No reference image quality assessment based decoder side inter prediction

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors of an encoder, cause the encoder to:

• determine first motion information, from a plurality of motion information, for a block;
• determine a residual block based on a difference between the block and a first prediction block that is based on the first motion information;
• for each respective motion information of the plurality of motion information:
• generate a reconstructed block based on:
• a prediction block generated for the respective motion information;
• and
• a reconstructed residual block based on the first motion information;
• and
• determine a visual quality of the reconstructed block without using the block as a reference;
• and
• determine, based on the visual qualities of the reconstructed blocks, second motion information, from the plurality of motion information, as a prediction of the first motion information determined for the block;
• and
• signal, in a bitstream, an indication of whether the first motion information is the same as the second motion information.

An encoder comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the encoder to:
• determine first motion information, from a plurality of motion information, for encoding a block;
• determine a residual block based on a difference between the block and a first prediction block based on the first motion information;
• for each respective motion information of the plurality of motion information:
• generate a reconstructed block based on:
• a prediction block generated for the respective motion information;
• and
• a reconstructed residual block based on the first motion information;
• and
• determine a visual quality of the reconstructed block without using the block as a reference;
• and
• determine, based on the visual qualities of the reconstructed blocks, second motion information, from the plurality of motion information, as a prediction of the first motion information determined for the block;
• and
• signal, in a bitstream, an indication reconstruction of the residual block determined based on the first motion information whether the first motion information is the same as the second motion information.