Techniques for improved deblocking filtering

One or more non-transitory computer-readable media storing instructions that, when executed by one or more processors, cause the one or more processors to perform the steps of:

• receiving a first set of samples and a second set of samples of a first image;
• performing, based on sample values on one or more sides of a block boundary between the first set of samples the second set of samples, one or more evaluations relative to one or more thresholds, wherein the one or more evaluations comprise two or more second derivatives for two or more lines of the first image;
• determining, based on the one or more evaluations, a first number of samples to modify on a first side of the block boundary, wherein the first number is different from a second number of samples to modify on a second side of the block boundary;
• and
• performing, based on the first number of samples and the second number of samples, asymmetrical deblocking filtering on the first image to generate a second image.

A system, comprising:

• one or more memories storing instructions;
• and
• one or more processors that are coupled to the one or more memories and, when executing the instructions, are configured to:
• receive a first set of samples and a second set of samples of a first image;
• perform, based on sample values on one or more sides of a block boundary between the first set of samples the second set of samples, one or more evaluations relative to one or more thresholds, wherein the one or more evaluations comprise two or more second derivatives for two or more lines of the first image;
• determine, based on the one or more evaluations, a first number of samples to modify on a first side of the block boundary, wherein the first number is different from a second number of samples to modify on a second side of the block boundary;
• and
• perform, based on the first number of samples and the second number of samples, asymmetrical deblocking filtering on the first image to generate a second image.