Authors : D. Rukmani Devi, P . Rangarajan and Raja Paul Perinbam
Abstract: Cross Diamond Search (CDS) is one of the fast search Motion Estimation (ME) algorithm that caters to the requirement of video coding with relatively minimal limitations. It exploits the cross centre-biased motion vector characteristics in real-world video sequences. The performance of the CDS algorithm is relatively better, compared to that other of the fast search ME algorithms which use a number of search points and similar picture quality as parameters. The objective is to build a new architecture with high performance CDS which requires nine Processing Elements (PEs) to obtain the minimum SAD. The proposed architecture was designed to take advantage of the properties of the CDS algorithm. The study has shown that the CDS algorithm with an efficient architecture with minimum number of gates suitable for the ME algorithms in video coding standards could achieve the desired video output. The results observed after implementing comparative performance analysis have shown that the CDS architecture occupies 23% of logic elements, 1% of dedicated logic registers and consumes as low as 84.63 mW power when it is implemented using Altera Quartus II FPGA device.
D. Rukmani Devi, P . Rangarajan and Raja Paul Perinbam, 2014. Power Efficient Cross Diamond Search Architecture for Low Bit Rate Mobile Applications. International Journal of Soft Computing, 9: 122-130.