Digital picture-in-picture decoder

Details Digital picture-in-picture decoder Digital picture-in-picture decoder

1995-06-05

1997-03-25

Britton, Howard W.

Television

Basic receiver with additional function

For display of additional information

348390, 348424, 348568, H04N 546

Patent

active

056149573

ABSTRACT:
Methods and apparatus for implementing a reduced cost HDTV/SDTV video decoder are disclosed. The described joint video decoder is capable of decoding HDTV pictures at approximately the resolution of standard definition television pictures and can be used to decode HDTV and/or SDTV pictures. The described video decoder may be used as part of a picture-in-picture decoder circuit for providing picture-in-picture capability without providing multiple full resolution video decoders. The reduction in decoder circuit complexity is achieved through the use of a plurality of data reduction techniques including the use of a preparser, downsampling, and truncating pixel values.

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A. Hoffmann, B. Macq and J.J. Quisquater, "Future Prospects of the Cable TV Networks, New Technologies and New Services", Laboratoire de Telecommunications et Teledetection, pp. 13-22.
International Standards Organization - Moving Picture Experts Group, Draft of Recommendation H.262,ISO/IEC 13818-1 titled "Information Technology - Generic Coding of Moving Pictures and Associated Audio", Nov. 1993.
International Standards Organization - Moving Picture Experts Group, Draft of Recommendation H.262,ISO/IEC 13818-2 titled "Information Technology - Generic Coding of Moving Pictures and Associated Audio", Nov. 1993.

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