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JPS5668974A - Program search system of vtr of the like - Google Patents

Program search system of vtr of the like

Info

Publication number
JPS5668974A
JPS5668974A JP14505779A JP14505779A JPS5668974A JP S5668974 A JPS5668974 A JP S5668974A JP 14505779 A JP14505779 A JP 14505779A JP 14505779 A JP14505779 A JP 14505779A JP S5668974 A JPS5668974 A JP S5668974A
Authority
JP
Japan
Prior art keywords
data
pulse
writing
reading
supplied
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
JP14505779A
Other languages
Japanese (ja)
Other versions
JPS6226104B2 (en
Inventor
Hideo Matsuoka
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.)
Akai Electric Co Ltd
Original Assignee
Akai 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 Akai Electric Co Ltd filed Critical Akai Electric Co Ltd
Priority to JP14505779A priority Critical patent/JPS5668974A/en
Publication of JPS5668974A publication Critical patent/JPS5668974A/en
Publication of JPS6226104B2 publication Critical patent/JPS6226104B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

PURPOSE: To realize an accurate reading of the data writing position, by writing the data in synchronization with the control pulse and corresponding to height of the pulse width to 0 or 1 of the data and then reading the data by specifying the position of a fixed ratio of the pulse width.
CONSTITUTION: The writing is carried out with a synchronization secured between the data of the head leading of program and the control pulse and also corresponding to height of the pulse width to 0 or 1 of the data. The signals containing the positive and negative pulses and produced by differentiating the writing data are supplied 1 to the program search device; and the outputs of the NOR circuits 6 and 9 which the positive and negative pulses are supplied along with the signal of 0 during the FF and RWD are supplied to the PLL17 via the OR circuit 13. Thus the position of an accurate fixed ratio of the reading pulse interval is specified in correspondence to the written pulse interval even in case the tape travelling speed has a considerable change at the PLL17 and during the reproduction. Then the timing is selected 19 to decide the strobe pulse duration.
COPYRIGHT: (C)1981,JPO&Japio
JP14505779A 1979-11-08 1979-11-08 Program search system of vtr of the like Granted JPS5668974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14505779A JPS5668974A (en) 1979-11-08 1979-11-08 Program search system of vtr of the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14505779A JPS5668974A (en) 1979-11-08 1979-11-08 Program search system of vtr of the like

Publications (2)

Publication Number Publication Date
JPS5668974A true JPS5668974A (en) 1981-06-09
JPS6226104B2 JPS6226104B2 (en) 1987-06-06

Family

ID=15376375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14505779A Granted JPS5668974A (en) 1979-11-08 1979-11-08 Program search system of vtr of the like

Country Status (1)

Country Link
JP (1) JPS5668974A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224485A (en) * 1982-06-23 1983-12-26 Toshiba Corp Device for recording and reproducing information of video tape recorder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224485A (en) * 1982-06-23 1983-12-26 Toshiba Corp Device for recording and reproducing information of video tape recorder
JPH0435837B2 (en) * 1982-06-23 1992-06-12 Tokyo Shibaura Electric Co

Also Published As

Publication number Publication date
JPS6226104B2 (en) 1987-06-06

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