FI942296A - Procedure for improving the quality of video printing - Google Patents
Procedure for improving the quality of video printing Download PDFInfo
- Publication number
- FI942296A FI942296A FI942296A FI942296A FI942296A FI 942296 A FI942296 A FI 942296A FI 942296 A FI942296 A FI 942296A FI 942296 A FI942296 A FI 942296A FI 942296 A FI942296 A FI 942296A
- Authority
- FI
- Finland
- Prior art keywords
- chrominance
- quality
- equalising
- improvement
- frequency
- Prior art date
Links
Abstract
Method for improvement of the quality of video compression, in which a PAL video signal consists of a luminance signal Y and a chrominance signal C, where the amplitude of C is Usinωt+Vcosωt. The method involves the phases: - calculation of the mean value from four consecutive images of a PAL series, cycle, in relation to Y, U and V, - equalising of the horizontal chrominance by using a low- pass filter to reduce the noise of the chrominance line, at a frequency which is higher than the upper limit of the bandwidth f subscript o, - equalising of the vertical chrominance with a low-pass filter, by selecting as the cut-off frequency fp of the pass band the first zero position of C in order to reduce the side lobes, - improvement of the horizontal chrominance resolution by more precise use of the luminance information, - increasing of the saturation by conversion of RGB to HLS and back, and - compensation of the gamma-correction caused by the camera tape recorder. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI942296A FI98109C (en) | 1994-05-17 | 1994-05-17 | A method for improving the quality of video printing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI942296A FI98109C (en) | 1994-05-17 | 1994-05-17 | A method for improving the quality of video printing |
FI942296 | 1994-05-17 |
Publications (4)
Publication Number | Publication Date |
---|---|
FI942296A0 FI942296A0 (en) | 1994-05-17 |
FI942296A true FI942296A (en) | 1995-11-18 |
FI98109B FI98109B (en) | 1996-12-31 |
FI98109C FI98109C (en) | 1997-04-10 |
Family
ID=8540715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI942296A FI98109C (en) | 1994-05-17 | 1994-05-17 | A method for improving the quality of video printing |
Country Status (1)
Country | Link |
---|---|
FI (1) | FI98109C (en) |
-
1994
- 1994-05-17 FI FI942296A patent/FI98109C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FI98109B (en) | 1996-12-31 |
FI942296A0 (en) | 1994-05-17 |
FI98109C (en) | 1997-04-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG | Patent granted |
Owner name: TUMMAVUOREN KIRJAPAINO OY |
|
BB | Publication of examined application | ||
MM | Patent lapsed |