Boundary Information Generation for 2D to 3D Video Switching
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Solution Overview
Problem
Conventional 3D broadcasting systems face challenges in accurately transmitting boundary information for switching between 2D and 3D video, leading to potential misinterpretation and synthesis of 3D video from different 2D sources, especially when using multiple broadcasting networks.
Innovation Solution
A boundary information providing apparatus generates and transmits precise boundary information using a transport level descriptor mode or video frame header information mode to distinguish between 2D and 3D video, ensuring accurate switching points are recognized by the video receiving apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If signaling channel (PMT, VCT, SI) is used to transmit boundary information, then transmission simplicity is improved, but boundary information accuracy deteriorates
Solution Approach 1:
The patent segments boundary information transmission into two parts: coarse boundary information transmitted via signaling channel (PMT, VCT, SI) for simplicity, and fine boundary information transmitted via frame headers for precision. This segmentation allows each channel to fulfill its strength while compensating for the other's weakness.
Solution Approach 2:
The patent introduces frame header information as an intermediary carrier to supplement the insufficient boundary information from the signaling channel. The frame header acts as a mediator that provides precise frame-level boundary markers, enabling accurate 2D-3D switching while maintaining the simplicity of signaling channel transmission.
2Measurement precision
If frame header is used to transmit boundary information, then boundary information accuracy is improved, but system complexity increases
Solution Approach 1:
The patent implements a dynamic boundary information transmission mechanism that adaptively selects between signaling channel and frame header based on the specific switching scenario. The system dynamically adjusts the information source according to whether coarse or fine boundary information is needed, optimizing complexity-performance tradeoff.
Solution Approach 2:
The patent performs preliminary transmission of boundary information through the signaling channel before actual 2D-3D switching occurs. This preliminary action provides advance notice of boundary locations, allowing the receiver to prepare for switching without requiring complex real-time analysis of frame headers during playback.
3Ease of operation
If descriptor information is used for 2D-3D identification, then transmission ease is improved, but switching timing precision deteriorates
Solution Approach 1:
The patent adds a temporal dimension to boundary information transmission by using frame headers that are synchronized with video frame timing. This temporal dimensionality allows precise switching timing to be derived from frame-level markers, complementing the transport-level descriptor information and eliminating timing ambiguity.
Data Source
AI summary
A boundary information providing apparatus may include a boundary information generation unit to generate boundary information of a video, the boundary information through which a switching point between a 2D video and a 3D video is recognized, based on a switching mode between the 2D video and the 3D video, and a stream transmission unit to transmit a stream including the boundary information to a video receiving apparatus.