MOTION COMPENSATION IN THE HADAMARD DOMAIN FOR VIDEO CONFERENCING.

Title: MOTION COMPENSATION IN THE HADAMARD DOMAIN FOR VIDEO CONFERENCING.
Identifier: AAI8713751
identifier: 8713751
Creator: COLEF, MICHAEL.
Contributor: Joseph Barba
Date: 1987
Language: English
Publisher: City University of New York.
Subject: Engineering, Electronics and Electrical
Abstract: The research presented here introduces an original technique to separate the NTSC composite signal into its components in the Hadamard transform domain, when sampled at four times the frequency of the color subcarrier and a phase angle of K x 12(DEGREES), K = 1, 2,... .;A motion detection, estimation and compensation algorithm is presented which takes advantage of the separation of the NTSC composite signal into its components in the Hadamard transform domain. This algorithm involves setting proper thresholds for the coefficients in the Hadamard transform domain in order to detect the motion and estimate the displacement of the blocks classified as changed. The thresholding process involves only the transform coefficients which contain most of the energy pertaining to the Y, I and Q component signals.;The bit rates obtained in this study are 54Kbps - 318Kbps appropriate for the low bit rate video conferencing systems. The reconstructed video images were subjectively evaluated and found to be of good "video conferencing" quality.
Type: dissertation
Source: PQT Legacy CUNY.xlsx
degree: Ph.D.
Program: Engineering