ESCAPE COLOR CODING FOR PALETTE CODING MODE

摘要

Systems, methods, and instrumentalities are disclosed for escape color coding for palette coding mode. A video bitstream may be received. The video bitstream may comprise a quantization parameter (QP) and/or a quantized escape color value that corresponds to an escape color pixel. A scaled escape color value may be generated by scaling the quantized escape color value by a scaling factor. A left-shift parameter may be determined based on the QP. A left-shifted escape color value may be generated by left-shifting the scaled escape color value based on the left-shift parameter. A right-shifted escape color value may be generated by right-shifting the left-shifted escape color value based on a constant parameter. A reconstructed escape color value may be determined based on the right-shifted escape color value. The device may decode the video bitstream based on the reconstructed escape color value.

主权项

1. A method for decoding a video bitstream, the method comprising:
receiving a video bitstream comprising a quantization parameter and a quantized escape color value that defines an escape color; generating a scaled escape color value by scaling the quantized escape color value by a scaling factor; determining a left-shift parameter based on the quantization parameter; generating a left-shifted escape color value by left-shifting the scaled escape color value based on the left-shift parameter; generating a right-shifted escape color value by right-shifting the left-shifted escape color value based on a constant parameter; and determining a reconstructed escape color value based on the right-shifted escape color value.