Color television receiver for simultaneous display of plural programs
Interlace inversion corrector for a picture-in-picture video signal generator
Two-picture television receiver
High definition television receiver enabling picture-in picture display
Image processing system Patent #: 4984083
ApplicationNo. 821236 filed on 01/10/1992
US Classes:348/555, For receiving more than one format at will (e.g., NTSC/PAL)348/567Memory
ExaminersPrimary: Shepperd, John W.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04N 005/45
Foreign Application Priority Data1989-07-29 JP
AbstractA television display apparatus is disclosed for forming a small image area in accord with the television signal of a standard system within one portion of the region of a large image area on the screen in accord with the television signal of an HDTV system. The apparatus displays a picture in the small image area within the large area by locally substituting for a first signal to display on the screen a composite picture having a picture of a second signal nested in the picture of the first signal. The apparatus uses three field memories each having a video signal of the second television signal written therein with the cycle. Field detecting apparatus determines whether the video signal in each television signal is a signal form the first field or the second field. The field memory that is not being currently written and has a field which is identical to that of the video signal included in the first television signal being currently scanned is selected for the composite picture.