JPS6013359A - Pulse code modulation recording and reproducing device - Google Patents

Pulse code modulation recording and reproducing device

Info

Publication number
JPS6013359A
JPS6013359A JP11809383A JP11809383A JPS6013359A JP S6013359 A JPS6013359 A JP S6013359A JP 11809383 A JP11809383 A JP 11809383A JP 11809383 A JP11809383 A JP 11809383A JP S6013359 A JPS6013359 A JP S6013359A
Authority
JP
Japan
Prior art keywords
signal
pulse
width
pulses
horizontal
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
JP11809383A
Other languages
Japanese (ja)
Other versions
JPH0520826B2 (en
Inventor
Takashi Eguchi
隆 江口
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11809383A priority Critical patent/JPS6013359A/en
Publication of JPS6013359A publication Critical patent/JPS6013359A/en
Publication of JPH0520826B2 publication Critical patent/JPH0520826B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To prevent the generation of noise by detecting a time width from the detection of a horizontal synchronizing signal to the detection of a data synchronizing signal, generating a pulse when the time width is kept at a fixed width against a reference format signal width, and interrupting the output when the pulse is extinguished. CONSTITUTION:A signal 4 is a synchronizing signal sliced at a slice level and a signal 5 detects a horizontal synchronizing signal from the synchronizing signal 4. A part A detects the width of the horizontal synchronization detecting signal 5 and the data synchronization detecting signal 3 and generates a pulse when the detected width is included within a fixed width to the reference format signal width. A part B generates a pulse 7 more than 17 horizontal sections, and if the pulses 6 are continuously inputted, generates the pulses 7 continuously. During the generation of pulses 7, a part C outputs the pulses 7 as they are, and if the pulse is extinguished, interrupts the input signal 8 to be inputted to an output signal 9. The input signals to be processed in the device are digital or analog signals.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、ビデオテープレコーダ（以下ＶＴＲと呼ぶ）
又は、その一部を利用して標準テレビジョン信号に準拠
したＰＣＭ信号を録音再生するＰＣＭ録音再生装置に関
し、ＶＴＲから再生される際のジッターやドロップアウ
ト等により、あるいは早送り再生や巻戻し再生モードに
した時に信号が短時間途切れたり、あるいはつなぎ録音
した時のつなぎ目のフルイレースされた未記録部分の再
生時には正確な信号処理が行なわれないので、その時に
は瞬間にデジタル信号あるいはアナログ信号の出力にミ
ューティングをかけ誤まった信号を出さないよう信号処
理を行ない、正確なＰＣＭ信号再生が行なえるようにし
たものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a video tape recorder (hereinafter referred to as VTR).
Or, regarding a PCM recording and playback device that uses a part of the PCM signal to record and play back PCM signals compliant with standard television signals, jitter or dropouts when played back from a VTR, or fast forward playback or rewind playback mode may occur. When the signal is interrupted for a short time when the signal is turned on, or when playing back the fully erased unrecorded part of the splice recording, accurate signal processing is not performed. By applying muting, signal processing is performed to prevent erroneous signals from being output, and accurate PCM signal reproduction can be performed.

（従来例の構成とその問題点） 第１図（ａ）はＰＣＭ信号の垂直区間、第１図（ｂ）は
ＰＣＭ信号の水平区間、第１図（ｃ）は水平同期信号と
データ同期信号（１０１０）の相対関係を示したもので
ある。このＰＣＭ信号フォーマットの垂直同期信号、水
平同期信号、データ同期信号が途絶えると雑音発生の原
因となり、何らかの手段で補なってやるか信号出力を遮
断したりする必要がある。(Configuration of conventional example and its problems) Figure 1 (a) is the vertical section of the PCM signal, Figure 1 (b) is the horizontal interval of the PCM signal, and Figure 1 (c) is the horizontal synchronization signal and data synchronization signal. (1010) shows the relative relationship. If the vertical synchronization signal, horizontal synchronization signal, and data synchronization signal of this PCM signal format are interrupted, it causes noise generation, and it is necessary to compensate for it by some means or to cut off the signal output.

（発明の目的） 本発明は、信号処理に必要な同期信号がなくなった時に
は、信号出力を遮断して不要な音を出さないようにミュ
ーティングをかけたＰＣＭ録音再生装置を提供するもの
である。(Objective of the Invention) The present invention provides a PCM recording and playback device that mutes the signal output so that it does not produce unnecessary sounds when the synchronization signal necessary for signal processing is lost. .

（発明の構成） 本発明は、水平同期信号を検出してからデータ同期信号
を検出するまでの時間幅を検出し、その幅が標準フォー
マット信号幅に対しである一定幅である場合にはパルス
を発生させて、そのパルスが途絶えた場合には出力を遮
断して郊：音の発生を防止するようにしたものである。(Structure of the Invention) The present invention detects the time width from when a horizontal synchronization signal is detected to when a data synchronization signal is detected, and when the width is a certain width with respect to the standard format signal width, a pulse is generated. is generated, and when the pulse is interrupted, the output is cut off to prevent the generation of noise.

（実施例の説明） 第２図は本発明の一実施例を示すブロック図である。１
はＶＴＲから再生されたＰＣＭ信号の入力端子、２は第
１図のスライスレベルＤでＰＣＭ信号をスライスしたデ
ータ信号で、３はそのデータ信号２中よりデータ同期信
号（１０１０）を検出した信号、４は同様に第１図のス
ライスレベルＳでスライスした同期信号、５はその同期
信号４より水平同期信号を検出した信号である。(Description of Embodiment) FIG. 2 is a block diagram showing an embodiment of the present invention. 1
is the input terminal of the PCM signal reproduced from the VTR, 2 is the data signal obtained by slicing the PCM signal at slice level D in FIG. 1, 3 is the signal in which the data synchronization signal (1010) is detected from the data signal 2, 4 is a synchronization signal similarly sliced at the slice level S in FIG. 1, and 5 is a signal obtained by detecting a horizontal synchronization signal from the synchronization signal 4.

第２図のＡ部は、水平同期検出信号５とデータ同期検出
信号３との幅を検出し、標準フォーマット信号幅に対し
て、ある一定幅以内である場合にはパルス６を発生させ
るものである。第２図のＢ部は、パルス６がくると１７
水平区間以上のパルス７を発生させるものであり、連続
してパルス６がくるとパルス７も連続して発生しつづけ
る。第２図の０部は、パルス７が発生している間は入力
信号８をそのまま出力し、パルス７が途絶えたら出力信
号９へ、入力してくる信号８を遮断しようとするもので
ある。ここで扱う入力信号は、デジタル信号であったり
アナログ信号であったりする。Part A in Fig. 2 detects the width of the horizontal synchronization detection signal 5 and data synchronization detection signal 3, and generates a pulse 6 if the width is within a certain width with respect to the standard format signal width. be. In part B of Fig. 2, when pulse 6 comes, 17
It generates pulses 7 over a horizontal interval, and when pulses 6 occur continuously, pulses 7 also continue to occur continuously. Part 0 in FIG. 2 outputs the input signal 8 as it is while the pulse 7 is being generated, and when the pulse 7 is interrupted, the input signal 8 is cut off to the output signal 9. The input signals handled here may be digital signals or analog signals.

（発明の効果） 本発明は、ＰＣＭ信号中の水平同期信号とデータ同期信
号の相対関係が所定のフォーマットでなくなった時には
入力信号を遮断して、雑音等の発生のない高品位のＰＣ
Ｍ録音再生を可能にするものである。(Effects of the Invention) The present invention cuts off the input signal when the relative relationship between the horizontal synchronization signal and the data synchronization signal in the PCM signal is no longer in a predetermined format.
This enables M recording and playback.

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

第１図はＰＣＭ信号フォーマットを示す図、第２図は本
発明のブロック図である。 ３− １　・・・入力端子、２　・・・データ信号、　３・・
・データ同期検出信号、　４　・・・同期信号、５　・
・・水平同期検出信号、　６・・・所定フォーマット時
のパルス発生信号、７　・・・１７水平区間以上のパル
ス発生信号、　８　・・・入力信号、　９　・・・出力
信号。 特許出願人　松下電器産業株式会社 ４−FIG. 1 is a diagram showing a PCM signal format, and FIG. 2 is a block diagram of the present invention. 3- 1...Input terminal, 2...Data signal, 3...
・Data synchronization detection signal, 4 ... Synchronization signal, 5 ・
. . . horizontal synchronization detection signal, 6 . . . pulse generation signal in a predetermined format, 7 . . . pulse generation signal over 17 horizontal intervals, 8 . . . input signal, 9 . Patent applicant Matsushita Electric Industrial Co., Ltd. 4-

Claims (1)

【特許請求の範囲】[Claims] 標準テレビジョン信号に準拠したＰＣＭ信号の水平同期
信号と、データ同期信号との相対時間差が一定幅以内で
ある場合にパルスを発生させる第１の手段と、その第１
の手段のパルスが発生すると１７水平同期区間以上のパ
ルスを発生する第２の手段と、第２の手段によるパルス
が発生している時は入力信号をそのまま出力し、第２の
手段によるパルスが発生していない時には入力信号を遮
断する第３の手段とを僅えたことを特徴とするＰＣＭＥ
録再生装置。a first means for generating a pulse when a relative time difference between a horizontal synchronization signal of a PCM signal conforming to a standard television signal and a data synchronization signal is within a certain width;
When the pulse of the means is generated, the second means generates a pulse of 17 horizontal synchronization intervals or more, and when the pulse by the second means is generated, the input signal is output as is, and the pulse by the second means is A PCME characterized in that a third means for blocking an input signal when no signal is generated is added.
Recording/playback device.
JP11809383A 1983-07-01 1983-07-01 Pulse code modulation recording and reproducing device Granted JPS6013359A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11809383A JPS6013359A (en) 1983-07-01 1983-07-01 Pulse code modulation recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11809383A JPS6013359A (en) 1983-07-01 1983-07-01 Pulse code modulation recording and reproducing device

Publications (2)

Publication Number Publication Date
JPS6013359A true JPS6013359A (en) 1985-01-23
JPH0520826B2 JPH0520826B2 (en) 1993-03-22

Family

ID=14727821

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11809383A Granted JPS6013359A (en) 1983-07-01 1983-07-01 Pulse code modulation recording and reproducing device

Country Status (1)

Country Link
JP (1) JPS6013359A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4951898A (en) * 1988-06-08 1990-08-28 Shimano Industrial Company Limited Double bearing reel
US5064139A (en) * 1989-01-30 1991-11-12 Shimano Industrial Company Limited Fishing reel with click-free anti-reverse mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654612A (en) * 1979-10-05 1981-05-14 Trio Kenwood Corp Muting control circuit for reproducer of pcm signal
JPS5687208A (en) * 1979-12-17 1981-07-15 Pioneer Electronic Corp Data section extracting circuit in reproducing device of video format pcm signal

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654612A (en) * 1979-10-05 1981-05-14 Trio Kenwood Corp Muting control circuit for reproducer of pcm signal
JPS5687208A (en) * 1979-12-17 1981-07-15 Pioneer Electronic Corp Data section extracting circuit in reproducing device of video format pcm signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4951898A (en) * 1988-06-08 1990-08-28 Shimano Industrial Company Limited Double bearing reel
US5064139A (en) * 1989-01-30 1991-11-12 Shimano Industrial Company Limited Fishing reel with click-free anti-reverse mechanism

Also Published As

Publication number Publication date
JPH0520826B2 (en) 1993-03-22

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