Patent ID: 11917320
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 4:
5. The method according to claim 1, wherein the overlaying the virtual card to the target audio-video stream data, comprises:
calculating average gray scale values of at least one image in the target audio-video stream data, wherein the average gray scale values correspond to each color channel of preset color channels respectively, adjusting chromaticity of the virtual card according to a proportion of the average gray scale values, and obtaining adjusted virtual card of the at least one speaker so as to enable a contrast between the chromaticity of the adjusted virtual card and a chromaticity of the at least one image to be greater than a preset value; and
overlaying an adjusted virtual card of the at least one speaker to the target audio-video stream data.