AVC to MVC Transcoder Using Inter-View Prediction
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Solution Overview
Problem
Current video compression technologies face challenges in efficiently transcoding Advanced Video Coding (AVC) bitstreams into Multiview Video Coding (MVC) bitstreams, particularly in leveraging inter-view prediction to enhance three-dimensional video communication and entertainment services.
Innovation Solution
A system and method for transcoding AVC bitstreams into MVC bitstreams using inter-view prediction, where non-anchor pictures are converted into anchor pictures, and inter-view reference pictures are utilized in motion estimation/mode decision functions, enabling the generation of MVC bitstreams representing different views of the same scene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If inter-view prediction is used to convert non-anchor pictures into anchor pictures, then the quality of three-dimensional video is improved, but the computational complexity increases
Solution Approach 1:
The patent performs motion estimation and mode decision using inter-view reference pictures during the transcoding process before final bitstream generation. By pre-computing these complex operations during transcoding rather than during playback, the system achieves high video quality while managing computational complexity through advance processing
Solution Approach 2:
The patent introduces inter-view reference pictures as an intermediary element that facilitates prediction between different views. These reference pictures serve as a bridge that enables efficient inter-view prediction without requiring direct complex computations between all picture pairs, thus improving quality while managing computational load
2Productivity
If inter-view reference pictures are used in motion estimation/mode decision functions, then the compression efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent makes the MVC transcoder capable of handling both AVC and MVC bitstreams using a unified transcoding architecture. The same transcoder device processes multiple video coding standards and generates different output formats, reducing the need for separate dedicated devices for each standard while maintaining high compression efficiency through inter-view prediction
3Adaptability or versatility
If AVC bitstreams are transcoded to MVC bitstreams, then the adaptability for three-dimensional video services is improved, but the transcoding time increases
Solution Approach 1:
The patent changes the coding parameters and structure during transcoding from AVC to MVC format, enabling adaptation to three-dimensional video services. By efficiently managing these parameter changes and utilizing inter-view correlation, the system achieves format conversion while minimizing transcoding time through optimized processing of reference pictures and motion estimation
Data Source
AI summary
Systems, methods and computer program products for transcoding advanced video coding (AVC) bitstreams into multiview video coding (MVC) bitstreams are described. In some implementations, a MVC transcoder may be used to convert non-anchor pictures (e.g., at a specified temporal point) into anchor pictures by using only inter-view prediction. The MVC transcoder also may utilize inter-view reference pictures (in addition to temporal reference pictures) in the motion estimation/mode decision functions of the non-anchor pictures. The output of the MVC transcoder may be one or more MVC bitstreams each representing a different view of a same scene or image.