US 12,470,732 B2
Palette mode coding with designated bit depth precision
Cheng Chen, Milpitas, CA (US); Jingning Han, Santa Clara, CA (US); Hui Su, Sunnyvale, CA (US); and Yaowu Xu, Saratoga, CA (US)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Appl. No. 18/276,407
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Feb. 9, 2021, PCT No. PCT/US2021/017206
§ 371(c)(1), (2) Date Aug. 8, 2023,
PCT Pub. No. WO2022/173417, PCT Pub. Date Aug. 18, 2022.
Prior Publication US 2024/0305802 A1, Sep. 12, 2024
Int. Cl. H04N 19/00 (2014.01); H04N 19/14 (2014.01); H04N 19/176 (2014.01); H04N 19/186 (2014.01); H04N 19/44 (2014.01)
CPC H04N 19/44 (2014.11) [H04N 19/14 (2014.11); H04N 19/176 (2014.11); H04N 19/186 (2014.11)] 20 Claims
OG exemplary drawing
 
1. A method for decoding an encoded block from a bitstream, the method comprising:
reading, from the bitstream, a first value indicating a palette mode coding bit depth used to encode the encoded block;
reading, from the bitstream, a second value indicating whether to apply a bit offset to the palette mode coding bit depth;
generating a palette mode prediction block for the encoded block using a set of palette colors determined based on the first value and the second value, wherein, when the second value indicates to apply the bit offset, the set of palette colors is limited based on a maximum palette mode coding bit depth;
generating a reconstructed block using the palette mode prediction block; and
outputting the reconstructed block for storage or display.