SE7507386L - SYSTEM FOR PROCESSING A COMPOSITE FERTILE VISION SIGNAL. - Google Patents
SYSTEM FOR PROCESSING A COMPOSITE FERTILE VISION SIGNAL.Info
- Publication number
- SE7507386L SE7507386L SE7507386A SE7507386A SE7507386L SE 7507386 L SE7507386 L SE 7507386L SE 7507386 A SE7507386 A SE 7507386A SE 7507386 A SE7507386 A SE 7507386A SE 7507386 L SE7507386 L SE 7507386L
- Authority
- SE
- Sweden
- Prior art keywords
- separated
- mhz
- component
- chrominance component
- response
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/87—Regeneration of colour television signals
- H04N9/898—Regeneration of colour television signals using frequency multiplication of the reproduced colour signal carrier with another auxiliary reproduced signal, e.g. a pilot signal carrier
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
1519151 Television AMPEX CORP 19 June 1975 [28 June 1974 (2)] 26139/75 Heading H4F To eliminate timing errors from colour television signals of the NTSC type played back from a magnetic tape a luminance-coherent subcarrier reference signal is generated from the separated sync component and used to correct phase errors in the separated chrominance component or encode the separated colour components after they have been phase corrected in response to a subcarrier reference signal generated from bursts separated from the chrominance component. These methods of timing error correction ensure coherency of the signals horizontal sync and colour burst components (i.e. coherency of the luminance and chrominance components) and thus enable conventional line-to-line time base correction using a plurality of delay lines to be effected upon the resulting output signal. In Fig. 1 the composite colour television signal from a magnetic tape is separated into its luminance component (2À7 MHz high pass filter 9) and its chrominance component (767 KHz band pass filter 14-the chrominance component having been frequency-transposed before recording). The chrominance component is frequency-converted by balanced modulator 15 to its nominal frequency at 3À58 MHz in response to a 4À347 MHz input from balanced modulator 23 which receives the 767 KHz output of VCO 22 and 3À58 MHz output of subcarrier generator 10 (Fig. 2 not shown) controlled by the horizontal sync pulses separated 31 from the luminance component. VCO 22 is controlled by the output of phase detector 21 which receives the output of subcarrier generator 10 and the bursts separated 20 from the corrected chrominance component. Modulator 23 may be omitted if oscillator 22 has a nominal frequency of 4À347 MHz. The prior art system using a stable crystal reference oscillator 26 of 3À58 MHz may be modified to include the coherent subcarrier generator 10 by including switch 18. Two further embodiments are described with reference to Figs. 3 and 4 (not shown). In a fourth embodiment Fig. 5 band pass filter 83 of 3À58 MHz separates the chrominance component from the luminance component. This chrominance component is decoded into I and Q signals in response to a VCO 88 controlled by a phase detector 87 in response to the separated bursts 85, to thereby eliminate phase errors. These I and Q signals are then encoded 89 onto a sync coherent subcarrier from generator 10 in response to line sync pulses separated from the luminance component.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/484,184 US4326216A (en) | 1974-06-28 | 1974-06-28 | Synchronous color conversion system |
US05/484,185 US4590510A (en) | 1974-06-28 | 1974-06-28 | System for processing a composite color television signal obtained from a recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7507386L true SE7507386L (en) | 1975-12-29 |
SE400446B SE400446B (en) | 1978-03-20 |
Family
ID=27047904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7507386A SE400446B (en) | 1974-06-28 | 1975-06-27 | SYSTEM FOR PROCESSING A COMPOSITE FERTILE VISION SIGNAL |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5125022A (en) |
AT (1) | AT344261B (en) |
CH (1) | CH600716A5 (en) |
DE (1) | DE2528826C3 (en) |
FR (1) | FR2276750A1 (en) |
GB (1) | GB1519151A (en) |
IT (1) | IT1040678B (en) |
NL (1) | NL166595C (en) |
SE (1) | SE400446B (en) |
YU (1) | YU37426B (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52112228A (en) * | 1976-03-17 | 1977-09-20 | Sony Corp | Time axis correction unit |
JPS5923154B2 (en) * | 1976-10-08 | 1984-05-31 | ソニー株式会社 | Color video signal reproducing device |
JPS5742288A (en) * | 1980-08-28 | 1982-03-09 | Victor Co Of Japan Ltd | Rotating information recording medium reproduction device |
JPS57124985A (en) * | 1981-01-26 | 1982-08-04 | Victor Co Of Japan Ltd | Color video signal reproducing device |
US4370680A (en) * | 1981-02-25 | 1983-01-25 | Tokyo Shibaura Denki Kabushiki Kaisha | Color signal processing device for video recorder |
JP2502499B2 (en) * | 1985-02-04 | 1996-05-29 | 松下電器産業株式会社 | Video signal processing device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3820154A (en) * | 1972-08-25 | 1974-06-25 | Int Video Corp | Phased color under video recording and playback method and apparatus |
-
1975
- 1975-06-19 GB GB2613975A patent/GB1519151A/en not_active Expired
- 1975-06-19 NL NL7507322A patent/NL166595C/en not_active IP Right Cessation
- 1975-06-20 IT IT5016075A patent/IT1040678B/en active
- 1975-06-25 CH CH825675A patent/CH600716A5/xx not_active IP Right Cessation
- 1975-06-26 AT AT492475A patent/AT344261B/en not_active IP Right Cessation
- 1975-06-27 YU YU165875A patent/YU37426B/en unknown
- 1975-06-27 FR FR7520231A patent/FR2276750A1/en active Granted
- 1975-06-27 DE DE19752528826 patent/DE2528826C3/en not_active Expired
- 1975-06-27 SE SE7507386A patent/SE400446B/en not_active IP Right Cessation
- 1975-06-27 JP JP50079957A patent/JPS5125022A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
NL7507322A (en) | 1975-12-30 |
SE400446B (en) | 1978-03-20 |
DE2528826A1 (en) | 1976-01-08 |
DE2528826C3 (en) | 1979-01-11 |
CH600716A5 (en) | 1978-06-30 |
GB1519151A (en) | 1978-07-26 |
DE2528826B2 (en) | 1978-05-24 |
FR2276750B1 (en) | 1981-09-25 |
FR2276750A1 (en) | 1976-01-23 |
IT1040678B (en) | 1979-12-20 |
NL166595C (en) | 1981-08-17 |
YU37426B (en) | 1984-08-31 |
YU165875A (en) | 1983-04-27 |
ATA492475A (en) | 1977-11-15 |
JPS5125022A (en) | 1976-03-01 |
AT344261B (en) | 1978-07-10 |
NL166595B (en) | 1981-03-16 |
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