FR2363250A1 - Circuit de traitement de signal video - Google Patents
Circuit de traitement de signal videoInfo
- Publication number
- FR2363250A1 FR2363250A1 FR7725973A FR7725973A FR2363250A1 FR 2363250 A1 FR2363250 A1 FR 2363250A1 FR 7725973 A FR7725973 A FR 7725973A FR 7725973 A FR7725973 A FR 7725973A FR 2363250 A1 FR2363250 A1 FR 2363250A1
- Authority
- FR
- France
- Prior art keywords
- circuit
- signal processing
- video signal
- processing circuit
- frequency
- 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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N5/923—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback using preemphasis of the signal before modulation and deemphasis of the signal after demodulation
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Amplifiers (AREA)
- Picture Signal Circuits (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
L'invention concerne l'enregistrement magnétique de signaux vidéo. Un étage amplificateur Q1 du circuit d'enregistrement d'un magnétoscope comporte un circuit de pré-accentuation 14 et un circuit de compression 15. Un étage d'amplification Q2 du circuit de reproduction comporte des circuits complémentaires 35 et 34. Cette configuration permet de réduire le bruit de modulation de fréquence, sans entraîner d'excursions de fréquences excessives du signal modulé en fréquence. Application aux magnétoscopes pour la télévision en couleur.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10128676A JPS5327010A (en) | 1976-08-25 | 1976-08-25 | Signal tran smitter |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2363250A1 true FR2363250A1 (fr) | 1978-03-24 |
FR2363250B1 FR2363250B1 (fr) | 1983-01-14 |
Family
ID=14296602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7725973A Granted FR2363250A1 (fr) | 1976-08-25 | 1977-08-25 | Circuit de traitement de signal video |
Country Status (9)
Country | Link |
---|---|
US (1) | US4198650A (fr) |
JP (1) | JPS5327010A (fr) |
AT (1) | AT382994B (fr) |
CA (1) | CA1099395A (fr) |
DE (1) | DE2737796C2 (fr) |
FR (1) | FR2363250A1 (fr) |
GB (1) | GB1579139A (fr) |
IT (1) | IT1079930B (fr) |
NL (1) | NL7709358A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2425187A1 (fr) * | 1978-05-02 | 1979-11-30 | Sony Corp | Appareil d'enregistrement et de reproduction d'un signal d'image |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55109892A (en) * | 1979-02-17 | 1980-08-23 | Tlv Co Ltd | Backet float type steam trap |
JPS55112491A (en) * | 1979-02-21 | 1980-08-30 | Tlv Co Ltd | Backet float type steam trap |
JPS55117712A (en) * | 1979-02-28 | 1980-09-10 | Matsushita Electric Ind Co Ltd | Noise reduction circuit of video signal recording and reproducing device |
US5424887A (en) * | 1980-03-05 | 1995-06-13 | Papst Licensing Gmbh | Disk storage drive |
US4445152A (en) * | 1980-09-02 | 1984-04-24 | Karlock James A | Video detail enhancing circuit |
US4402006A (en) * | 1981-02-23 | 1983-08-30 | Karlock James A | Image enhancer apparatus |
JPS57166786A (en) * | 1981-04-06 | 1982-10-14 | Sony Corp | Video signal processing circuit |
DE3269852D1 (en) * | 1981-10-14 | 1986-04-17 | Telefunken Fernseh & Rundfunk | Circuit for reducing the rise-time of the flanks of a video signal, in particular for a video recorder |
JPS6030295A (ja) * | 1983-07-29 | 1985-02-15 | Victor Co Of Japan Ltd | 搬送色信号の記録再生装置 |
US4700361A (en) * | 1983-10-07 | 1987-10-13 | Dolby Laboratories Licensing Corporation | Spectral emphasis and de-emphasis |
JPS611183A (ja) * | 1985-05-24 | 1986-01-07 | Hitachi Ltd | 録画装置 |
US5166805A (en) * | 1985-06-18 | 1992-11-24 | Pioneer Electronic Corporation | Disk player with a blanking during fast scanning |
JPS6250396U (fr) * | 1986-09-04 | 1987-03-28 | ||
US5126846A (en) * | 1988-08-08 | 1992-06-30 | Kabushiki Kaisha Toshiba | Non-linear amplifier and non-linear emphasis/deemphasis circuit using the same |
DE69126718T2 (de) * | 1990-03-07 | 1998-01-15 | Canon Kk | System zum Aufzeichnen und Wiedergeben eines Bildsignals |
US5386574A (en) * | 1991-07-26 | 1995-01-31 | Cybex Corporation | Temperature compensated extended range computer communications link |
US6008864A (en) * | 1995-06-21 | 1999-12-28 | Sony Corporation | Composite video signal backporch soft-clamp system using servo loop |
GB2423660B (en) * | 2005-02-25 | 2010-08-18 | Imagination Tech Ltd | A method and apparatus for controlling overshoot in a video enhancement system |
DE102008039351B3 (de) * | 2008-08-22 | 2010-01-28 | Osram Gesellschaft mit beschränkter Haftung | Schaltungsanordnung zum Betrieb mindestens einer Halbleiterlichtquelle |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3288930A (en) * | 1964-11-12 | 1966-11-29 | Winston Res Corp | Wide-band signal-translating channel |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3333055A (en) * | 1963-06-01 | 1967-07-25 | Fernseh Gmbh | Apparatus for increasing the signal-to-noise ratio of a television signal |
US3548323A (en) * | 1967-09-07 | 1970-12-15 | Gordon Eng Co | Non-linear mathematical signal conditioning system |
JPS4944535B1 (fr) * | 1970-01-26 | 1974-11-28 | ||
FI57502C (fi) * | 1971-04-06 | 1980-08-11 | Victor Company Of Japan | Kompressions- och expansionssystem |
JPS5227504B1 (fr) * | 1971-04-24 | 1977-07-20 | ||
GB1401336A (en) * | 1971-10-05 | 1975-07-16 | Victor Company Of Japan | Expander circuit for a compression and expansion system |
BE793740A (fr) * | 1972-01-08 | 1973-05-02 | Akai Electric | Systeme d'enregistrement magnetique |
GB1428963A (en) * | 1972-04-04 | 1976-03-24 | Dolby Laboratories Inc | Circuits for modifying the dynamic range of signals |
JPS5625072B2 (fr) * | 1974-01-12 | 1981-06-10 | ||
US4012771A (en) * | 1974-02-05 | 1977-03-15 | Sony Corporation | Apparatus for recording and/or reproducing color video signals |
US3944853A (en) * | 1974-08-12 | 1976-03-16 | Basf Aktiengesellschaft | Video recorder pre-emphasis, de-emphasis circuits |
-
1976
- 1976-08-25 JP JP10128676A patent/JPS5327010A/ja active Pending
-
1977
- 1977-08-03 GB GB32587/77A patent/GB1579139A/en not_active Expired
- 1977-08-04 CA CA284,127A patent/CA1099395A/fr not_active Expired
- 1977-08-16 US US05/825,170 patent/US4198650A/en not_active Expired - Lifetime
- 1977-08-22 DE DE2737796A patent/DE2737796C2/de not_active Expired
- 1977-08-23 IT IT50748/77A patent/IT1079930B/it active
- 1977-08-24 AT AT0613577A patent/AT382994B/de not_active IP Right Cessation
- 1977-08-24 NL NL7709358A patent/NL7709358A/xx not_active Application Discontinuation
- 1977-08-25 FR FR7725973A patent/FR2363250A1/fr active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3288930A (en) * | 1964-11-12 | 1966-11-29 | Winston Res Corp | Wide-band signal-translating channel |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2425187A1 (fr) * | 1978-05-02 | 1979-11-30 | Sony Corp | Appareil d'enregistrement et de reproduction d'un signal d'image |
Also Published As
Publication number | Publication date |
---|---|
DE2737796C2 (de) | 1986-06-05 |
IT1079930B (it) | 1985-05-13 |
DE2737796A1 (de) | 1978-03-09 |
US4198650A (en) | 1980-04-15 |
NL7709358A (nl) | 1978-02-28 |
JPS5327010A (en) | 1978-03-13 |
ATA613577A (de) | 1986-09-15 |
FR2363250B1 (fr) | 1983-01-14 |
AT382994B (de) | 1987-05-11 |
GB1579139A (en) | 1980-11-12 |
CA1099395A (fr) | 1981-04-14 |
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