Video Frame Rate Conversion for UAV Transmission Delay
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Solution Overview
Problem
Current video transmission systems from cameras on unmanned aerial vehicles suffer from significant delays due to the acquisition frame rate being equal to the display frame rate, which limits the overall video data transmission delay and instantaneity.
Innovation Solution
The method involves acquiring video images at a higher acquisition frame rate than the display frame rate, performing frame dropping or fusion to obtain target video image frames, and encoding them to match the display frame rate, thereby reducing the acquisition delay and ensuring reliable display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera acquires video images at the same frame rate as the display apparatus, then the display can show complete video frames, but the acquisition delay increases and real-time responsiveness deteriorates
Solution Approach 1:
The camera acquires video images at a higher frame rate than the display apparatus before the display needs them. This preliminary acquisition at accelerated speed reduces the acquisition delay, allowing the system to respond in real-time while still providing complete frames for display through subsequent frame rate conversion
Solution Approach 2:
The system changes the frame rate parameter dynamically - acquiring at a higher frame rate than the display apparatus uses. This parameter change allows reduction of acquisition delay while maintaining frame completeness for display through frame rate conversion processes
2Loss of time
If the camera increases the acquisition frame rate, then the acquisition delay reduces and real-time performance improves, but the data transmission volume and processing complexity increase
Solution Approach 1:
The system extracts only the necessary frames from the high-frame-rate acquisition sequence for display. By selecting specific frames at the display apparatus frame rate from the higher-rate acquisition stream, the system reduces processing complexity and data transmission volume while maintaining real-time performance benefits
Solution Approach 2:
The system performs excessive action by acquiring at a higher frame rate than needed for display, then uses frame rate conversion to reduce to the appropriate level. This partial use of acquired data (only displaying every Nth frame) balances real-time performance improvement with reduced processing complexity
Data Source
AI summary
A method for video data transmission includes acquiring images based on 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 lower than the acquisition frame rate, and transmitting the encoded target video image frames to a display apparatus.