Dooley, Laurence S.; Buchwald, Wolf-Peter and Schmidt, Gunnar
An HDTV encoder for PALplus transmissions, supplemented with a digital residual signal.
In: 3rd IEEE International Conference on Signal Processing (ICSP '96), 14-18 Oct 1996, Beijing, China.
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This paper discusses the design of a video encoder which will enable PALplus compatible HDTV transmission, by embedding a digital residual component within the standard analogue PALplus television signal. The design strategy includes a 2-D diagonal prefilter, together with a QMF band-splitting filter pair, from which the residual is initially derived. The performance of these filters is reviewed, especially in respect of the errors introduced by aliasing and crosstalk distortion. A number of different digital modulation techniques are then examined for the transmission of the residual signal and a qualitative appraisal of their effectiveness presented
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