LM Mode with Uniform Bit-Width Multipliers

摘要

A video codec including a processor configured to generate a predicted chroma sample for a chroma block based on reconstructed luma samples located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block, and reconstructed chroma samples located in neighboring blocks of the chroma block and adjacent to the chroma block. Generating the predicted chroma sample includes computing a plurality of multipliers. Each of the plurality of multipliers has a bit width no greater than an input bit depth of the chroma block. Generating the predicted chroma sample does not require any multiplier that has a bit width greater than the input bit depth of the chroma block. A range of input parameters used to compute at least one of the multipliers is restrained by using the input bit depth as an exponent.

主权项

1. A video codec comprising:
a video input; a non-transitory memory comprising instructions; and one or more processors in communication with the video input and to the memory, wherein the one or more processors execute the instructions to: generate a predicted chroma sample for a chroma block based on:
a plurality of reconstructed luma samples located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block, anda plurality of reconstructed chroma samples located in neighboring blocks of the chroma block and adjacent to the chroma block, wherein generating the predicted chroma sample comprises computing a plurality of multipliers, wherein each of the plurality of multipliers has a bit width no greater than an input bit depth of the chroma block, and wherein generating the predicted chroma sample does not require any multiplier that has a bit width greater than the input bit depth of the chroma block, and wherein a range of input parameters used to compute at least one of the multipliers is restrained by using the input bit depth as an exponent.