Residual and coefficients coding for video coding

An apparatus for video encoding, comprising:

• one or more processors;
• and
• a memory configured to store instructions executable by the one or more processors;
• wherein the one or more processors, upon execution of the instructions, are configured to perform acts comprising:
• signaling, by an encoder, a Sequence Parameter Set (SPS) rice extension flag that indicates whether an extension of rice parameter derivation for binarization of abs_remainder and dec_abs_level is used;
• and
• signaling, by the encoder, a general constraint information (GCI) rice extension flag, in GCI syntax to provide general control of the SPS rice extension flag,
• wherein abs_remainder is coded with Golomb-rice code and bypass-coded bins in a second pass in response to determining that remaining number of context-coded bins is greater than or equal to 4 while coding in a first pass;
• and
• wherein dec_abs_level is directly coded in the second pass using Golomb-Rice code and bypass-coded bins in response to determining that the remaining number of the context-coded bins is less than 4 while coding in the first pass.

A non-transitory computer-readable storage medium storing a bitstream generated by a method for video encoding executed by a processor, wherein the method for video encoding comprises:

• signaling, by an encoder, a Sequence Parameter Set (SPS) rice extension flag that indicates whether an extension of rice parameter derivation for binarization of abs_remainder and dec_abs_level is used;
• and
• signaling, by the encoder, a general constraint information (GCI) rice extension flag, in GCI syntax to provide general control of the SPS rice extension flag,
• wherein abs_remainder is coded with Golomb-rice code and bypass-coded bins in a second pass in response to determining that remaining number of context-coded bins is greater than or equal to 4 while coding in a first pass;
• and
• wherein dec_abs_level is directly coded in the second pass using Golomb-Rice code and bypass-coded bins in response to determining that the remaining number of the context-coded bins is less than 4 while coding in the first pass.