Multimedia Quality Evaluation via Segmented Video Audio Analysis
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Solution Overview
Problem
Existing multimedia quality evaluation methods fail to accurately reflect the impact of packet loss on multimedia sequences and do not align with the subjective user experience, as they do not separately evaluate video and audio quality before combining them.
Innovation Solution
A method and apparatus that determine multimedia quality by calculating the reference quality and distortion value of both video and audio signals, using specific equations to combine these values and account for packet loss, thereby reflecting the subjective user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If video and audio quality are evaluated separately and combined using a polynomial formula, then the evaluation process is simplified, but the accuracy of reflecting packet loss impact on multimedia quality deteriorates
Solution Approach 1:
The patent segments the multimedia sequence into video sub-sequences and audio sub-sequences, evaluating each separately to capture their individual quality characteristics and packet loss impacts. This segmentation allows the system to maintain evaluation simplicity while improving accuracy by analyzing video and audio components independently before combining their quality metrics.
Solution Approach 2:
The patent introduces an intermediary variable representing packet loss impact that mediates between the separately evaluated video and audio qualities. This intermediary captures the joint impact of packet loss on multimedia quality, allowing the system to combine video and audio evaluations while accurately reflecting the overall packet loss effect through a dedicated quality impact variable.
2Productivity
If video and audio are evaluated separately before combining, then computational efficiency is improved, but the alignment with subjective user experience deteriorates
Solution Approach 1:
The patent introduces a quality impact variable as an intermediary that bridges separate video and audio evaluations with subjective user experience. This intermediary variable captures the combined effect of video and audio quality degradation, enabling computationally efficient separate evaluation while maintaining alignment with how users actually perceive multimedia quality during packet loss events.
3Measurement precision
If a comprehensive multimedia quality evaluation method is used that accounts for packet loss, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The patent divides the complex multimedia quality evaluation into segmented steps: obtaining video quality, obtaining audio quality, determining packet loss impact, and calculating final quality. This segmentation reduces system complexity by breaking down the comprehensive evaluation into manageable modular components that can be implemented independently and combined systematically.
Solution Approach 2:
The patent uses a quality impact variable as an intermediary to simplify the relationship between video quality, audio quality, and overall multimedia quality during packet loss. This intermediary abstracts the complex interactions into a manageable calculation framework, improving measurement accuracy while controlling system complexity through structured variable relationships.
Data Source
AI summary
The present invention discloses a method and an apparatus for evaluating multimedia quality. The method includes: obtaining reference quality of a video and final quality of the video of a multimedia sequence, and reference quality of an audio and final quality of the audio of the multimedia sequence; determining reference quality of the multimedia sequence according to the reference quality of the video and the reference quality of the audio; determining a distortion value of the multimedia sequence according to the reference quality of the video, the final quality of the video, the reference quality of the audio, and the final quality of the audio; and determining multimedia quality of the multimedia sequence according to the reference quality of the multimedia sequence and the distortion value of the multimedia sequence. The method and apparatus for evaluating multimedia quality according to embodiments of the present invention can directly reflect distortion of a multimedia sequence, accord with a subjective feeling of a person, and therefore can accurately and effectively evaluate the multimedia quality.