HK112396A - Method for transmitting a video signal - Google Patents
Method for transmitting a video signalInfo
- Publication number
- HK112396A HK112396A HK112396A HK112396A HK112396A HK 112396 A HK112396 A HK 112396A HK 112396 A HK112396 A HK 112396A HK 112396 A HK112396 A HK 112396A HK 112396 A HK112396 A HK 112396A
- Authority
- HK
- Hong Kong
- Prior art keywords
- disturbances
- additional data
- colour
- amplitude
- transmitted
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/007—Systems with supplementary picture signal insertion during a portion of the active part of a television signal, e.g. during top and bottom lines in a HDTV letter-box system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
- H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
- H04N11/16—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system
- H04N11/167—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system the chrominance signal alternating in phase, e.g. PAL-system a resolution-increasing signal being multiplexed to the PAL-system signal, e.g. PAL-PLUS-system
-
- 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
Abstract
In the letterbox colour television system, additional data are transmitted with an appreciably reduced amplitude for reasons of compatibility, low frequency components having a relatively high amplitude. This results, however, in a reduction in the signal-to-noise ratio and disturbances in synchronization occur in known television receivers. The amplitude of the additional data can be increased without the disturbances in synchronization that occur in known television receivers if the additional data are transmitted in the form of a vestigial sideband modulation of the colour carrier. The frequency response of known IF filters can be exploited advantageously to form a Nyquist flank on the colour carrier. If the phase used is a constant V-phase of the colour carrier, any disturbances in the compatible reception are advantageously slight.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4007092A DE4007092A1 (en) | 1990-03-07 | 1990-03-07 | TV video signal transmission system of letter-box type - modulates chrominance carrier by extra information signals using filters |
DE4021698A DE4021698A1 (en) | 1990-07-07 | 1990-07-07 | Letter-box colour television system |
Publications (1)
Publication Number | Publication Date |
---|---|
HK112396A true HK112396A (en) | 1996-07-05 |
Family
ID=25890851
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK112396A HK112396A (en) | 1990-03-07 | 1996-06-27 | Method for transmitting a video signal |
Country Status (17)
Country | Link |
---|---|
EP (1) | EP0518946B1 (en) |
JP (1) | JPH05505076A (en) |
KR (1) | KR100212384B1 (en) |
CN (1) | CN1027486C (en) |
AT (1) | ATE131336T1 (en) |
AU (1) | AU642725B2 (en) |
BR (1) | BR9106110A (en) |
DE (1) | DE59107039D1 (en) |
DK (1) | DK0518946T3 (en) |
ES (1) | ES2082199T3 (en) |
FI (1) | FI923975A0 (en) |
GR (1) | GR3018339T3 (en) |
HK (1) | HK112396A (en) |
HU (1) | HUT63724A (en) |
MY (1) | MY108674A (en) |
NO (1) | NO179350C (en) |
WO (1) | WO1991014346A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2099127T3 (en) * | 1990-06-06 | 1997-05-16 | Philips Electronics Nv | EXTENDED TELEVISION SYSTEM WITH MAILBOX PROCEDURE. |
DE4111979A1 (en) | 1991-04-12 | 1992-10-15 | Thomson Brandt Gmbh | DEVICE FOR IMAGE SIGNAL RECORDING AND / OR PLAYBACK |
EP0543038A1 (en) * | 1991-11-19 | 1993-05-26 | Samsung Electronics Co., Ltd. | Color-under chroma channel encoded with auxiliary signals |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3414452C1 (en) * | 1984-04-17 | 1985-10-10 | Robert Bosch Gmbh, 7000 Stuttgart | Method for compatibly transmitting a colour television signal containing additional information |
US4882614A (en) * | 1986-07-14 | 1989-11-21 | Matsushita Electric Industrial Co., Ltd. | Multiplex signal processing apparatus |
US5053859A (en) * | 1987-09-02 | 1991-10-01 | Scientific-Atlanta, Inc. | High definition B-MAC television signal transmission system |
DE3930964A1 (en) * | 1989-09-15 | 1991-03-28 | Thomson Brandt Gmbh | TELEVISION TRANSMISSION SYSTEM |
-
1991
- 1991-02-05 MY MYPI91000343A patent/MY108674A/en unknown
- 1991-03-02 EP EP91905643A patent/EP0518946B1/en not_active Expired - Lifetime
- 1991-03-02 AT AT91905643T patent/ATE131336T1/en not_active IP Right Cessation
- 1991-03-02 DE DE59107039T patent/DE59107039D1/en not_active Expired - Fee Related
- 1991-03-02 WO PCT/EP1991/000397 patent/WO1991014346A1/en active IP Right Grant
- 1991-03-02 JP JP3505399A patent/JPH05505076A/en active Pending
- 1991-03-02 DK DK91905643.2T patent/DK0518946T3/en active
- 1991-03-02 BR BR919106110A patent/BR9106110A/en not_active IP Right Cessation
- 1991-03-02 HU HU922674A patent/HUT63724A/en unknown
- 1991-03-02 KR KR1019920702152A patent/KR100212384B1/en not_active IP Right Cessation
- 1991-03-02 ES ES91905643T patent/ES2082199T3/en not_active Expired - Lifetime
- 1991-03-02 AU AU74554/91A patent/AU642725B2/en not_active Ceased
- 1991-03-06 CN CN91101356A patent/CN1027486C/en not_active Expired - Fee Related
-
1992
- 1992-09-04 NO NO923460A patent/NO179350C/en unknown
- 1992-09-04 FI FI923975A patent/FI923975A0/en unknown
-
1995
- 1995-12-08 GR GR950403458T patent/GR3018339T3/en unknown
-
1996
- 1996-06-27 HK HK112396A patent/HK112396A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO179350C (en) | 1996-09-18 |
ES2082199T3 (en) | 1996-03-16 |
HUT63724A (en) | 1993-09-28 |
FI923975A (en) | 1992-09-04 |
GR3018339T3 (en) | 1996-03-31 |
EP0518946A1 (en) | 1992-12-23 |
KR100212384B1 (en) | 1999-08-02 |
JPH05505076A (en) | 1993-07-29 |
DK0518946T3 (en) | 1996-02-12 |
DE59107039D1 (en) | 1996-01-18 |
MY108674A (en) | 1996-10-31 |
AU7455491A (en) | 1991-10-10 |
CN1027486C (en) | 1995-01-18 |
ATE131336T1 (en) | 1995-12-15 |
NO179350B (en) | 1996-06-10 |
EP0518946B1 (en) | 1995-12-06 |
FI923975A0 (en) | 1992-09-04 |
NO923460D0 (en) | 1992-09-04 |
NO923460L (en) | 1992-09-04 |
WO1991014346A1 (en) | 1991-09-19 |
AU642725B2 (en) | 1993-10-28 |
BR9106110A (en) | 1993-02-24 |
CN1054696A (en) | 1991-09-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |