Method, system, device for video data transmission and photographing apparatus

Abstract

A method for wirelessly transmitting video data from a photographing apparatus to a display apparatus includes: setting an acquisition resolution for the photographing apparatus to match a display resolution of the display apparatus; acquiring images by the photographing apparatus with the acquisition resolution and an acquisition frame rate; performing frame dropping processing on the images to obtain target video image frames; encoding the target video image frames to obtain encoded target video image frames having an encoded output frame rate, the encoded output frame rate being equal to a display frame rate of the display apparatus and lower than the acquisition frame rate of the photographing apparatus; and transmitting the encoded target video image frames to the display apparatus.

What is claimed is: 
     
         1 . A method for wirelessly transmitting video data from a photographing apparatus to a display apparatus, comprising:
 setting an acquisition resolution for the photographing apparatus to match a display resolution of the display apparatus;   acquiring images by the photographing apparatus with the acquisition resolution and an acquisition frame rate;   performing frame dropping processing on the images to obtain target video image frames;   encoding the target video image frames to obtain encoded target video image frames having an encoded output frame rate, the encoded output frame rate being equal to a display frame rate of the display apparatus and lower than the acquisition frame rate of the photographing apparatus; and   transmitting the encoded target video image frames to the display apparatus.   
     
     
         2 . The method according to  claim 1 , wherein performing the frame dropping processing on the images to obtain the target video image frames includes:
 extracting the target video image frames from the images by equal interval extraction.   
     
     
         3 . The method according to  claim 1 , wherein performing the frame dropping processing on the images to obtain the target video image frame includes:
 fusing a preset number of adjacent video image frames of the images to obtain one of the target video image frames by image fusion.   
     
     
         4 . The method according to  claim 1 , further comprising:
 from optional frame rates corresponding to the set acquisition resolution determined according to a corresponding relation between resolutions and frame rates of the photographing apparatus, selecting a maximum frame rate as the acquisition frame rate.   
     
     
         5 . The method according to  claim 1 ,
 wherein the photographing apparatus is arranged on a movable device,   the method further comprising:
 obtaining state information of the movable device; and 
 adjusting the acquisition frame rate according to the state information. 
   
     
     
         6 . The method according to  claim 5 , wherein adjusting the acquisition frame rate according to the state information includes:
 increasing the acquisition frame rate in response to the state information indicating that a scenario in which the movable device is located changes; or   decreasing or maintaining the acquisition frame rate in response to the state information indicating that the scenario in which the movable device is located does not change.   
     
     
         7 . The method according to  claim 6 , wherein:
 determining that the scenario changes includes determining that the scenario changes in response to an amount of change in the state information is greater than a threshold; or   determining that the scenario does not change includes determining that the scenario does not change in response to the amount of change in the state information is not greater than the threshold.   
     
     
         8 . The method according to  claim 5 , wherein the state information includes at least one of a speed, an angle of turning, or an altitude. 
     
     
         9 . The method according to  claim 1 , wherein setting the acquisition resolution for the photographing apparatus to match a display resolution of the display apparatus includes:
 in response to a maximum resolution supported the photographing apparatus being equal to or greater than the display resolution of the display apparatus, setting the acquisition resolution of photographing apparatus to be equal to the display resolution of the display apparatus; and   in response to the maximum resolution supported the photographing apparatus being lower than the display resolution of the display apparatus, setting the acquisition resolution of photographing apparatus to be equal to maximum resolution.   
     
     
         10 . A photographing apparatus comprising:
 a camera;   a processor coupled to the camera and configured to:
 set an acquisition resolution of the camera to match a display resolution of a display apparatus; 
 control the camera to acquire images with the acquisition resolution and an acquisition frame rate; 
 perform frame dropping processing on the images to obtain target video image frames; and 
 encode the target video image frames to obtain encoded target video image frames having an encoded output frame rate, the output frame rate being lower than the acquisition frame rate; and 
   a transmitter coupled to the processor and configured to transmit the encoded target video image frames to the display apparatus.   
     
     
         11 . The photographing apparatus according to  claim 10 , wherein the processor is further configured to:
 extract the target video image frames from the images by equal interval extraction.   
     
     
         12 . The photographing apparatus according to  claim 10 , wherein the processor is further configured to:
 fuse a preset number of adjacent video image frames of the images to obtain one of the target video image frames by image fusion.   
     
     
         13 . The photographing apparatus according to  claim 10 , wherein the processor is further configured to:
 from optional frame rates corresponding to the set acquisition resolution determined according to a corresponding relation between resolutions and frame rates of the photographing apparatus, select a maximum frame rate as the acquisition frame rate.   
     
     
         14 . The photographing apparatus according to  claim 10 , wherein:
 the photographing apparatus is arranged at a movable device; and   the processor is further configured to:
 obtain state information of the movable device; and 
 adjust the acquisition frame rate according to the state information. 
   
     
     
         15 . The photographing apparatus according to  claim 14 , wherein the processor is further configured to:
 increase the acquisition frame rate in response to the state information indicating that a scenario in which the movable device is located changes; or   decrease or maintain the acquisition frame rate in response to the state information indicating that the scenario in which the movable device is located does not change.   
     
     
         16 . The photographing apparatus according to  claim 15 , wherein the processor is further configured to:
 determine that the scenario in which the movable device is located changes in response to an amount of change in the state information being greater than a threshold; or   determine that the scenario in which the movable device is located does not change in response to the amount of change in the state information being not greater than the threshold.   
     
     
         17 . The photographing apparatus according to  claim 14 , wherein the state information includes at least one of a speed, an angle of turning, or an altitude. 
     
     
         18 . A photographing apparatus arranged at a movable device, the photographing apparatus comprising:
 a camera;   a processor coupled to the camera and configured to:
 obtain an altitude of the movable device; 
 adjust an acquisition frame rate of the camera according to the altitude; 
 control the camera to acquire images with the acquisition frame rate; 
 perform frame dropping processing on the images to obtain target video image frames; and 
 encode the target video image frames to obtain encoded target video image frames having an encoded output frame rate, the output frame rate being lower than the acquisition frame rate; and 
   a transmitter coupled to the processor and configured to transmit the encoded target video image frames to the display apparatus.   
     
     
         19 . The photographing apparatus according to  claim 18 , wherein the processor is further configured to:
 extract the target video image frames from the images by equal interval extraction.   
     
     
         20 . The photographing apparatus according to  claim 18 , wherein the processor is further configured to:
 fuse a preset number of adjacent video image frames of the images to obtain one of the target video image frames by image fusion.