Slide Presentation Video Indexing via Audio-Visual Relevance Scoring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multimedia presentations, particularly slide presentations, lack efficient organization and indexing, making it difficult for users to quickly access relevant information within the video content associated with slides, especially when time windows with minimal relevance or transient slides are included.
Innovation Solution
A computer-implemented method generates a linked index for slide presentation videos by analyzing the video to identify slides, determine time windows, and assign relevance scores, discarding irrelevant time windows and adjusting them based on audio analysis to associate links with meaningful segments, allowing users to access specific slide content efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all time windows in a slide presentation video are indexed, then complete coverage of the video content is achieved, but the index becomes cluttered with irrelevant or transient slides making it difficult to access meaningful information
Solution Approach 1:
The patent applies parameter changes by computing a relevance score for each time window based on multiple parameters including audio characteristics (speech presence, silence detection), slide duration, and temporal positioning. This quantitative transformation allows the system to objectively evaluate and filter time windows, retaining only those with relevance scores above a threshold, thus improving information quality while managing index complexity through systematic parameter-based evaluation
Solution Approach 2:
The patent implements local quality by adjusting time windows based on their specific characteristics rather than applying uniform indexing. Each time window is individually evaluated and modified - for example, extending time windows backward to capture slide introduction speech detected through audio analysis, or trimming windows with minimal relevance. This localized treatment ensures that each indexed segment has high informational quality while maintaining manageable index structure
2Loss of information
If time windows are extended to capture complete slide content, then information completeness is improved, but irrelevant or transient slides are also included reducing access efficiency
Solution Approach 1:
The patent uses parameter changes by establishing multiple threshold parameters for time window inclusion: minimum duration thresholds to filter transient slides, relevance score thresholds to exclude irrelevant segments, and temporal positioning criteria to ensure proper alignment with slide content. These parameter-based filters allow the system to extend time windows sufficiently to capture complete meaningful content while automatically excluding segments that don't meet the established criteria, thus balancing completeness with access efficiency
Solution Approach 2:
The patent applies preliminary action by pre-processing the video to detect speech boundaries and identify introduction segments before finalizing time window boundaries. By detecting audio characteristics in advance and adjusting time windows to include relevant introduction speech, the system ensures that each indexed segment is complete and meaningful before the indexing process concludes, preventing the need for later adjustments and improving overall access efficiency
3Measurement precision
If audio analysis is performed to adjust time windows, then synchronization with slide introductions is improved, but processing complexity increases
Solution Approach 1:
The patent replaces mechanical or manual time window adjustment with automated audio analysis processing. Instead of manually identifying slide introduction points or using simple timestamp markers, the system employs audio signal processing to automatically detect speech boundaries, identify introduction segments, and adjust time window boundaries accordingly. This substitution of automated acoustic analysis for manual or rule-based methods achieves high temporal accuracy while managing processing complexity through efficient audio feature extraction and pattern recognition algorithms
Data Source
AI summary
Techniques are disclosed for performing a computer-implemented processing of slide presentation videos to automatically generate index locations corresponding to particular slides within a slide presentation video. In embodiments, a slide presentation video is uploaded to a video processing system. The video processing system performs an image analysis to identify each slide within the slide presentation and determine a time window for each occurrence of each slide. An audio analysis is performed to adjust the time window to the start of a sentence that precedes the introduction of the slide. A user interface includes one or more selectable links associated with each slide that link to a corresponding location within the slide presentation video. Similarly, a processed slide presentation video includes selectable links to index to the corresponding slide of the presentation.