Dual-Mode Video Signal Processing for Seamless 2D to 3D Format Switching
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Solution Overview
Problem
Conventional television systems face challenges in seamlessly switching between channels with different video formats, particularly between 2D and 3D content, leading to unsynchronized transitions and user intervention requirements, such as putting on or taking off 3D glasses, resulting in poor video clarity and awkward user experiences.
Innovation Solution
A dual-mode television viewing system with a set-top box that includes a receiver, processing, and output portions, allowing for automatic conversion between 2D and 3D video formats, enabling smooth transitions without user action by using a switching mechanism to select and convert video formats based on available capabilities of the television unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional television systems switch between channels with different video formats (2D and 3D), then format conversion is achieved, but synchronization is lost and user intervention is required
Solution Approach 1:
The system performs preliminary detection of the incoming video signal format (2D or 3D) and pre-configures the processing pipeline before actual playback. The set-top box analyzes format indicators in the signal and prepares the appropriate decoding and rendering path in advance, ensuring seamless transition without synchronization loss or user intervention.
Solution Approach 2:
An intermediary format conversion layer is introduced between the source signal and the display output. This intermediate processing stage acts as a buffer that can handle both 2D and 3D formats, converting them to a standardized internal representation that maintains synchronization while enabling flexible format switching.
2Adaptability or versatility
If active shutter method is used for 3D display, then depth illusion is achieved, but synchronizing issues occur during format changes
Solution Approach 1:
The system implements self-service automatic format detection and switching mechanisms. The set-top box autonomously detects format changes in the incoming signal, determines the appropriate display mode (2D or 3D), and adjusts the active shutter synchronization accordingly without requiring the user to manually switch modes or put on/take off glasses.
Solution Approach 2:
A feedback loop is established where the system continuously monitors the incoming signal format indicators and adjusts the display mode and shutter synchronization in real-time. This closed-loop control ensures that format changes are detected and responded to automatically, maintaining synchronization and eliminating the need for user intervention during transitions.
3Adaptability or versatility
If format switching is performed without synchronization, then format flexibility is achieved, but video clarity deteriorates
Solution Approach 1:
The system performs preliminary format detection and buffer flushing operations before actual format switching occurs. By detecting the format change in advance and clearing the display buffer, the system ensures that the transition to the new format (2D or 3D) is clean and synchronized, preventing image artifacts and maintaining video clarity while preserving format switching flexibility.
Data Source
AI summary
A system is provided for use with a video input signal and a video unit. The video input signal can be one of a two dimensional video signal and a three dimensional video signal. The video unit can display a three dimensional video and a two dimensional video. The system includes a receiver portion, a processing portion, a switching portion and an output portion. The receiver portion can receive the video input signal. The processing portion can output a first signal in a first mode of operation and can output a second signal in a second mode of operation, wherein the first signal is based on the video input signal and the second signal is based on the video input signal. The switching portion can switch the processing portion from the first mode of operation to the second mode of operation. The output portion can provide an output signal to the video unit, wherein the output signal is based on the first signal when the processing portion operates in the first mode of operation and wherein the output signal is based on the second signal when the processing portion operates in the second mode of operation. The first signal includes a two dimensional video signal, whereas the second signal includes a three dimensional video signal.