A Novel Compression Technique for Multi-Camera Nodes through Directional Correlation

• Published in: International journal of distributed sensor networks Vol. 2015; no. 6; p. 539838
• Main Authors: Shaheen, Saima, Javed, M. Younus, Mufti, Muid, Khalid, Shehzad, Khanum, Aasia, Khan, Shoab A., Akram, M. Usman
• Format: Journal Article
• Language: English
• Published: London, England Hindawi Publishing Corporation 01.01.2015; SAGE Publications; Sage Publications Ltd. (UK); John Wiley & Sons, Inc; Wiley
• Subjects: Algorithms; Analysis; Compressing; Correlation; Data compression; Digital video; Engineering research; Frames; Image coding; Methods; Multimedia; Networks; Video compression
• ISSN: 1550-1329; 1550-1477; 1550-1477
• DOI: 10.1155/2015/539838

A major fraction of multimedia stream contents tends to be redundant and leads to wastage of storage capacity and channel bandwidth. In order to eliminate surplus data, standard video compression algorithms exploit spatial and temporal correlation present in video sequence. However, in case of a multisensor network, intersensor statistical redundancy is the most significant factor in acquiring efficient link utilization as well as making resultant findings valuable to the end user. In this paper, an extension to our previously proposed scheme has been presented to accomplish performance goals of a multisensor environment. Standard MPEG codec has been used to accomplish distributed motion compensation in prespecified directions known as directional correlation. Video frame correlation has been estimated locally at the camera node as well as across different nodes, defined as node communication strategies. Further, receiver feedback assists in quality control after reconstitution by decoder assessment. Results estimated have been analyzed for saving ratios and multimedia quality. Results analysis illustrates increased gains in frame quality and compression saving, achieved through reducing node displacement from the reference node NR.