Title :
Modulation of conventional TV signals in all-digital CATV network head ends
Author :
Wenzel, Dietmar ; Speidel, Joachim
Author_Institution :
Inst. of Telecommun., Stuttgart Univ., Germany
fDate :
2/1/2000 12:00:00 AM
Abstract :
In this paper, a new digital intermediate frequency modulator for conventional TV signals using digital signal processing is presented. A composite colour video signal and two associated audio signals are converted into a digital composite TV signal with spectrum at intermediate frequency. The modulator is designed for the high quality requirements that exist in professional equipment for CATV head ends. The architecture of the digital modulator shown is optimized for an implementation with ASICs. The signal processing with reduced complexity is described in detail, the structures and the design of the filters are illustrated and the simulated results are presented
Keywords :
application specific integrated circuits; audio signal processing; cable television; computational complexity; digital signal processing chips; digital television; frequency modulation; modulators; optical communication equipment; optical fibre networks; optical modulation; video signal processing; ASIC; all-digital CATV network head ends; audio signals; colour video signal; complexity; conventional TV signals; digital composite TV signal; digital intermediate frequency modulator; digital modulator; digital signal processing; filters; high quality requirements; professional equipment; Fiber nonlinear optics; Finite impulse response filter; Intelligent networks; Nonlinear optics; Optical distortion; Optical modulation; Optical noise; Optical signal processing; Signal processing; TV;
Journal_Title :
Consumer Electronics, IEEE Transactions on
