Variable Frame Rate Video Recording and Playback System
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Solution Overview
Problem
Conventional moving-image shooting and recording technologies face challenges in efficiently reproducing slow motion and quick motion videos without increasing the number of frames, leading to higher memory requirements and limitations in frame rate flexibility, especially when using electronic techniques.
Innovation Solution
The solution involves setting arbitrary frame rates for shooting and reproduction, recording information about both rates with video signals, and using inter-frame compression to reduce the amount of data recorded, allowing for flexible reproduction of slow motion and quick motion videos without altering the number of frames, and enabling proper reproduction at different frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If video signals are converted to 60 frames/second for recording to enable slow motion and quick motion reproduction, then frame rate flexibility is improved, but memory capacity requirements increase
Solution Approach 1:
The patent changes the parameter of frame rate from fixed to variable, allowing the system to adapt between different frame rates (e.g., 24fps for normal playback, 60fps for slow motion) without requiring permanent allocation of high-capacity memory for all possible frame rates simultaneously
Solution Approach 2:
The system dynamically adjusts the frame rate during recording and reproduction operations, transitioning between different frame rates based on the specific playback requirements (normal, slow motion, or quick motion) rather than maintaining a fixed frame rate configuration
2Quantity of substance
If conventional video coding compresses inter-frames to reduce recording amount, then storage requirements are reduced, but the ability to reproduce different frame rates is limited
Solution Approach 1:
The system performs preliminary frame rate conversion during the recording phase, converting video signals to the target frame rate before compression and storage. This preliminary action ensures that the compressed data can be directly reproduced at the desired frame rate without requiring complex post-processing
Solution Approach 2:
The patent introduces an intermediary frame rate conversion process that acts as a mediator between the original video signal and the compressed storage format, allowing the system to maintain frame rate flexibility while achieving efficient compression through proper timing and synchronization
3Manufacturing precision
If the number of frames is increased to enable slow motion reproduction, then slow motion quality is improved, but the time required for recording and processing increases
Solution Approach 1:
The system changes the frame rate parameter dynamically based on the reproduction requirement, using higher frame rates (e.g., 60fps) only when slow motion is needed and standard frame rates (e.g., 24fps) for normal playback, thereby optimizing quality without unnecessary time consumption
Data Source
AI summary
A shooting device includes a frame-rate setting section, a shooting section, and a recording section. The frame-rate setting section sets a frame rate at the shooting and a frame rate at the reproducing arbitrarily and independently. The shooting section shoots moving images at the shooting frame rate, and the recording section records video signals of the shot moving images together with information about the shooting frame rate and information about the reproducing frame rate, where both of the information are linked with the video signals.