Graphics Subsystem 3D to 2D Mode Transition
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Solution Overview
Problem
The transition between stereoscopic 3D and non-stereoscopic 2D display modes in Blu-ray 3D formats often results in an unpleasant user experience due to flickering or shifting graphics, caused by the immediate switching of the graphics subsystem from 3D to 2D mode, which disrupts the display.
Innovation Solution
The method involves providing identical 2D data to both left and right channels of the graphics subsystem, allowing a smooth transition from 3D to 2D mode by maintaining the graphics subsystem in 3D mode and setting the disparities between channels to zero, ensuring no shift or minimal shift between 3D and 2D object positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the graphics subsystem immediately switches from 3D mode to 2D mode, then the display mode change is achieved quickly, but flickering and shifting occur in the graphical output
Solution Approach 1:
The patent applies preliminary action by preparing 2D data for both left and right channels before actually switching modes. When a mode change is requested, the system has already generated the appropriate 2D data for both channels, allowing it to immediately provide consistent 2D data to both channels during the transition, preventing flickering and shifting while maintaining fast switching.
2Device complexity
If the graphics subsystem switches to 2D mode by providing 2D data to only the left channel, then the transition is simple, but the display becomes unstable and flickers
Solution Approach 1:
The patent merges the 2D data provision to both left and right channels simultaneously. Instead of switching only the left channel or handling channels separately, the system provides identical 2D data to both channels during the transition period, ensuring stable display while maintaining simplicity in the switching mechanism.
3Ease of operation
If the graphics subsystem maintains 3D mode architecture while displaying 2D data, then the transition is smooth, but the system complexity increases
Solution Approach 1:
The graphics subsystem is designed with multi-functionality, capable of handling both 3D and 2D display modes using the same architectural framework. The system can provide stereoscopic 3D data or 2D data to both left and right channels as needed, eliminating the need for separate hardware paths and reducing overall system complexity while maintaining smooth transitions.
Data Source
AI summary
A method for operating a graphics subsystem of a reproduction device for display of video information comprising auxiliary information is described. Wherein the graphics subsystem is capable of generating left and right channel data for stereoscopic 3D display of auxiliary information in a 3D mode and of generating 2D data for 2D display of auxiliary information in a 2D mode, and can be switched between the display modes. The method has the steps of: providing 3D auxiliary information in the 3D mode, receiving a signal indicative to a change of the display mode, and leaving the graphics subsystem in the 3D mode while providing 2D auxiliary information to the graphics subsystem in response to said signal so as to provide the left and right channel with identical 2D auxiliary information to provide a 2D display of the same.