JPS6013359A - Pulse code modulation recording and reproducing device - Google Patents
Pulse code modulation recording and reproducing deviceInfo
- 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
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
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.
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)
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.
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)
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)
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 |
-
1983
- 1983-07-01 JP JP11809383A patent/JPS6013359A/en active Granted
Patent Citations (2)
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)
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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