The DSC-HDTV interference rejection system
1992; Institute of Electrical and Electronics Engineers; Volume: 38; Issue: 3 Linguagem: Inglês
10.1109/30.156670
ISSN1558-4127
Autores Tópico(s)Image and Video Quality Assessment
ResumoAn efficient system for rejection of NTSC interference in digital spectrum-compatible HDTV (DSC-HDTV) receivers is described. DSC-HDTV receivers operating in a terrestrial simulcast situation need operational immunity against NTSC cochannel interference. Reduced channel spacing and an NTSC signal 12-15 dB stronger than the DSC-HDTV signal cause serious interference into a DSC-HDTV receiver by an NTSC cochannel. Interference rejection can be provided by a receiver comb filter with nulls near all three NTSC carriers. The correlative action caused by the comb filter was complemented by digital precoding. >
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