KR960035442A - Video head contamination detection method - Google Patents

Video head contamination detection method Download PDF

Info

Publication number
KR960035442A
KR960035442A KR1019950006843A KR19950006843A KR960035442A KR 960035442 A KR960035442 A KR 960035442A KR 1019950006843 A KR1019950006843 A KR 1019950006843A KR 19950006843 A KR19950006843 A KR 19950006843A KR 960035442 A KR960035442 A KR 960035442A
Authority
KR
South Korea
Prior art keywords
recording
video
video head
threshold value
video signal
Prior art date
Application number
KR1019950006843A
Other languages
Korean (ko)
Other versions
KR0141864B1 (en
Inventor
이창호
Original Assignee
배순훈
대우전자 주식회사
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 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950006843A priority Critical patent/KR0141864B1/en
Publication of KR960035442A publication Critical patent/KR960035442A/en
Application granted granted Critical
Publication of KR0141864B1 publication Critical patent/KR0141864B1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier
    • G11B15/66—Threading; Loading; Automatic self-loading
    • G11B15/665—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container
    • G11B15/6653—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container to pull the record carrier against drum
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1446—Reducing contamination, e.g. by dust, debris

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Television Signal Processing For Recording (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 비디오 헤드 오염 검출 방법에 관한 것으로서, 이를 위하여, 비디오 카세트 레코더에서 대칭형으로 드럼에 장착된 제1 또는 제2비디오 헤드가 이물질에 오염이 되어 있는지를 검출하는 방법으로서, 사용자의 키조작에 의거하여 녹화 모드로 전환되는지를 판단하는 제1과정; 녹화 모드 전환시 입력되는 영상 신호의 소정량을 녹화하고 다시 재생하는 제2과정; 재생시 출력되는 영상 신호가 기설정된 소정의 정상적인 재생 영상 신호 판단의 기준인 임계값 이상이 되는지를 비교하는 제3과정; 임계값 이상이면 계속 녹화 동작을 수행하고, 임계값 이하이면 녹화 동작을 정지시키고 사용자에게 비디오 헤드가 오염되었음을 인지시키기 위하여 경고음을 발생하거나 디스플레이하는 제4과정을 포함하는 비디오 헤드 오염 검출 방법을 제공함으로서, 비디오 헤드의 오염 및 이상 여부를 녹화전에 감지하여 중요한 프로그램의 녹화를 놓치는 것을 방지하기 위한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video head contamination detection method. To this end, a method of detecting whether a first or second video head mounted on a drum in a symmetrical manner in a video cassette recorder is contaminated with foreign matters. Determining whether to switch to a recording mode based on the first step; A second step of recording and reproducing a predetermined amount of a video signal input when switching the recording mode; A third step of comparing whether or not the video signal outputted during playback is equal to or greater than a threshold value, which is a criterion for determining a predetermined normal playback video signal; By providing a video head contamination detection method comprising the fourth step of continuing to perform a recording operation if the threshold value or more, and below the threshold value to stop the recording operation and to generate or display a warning sound to inform the user that the video head is dirty. In addition, the video head is designed to detect the contamination and abnormality of the video head before recording to prevent the recording of important programs.

Description

비디오 헤드 오염 검출 방법Video head contamination detection method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명의 바람직한 실시예에 따른 비디오 헤드 오염 검출 방법을 도시한 흐름도.2 is a flowchart illustrating a video head contamination detection method according to a preferred embodiment of the present invention.

Claims (3)

비디오 카세트 레코더에서 대칭형으로 드럼에 장착된 제1 또는 제2비디오 헤드가 이물질에 오염이 되어 있는지를 검출하는 방법으로서, 사용자의 키조작에 의거하여 녹화 모드로 전환되는지를 판단하는 제1과정; 녹화 모드 전환시 입력되는 영상 신호의 소정량을 녹화하고 다시 재생하는 제2과정; 재생시 출력되는 영상 신호가 기설정된 소정의 정상적인 재생 영상 신호 판단의 기준이 되는 임계값 이상이 되는지를 비교하는 제3과정; 임계값 이상이면 계속 녹화 동작을 수행하고, 임계값 이하이면 녹화 동작을 정지시키고 사용자에게 비디오 헤드가 오염되었음을 인지시키기 위하여 경고음을 발생하거나 디스플레이하는 제4과정을 포함하는 비디오 헤드 오염 검출 방법.A method of detecting whether a first cassette or a second video head mounted on a drum symmetrically in a video cassette recorder is contaminated with foreign matter, the method comprising: a first step of determining whether to switch to a recording mode based on a user's key operation; A second step of recording and reproducing a predetermined amount of a video signal input when switching the recording mode; A third step of comparing whether the video signal output at the time of reproduction becomes equal to or more than a threshold value, which is a reference for determining a predetermined normal reproduction video signal; And performing a recording operation if the threshold value is greater than or equal to the threshold value, and generating or displaying a warning sound to stop the recording operation and inform the user that the video head is contaminated. 제1항에 있어서, 상기 제2과정은 상기 제1비디오 헤드로 기록 및 재생하는 과정과 상기 제2비디오 헤드로 기록 및 재생하는 과정을 포함하는 것을 특징으로 하는 비디오 헤드 오염 검출 방법.The method of claim 1, wherein the second process includes recording and playing back the first video head and recording and playing back the second video head. 제2항에 있어서, 상기 제2과정은 비디오 테이프의 주행을 정지시킨 상태에서 기록 및 재생하는 것을 특징으로 하는 비디오 헤드 오염 검출 방법.3. The video head contamination detection method according to claim 2, wherein said second process records and plays back while the video tape is stopped running. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950006843A 1995-03-29 1995-03-29 Method of detecting pollution of video head KR0141864B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950006843A KR0141864B1 (en) 1995-03-29 1995-03-29 Method of detecting pollution of video head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950006843A KR0141864B1 (en) 1995-03-29 1995-03-29 Method of detecting pollution of video head

Publications (2)

Publication Number Publication Date
KR960035442A true KR960035442A (en) 1996-10-24
KR0141864B1 KR0141864B1 (en) 1998-07-15

Family

ID=19410786

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950006843A KR0141864B1 (en) 1995-03-29 1995-03-29 Method of detecting pollution of video head

Country Status (1)

Country Link
KR (1) KR0141864B1 (en)

Also Published As

Publication number Publication date
KR0141864B1 (en) 1998-07-15

Similar Documents

Publication Publication Date Title
KR870003491A (en) Synchronous recording circuit
KR960035442A (en) Video head contamination detection method
KR970050482A (en) How to record a video cassette recorder
KR0141867B1 (en) Method of skipping advertisement in a video cassette recorder
KR950034150A (en) How to control recording on a video cassette recorder
KR970071570A (en) How to perform on-time function of composite video recording and playback device
KR970005022B1 (en) Control method of complex video recorder
KR970050953A (en) How to Record Video CD / V Composite System
KR970029681A (en) How to record on a video cassette recorder
KR920017096A (en) Program filing method of VTR
KR960011938A (en) Adult video tape playback control device and method of video cassette recorder
KR970008093A (en) How to record a video cassette recorder
KR970029595A (en) How to play a video cassette recorder
KR970029680A (en) How to record on a video cassette recorder
KR970008034A (en) How to display the blackout time in the video cassette recorder
KR940004569A (en) How to Play Still Images During Search Operation
KR970050486A (en) How to play a damaged tape in a VTR
KR960002224A (en) How to determine the mode of Multimode VRC
KR920020449A (en) How to record tape silently on a logic recording / playback deck
JPS60119619A (en) Blocking detector of reproducing head in magnetic recorder and reproducing device
KR960035605A (en) Audio Dubbing Method in Composite Video Cassette Recorder
KR970029484A (en) Apparatus and method for reservation recording control of video cassette recorder
KR950025673A (en) Multi-deck V-Ral tape recording control device and its recording control method
KR940004573A (en) High-speed driving control method of magnetic tape recording and reproducing apparatus
KR970050226A (en) Indicator of when to use the head cleaning tape of the video cassette recorder

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
LAPS Lapse due to unpaid annual fee