Compatible NTSC system with cross-talk-free multiplexing of luminance and chrominance

Stephane Coulombe; Eric Dubois

doi:10.1117/12.263198

10 January 1997 Compatible NTSC system with cross-talk-free multiplexing of luminance and chrominance

Stephane Coulombe, Eric Dubois

Proceedings Volume 3024, Visual Communications and Image Processing '97; (1997) https://doi.org/10.1117/12.263198
Event: Electronic Imaging '97, 1997, San Jose, CA, United States

Abstract

In this article, we present a new NTSC system based on multidimensional crosstalk-free transmultiplexer theory. The system is truly crosstalk-free and is compatible with existing television sets. The new encoded NTSC composite signal can be demodulated with slight degradation by a conventional television receiver, with some improvements by a comb-filter-equipped television and with best performance with the new decoder. We sue new sampling structures for luminance and chrominance signals in order to obtain near- perfect-reconstruction. The detailed structure of the proposed crosstalk-free NTSC system is presented. The NTSC encoder is composed of a decimation stage followed by a near-perfect-reconstruction transmultiplexer encoder. The NTSC encoder is composed of a decimation stage followed by a near-perfect-reconstruction transmultiplexer encoder. The NTSC decoder is composed of the transmultiplexer's decoder followed by an interpolation stage. We show structures of multidimensional two-channel FIR filter banks which allow near-perfect-reconstruction. Such structures lead to exactly zero crosstalk between luminance and chrominance signals. Special attention is given to the design of the filters in the system since they need to maintain compatibility with existing receivers. A design example and comparison with existing NTSC systems are presented.

Citation Download Citation

Stephane Coulombe and Eric Dubois "Compatible NTSC system with cross-talk-free multiplexing of luminance and chrominance", Proc. SPIE 3024, Visual Communications and Image Processing '97, (10 January 1997); https://doi.org/10.1117/12.263198

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