Video Signal Processing Device High Frame Rate Compression
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Solution Overview
Problem
Existing video display systems face challenges in maintaining high frame rates above 60 fps, leading to increased transmission and calculation burdens while compromising video quality due to limitations in encoding methods like MPEG, which affect the S/N ratio and compression ratio.
Innovation Solution
A video signal processing device that encodes input video data of a first gradation into a second gradation with a lower bit number, using a quantizer, storage, difference calculator, and integrator to reduce gradation and reflect excluded information in subsequent frames, thereby reducing transmission and calculation loads while maintaining video quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a high frame rate (e.g., 960 fps) is applied to video, then delay in video display is reduced, but the amount of transmission and calculation increases
Solution Approach 1:
The video data is segmented into multiple gradations (first gradation with higher bit number and second gradation with lower bit number). The system transmits both gradations separately, allowing the high frame rate video to be divided into different data streams with different compression levels, thereby reducing the overall transmission and calculation burden while maintaining low delay
Solution Approach 2:
Different portions of the video data are processed with different quality levels. The first gradation data maintains higher quality with more bits, while the second gradation data uses fewer bits. This allows the system to handle high frame rate video by applying different processing intensities to different data components, reducing total calculation and transmission requirements
2Quantity of substance
If encoding processing is performed using methods like MPEG, then compression ratio is achieved, but S/N ratio decreases and compression ratio does not increase at higher frame rates
Solution Approach 1:
The video data is segmented into multiple gradations (first gradation with higher bit number and second gradation with lower bit number). The system transmits both gradations separately, allowing the high frame rate video to be divided into different data streams with different compression levels, thereby reducing the overall transmission and calculation burden while maintaining low delay
Solution Approach 2:
The system changes the bit number parameter by creating multiple gradations of the same video data. The first gradation uses a higher bit number for better quality, while the second gradation uses a lower bit number for more compression. This parameter change allows the system to achieve compression without severely degrading the S/N ratio, as the higher-precision first gradation data is still available
Data Source
AI summary
A video signal processing device is configured to include a quantizer that sequentially outputs quantized data obtained by quantizing input data based on the video data of the first gradation into the video data of the second gradation, a storage that sequentially stores the quantized data output from the quantizer, a difference calculator that sequentially calculates differences between the video data of the first gradation for a current frame and the quantized data for a previous frame stored in the storage, and an integrator that sequentially outputs integral data obtained by sequentially integrating data output from the difference calculator as the input data of the quantizer.