GB1307112A - Method and apparatus for electrical signals - Google Patents

Method and apparatus for electrical signals

Info

Publication number
GB1307112A
GB1307112A GB2265870A GB2265870A GB1307112A GB 1307112 A GB1307112 A GB 1307112A GB 2265870 A GB2265870 A GB 2265870A GB 2265870 A GB2265870 A GB 2265870A GB 1307112 A GB1307112 A GB 1307112A
Authority
GB
United Kingdom
Prior art keywords
signals
flesh
tones
signal
resultant
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.)
Expired
Application number
GB2265870A
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.)
Philips North America LLC
Original Assignee
Magnavox Co
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 Magnavox Co filed Critical Magnavox Co
Publication of GB1307112A publication Critical patent/GB1307112A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04N9/643—Hue control means, e.g. flesh tone control

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Television Systems (AREA)

Abstract

1307112 Colour television MAGNAVOX CO 11 May 1970 [12 May 1969 2 Oct 1969 1 May 1970] 22658/70 Heading H4F An arrangement for improving the display of flesh tones in a television receiver of the NTSC type comprises a phase detector responsive to chrominance signals within a given phase range (say IŒ30 degrees) and controlling the generation of a correction signal which when combined with the chrominance signal produces flesh-tone representation by signals nearer or equal to I. In one embodiment (Fig. 2, not shown) signals at I + 30 and I - 30 degrees are gated with the chrominance signal and control the generation of signals which when added thereto produce a resultant close to I for tones near flesh, and much smaller phase changes for tones between 30 and 52À5 degrees away from flesh, other tones being unaffected. In another embodiment (Fig. 6, not shown) the chrominance signal (preferably after limiting) is added to a reference I signal and if the resultant has a magnitude exceeding a threshold (greater than that of the reference signal) then the received chrominance signal is blocked and the resultant of the addition (which has a phase angle nearer to I) is substituted.
GB2265870A 1969-05-12 1970-05-11 Method and apparatus for electrical signals Expired GB1307112A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US82378169A 1969-05-12 1969-05-12
US86323669A 1969-10-02 1969-10-02
US3370870A 1970-05-01 1970-05-01

Publications (1)

Publication Number Publication Date
GB1307112A true GB1307112A (en) 1973-02-14

Family

ID=27364473

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2265870A Expired GB1307112A (en) 1969-05-12 1970-05-11 Method and apparatus for electrical signals

Country Status (6)

Country Link
JP (1) JPS501852B1 (en)
AU (1) AU1488070A (en)
DE (1) DE2023132A1 (en)
FR (1) FR2044781B1 (en)
GB (1) GB1307112A (en)
NL (1) NL7006827A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3663744A (en) * 1970-07-22 1972-05-16 Rca Corp Selective tint correction circuits
JPS5232684U (en) * 1975-08-28 1977-03-08
JPS5338650U (en) * 1976-09-09 1978-04-04
JPS53137732U (en) * 1977-04-07 1978-10-31
JPS6083213U (en) * 1983-11-16 1985-06-08 高橋電機株式会社 Internal silence solenoid

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3301945A (en) * 1964-07-01 1967-01-31 Admiral Corp Automatic color temperature control

Also Published As

Publication number Publication date
FR2044781A1 (en) 1971-02-26
AU1488070A (en) 1971-11-18
FR2044781B1 (en) 1973-12-07
NL7006827A (en) 1970-11-16
JPS501852B1 (en) 1975-01-22
DE2023132A1 (en) 1970-11-19

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees