Systems and methods for synchronizing frame timing between physical layer frame and video frame

Abstract

A video processing method includes determining a first time point corresponding to a frame header of a video frame, determining a time period for processing at least a portion of the video frame, determining a second time point based on the first time point and the time period, adjusting a third time point corresponding to a frame header of a physical layer frame to synchronize the third time point with the second time point, and starting to transmit the video frame at the second time point.

We claim: 
     
         1 . A video processing method comprising:
 determining a first time point corresponding to a frame header of a video frame;   determining a time period for processing at least a portion of the video frame;   determining a second time point based on the first time point and the time period;   adjusting a third time point corresponding to a frame header of a physical layer frame to synchronize the third time point with the second time point; and   starting to transmit the video frame at the second time point.   
     
     
         2 . The method of  claim 1 , wherein processing the at least a portion of the video frame includes:
 compressing data associated with the video frame.   
     
     
         3 . The method of  claim 1 , further comprising:
 segmenting the video frame into a plurality of sub-frames;   wherein processing the at least a portion of the video frame includes compressing a sub-frame of the plurality of sub-frames.   
     
     
         4 . The method of  claim 3 , wherein:
 determining the time period includes determining a period for compressing the sub-frame according to a length of the sub-frame and a compression algorithm used for compressing the sub-frame; and   the time period includes the period for compressing the sub-frame.   
     
     
         5 . The method of  claim 4 , wherein:
 determining the time period further includes determining a period for adding redundancy check bits to the compressed sub-frame; and   the time period further includes the period for adding the redundancy check bits.   
     
     
         6 . The method of  claim 1 , further comprising:
 generating the physical layer frame at the second time point.   
     
     
         7 . The method of  claim 1 , wherein the frame header of the video frame corresponds to a frame synchronization pulse signal. 
     
     
         8 . The method of  claim 1 , wherein the video frame is extracted from a real-time video stream transmitted by a video recording device. 
     
     
         9 . The method of  claim 1 , wherein the video frame is extracted from a real-time video received at a data interface communicatively connected to a video recording device. 
     
     
         10 . The method of  claim 1 , further comprising:
 obtaining a frame rate of the video frame; and   configuring a frame rate of the physical layer frame based on the frame rate of the video frame.   
     
     
         11 . The method of  claim 10 , wherein the frame rate of the physical layer frame is an integer multiple of the frame rate of the video frame. 
     
     
         12 . The method of  claim 1 , wherein adjusting the third time point corresponding to the frame header of the physical layer frame includes:
 adjusting a length of the physical layer frame; or   adjusting an internal reading of a timer corresponding to the frame header of the physical layer frame.   
     
     
         13 . A system comprising:
 a memory storing one or more computer-executable instructions; and   one or more processors configured to communicate with the memory and execute the one or more computer-executable instructions to:
 determine a first time point corresponding to a frame header of a video frame; 
 determine a time period for processing at least a portion of the video frame; 
 determine a second time point based on the first time point and the time period; 
 adjust a third time point corresponding to a frame header of a physical layer frame to synchronize the third time point with the second time point; and 
 start to transmit the video frame at the second time point. 
   
     
     
         14 . The system of  claim 13 , wherein the one or more processors are further configured to execute the one or more computer-executable instructions to:
 compress data associated with the video frame.   
     
     
         15 . The system of  claim 13 , wherein the one or more processors are further configured to execute the one or more computer-executable instructions to:
 segment the video frame into a plurality of sub-frames; and   compress a sub-frame of the plurality of sub-frames.   
     
     
         16 . The system of  claim 15 , wherein:
 the one or more processors are further configured to execute the one or more computer-executable instructions to determine a period for compressing the sub-frame according to a length of the sub-frame and a compression algorithm used for compressing the sub-frame; and   the time period includes the period for compressing the sub-frame.   
     
     
         17 . The system of  claim 16 , wherein:
 the one or more processors are further configured to execute the one or more computer-executable instructions to determine a period for adding redundancy check bits to the compressed sub-frame; and   the time period further includes the period for adding the redundancy check bits.   
     
     
         18 . The system of  claim 13 , wherein the one or more processors are further configured to execute the one or more computer-executable instructions to:
 generate the physical layer frame at the second time point.   
     
     
         19 . The system of  claim 13 , wherein the one or more processors are further configured to execute the one or more computer-executable instructions to adjust the third time point by:
 adjusting a length of the physical layer frame; or   adjusting an internal reading of a timer corresponding to the frame header of the physical layer frame.   
     
     
         20 . A non-transitory computer readable medium storing executable instructions that, when executed by at least one processor, cause the at least one processor to:
 determine a first time point corresponding to a frame header of a video frame;   determine a time period for processing at least a portion of the video frame;   determine a second time point based on the first time point and the time period;   adjust a third time point corresponding to a frame header of a physical layer frame to synchronize the third time point with the second time point; and   start to transmit the video frame at the second time point.