FR2260243A1 - Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock - Google Patents

Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock

Info

Publication number
FR2260243A1
FR2260243A1 FR7403378A FR7403378A FR2260243A1 FR 2260243 A1 FR2260243 A1 FR 2260243A1 FR 7403378 A FR7403378 A FR 7403378A FR 7403378 A FR7403378 A FR 7403378A FR 2260243 A1 FR2260243 A1 FR 2260243A1
Authority
FR
France
Prior art keywords
low
pass filter
video signal
haze
removal
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.)
Withdrawn
Application number
FR7403378A
Other languages
French (fr)
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London 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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Priority to FR7403378A priority Critical patent/FR2260243A1/en
Publication of FR2260243A1 publication Critical patent/FR2260243A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

A television system is provided with circuitry which improves the quality of the video signals obtained under viewing conditions which usually have resulted in poor quality pictures being obtained. The circuitry removes any very low frequency component which is superimposed on the video signal without significantly reducing the useful information content of the video signals. The undesirable low frequency component arises particularly when a hazy scene is viewed or when the camera is subjected to shock or vibration. The LF modulation signals are extracted by a low-pass filter and inverted before recombination. The system is particularly suitable for use before transmission so that only useful information is amplified and transmitted.
FR7403378A 1974-02-01 1974-02-01 Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock Withdrawn FR2260243A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7403378A FR2260243A1 (en) 1974-02-01 1974-02-01 Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7403378A FR2260243A1 (en) 1974-02-01 1974-02-01 Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock

Publications (1)

Publication Number Publication Date
FR2260243A1 true FR2260243A1 (en) 1975-08-29

Family

ID=9134347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7403378A Withdrawn FR2260243A1 (en) 1974-02-01 1974-02-01 Removal of VLF components from video signal - by adding inverted output of low-pass filter to cancel effects of haze and camera shock

Country Status (1)

Country Link
FR (1) FR2260243A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse