Digital Audio Transmission using Quadrature Modulation of Television Carrier

Abstract

A digital audio signal transmission system in which hige-quality digital audio signals are multiplexed in the video carrier by using an quadrature modulation method is proposed. This system is fully compatible with the NTSC terrestrial television system. We have developed the new methods for this transmission system such as the dicode modulation, the line interleaveing and the line comb filtering to improve the compatibility with the existing NTSC system.