Video Quality Estimation Using Sigmoid Function Parameters
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Solution Overview
Problem
Current technologies fail to precisely estimate video quality based on encoding bit rate, resolution, and frame rate, which are crucial for designing and managing video distribution services.
Innovation Solution
A video quality estimation apparatus and method that calculates a video quality value using a maximum value calculator, inflection point calculator, and video quality calculator, employing a sigmoid function to quantify user-perceived video quality based on encoding bit rate, resolution, and frame rate, with coefficients optimized for accurate convergence and inflection points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If encoding bit rate is lowered to compress video data, then data transmission efficiency is improved, but video quality degrades due to deformation and fading in blocks
Solution Approach 1:
The patent changes the parameters of the sigmoid function (maximum value, inflection point) based on resolution and frame rate to accurately model the relationship between encoding bit rate and video quality. This allows precise estimation of video quality at different bit rates, enabling optimization of the compression quality trade-off.
2Measurement precision
If video quality is precisely estimated based on encoding bit rate, resolution, and frame rate, then service design and management accuracy is improved, but calculation complexity increases
Solution Approach 1:
The patent uses parameter changes of the sigmoid function based on resolution and frame rate to achieve accurate video quality estimation. By adjusting the maximum value and inflection point parameters according to video properties, the system maintains high estimation accuracy without requiring complex calculation models.
3Measurement precision
If sigmoid function parameters are optimized based on resolution and frame rate, then video quality estimation accuracy is improved, but computational overhead increases
Solution Approach 1:
The patent performs preliminary calculation of the sigmoid function parameters (maximum value and inflection point) based on resolution and frame rate. These pre-calculated parameters are then used in the video quality estimation, reducing the computational overhead during actual quality assessment while maintaining high accuracy.
Data Source
AI summary
A video quality estimation apparatus used for an encoded video, to estimate a video quality value being a value quantifying a video quality being quality of the video felt by a user when viewing and listening to the video. The apparatus includes a maximum value calculator to calculate a maximum value of the video quality value from a resolution of the video and a frame rate of the video, and a video quality calculator to calculate an estimated video quality value corresponding to an encoding bit rate having been input, based on a predetermined relationship between the encoding bit rate of the video and the video quality value. The predetermined relationship is a relationship in which the video quality value increases while the encoding bit rate increases, and the video quality value converges on the maximum value calculated by the maximum value calculator.