicating that a segment satisfying a first preset coding mode exists in a current picture;
• and
• encoding an absolute value of a quantized coefficient of a current block based on the second syntax element information.

A method of transmitting a bitstream, comprising one of the following:

• decoding the bitstream by:
• parsing the bitstream to determine first syntax element information;
• obtaining variable information in response to the first syntax element information indicating that a parity hiding technology is enabled for a sequence;
• determining second syntax element information in response to the variable information indicating that a segment satisfying a first preset coding mode exists in a current picture;
• and
• determining an absolute value of a quantized coefficient of a current block, in response to determining, based on the second syntax element information, that a hidden quantized coefficient exists in the current block;
• or
• generating the bitstream by:
• determining the first syntax element information;
• obtaining the variable information in response to the first syntax element information indicating that the parity hiding technology is enabled for the sequence;
• determining the second syntax element information in response to the variable information indicating that a segment satisfying the first preset coding mode exists in the current picture;
• and
• encoding the absolute value of the quantized coefficient of the current block based on the second syntax element information.