Multimedia Device Play Mode Determination Using Dual Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multimedia devices face challenges in identifying the correct play mode for displaying frames, leading to deteriorated image quality due to incorrect frame rate conversion and cadence mismatch between film and video modes.
Innovation Solution
A multimedia device and method utilizing two different thresholds to determine the suitable play mode by calculating frame differences and selecting between film and video mode thresholds, enabling accurate mode switching based on global variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single threshold is used to determine play mode, then the device complexity is reduced, but the measurement precision of play mode identification deteriorates
Solution Approach 1:
The single threshold is segmented into two distinct thresholds: a first threshold for film mode determination and a second threshold for video mode determination. This segmentation allows each threshold to be optimized for its specific play mode, improving identification accuracy without requiring complex adaptive threshold systems.
Solution Approach 2:
Different thresholds are applied to different play mode determination scenarios. The first threshold is specifically tuned for film mode characteristics while the second threshold is optimized for video mode characteristics, allowing each local determination process to use the most appropriate threshold value.
2Productivity
If frame rate conversion is performed without correct play mode identification, then the processing speed is maintained, but the image quality deteriorates
Solution Approach 1:
The play mode is determined in advance before frame rate conversion is performed. By first identifying whether the input signal is in film mode or video mode and selecting the appropriate threshold, the system ensures that subsequent frame rate conversion operations use the correct parameters, maintaining both speed and image quality.
Solution Approach 2:
The system uses the determined play mode information as feedback to guide the frame rate conversion process. The play mode identification result feeds back into the frame rate conversion parameters selection, ensuring that the conversion process adapts to the input signal characteristics and maintains image quality.
Data Source
AI summary
A multimedia device and a play mode determination method of the same are provided. The multimedia device includes a frame difference calculation unit, a global threshold determination unit and a play mode determination unit. The frame difference calculation unit calculates the frame difference between two continuous frames to obtain a global variation. The global threshold determination unit determines a film mode threshold corresponding to a film mode and a video mode threshold corresponding to a video mode according to a current frame of the two frames and a previous global variation, and selects a global threshold from the film mode threshold and the video mod threshold. The selected threshold is smaller than the film mode threshold. The play mode determination unit compares the global variation with the global threshold, and enables the multimedia device to enter one of the film mode and the video mode according to the comparison result.