JPS6173489A - Device for converting synchronization of television signal - Google Patents

Device for converting synchronization of television signal

Info

Publication number
JPS6173489A
JPS6173489A JP59196428A JP19642884A JPS6173489A JP S6173489 A JPS6173489 A JP S6173489A JP 59196428 A JP59196428 A JP 59196428A JP 19642884 A JP19642884 A JP 19642884A JP S6173489 A JPS6173489 A JP S6173489A
Authority
JP
Japan
Prior art keywords
signal
frame
frame signal
pal
ntsc
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.)
Pending
Application number
JP59196428A
Other languages
Japanese (ja)
Inventor
Masao Kasuga
正男 春日
Mitsuru Kikuchi
菊池　充
Yasuhiko Fujii
泰彦 藤井
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP59196428A priority Critical patent/JPS6173489A/en
Priority to DE1985306688 priority patent/DE176324T1/en
Priority to EP19850306688 priority patent/EP0176324B1/en
Priority to DE8585306688T priority patent/DE3577381D1/en
Publication of JPS6173489A publication Critical patent/JPS6173489A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G11B27/323—Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/028—Electronic editing of analogue information signals, e.g. audio or video signals with computer assistance
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
    • G11B2220/913—Digital audio tape [DAT] format
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/002—Programmed access in sequence to a plurality of record carriers or indexed parts, e.g. tracks, thereof, e.g. for editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/024—Electronic editing of analogue information signals, e.g. audio or video signals on tapes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Synchronizing For Television (AREA)
  • Television Signal Processing For Recording (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To obtain a frame signal synchronized with a different television reference system by forming a switching signal generator using a frame period corresponding to the least common multiple between the period of the 1st frame signal and that of the 2nd frame signal as a synchronizing period. CONSTITUTION:A television signal is supplied from the output terminal 2 of a VTR 1 to a PAL frame signal generator 3 and a PAL frame signal synchronized with said TV signal is outputted from a PAL frame signal generator 3 and inputted to a switch circuit 4 to be opened/closed by a control signal obtained on the basis of a signal from the VTR 1. The 0th, 5th, 15th, and 20th signals out of the PAL type frame signals are passed to control an NTSC frame signal generator 8 and output an NTSC type frame signal synchronized with in each 6th signal. Thus, the NTSC type frame signal synchronized with the PAL type frame signal is obtained from an output terminal 9.

Description

【発明の詳細な説明】 産業上の利用分野 テレビジョンの標準方式の異なるＰＡＬ方式およびＮＴ
ＳＣ方式の両システムのＶＴＲを同期させて記録または
再生させる為のテレビジョン信号同期変換装置に関する
。[Detailed Description of the Invention] Industrial Application Fields PAL and NT different standards of television
The present invention relates to a television signal synchronization conversion device for synchronizing recording or reproduction of VTRs of both SC systems.

（従来技術） テレビジョンの標準方式としてＮＴＳＣ方式とＰＡＬ方
式とがあるが、Ｎ丁Ｓ０１方式で録再可能なＶＴＲとＰ
ＡＬ方式で録再可能なＶＴＲとを同期させて記録または
再生させたい場合がある。(Prior art) Standard television systems include the NTSC system and the PAL system.
There are cases where it is desired to synchronize recording or reproduction with a VTR capable of recording and reproducing in the AL system.

例えば、ＶＴＲを利用してビデオテープに音楽信号をデ
ジタル方式で記録するデジタルオーディオシステムは既
存のＶＴＲをそのまま利用してデジタル化された信号を
擬似映像信号として磁気テープ上へ記ａする為に、その
記録または再生法は使用されるＶＴＲのテレビジョン標
準方式により大きく左右される１Ｘになる。For example, a digital audio system that uses a VTR to digitally record music signals on a videotape uses an existing VTR as is to record the digitized signal on a magnetic tape as a pseudo video signal. The recording or playback method is 1X, which largely depends on the television standard of the VTR used.

今、ＮＴＳＣ方式のＶＴＲで記録されたデジタルオーデ
ィオの磁気テープとＰＡＬ方式のＶＴＲで記録された映
像の磁気テープとをそれぞれの方式のＶＴＲで同期をと
りながら再生する場合を例にとり説明する。An example will be explained in which a digital audio magnetic tape recorded on an NTSC VTR and a video magnetic tape recorded on a PAL VTR are played back while being synchronized with each VTR.

これは例えば、映像信号とデジタルオーディオ信号が一
枚のディスクに記録されるディスク用のマスク信号の収
ａＩ３よび編集などに利用される場合である。This is the case, for example, when it is used for collection and editing of a mask signal for a disc in which a video signal and a digital audio signal are recorded on one disc.

従来、このような標準方式の異なるＶＴＲの同期をとる
には、一方の方式をもう一方の方式に完全に変換し、方
式を同一にして、同期をとっていた。Conventionally, in order to synchronize VTRs that use different standard systems, one method has been completely converted to the other, making the systems the same, and synchronization has been achieved.

ＰＡＬ方式のテレビジョンの走査線数は６２５本／２フ
ィールド（１フレーム）、そのフィールド数は５０枚、
７秒であり、ＮＴＳＣ方式のテレビジョンの走査線数は
５２５本／２フィールド（１フレーム）、そのフィール
ド数は６０枚／秒である。The number of scanning lines of PAL television is 625 lines/2 fields (1 frame), and the number of fields is 50.
The number of scanning lines of NTSC television is 525 lines/2 fields (1 frame), and the number of fields is 60 frames/second.

従って、ＰＡＬ方式からＮＴＳＣ方式に変換するには走
査線をフィールド当り５０本ずつ間引き、フィールド数
を毎秒１０枚増やす必要がある。Therefore, in order to convert from the PAL system to the NTSC system, it is necessary to thin out the scanning lines by 50 per field and increase the number of fields by 10 per second.

走査線の間引きは約６本に１本の割合で１フィールド当
り５０木間引き、１走査線長を下とすれば、遅延線の切
換えにより１フィールド当り５０Ｔの隙間のある５２５
／　５０のライン変換をした信号が得られる。この５０
Ｔの隙間を遅延線により５フイ一ルド分まとめ、第２図
に示す原理図のようにこの隙間にフィールドを繰返し使
用し、５０フィールド当り、１０フイールドを繰返し使
用してフィールド変換をし、５２５．’６０の信号、す
なわちＮＴＳＣ方式の信号が１ｑられる。Scanning lines are thinned out at a rate of about 1 in 6, 50 trees per field, and if the length of 1 scanning line is reduced, there is a gap of 50T per field due to delay line switching.
/50 line converted signal is obtained. This 50
The gap of T is grouped into 5 fields by a delay line, fields are repeatedly used in this gap as shown in the principle diagram shown in Fig. 2, and field conversion is performed by repeatedly using 10 fields per 50 fields. ．． '60 signal, that is, NTSC signal is 1q.

逆に、ＮＴＳＣ方式よりＰＡＬ方式に変換するには走査
線をフィールド当り５０本増加させ、フィールド数を毎
秒１０枚減少させる必要がある。その時のフィールド変
換の原理図を第３図に示した。Conversely, to convert from the NTSC system to the PAL system, it is necessary to increase the number of scanning lines by 50 per field and decrease the number of fields by 10 per second. A diagram of the principle of field conversion at that time is shown in Fig. 3.

（発明が解決しようとする問題点） 上記の如く、ＰＡＬ方式およびＮＴＳＣ方式のＶＴＲの
同期をとるのに、一方のテレビジョンの標準方式を他方
に変換し、方式を合わせて同期をとっていｔ：が、この
標準方式変換装置は回路も複雑かつ非常に高価であった
。(Problems to be Solved by the Invention) As mentioned above, in order to synchronize PAL and NTSC VTRs, it is necessary to convert the standard television system of one to the other and synchronize the systems. However, this standard system converter had a complicated circuit and was very expensive.

（問題点を解決づ−るための手段） 本発明は上記問題点に対して筒中な構成で安価でかつフ
レーム信号同期変換装置を提供するものでテレビジョン
の標準方式である第１方式のＶＴＲの出力信号により第
１方式のフレーム信号を発生する第１フレーム信号発生
器と、ＶＴＲの出力１言号によりスイッチング信号を発
生するスイッチング信号発生器と、前記スイッチング信
号により前記第１方式のフレーム信号をスイッチングす
るスイッチ回路と、前記スイッチ回路の出力する特定フ
レーム信号と同期がとれたテレビジョンの標準方式であ
る第２方式のフレーム信号を発生する第２フレーム信号
発生器とを備え、前記第１方式のフレーム信号の周期と
、前記第２方式のフレーム信号の周期との最小公倍数の
フレーム周期を同期角ＪｌｌＪとし、スイッチング信号
発生器は前記スイッチ回路に入力する第１方式のフレー
ム信号の内前記同期周期に対応したフレーム信号を通過
するようにし、前記通過フレーム（３号により前記第２
フレームｆＢ号発生器に同期をかけて第２方式のフレー
ム信号を得るようにした。(Means for Solving the Problems) The present invention solves the above problems by providing an inexpensive frame signal synchronization conversion device with a complete structure, and which is a first method VTR which is the standard method for television. a first frame signal generator that generates a frame signal of a first method based on an output signal of the VTR; a switching signal generator that generates a switching signal based on one output word of a VTR; and a second frame signal generator that generates a frame signal of a second system, which is a standard television system, synchronized with the specific frame signal outputted by the switch circuit, The frame period that is the least common multiple of the period of the frame signal of the first method and the period of the frame signal of the second method is set as the synchronization angle JllJ, and the switching signal generator is configured to select the frame signal of the first method among the frame signals of the first method input to the switch circuit. A frame signal corresponding to the synchronization period is passed through, and the passing frame (by No. 3, the second
The frame fB signal generator is synchronized to obtain a frame signal of the second system.

（実　施　例） ＶＴＲ１は編集に便利なようにアドレス用のタイムコー
ドが映像情報と共に磁気テープ上に記録出来るようにな
っている。ＮＴＳＣ方式ではＳ　Ｍ　Ｐ　Ｔ　Ｅタイム
コード、Ｆ）ＡＬ方式ではＥＢＵタイムコードが多く採
用されており、この両方式のタイムコードは時２分１秒
までは一致しているがフレームアドレスはＰＡＬ方式で
０〜２４番、ＮＴＳＣ方式で０〜２９番と異なっている
。従って、この両方式のフレームアドレスは０番から両
方式がスタートすれば、ＰＡＬ方式の５番とＮＴＳＣ方
式の６番、同Ｌ；　＜　１０ト１２番、１５．！＝１８
番、２ｏト２４番のそれぞれのフレームアドレスで両方
式のフレームが一致する。(Embodiment) For convenience in editing, the VTR 1 is designed so that an address time code can be recorded on a magnetic tape together with video information. The NTSC system often uses the SMPTE time code, and the F)AL system often uses the EBU time code.The time codes of both systems match up to 2 minutes and 1 second, but the frame address is the PAL system. 0 to 24 in the NTSC system, and 0 to 29 in the NTSC system. Therefore, if the frame addresses for both systems start from number 0, then number 5 for the PAL system, number 6 for the NTSC system, and the same L; < 10, 12, 15. ! =18
The frames of both types match at the respective frame addresses of No. 2, No. 20, and No. 24.

すなわち、ＰＡＬ方式のフレーム信号の周期とＮＴＳＣ
方式のフレーム信号の周１１１］との最小公倍数である
ＰＡＬ方式の５番目ごとのフレーム信号と、Ｎ　Ｔ　Ｓ
　Ｃ方式の６番目毎のフレーム信号がそれぞれ一致する
。In other words, the period of the PAL frame signal and the NTSC
every fifth frame signal of the PAL system, which is the least common multiple of the period 111 of the frame signal of the PAL system, and N T S
Every sixth frame signal of the C method matches each other.

本発明はこの両方式のフレームの一致点に着目して両方
式に共通の同期信号を１ｑようとするものである。The present invention focuses on the points of coincidence between the frames of both systems and attempts to provide 1q of synchronization signals common to both systems.

第１図は本発明のテレビジョン信号同期変換装置のＰＡ
Ｌ方式からＮＴＳＣ方式に変換する場合の一実施例のブ
ロック系統図である。FIG. 1 shows the PA of the television signal synchronous conversion device of the present invention.
FIG. 2 is a block system diagram of an embodiment in the case of converting from the L system to the NTSC system.

第４図は第１図実施例における説明用波形図をそれぞれ
示す。FIG. 4 shows explanatory waveform diagrams in the embodiment of FIG. 1, respectively.

第５図は第１図実施例における各部の波形のタイミング
チャートである。FIG. 5 is a timing chart of waveforms of various parts in the embodiment of FIG.

第１図において、１はＰＡＬ方式のＶＴＲであり、記録
または再生中の状態にあるものとする。In FIG. 1, numeral 1 indicates a PAL system VTR, which is in a recording or reproducing state.

ＶＴＲ１の出力端子２よりの第４図（１）に示すアレビ
ジョン信号がＦつＡＬフレーム信号発生器３に供給され
、その信号に同期した第４図（２）の如き波形のＰＡＬ
のフレーム信号がＰＡＬフレーム信号発生器３より出力
し、ＰＡＬ方式のＶＴＲ１からの信号より得る制御信号
で開閉するスイッチ回路４に入力している。実際には第
５図（Ｂ）にｂで示したような連続した波形が１りられ
る。The array vision signal shown in FIG. 4 (1) from the output terminal 2 of the VTR 1 is supplied to the F AL frame signal generator 3, which generates a PAL signal with a waveform as shown in FIG. 4 (2) synchronized with the signal.
A frame signal is output from a PAL frame signal generator 3 and input to a switch circuit 4 which is opened and closed by a control signal obtained from a signal from a PAL VTR 1. Actually, there is one continuous waveform as shown by b in FIG. 5(B).

ＶＴＲ１の出力端子５にはＥＢＵタイムコードが出力さ
れており、その信号はタイムコードリーグ６に供給され
、ＥＢＵフレームアドレスの４．９゜１４、２４番の信
号を検知してつくられるそれぞれのパルスによりスイッ
チ回路４の開閉を制御して、スイッチ回路４に入力した
ＰＡＬ方式のフレーム信号内の０．５．１５．２０番の
信号が通過するようにしている。通過した０、　５．１
５．２０番のＰＡＬ方式のフレーム信号はＮＴＳＣ発振
器７より駆動されているＮＴＳＣフレーム信号発生器８
を制御し、ＮＴＳＣフレーム信号発生器８は６番目毎に
同期がとられたＮＴＳＣ方式のフレーム信号を出力する
ようにしている。The EBU time code is output to the output terminal 5 of the VTR 1, and the signal is supplied to the time code league 6, which detects the signals at 4.9° 14 and 24 of the EBU frame address and generates each pulse. The opening/closing of the switch circuit 4 is controlled so that the signals of numbers 0.5, 15, and 20 in the PAL frame signal input to the switch circuit 4 are passed. Passed 0, 5.1
5. The PAL frame signal No. 20 is generated by the NTSC frame signal generator 8 which is driven by the NTSC oscillator 7.
The NTSC frame signal generator 8 outputs a synchronized NTSC frame signal every sixth frame.

従って、出力端子９にはＰＡＬ方式のフレーム信号と同
期のとれた第５図（Ｄ）にｄで示したＮＴＳＣ方式のフ
レーム信号が得られる。Therefore, an NTSC frame signal shown as d in FIG. 5(D) is obtained at the output terminal 9, which is synchronized with the PAL frame signal.

なお、１０は同期遅延回路であり、それに入力するＰＡ
Ｌ方式のフレーム信号をＮＴＳＣ発振器７よりの信号に
より遅延させて補正を行なう。出力端子１１の出力信号
はＰＡＬ方式の他のＶＴＲを同期運転する場合等に使用
されるものである。In addition, 10 is a synchronous delay circuit, and the PA input to it
Correction is performed by delaying the L-system frame signal with a signal from the NTSC oscillator 7. The output signal from the output terminal 11 is used when other PAL type VTRs are operated synchronously.

なお、上記実施例ではスイッチ回路４の制御をタイムコ
ードリーダ６の出力で行なったが、ＰＡＬフレーム信号
発生器３の出力信号を使用して制御しても良い。但し、
フレーム信号にはアドレスコードは含まないのでＰＡＬ
方式のフレーム信号が５番目毎にスイッチ回路４を通過
するようにすればよい。この方法であればタイムコード
のないＶＴＲであってもフレーム信号の同期変換が可能
となる。In the above embodiment, the switch circuit 4 is controlled by the output of the time code reader 6, but it may also be controlled by using the output signal of the PAL frame signal generator 3. however,
Since the frame signal does not include an address code, it is PAL.
It is sufficient if the frame signal of the system passes through the switch circuit 4 every fifth time. With this method, synchronous conversion of frame signals is possible even in a VTR without a time code.

また、逆にＮＴＳＣ方式からＰＡＬ方式変換をする場合
は同様の方法で変換することが可能である。Conversely, when converting from the NTSC system to the PAL system, it is possible to perform the conversion using a similar method.

（発明による効果） 上記の如く本発明によれば、ＰＡＬ方式とＮＴＳＣ方式
の共通フレームで同期をとっているために、両方式の信
号は独立しており、フィールドの偶奇が異なったり、反
転したりする問題は生じ得ないし、走査線の変換および
フレームの変換など？！雑な回路も必要とけず、極めて
簡単な回路構成で異なったテレビジョン標準方式と同期
のとれたフレーム信号が得られる。(Effects of the Invention) As described above, according to the present invention, since the PAL system and the NTSC system are synchronized using a common frame, the signals of both systems are independent, and the evenness of the fields may be different or reversed. Can there be any problems with scanline conversion and frame conversion etc? ! Frame signals synchronized with different television standard systems can be obtained with an extremely simple circuit configuration without the need for complicated circuits.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明のテレビジョン信号同期変換装置の一実
施例のブロック系統図、第２図はＰＡＬ方式からＮＴＳ
Ｃ方式へのフィールド変換の原理図、第３図はＮＴＳＣ
方式からＰＡＬ方式へのフィールド変換の原理図、第４
図は第１図実施例における説明用波形図、第５図は第１
図実施例における各部の波形のタイミングチャートをそ
れぞれ示す。 １・・・ＶＴＲ１２，５，９，１１・・・出力端子、３
・・・ＰＡＬフレーム信号発生器、 ４・・・スイッチ回路、６・・・タイムコードリーグ、
７・・・ＮＴＳＣ発振器、 ８・・・ＮＴＳＣフレーム（ｆｆｉ号発生志、１０・・
・同期遅延回路。 才　４　目 才　２　躬 才　ラ　図 νｌ ｔ４　周 才　ぢ　關 ； （Ｄ）　　　　　　ｃＬFig. 1 is a block diagram of an embodiment of the television signal synchronization conversion device of the present invention, and Fig. 2 shows the conversion from PAL to NTS.
Principle diagram of field conversion to C format, Figure 3 is NTSC
Principle diagram of field conversion from system to PAL system, 4th
The diagram is an explanatory waveform diagram for the embodiment in Figure 1, and Figure 5 is an explanatory waveform diagram for the embodiment in Figure 1.
3 shows timing charts of waveforms of various parts in the illustrated embodiment. 1...VTR12,5,9,11...Output terminal, 3
... PAL frame signal generator, 4... Switch circuit, 6... Time code league,
7...NTSC oscillator, 8...NTSC frame (ffi number generation intention, 10...
・Synchronous delay circuit. (D) cL

Claims (1)

【特許請求の範囲】 テレビジョンの標準方式である第１方式の ＶＴＲの出力信号により第１方式のフレーム信号を発生
する第１フレーム信号発生器と、ＶＴＲの出力信号によ
りスイッチング信号を発生するスイッチング信号発生器
と、前記スイッチング信号により前記第１方式のフレー
ム信号をスイッチングするスイッチ回路と、前記スイッ
チ回路の出力する特定フレーム信号と同期がとれたテレ
ビジョンの標準方式である第２方式のフレーム信号を発
生する第２フレーム信号発生器とを備え、前記第１方式
のフレーム信号の周期と、前記第２方式のフレーム信号
の周期との最小公倍数のフレーム周期を同期周期とし、
スイッチング信号発生器は前記スイッチ回路に入力する
第１方式のフレーム信号の内前記同期周期に対応したフ
レーム信号を通過するようにし、前記通過フレーム信号
により前記第２フレーム信号発生器に同期をかけて第２
方式のフレーム信号を得るようにしたことを特徴とした
テレビジョン信号同期変換装置。[Claims] A first frame signal generator that generates a frame signal of a first system based on an output signal of a first system VTR, which is a standard television system, and a switching device that generates a switching signal based on an output signal of the VTR. a signal generator, a switch circuit that switches the frame signal of the first method using the switching signal, and a frame signal of a second method that is a standard method for television and is synchronized with a specific frame signal outputted from the switch circuit. a second frame signal generator that generates a synchronization period, and a frame period that is the least common multiple of the period of the frame signal of the first method and the period of the frame signal of the second method,
The switching signal generator passes a frame signal corresponding to the synchronization period among the frame signals of the first method input to the switch circuit, and synchronizes the second frame signal generator with the passing frame signal. Second
A television signal synchronization conversion device characterized in that it obtains a frame signal of the system.
JP59196428A 1984-09-19 1984-09-19 Device for converting synchronization of television signal Pending JPS6173489A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP59196428A JPS6173489A (en) 1984-09-19 1984-09-19 Device for converting synchronization of television signal
DE1985306688 DE176324T1 (en) 1984-09-19 1985-09-19 DEVICE FOR SYNCHRONIZING VARIOUS TELEVISION SYSTEMS.
EP19850306688 EP0176324B1 (en) 1984-09-19 1985-09-19 System synchronizing apparatus
DE8585306688T DE3577381D1 (en) 1984-09-19 1985-09-19 DEVICE FOR SYNCHRONIZING DIFFERENT TELEVISION SYSTEMS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59196428A JPS6173489A (en) 1984-09-19 1984-09-19 Device for converting synchronization of television signal

Publications (1)

Publication Number Publication Date
JPS6173489A true JPS6173489A (en) 1986-04-15

Family

ID=16357675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59196428A Pending JPS6173489A (en) 1984-09-19 1984-09-19 Device for converting synchronization of television signal

Country Status (1)

Country Link
JP (1) JPS6173489A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325179A (en) * 1991-08-01 1994-06-28 Instant Replay, Inc. Circuitry and method for converting 50 Hz, 312.5 line video composite signals into and from 60 Hz, 262.5 line video composite signals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325179A (en) * 1991-08-01 1994-06-28 Instant Replay, Inc. Circuitry and method for converting 50 Hz, 312.5 line video composite signals into and from 60 Hz, 262.5 line video composite signals

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