Claims
- 1. A scan converting apparatus comprising:
- a video signal input terminal,
- an A/D converter connected to said video signal input terminal and which converts a video signal which is an input analogue signal including original scanning lines to a digital signal,
- a movement detector connected to the output of said A/D converter and which detects moving parts in the video signal,
- a brightness/chrominance signal separator connected to the output of said A/D converter and the output of said movement detector and which separates a brightness signal from the video signal,
- a scanning line interpolator connected to a brightness signal output of said brightness/chrominance signal separator and an output of said movement detector and which creates an interpolated scanning line between one original scanning line and another original scanning line of said plurality of original scanning lines,
- a scanning line converter connected to an original scanning line output of said scanning line interpolator and an interpolated scanning line output of said scanning line interpolator and for creating converted scanning lines between said one original scanning line and said interpolated scanning line, wherein each of said converted scanning lines has a weighted brightness relative to said one original scanning line and said interpolated scanning line, said original scanning lines, interpolated scanning lines, and converted scanning lines provided as interlaced video output signal,
- a subtitle signal processor connected to said brightness signal output of said brightness/chrominance signal separator and which extracts a subtitle signal from said video signal and which generates a subtitle signal output and a subtitle control signal output,
- a first synthesizer connected to said subtitle signal output of said subtitle signal processor, said subtitle control signal output of said subtitle signal processor, and said video output signal of said scanning line converter and synthesizes said subtitle signal output from said subtitle signal processor and said video output signal from said scanning line converter according to said subtitle control signal output from said subtitle signal processor to generate a further digital signal,
- a D/A converter connected to an output of said first synthesizer and converts said further digital signal to a further analogue signal, and
- a video signal output terminal which receives an output signal from said D/A converter.
- 2. A scan converting apparatus as recited in claim 1, wherein each converted scanning line includes a plurality of spots, wherein the scanning line converter assigns a brightness value to each one of said plurality of spots on each of said converted scanning lines corresponding to
- a) the distance from said spot on said converted scanning line to a respective spot on said one original scanning line; and
- b) the distance from said spot on said converted scanning line to a respective spot on said interpolated scanning line.
- 3. An improved scan converting apparatus of the type comprising a video signal input terminal, an A/D converter connected to said video signal input terminal and which converts a video signal which is an input analogue signal including original scanning lines to a digital signal, a movement detector connected to the output of said A/D converter and which detects moving parts in the video signal, a brightness/chrominance signal separator connected to the output of said A/D converter and the output of said movement detector and which separates a brightness signal from the video signal, a scanning line interpolator connected to a brightness signal output of said brightness/chrominance signal separator and an output of said movement detector and which creates an interpolated scanning line between one original scanning line and another original scanning line of said plurality of original scanning lines, and a scanning line converter connected to an original scanning line output of said scanning line interpolator and an interpolated scanning line output of said scanning line interpolator and for creating converted scanning lines between said one original scanning line and said interpolated scanning line, wherein each of said converted scanning lines has a weighted brightness relative to said one original scanning line and said interpolated scanning line, and said original scanning lines, interpolated scanning lines, and converted scanning lines are provided as interlaced video output signal, wherein the improvement comprises:
- a subtitle signal processor connected to said brightness signal output of said brightness/chrominance signal separator and which extracts a subtitle signal from said video signal and which generates a subtitle signal output and a subtitle control signal output,
- a first synthesizer connected to said subtitle signal output of said subtitle signal processor, said subtitle control signal output of said subtitle signal processor, and said video output signal of said scanning line converter and synthesizes said subtitle signal output from said subtitle signal processor and said video output signal from said scanning line converter according to said subtitle control signal output from said subtitle signal processor to generate a further digital signal,
- a D/A converter connected to an output of said first synthesizer and converts said further digital signal to a further analogue signal, and
- a video signal output terminal which receives an output signal from said D/A converter.
- 4. An improved scan converting apparatus as recited in claim 3, wherein each converted scanning line includes a plurality of spots and the scanning line converter assigns a brightness value to each one of said plurality of spots on each of said converted scanning lines corresponding to (1) the distance from said spot on said converted scanning line to a respective spot on said one original scanning line, and (2) the distance from said spot on said converted scanning line to a respective spot on said interpolated scanning line.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-213875 |
Aug 1992 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/105,034, filed Aug. 11, 1993, now patented, U.S. Pat. No. 5,471,249.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4636857 |
Achiha et al. |
Jan 1987 |
|
4954882 |
Kamemoto |
Sep 1990 |
|
5029001 |
Tanaka et al. |
Jul 1991 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
59-171387 |
Sep 1984 |
JPX |
87880 |
Apr 1988 |
JPX |
Continuations (1)
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Number |
Date |
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Parent |
105034 |
Aug 1993 |
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