An Extended Definition Television System Using Quadrature Modulation of the Video Carrier with Inverse Nyquist Filter

1 August 1987

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Consumer Electronics

Vol. CE-33 (3), 173-180
https://doi.org/10.1109/tce.1987.290257

Abstract

A QUadrature Modulating Extended definition television system -QUME- , which enhances NTSC to higher definition , is proposed. The QUME system uses quadrature modulation of video carrier with inverse nyquist filter and creates an independent transmission channel (Bandwidth : 1MHz) without using additional channel resources. One of the features of QUME is that the multiplexed signal hardly interferes with the conventional TV receivers, and another is that there is no crosstalk between the multiplexed signal and the main NTSC signal. These features enable a wide aspect ratio image to be transmitted as well as high frequency components of luminance and/or chrominance signals, while keeping compatibility with the NTSC system.

Keywords

This publication has 5 references indexed in Scilit:

Compatible High Definition Television Broadcast Systems
IEEE Transactions on Broadcasting, 1987
Image Reconstruction in a Wide Aspect Ratio HDTV System
IEEE Transactions on Communications, 1986
A Compatible High-Definition Television System (SLSC) with Chrominance and Aspect Ratio Improvements
SMPTE Journal, 1985
Extended Definition TV Fully Compatible with Existing Standards
IEEE Transactions on Communications, 1984
High Definition Television Systems: Desirable Standards, Signal Forms, and Transmission Systems
IEEE Transactions on Communications, 1981

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