Multi-view codec with low-complexity encoding for Distributed Video Coding

作者：Ciobanu Lucian^*; Corte Real Luis

来源：Multimedia Tools and Applications, 2013, 64(3): 731-755.

DOI：10.1007/s11042-011-0970-3

• Distributed Video Coding (DVC)
• Distributed Source Coding (DSC)
• Wyner-Ziv (WZ)
• SSIM (Structural SIMilarity)
• Intra 4x4
• Intra 16x16
• Discrete Cosine Transform (DCT)
• CAVLC (Context-Adaptive Variable-Length Coding)
• Huffman Coding
• Coset Coding

The low-complexity encoding, as fundamental requirement of Distributed Video Coding, relies on performing the bulk of computation at decoder, including tasks as the generation of side information and particularly, inter-camera registration in the case of multi-view systems with complete-overlapped views and free motion of the cameras (e.g., video surveillance). In Ciobanu and Corte-Real (Multimedia Tools Appl 48(3):411-436, 2010) we introduced a codec-independent solution for such tasks at decoder. In this paper, we present a multi-view Wyner-Ziv codec (IWZ) designed for the architecture and scenarios from Ciobanu and Corte-Real (2010) (e.g., free motion of the cameras, no a priori knowledge of the instant camera positions, no feedback channel), based on transform domain (DCT), block-based coset coding. We aimed to achieve a compromise between the low encoder complexity and the rate-distortion performance. A detailed evaluation is presented for comparison with conventional coding (Intra 4x4 and Intra 16x16). Practical results show a better overall performance of the proposed codec at low bitrates.

• 出版日期2013-6