CA2056744A1 - System for recording and reproducing a wide bandwidth video signal via a narrow bandwidth medium - Google Patents
System for recording and reproducing a wide bandwidth video signal via a narrow bandwidth mediumInfo
- Publication number
- CA2056744A1 CA2056744A1 CA2056744A CA2056744A CA2056744A1 CA 2056744 A1 CA2056744 A1 CA 2056744A1 CA 2056744 A CA2056744 A CA 2056744A CA 2056744 A CA2056744 A CA 2056744A CA 2056744 A1 CA2056744 A1 CA 2056744A1
- Authority
- CA
- Canada
- Prior art keywords
- luminance
- motion
- component
- chrominance
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002131 composite material Substances 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000001228 spectrum Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Picture Signal Circuits (AREA)
- Television Signal Processing For Recording (AREA)
- Color Television Systems (AREA)
Abstract
An encoder processes a composite video signal including luminance and chrominance components into a folded limited bandwidth video signal including a low frequency luminance band component having a limited bandwidth and a high frequency luminance band component adaptively de-emphasized in amplitude and folded into the spectrum of the low frequency luminance band, along with a chrominance-plus-motion signal containing the chrominance component having encoded thereon a motion signal derived from and representative of image motion in the input video signal, and suitable for transmission or recording via a limited bandwidth video medium and compatibly reproducible by narrow bandwidth reproduction devices due to the de-emphasized folded high luminance band and encoding of the motion signal onto vacant portions of the chrominance component. A decoder converts the encoded signal into an unfolded wideband video signal including a baseband luminance signal containing the low band luminance component along with the unfolded high band luminance component re-emphasized to its original amplitude, together with the chrominance component signal separated from the encoded composite chrominance-plus-motion signal, whereby a full bandwidth image may be displayed. The motion signal is utilized in the encoder for motion-adaptively pre-filtering the input luminance and is recovered in the decoder for motion-adaptively post-filtering the unfolded luminance. The system can be applied to a narrowband VCR such as a VHS
format VCR for providing improved resolution images on implementing playback devices with backward compatibility on conventional playback devices.
format VCR for providing improved resolution images on implementing playback devices with backward compatibility on conventional playback devices.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US63519791A | 1991-01-02 | 1991-01-02 | |
| US07/635,197 | 1991-01-02 | ||
| US07/787,690 | 1991-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2056744A1 true CA2056744A1 (en) | 1992-07-03 |
| CA2056744C CA2056744C (en) | 1998-09-15 |
Family
ID=24546852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002056744A Expired - Fee Related CA2056744C (en) | 1991-01-02 | 1991-12-02 | System for recording and reproducing a wide bandwidth video signal via a narrow bandwidth medium |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR950000829B1 (en) |
| CA (1) | CA2056744C (en) |
-
1991
- 1991-12-02 CA CA002056744A patent/CA2056744C/en not_active Expired - Fee Related
- 1991-12-03 KR KR1019910022066A patent/KR950000829B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2056744C (en) | 1998-09-15 |
| KR920015922A (en) | 1992-08-27 |
| KR950000829B1 (en) | 1995-02-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |