Television – Basic receiver with additional function – Multimode
Reissue Patent
1998-05-18
2001-02-20
Kostak, Victor R. (Department: 2711)
Television
Basic receiver with additional function
Multimode
C348S402100, C348S443000
Reissue Patent
active
RE037057
ABSTRACT:
This is a reissue of Ser. No.
08
/
337
,
721
filed Nov.
14
,
1994
, U.S. Pat. No.
5
,
519
,
446
.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to the reception of a digital video signal, and more particularly to a digital video signal reception apparatus which is capable of displaying a high definition television (referred to hereinafter as HDTV) broadcasting signal on an existing TV receiver.
2. Description of the Prior Art
According to an HDTV standard of the U.S.A., a video signal can be encoded and decoded into various formats with no limitation to a single format. Namely, the video signal can be encoded and decoded into six formats, an interlaced scanning format with 1050 horizontal scanning lines and a frame rate of 60 Hz, progressive scanning formats with 1050 horizontal scanning lines and frame rates of 24 Hz and 30 Hz, and progressive scanning formats with 787.5 horizontal scanning lines and frame rates of 24 Hz, 30 Hz and 60 Hz.
Although the transmission formats of the video signal are varied as mentioned above, a display format of the video signal is limited to a single type depending on a characteristic of a monitor. This requires an HDTV receiver to have a video format conversion apparatus which is capable of converting any of the six video formats into the display format characteristic of the monitor. On the other hand, for the user with an existing non-high definition TV receiver, there may be required an apparatus which is capable of performing a video format conversion operation so that an HDTV broadcasting signal can be displayed on the existing non-high definitions TV receiver.
SUMMARY OF THE INVENTION
Therefore, the present invention has been made in view of the above problem, and it is an object of the present invention to provide a digital video signal reception apparatus which is capable of performing a video format conversion operation so that a received high definitions digital video signal can be displayed on an existing non-high definitions TV receiver.
In accordance with the present invention, the above and other objects can be accomplished by a provision of a digital video signal reception apparatus comprising multiplexer selection control means for outputting a plurality of control signals according to a format of a compressed input digital video signal; decoding means for decoding the compressed input digital video signal; frame rate conversion means for convening a frame rate of the decoded digital video signal from said decoding means into a desired value under the control of said multiplexer selection control means; first multiplexing means for selecting one of the deemed digital video signal from said decoding means and an output video signal from said frame rate conversion means under the control of said multiplexer selection control means; decimation means for performing a decimation operation to convert the number of horizontal scanning lines of an output video signal from said first multiplexing means into a desired value; display mode conversion means for performing a display mode conversion operation so that an output video signal from said decimation means can be displayed in a desired display mode; and display processing means for displaying an output video signal from said display mode conversion means on a screen of a monitor.
REFERENCES:
patent: 5187575 (1993-02-01), Lim
patent: 5262854 (1993-11-01), Ng
patent: 5365276 (1994-11-01), Imai
patent: 5371549 (1994-12-01), Park et al.
patent: 5384974 (1995-01-01), Bae
“IEEE Transaction on Consumer Electronics” vol. 35, #3, Aug. 1989.
Kostak Victor R.
LG Electronics Inc.
Long Aldridge & Norman LLP
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