JPH0346886A - Muse/ntsc converter and chrominance subcarrier signal generating method - Google Patents

Muse/ntsc converter and chrominance subcarrier signal generating method

Info

Publication number
JPH0346886A
JPH0346886A JP18339789A JP18339789A JPH0346886A JP H0346886 A JPH0346886 A JP H0346886A JP 18339789 A JP18339789 A JP 18339789A JP 18339789 A JP18339789 A JP 18339789A JP H0346886 A JPH0346886 A JP H0346886A
Authority
JP
Japan
Prior art keywords
chrominance subcarrier
frequency
frequency dividing
oscillation circuit
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
Application number
JP18339789A
Other languages
Japanese (ja)
Other versions
JP2594153B2 (en
Inventor
Hideji Yanase
Yosuke Mizutani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP1183397A priority Critical patent/JP2594153B2/en
Publication of JPH0346886A publication Critical patent/JPH0346886A/en
Application granted granted Critical
Publication of JP2594153B2 publication Critical patent/JP2594153B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To control an oscillation circuit for a chrominance subcarrier stably by providing a PLL means with a 1st frequency dividing means which divides the frequency of the signal of a horizontal synchronizing component by (m), a 2nd frequency dividing means which divides the frequency of the output of the oscillation circuit by (n), and a phase comparing means which compares the phases of the outputs of the 1st and 2nd frequency dividing means with each other.
CONSTITUTION: The phase of the chrominance subcarrier is brought under PLL control with the horizontal synchronizing signal component so that doe disturbance becomes inconspicuous in a field period (263H period). The PLL oscillation circuit 10 for chrominance subcarrier signal operation sets the (m) and (n) of the frequency dividing circuits 14 and 22 so as to correspond to a video signal of 60Hz which is cut of the standards. The oscillator 10 operates without any trouble because of the setting even if the video signal of (60Hz field frequency) which is out of the standards is inputted. Those (m) and (n) are so set that 227.227≤n/m≤227.318 and 0.509≤263×n/m-{263×n/m}≤0.764.
COPYRIGHT: (C)1991,JPO&Japio
JP1183397A 1989-07-14 1989-07-14 MUSE / NTSC converter Expired - Lifetime JP2594153B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1183397A JP2594153B2 (en) 1989-07-14 1989-07-14 MUSE / NTSC converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1183397A JP2594153B2 (en) 1989-07-14 1989-07-14 MUSE / NTSC converter

Publications (2)

Publication Number Publication Date
JPH0346886A true JPH0346886A (en) 1991-02-28
JP2594153B2 JP2594153B2 (en) 1997-03-26

Family

ID=16135065

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1183397A Expired - Lifetime JP2594153B2 (en) 1989-07-14 1989-07-14 MUSE / NTSC converter

Country Status (1)

Country Link
JP (1) JP2594153B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103308A (en) * 1989-10-17 1992-04-07 Sanyo Electric Co., Ltd. Television signal convertor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01289394A (en) * 1988-05-17 1989-11-21 Nippon Hoso Kyokai <Nhk> High vision signal off-line processor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01289394A (en) * 1988-05-17 1989-11-21 Nippon Hoso Kyokai <Nhk> High vision signal off-line processor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5103308A (en) * 1989-10-17 1992-04-07 Sanyo Electric Co., Ltd. Television signal convertor

Also Published As

Publication number Publication date
JP2594153B2 (en) 1997-03-26

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