Title :
Block delta modulation for compression of surveillance video signals
Author :
Kim, Shih-Chieh ; Fan, Chih-Peng ; Jar-Ferr Yang ; Liu, Bin-Da ; Yang, David W K
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
8/1/1994 12:00:00 AM
Abstract :
This paper describes a new methodology for coding the surveillance video signals by means of delta modulation and statistical estimations. This codec is simpler than the CCITT MPEG or H.261 Recommendation and is more suitable for the usage in close-circuit TV (CCTV) systems. With the statistical characteristics resulting from the sequence of images in surveillance systems, the proposed compression scheme is based on 8×8 pixel blocks of temporal differences. According to a modal selection of blocks, each block is further coded in different modes: the BDM (block delta modulation), ABDM (adaptive block delta modulation), DCT and ZERO modes. From the simulation results, a compression ratio of 1:47 and a PSNR of 37 dB are obtained when the above hybrid coder is used to encode the lady and walking men sequences
Keywords :
closed circuit television; codecs; delta modulation; image coding; image sequences; video equipment; video signals; CCTV; DCT; PSNR; adaptive block delta modulation; block delta modulation; close-circuit TV systems; codec; coding; compression ratio; image sequence; simulation results; statistical characteristics; statistical estimations; surveillance video signals; temporal differences; video signal compression; Codecs; Delta modulation; Discrete cosine transforms; Image coding; PSNR; Pixel; Surveillance; TV; Transform coding; Video compression;
Journal_Title :
Consumer Electronics, IEEE Transactions on
