Scalable Video Coding for 3DTV Broadcasting Transmission
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Solution Overview
Problem
Existing in-band mobile broadcasting systems using scalable video coding cannot provide 3DTV service without additional data for different views, as they require separate base and additional videos, whereas scalable video coding hierarchically transmits the same view data, limiting their capability in convergent 3DTV services.
Innovation Solution
The method involves generating base video data by coding the additional video and creating enhanced layer data through correlation video coding between the base and additional videos, allowing for transmission and reception of 3DTV broadcasting without additional data, using a scalable video coder, where one video is selected as the base and the other as the additional video, and transmitting these layers through different channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If scalable video coding is used to transmit the same view data hierarchically, then bandwidth efficiency is improved, but 3DTV service capability deteriorates
Solution Approach 1:
The patent inverts the conventional approach by using the additional view as the base layer and the base view as the enhancement layer. This allows the system to transmit different views (enabling 3DTV) while still using scalable coding principles to maintain bandwidth efficiency. The inversion resolves the contradiction by showing that scalable coding can serve 3DTV purposes when the layer assignment is reversed from traditional practice.
Solution Approach 2:
The patent makes the scalable video coding system universal by enabling it to serve dual purposes: maintaining backward compatibility with 2D receivers (who receive only the base layer) and providing 3DTV service to advanced receivers (who receive both base and enhancement layers). This multi-functionality resolves the contradiction by demonstrating that the same scalable coding framework can achieve both bandwidth efficiency and 3DTV capability.
2Adaptability or versatility
If base video and additional video are independently coded in simulcast-based broadcasting, then 3DTV service is provided, but device complexity increases
Solution Approach 1:
The patent merges the base video and additional video coding processes into a single scalable video coding framework. Instead of independently coding both videos as in simulcast, the system codes the additional view as the base layer and the base view as the enhancement layer, combining what were previously separate coding operations into one unified scalable coding process. This reduces device complexity while maintaining 3DTV service capability.
3Adaptability or versatility
If additional data for additional video is transmitted, then 3DTV service is enabled, but transmission bandwidth increases
Solution Approach 1:
The patent changes the parameter of layer assignment by making the additional view the base layer and the base view the enhancement layer. This parameter change allows the system to transmit 3DTV service using the same bandwidth allocation structure, where the base layer (additional view) can be decoded independently and the enhancement layer (base view) provides the differential information needed for full 3D reconstruction, thereby enabling 3DTV without increasing transmission bandwidth.
Data Source
AI summary
An apparatus for transmitting 3DTV broadcasting generates base video data by coding additional video, generates enhanced layer data by coding a correlation video between the base video and a video decodable from the base layer stream, and transmits the base layer data and the enhanced layer data.