CA2053593A1 - Methode et dispositif pour reduire le brouillage co-canal dans un recepteur tvhd - Google Patents
Methode et dispositif pour reduire le brouillage co-canal dans un recepteur tvhdInfo
- Publication number
- CA2053593A1 CA2053593A1 CA2053593A CA2053593A CA2053593A1 CA 2053593 A1 CA2053593 A1 CA 2053593A1 CA 2053593 A CA2053593 A CA 2053593A CA 2053593 A CA2053593 A CA 2053593A CA 2053593 A1 CA2053593 A1 CA 2053593A1
- Authority
- CA
- Canada
- Prior art keywords
- channel interference
- reducing
- signal
- hdtv
- hdtv receiver
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/0803—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division using frequency interleaving, e.g. with precision offset
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/24—High-definition television systems
- H04N11/28—High-definition television systems involving bandwidth reduction, e.g. subsampling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
Abstract
Le brouillage dans le même canal NTSC est réduit dans un récepteur TVHD en créant un signal brouilleur représentatif des éléments à haute énergie d'un signal NTSC, puis en soustrayant le signal brouilleur du signal TVHD reçu pour produire un signal TVHD amélioré pour fins de traitement.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/600,457 US5121208A (en) | 1990-10-19 | 1990-10-19 | Method and apparatus for reducing co-channel interference in an HDTV receiver |
US600,457 | 1990-10-19 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2053593A1 true CA2053593A1 (fr) | 1992-04-20 |
CA2053593C CA2053593C (fr) | 1997-10-14 |
Family
ID=24403676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002053593A Expired - Lifetime CA2053593C (fr) | 1990-10-19 | 1991-10-16 | Methode et dispositif pour reduire le brouillage co-canal dans un recepteur tvhd |
Country Status (2)
Country | Link |
---|---|
US (1) | US5121208A (fr) |
CA (1) | CA2053593C (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2779212B2 (ja) * | 1989-07-17 | 1998-07-23 | 株式会社日立製作所 | ワイド画面/標準画面テレビジョン信号受信装置 |
US5325204A (en) * | 1992-05-14 | 1994-06-28 | Hitachi America, Ltd. | Narrowband interference cancellation through the use of digital recursive notch filters |
US5325188A (en) * | 1992-05-14 | 1994-06-28 | Hitachi America, Ltd. | Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters |
US5282023A (en) * | 1992-05-14 | 1994-01-25 | Hitachi America, Ltd. | Apparatus for NTSC signal interference cancellation through the use of digital recursive notch filters |
US5400084A (en) * | 1992-05-14 | 1995-03-21 | Hitachi America, Ltd. | Method and apparatus for NTSC signal interference cancellation using recursive digital notch filters |
US5283653A (en) * | 1992-05-22 | 1994-02-01 | Zenith Electronics Corp. | Dual HDTV/NTSC receiver using sequentially synthesized HDTV and NTSC co-channel carrier frequencies |
US5453797A (en) * | 1993-02-22 | 1995-09-26 | Massachusetts Institute Of Technology | Method and apparatus for decoding broadcast digital HDTV in the presence of quasi-cyclostationary interference |
US5841491A (en) * | 1993-10-14 | 1998-11-24 | Envision Medical Corp. | Fiberscope enhancement system |
US5651010A (en) * | 1995-03-16 | 1997-07-22 | Bell Atlantic Network Services, Inc. | Simultaneous overlapping broadcasting of digital programs |
US5822324A (en) * | 1995-03-16 | 1998-10-13 | Bell Atlantic Network Services, Inc. | Simulcasting digital video programs for broadcast and interactive services |
US5852612A (en) * | 1995-03-16 | 1998-12-22 | Bell Atlantic Network Services, Inc. | Terminal for receiving simulcast digital video programs |
US20070064156A1 (en) * | 2005-09-19 | 2007-03-22 | Mediatek Inc. | System and method for removing co-channel interference |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4794447A (en) * | 1986-11-17 | 1988-12-27 | North American Philips Corporation | Method and apparatus for transmitting and receiving a high definition NTSC compatible television signal over a single DBS channel in time division multiplex form |
US4870489A (en) * | 1987-07-23 | 1989-09-26 | Ducret Robert P | NTSC compatible HDTV transmission system |
US4837611A (en) * | 1988-02-03 | 1989-06-06 | Faroudja Y C | Wideband NTSC-compatible transmission system with noise reduction processing |
GB8804720D0 (en) * | 1988-02-29 | 1988-03-30 | Rca Licensing Corp | Compatible widescreen tv |
US4907069A (en) * | 1988-06-01 | 1990-03-06 | Zenith Electronics Corporation | Two-channel compatible HDTV system |
US4918515A (en) * | 1988-06-20 | 1990-04-17 | Faroudja Y C | Compatible television transmission system with separate preemphasis path within single channel |
US4916525A (en) * | 1988-08-29 | 1990-04-10 | Hughes Aircraft Company | High definition TV system |
-
1990
- 1990-10-19 US US07/600,457 patent/US5121208A/en not_active Expired - Lifetime
-
1991
- 1991-10-16 CA CA002053593A patent/CA2053593C/fr not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2053593C (fr) | 1997-10-14 |
US5121208A (en) | 1992-06-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry | ||
MKEX | Expiry |
Effective date: 20111016 |