ES432720A1 - Video amplifier circuit for use with synchronous detectors - Google Patents

Video amplifier circuit for use with synchronous detectors

Info

Publication number
ES432720A1
ES432720A1 ES432720A ES432720A ES432720A1 ES 432720 A1 ES432720 A1 ES 432720A1 ES 432720 A ES432720 A ES 432720A ES 432720 A ES432720 A ES 432720A ES 432720 A1 ES432720 A1 ES 432720A1
Authority
ES
Spain
Prior art keywords
going
detection
noise
envelope
video
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
ES432720A
Other languages
Spanish (es)
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of ES432720A1 publication Critical patent/ES432720A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455—Demodulation-circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Amplifiers (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

Synchronous video detection in a television receiver provides increased detection linearity and better signal-to-noise ratio for weak signals than does envelope video detection. Impulse noise, which produces generally unobtrusive black-going noise components in a picture reproduced in response to a video signal recovered by envelope detection from a negatively modulated carrier also produces obtrusive white-going noise components in a picture reproduced in a response to a video signal recovered by synchronous detection. Common signal processing means, responsive to the envelope of the video signal modulated intermediate frequency carrier, inverts the white-going noise impulses to produce black-going components so that substantially all noise impulses appear black-going in the recovered signal.
ES432720A 1973-12-28 1974-12-09 Video amplifier circuit for use with synchronous detectors Expired ES432720A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US429673A US3862361A (en) 1973-12-28 1973-12-28 Video amplifier circuit for use with synchronous detectors

Publications (1)

Publication Number Publication Date
ES432720A1 true ES432720A1 (en) 1977-02-16

Family

ID=23704255

Family Applications (1)

Application Number Title Priority Date Filing Date
ES432720A Expired ES432720A1 (en) 1973-12-28 1974-12-09 Video amplifier circuit for use with synchronous detectors

Country Status (15)

Country Link
US (1) US3862361A (en)
JP (1) JPS5436009B2 (en)
AT (1) AT368339B (en)
BE (1) BE823781A (en)
BR (1) BR7410731D0 (en)
CA (1) CA1035429A (en)
DE (1) DE2460264B2 (en)
DK (1) DK147029C (en)
ES (1) ES432720A1 (en)
FI (1) FI61982C (en)
FR (1) FR2256602B1 (en)
GB (1) GB1487586A (en)
IT (1) IT1025805B (en)
NL (1) NL7416932A (en)
SE (1) SE399797B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6041493B2 (en) * 1977-03-16 1985-09-17 ソニー株式会社 Receiving machine
US4253118A (en) * 1979-07-02 1981-02-24 Zenith Radio Corporation Synchronous detection system
US4329712A (en) * 1980-06-24 1982-05-11 Rca Corporation Adaptive distortion elimination circuitry for a video disc player
US4562475A (en) * 1984-03-15 1985-12-31 Rca Corporation DC Restoration of synchronously detected CCD imager output signals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3812921A (en) * 1972-07-24 1974-05-28 Zenith Radio Corp Video signal processing system and method with above-white-level noise inversion
US3812289A (en) * 1972-11-06 1974-05-21 Rca Corp Television receiver using synchronous video detection

Also Published As

Publication number Publication date
BR7410731D0 (en) 1975-09-02
FR2256602B1 (en) 1978-07-13
DK147029B (en) 1984-03-19
GB1487586A (en) 1977-10-05
DK669674A (en) 1975-08-18
AU7669674A (en) 1976-06-24
US3862361A (en) 1975-01-21
SE7415895L (en) 1975-06-30
CA1035429A (en) 1978-07-25
DK147029C (en) 1984-08-27
BE823781A (en) 1975-04-16
FI61982B (en) 1982-06-30
JPS5436009B2 (en) 1979-11-07
NL7416932A (en) 1975-07-01
SE399797B (en) 1978-02-27
AT368339B (en) 1982-10-11
IT1025805B (en) 1978-08-30
JPS50118618A (en) 1975-09-17
FI61982C (en) 1982-10-11
FI371274A (en) 1975-06-29
DE2460264A1 (en) 1975-07-10
DE2460264B2 (en) 1976-09-09
FR2256602A1 (en) 1975-07-25
ATA1025274A (en) 1982-01-15

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19851014