engleski

Flexible Motion Models for Scalable and High Definition Video Coding

In this chapter the technologies that enable efficient handling of the richest multimedia content - videos, are presented. Application of videos in multimedia system has become possible because of effective signal-processing methods that enable high data compression. Key technology for video compression is motion compensation which is in centre of this chapter. Here, a flexible motion model that is suitable for scalable and high definition video coding is presented. The motion model is based on the application of variable-size blocks which supports highly efficient motion compensation and high degree of adaptability to the input video. The presented model can be also represented in a layered way, thus, providing scalability of motion information. In order to efficiently compress such motion information, predictive coding and adaptive entropy coding are applied. In predictive coding motion information of the current block is predicted from adjacent blocks. The prediction error is subjected to entropy coding, which utilises information about adjacent blocks and/or the current block in creating contexts to provide improved probability estimates for arithmetic coding. Overall, the presented techniques are highly flexible and are suitable for next-generation multimedia applications.

High Definition, Scalability, Scalable Coding, Scalable Video Coding, Motion Tree Structure, Block Mode

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