Patent · US Expired

Apparatus and method for combining digital and analog television signals

US6278498A · kind A · utility

12Cited by
11References
21Claims
0Family size

Assignee

Inventor

Key dates

Filing dateApr 1, 1998
Grant dateAug 21, 2001
Priority date
Expiry dateApr 1, 2018

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N5/38
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

An adjacent channel combiner combines an analog television channel with an upper adjacent digital television channel using practical filter designs. An aural signal of the analog television channel is combined after both a visual signal and a digital signal have been combined. A directional filter combines the visual and digital signals and a diplexer or other means is used for combining the aural signal with the combined visual and digital signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.