US 12,470,764 B2
Wireless projection method, source end device, and destination end device
Xiaohua Jiang, Shenzhen (CN); and Zhijun Zhu, Shenzhen (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jun. 13, 2023, as Appl. No. 18/333,830.
Application 18/333,830 is a continuation of application No. PCT/CN2020/136221, filed on Dec. 14, 2020.
Prior Publication US 2023/0328306 A1, Oct. 12, 2023
Int. Cl. H04N 21/43 (2011.01)
CPC H04N 21/4302 (2013.01) 16 Claims
OG exemplary drawing
 
1. A wireless projection method, wherein the method comprises:
receiving a bitstream from a source end device, wherein the bitstream is obtained by encoding video data;
obtaining time information of the bitstream, wherein the time information indicates a first time point at which the source end device starts encoding the bitstream, a second time point at which a destination end device starts receiving the bitstream, a third time point at which the destination end device starts decoding the bitstream, or a fourth time point at which the destination end device completes decoding the bitstream; and
adjusting a display vertical synchronization (Vsync) signal of the destination end device based on the time information;
wherein the time information indicates the first time point at which the source end device starts encoding the bitstream; and the obtaining time information of the bitstream comprises:
extracting the first time point from the bitstream; and
the adjusting of the display Vsync signal of the destination end device based on the time information comprises:
obtaining a first reference delay, wherein the first reference delay is a reference delay between the first time point and a time point at which the destination end device completes decoding the bitstream;
obtaining a first time interval, wherein the first time interval is a delay between the first time point and a time point at which the destination end device starts displaying the video data; and
adjusting the display Vsync signal of the destination end device until a difference between the first reference delay and the first time interval is less than a first preset threshold.