The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	A hybrid low bit-rate video codec using subbands and statistical modeling
Author:	Cakrak, Ferhat
View Online:	njit-etd1994-069 (x, 110 pages ~ 3.3 MB pdf)
Department:	Department of Electrical and Computer Engineering
Degree:	Master of Science
Program:	Electrical Engineering
Document Type:	Thesis
Advisory Committee:	Akansu, Ali N. (Committee chair) Ansari, Nirwan (Committee member) Siveski, Zoran (Committee member)
Date:	1994-01
Keywords:	Image processing--Digital techniques. Data compression (Computer science). Coding theory. Motion--Analysis.
Availability:	Unrestricted
Abstract:	A hybrid low bit-rate video codes using subbands and statistical modeling is proposed in this thesis. The redundancy within adjacent video frames is exploited by motion estimation and compensation. The Motion Compensated Frame Difference (MCFD) signals are decomposed into 7 subbands using 2-D dyadic tree structure and separable filters. Some of the subband signals are statistically modeled by using the 2-D AR(1) technique. The model parameters provide a representation of these subbands at the receiver side with a. certain level of error. The remaining subbands are compressed employing a classical waveform coding technique, namely vector quantization (VQ). It is shown that the statistical modeling is a viable representation approach for low-correlated subbands of MCFD signal.The subbands with higher correlation are better represented with waveform coding techniques.