Video Control Device Frame Rate Conversion Logic
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Solution Overview
Problem
Liquid-crystal display devices face issues with moving picture blurring and increased costs due to the need for higher frame rates and increased bit lengths, which lead to higher memory capacity and power consumption.
Innovation Solution
A video control device and method that acquire and process frame data by quantizing pixels using logical formulas to generate interpolated frame data, temporarily holding and outputting it at a higher frame rate, reducing the number of bits required without increasing memory or power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame rate is increased to reduce moving picture blurring, then the image quality is improved, but the memory capacity and power consumption increase
Solution Approach 1:
The patent applies motion compensation technique in advance to generate interpolated frame data between input frames, thereby increasing the effective frame rate without requiring proportional increases in memory capacity. By pre-calculating and storing only essential motion information rather than complete high-frame-rate frames, the system achieves improved image quality while controlling memory requirements
Solution Approach 2:
The patent uses motion vectors to create copied and transformed versions of reference frame data to generate intermediate frames. Instead of storing complete high-frame-rate frames, the system creates interpolated frames by copying and transforming existing frame data based on detected motion, thereby achieving high frame rate effects with reduced memory capacity
2Reliability
If the bit length is increased to increase gray levels, then the image quality is improved, but the memory capacity and power consumption increase
Solution Approach 1:
The patent dynamically adjusts the bit depth and quantization precision based on the specific requirements of different frame data and motion characteristics. By changing the parameter of data precision adaptively rather than using fixed high bit depth for all data, the system achieves high image quality where needed while reducing power consumption for memory operations on less critical data
3Reliability
If the frame rate is increased through motion compensation, then the moving picture blurring is reduced, but the circuit complexity increases
Solution Approach 1:
The patent divides the frame rate conversion process into separate functional modules: motion vector detection, motion compensation, and frame interpolation. By segmenting the complex conversion process into distinct stages, each handling a specific aspect of the problem, the system achieves high frame rate conversion while making the overall circuit complexity manageable through modular design
4Productivity
If the data throughput is increased to accommodate higher frame rates, then the processing speed is improved, but the heat generation and power supply cost increase
Solution Approach 1:
The patent processes and transmits only the essential portions of frame data at high throughput rates, while using compression and interpolation techniques to reduce the volume of data requiring full-speed transmission. By applying partial processing at high speed and partial processing at lower speeds, the system achieves adequate effective throughput while reducing overall heat generation and power supply requirements
Data Source
AI summary
A first quantization unit quantizes data of each pixel constituting a first frame data by a first logical formula to generate a second frame data with a predetermined number of lower bits deleted. A delay memory temporarily holds the second frame data and outputs third frame data. Interpolation unit generates interpolated frame data located between adjacent frames in the second frame data by using the second frame data and the third frame data. A second quantization unit quantizes data of each pixel constituting the first frame data by a second logical formula different from the first logical formula to generate a fourth frame data with a predetermined number of lower bits deleted. A frame memory temporarily holds the fourth frame data and the interpolated frame data, and outputs the fourth frame data and the interpolated frame data alternately at a second frame rate higher than the first frame rate.