Title :
A high-performance system for real-time video image compression applications
Author :
Wu, Chen-Mie ; Perng, Dah-Jyh ; Cheng, Wen-Tsung ; Ho, Jian-Shing
Author_Institution :
Dept. of Electron. Eng., Nat. Taiwan Inst. of Technol., Taipei, Taiwan
fDate :
2/1/1995 12:00:00 AM
Abstract :
A high-performance system, which consists of a PC-486, a motion-estimation processor, DCT/IDCT processor, an image grabber, and a camera, is presented for real-time video image compression applications. Also, the motion-estimation and DCT/IDCT processors operate at 12.5 MHz and act as backend processors for the PC-486 through the Vesa local-bus interface. The motion-estimation processor takes around 100 μs to finish computing the motion vector with a tracking range of -8~+7 for each 16×16 block, and, the DCT/IDCT processor takes around 10 μs to compete the two-dimensional DCT/IDCT for each 8×8 block. Totally, for each 256×256 image frame, the system presented takes around 25.6 ms and 10 ms for computing the motion vectors and two-dimensional DCT/IDCT coefficients individually. Therefore, its performance is already good enough for various real-time video image compression applications
Keywords :
data compression; discrete cosine transforms; image processing equipment; microcomputer applications; motion estimation; real-time systems; video coding; DCT/IDCT processor; PC-486; Vesa local-bus interface; backend processors; camera; high-performance system; image frame; image grabber; motion vector; motion-estimation processor; real-time video image compression; tracking range; two-dimensional DCT/IDCT coefficients; Cameras; Control systems; Discrete cosine transforms; Image coding; Motion control; Motion estimation; Real time systems; Tracking; Very large scale integration; Video compression;
Journal_Title :
Consumer Electronics, IEEE Transactions on
