Video Quality Freeze Frame Parameter Generation
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Solution Overview
Problem
Existing methods for measuring video quality degradation due to frame freezing do not effectively account for the relative contributions of individual impairment events and often ignore the total accumulated duration of impairments relative to the video sequence, leading to incomplete quality assessment.
Innovation Solution
A method that identifies the most perceptually dominant impairment duration, transforms individual impairment durations into a temporal quality metric, and discards other durations, considering both individual and total accumulated durations, as well as their relative value to the video sequence, to generate a freeze frame parameter that reflects the overall quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all individual impairment events are integrated and summed to calculate overall quality degradation, then the measurement accounts for cumulative effects, but it fails to capture the relative perceptual dominance of different impairment durations
Solution Approach 1:
The patent segments the continuous distribution of impairment durations into discrete bins or ranges. Each bin represents a specific duration category (e.g., 1-5 frames, 6-10 frames). This segmentation allows the system to analyze and weight different duration categories separately, capturing the relative perceptual dominance of each segment while maintaining the cumulative effect through the aggregation of bin contributions to the overall quality metric.
2Measurement precision
If the total accumulated duration of impairments is considered relative to video sequence length, then the assessment becomes more comprehensive, but the complexity of the measurement process increases
Solution Approach 1:
The patent transforms the raw impairment data into a standardized quality metric by applying parameter transformations. The impairment duration is converted into a quality score using a predetermined function that maps duration values to perceptual quality impacts. This parameter transformation simplifies the complexity by providing a direct computational path from raw measurements to meaningful quality metrics, avoiding the need for complex multi-step analysis processes.
3Measurement precision
If only the most perceptually dominant impairment duration is selected, then the quality measure focuses on the most impactful factor, but individual impairment events are discarded without considering their cumulative effect
Solution Approach 1:
The patent merges two complementary approaches: selecting the most perceptually dominant impairment duration category and accumulating the total duration across all impairment events. The system identifies which duration bin has the highest perceptual impact weight, then combines this information with the total accumulated impairment duration as a separate factor. This merging ensures that both the relative dominance of specific duration types and the overall quantity of impairments contribute to the final quality metric.
Data Source
AI summary
This invention provides a parameter for use in assessing video quality based on temporal frame freezing for use in an apparatus and method for perceptual video quality measurement. The invention provides a method of generating a freeze frame parameter relating to the perceptual impact of frozen frames in a video signal comprising the steps of: identifying frozen frames; identifying a freeze event comprising a plurality of consecutive frozen frames, the freeze event having a duration in dependence upon the number of frozen frames in said sequence; defining a set of duration ranges; and generating a freeze frame parameter in dependence upon the number of freeze events having a duration falling within each duration range. Methods and apparatus for perceptual video quality measurement using the method are also provided.