JPS6069802A - Sound and video multiplexing device - Google Patents
Sound and video multiplexing deviceInfo
- Publication number
- JPS6069802A JPS6069802A JP58175323A JP17532383A JPS6069802A JP S6069802 A JPS6069802 A JP S6069802A JP 58175323 A JP58175323 A JP 58175323A JP 17532383 A JP17532383 A JP 17532383A JP S6069802 A JPS6069802 A JP S6069802A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- circuit
- modulated
- sound signal
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
- H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
- H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
- H04N9/835—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal
- H04N9/8355—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal involving processing of the sound signal the sound carriers being frequency multiplexed between the luminance carrier and the chrominance carrier
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は回転ヘッド型磁気記録再生装置（以下ＶＴＲと
称す）において、音声１ム号葡映像信号に周波数多重す
る装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for frequency multiplexing audio and video signals in a rotating head type magnetic recording/reproducing device (hereinafter referred to as a VTR).
従来例のｆ１１Ｉ５：成とその間笛点
従来、回転へノドＶＴＲにおいて、音戸・信号は第１図
に示すように、映像信号とは独立して、磁気テープ上に
、その長手方向のトラックに記録されていた。第１図に
おいて、１ば１萩気デープ、２は映像信号全記録したト
ラック、３は音声信号を記録したトラノつてある。Conventional example: f11I5: The point between the start and the whistle. Conventionally, in a rotating VTR, the sound signal is recorded on a track in the longitudinal direction of the magnetic tape, independently of the video signal, as shown in Figure 1. It had been. In FIG. 1, 1 and 1 are the Hagi deep tracks, 2 is a track on which all video signals are recorded, and 3 is a track on which audio signals are recorded.
この従来例の欠点は同一テープ長で記録時ｌｌ″＋１ヲ
長くする、すなわち面記録密度全土げるためにデーブ走
行速度？遅くする場合に、４重信号の再生性能が劣化す
ることである。これ＆：Ｉ、賎速反の故に音声トラック
上の記録波長が短くなり、音Ｊ）・磁気ヘッドから良質
の再生信号かｆ（１られなくなるからである。The disadvantage of this conventional example is that when recording with the same tape length, the recording time is lengthened by 1''+1, that is, when the tape running speed is slowed down to increase the total areal recording density, the reproducing performance of the quadruple signal deteriorates. This is because the recording wavelength on the audio track becomes shorter due to the speed reversal, and the magnetic head no longer receives a high quality reproduction signal.
発明の目的
本発明はかたる従来の間誼点ケ解消−Ｊ−るもので、良
好な音声再生特性をイ１７・ること全１−１的とする。OBJECTS OF THE INVENTION The present invention overcomes the disadvantages of the prior art and provides good audio reproduction characteristics.
発明の構成
この目的を達成するために本発明は音声信号全映像信号
に周波数多重する定めの変調回路を設け、その搬送波周
波数を回転ヘッドの回転数に対応する周波数ｒて力倍し
た周波数に等しくしたものである。Structure of the Invention In order to achieve this object, the present invention provides a predetermined modulation circuit for frequency multiplexing all audio signals and video signals, and has a carrier wave frequency equal to the frequency multiplied by the frequency r corresponding to the rotation speed of the rotary head. This is what I did.
この構成によって、音声信号は従来の長手方向トラック
記録の低速再生による低品位の再生信号ではなく、回転
ヘッドによる高速再生による高品位の再生信号となり、
さらにその搬送波周波数ぼ、回転ヘッドの回転数に対応
する周波数音て９倍した周波数であるから、再生搬送周
波数は明確であり、回転ヘッド回転数に関係つげて確実
に復調することができるとｒう作用を句゛する。With this configuration, the audio signal is not a low-quality reproduction signal due to low-speed reproduction of conventional longitudinal track recording, but a high-quality reproduction signal due to high-speed reproduction by a rotating head.
Furthermore, since the carrier wave frequency is 9 times the frequency corresponding to the rotational speed of the rotating head, the reproduced carrier frequency is clear and can be reliably demodulated depending on the rotational speed of the rotating head. Express the effect.
実施例の説明
第２図は、本発明による回転ヘッドＶＴＲの一実１Ｉ（
Ｉｉ例、第３図に本発明による記録１７、号の周波数配
列例である。DESCRIPTION OF EMBODIMENTS FIG. 2 shows an example of a rotary head VTR according to the present invention.
In Example II, FIG. 3 shows an example of the frequency arrangement of record No. 17 according to the present invention.
以下、本発明の一実施例を第２図、第３図を用いて説明
する。An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.
第２図において、４は映像信号入力端子、５に輝度、色
信号分前１回路、６は周波数変調回路、７は周波数変換
回路、８は混合回路、９は音声信号入力端子、１０は変
調回路、１１は記録用増幅回路、１２は記録け）、再生
（Ｐ）の切換スイッチ、１３は回転へノド部、１４．１
４′はそれぞれ磁気ヘッド、１５ｖ′ｓ、回転へノド部
１３を回転させるモータ、１６は回転ヘッド回転数検出
器、１７は再生用増幅回路、１８は映像信号分げ１回路
、１９は映像１？ｉ号復調回路、２０は映像信νじ出ノ
ル：！ｔｆｒ、２１ば音声信号骨髄８回路、２２は音重
信シナ復調回路、そして、２３ば、音声信号出力端子で
ある。In Fig. 2, 4 is a video signal input terminal, 5 is a luminance signal, 1 circuit for color signals, 6 is a frequency modulation circuit, 7 is a frequency conversion circuit, 8 is a mixing circuit, 9 is an audio signal input terminal, and 10 is a modulation circuit. circuit, 11 is a recording amplifier circuit, 12 is a recording/playback (P) changeover switch, 13 is a rotating throat section, 14.1
4' is a magnetic head, 15V's, a motor for rotating the throat part 13, 16 is a rotary head rotation speed detector, 17 is a reproduction amplifier circuit, 18 is a video signal dividing circuit 1, and 19 is a video signal 1 ? The i demodulation circuit, 20, outputs the video signal:! tfr, 21 is an audio signal bone marrow 8 circuit, 22 is an audio signal center demodulation circuit, and 23 is an audio signal output terminal.
第３図において、２４は低域変換色副搬送波信号、２５
は周波数変調輝度イ１１写、そして、２６ ＆：１：塵
調音声侶号である。In FIG. 3, 24 is a low-pass conversion color subcarrier signal, 25
is the frequency modulated luminance I11 copy, and 26 &:1: dust tone voice number.
映像信号は、入力端子４に印加され、輝度、色信号分げ
１−回路５によって輝度イ１−号と色副搬送波（ｌｉ号
とに分けられ、輝度信クーは周波数変調回路６で周波数
変調輝度信号２５とｆｒ、Ｖ）、色副搬送波イ１−１υ
は周波数変換回路７で低域変換色副搬送波信号２４とな
り、それぞれ混合回路８に送られる。The video signal is applied to the input terminal 4, and is divided into a luminance signal I1 and a color subcarrier (li signal) by a luminance and color signal dividing circuit 5, and the luminance signal is frequency modulated by a frequency modulation circuit 6. Luminance signal 25 and fr, V), color subcarrier i1-1υ
are turned into low frequency converted color subcarrier signals 24 in the frequency conversion circuit 7, and are sent to the mixing circuit 8, respectively.
−万、音声信号は入力端子９に印加さｎ、変調回路１０
に与えられる。このＣ副回路１０には回転ヘッド（ｎ１
転数検出器１６の出力信号が与えられている。回転数検
出器１６の出力信号の周波数は回転ヘッドの回転数に比
例するので、極めて安定な一定周波数である。その周波
数は、変調回路１０内でてい倍されて約Ｉ ＭＥ（ｚの
搬送波が作られる。- 10,000, the audio signal is applied to the input terminal 9, the modulation circuit 10
given to. This C subcircuit 10 has a rotating head (n1
The output signal of the rotation speed detector 16 is given. Since the frequency of the output signal from the rotation speed detector 16 is proportional to the rotation speed of the rotary head, it is an extremely stable constant frequency. The frequency is multiplied within the modulation circuit 10 to create a carrier wave of approximately IME(z).
この搬送波は音声信号で変調されて、変調音声信号２６
となり、混合回路８に送られ、ここで低域変換色副搬送
波信号２４および周波数変調輝度信号２５と周波数多重
される。第３図は、この多重波の周波数配列？示す。変
調音声信号２６は、映像関係の２信号、２４および２５
のかさな９合う境界領域に配置されている。この周波数
多重波は、記録用増幅器１１によって増幅され、四側に
倒されている切換スイッチ１２を経てモータ１５で正確
に回てれている回転ヘッド部１３にある磁気ヘッド１４
．１４”に供給されて、磁気テープ（図示せず）上に記
録される。This carrier wave is modulated with an audio signal to produce a modulated audio signal 26.
The signal is sent to the mixing circuit 8, where it is frequency-multiplexed with the low-pass converted color subcarrier signal 24 and the frequency modulated luminance signal 25. What is the frequency arrangement of this multiplex wave in Figure 3? show. The modulated audio signal 26 includes two video-related signals 24 and 25.
It is placed in the boundary area of the Kasa na 9. This frequency multiplexed wave is amplified by a recording amplifier 11, passes through a changeover switch 12 turned to the four sides, and then passes through a magnetic head 14 in a rotary head section 13, which is accurately rotated by a motor 15.
．． 14'' and recorded on a magnetic tape (not shown).
再生時、切換スイッチ１２は（Ｐ）ｉｌｌｌに倒され、
磁気′ヘッドｉ ４ 、１４’の出力は、再生用増幅回
路１７で増ｊ咄され、映像信号は映像信号分離８回路１
８、映像信号復調回路１９を経て、出力端子２０に現わ
れる。変調音声信号に、音声信号分篩１同路２１全通っ
て音声信号復調回路２２に送られる。搬送波は、回転ヘ
ッド回転数γでぃ倍した周波数であるから回転数検出器
１６の出力信号を与えることにより、所望の変調音声信
号は容易に検出される。During playback, the selector switch 12 is turned down to (P)ill,
The output of the magnetic head i 4 , 14' is amplified by the reproduction amplifier circuit 17, and the video signal is sent to the video signal separation circuit 1.
8, the video signal passes through the video signal demodulation circuit 19 and appears at the output terminal 20. The modulated audio signal passes through the audio signal sieve 1 and the same path 21 and is sent to the audio signal demodulation circuit 22. Since the carrier wave has a frequency multiplied by the rotating head rotation speed γ, a desired modulated audio signal can be easily detected by providing the output signal of the rotation speed detector 16.
すなわち、同期検波等の手段により、高品位の音声信号
全出力端子２３に現わすことができる。このように、搬
送波がｌＮ１転ヘッド回転数検出器１６の出力〒でい倍
することによって正確に４らノ１．るということは、Ｖ
ＴＲの記録時の行用を含む信号すなわち変調音声信号２
６を他の信号に比べて、小ｉい強度で記録しても良好に
Ｉ［ｆ生できろことｒ意味する。したがって、周波数多
１−Ｒ波で、７：ｆｌ’・ｆｉ’ｉ報金含む信号が映像
情報を含む信号に与える妨害を小さくすることができる
。すなわち、低域変換色副搬送波信号２４と、ｍ波数変
調輝度１８号２５との間に変調音声信号２６に人ｎるた
めの空ｌ？７１併１ｆ！Ｘ、全作る必要がないので、全
体の伝送帯域が狭くできる特長がある。That is, high-quality audio signals can be displayed at all output terminals 23 by means such as synchronous detection. In this way, by multiplying the carrier wave by the output of the lN1 rotating head rotation speed detector 16, it is possible to accurately calculate the carrier wave from 4 to 1. That means V
A signal including a row signal when recording a TR, that is, a modulated audio signal 2
This means that even if 6 is recorded at a lower intensity than other signals, it can be produced well. Therefore, in the frequency multiplied 1-R wave, it is possible to reduce the interference caused by the signal containing the 7:fl'·fi'i reward to the signal containing video information. That is, there is space between the low-pass conversion color subcarrier signal 24 and the wave number modulated luminance 18 and 25 for the modulated audio signal 26 to be present. 71 1st floor! X. Since there is no need to create all the components, the overall transmission band can be narrowed.
発明の効果
以上述べたように、本発明に訃いては変調音声信号の搬
送波周波数に回転ヘッド回転敷金てい倍した周波数であ
るので、再生時、搬送波が正確に作られるから下記の効
果が生じる。Effects of the Invention As described above, the present invention has the advantage that the carrier wave frequency of the modulated audio signal is multiplied by the rotary head rotation shim, so that the carrier wave is accurately created during reproduction, resulting in the following effects.
（１）変調音声信号の強度葡他に比べて小をくでき、映
像関係信号に与える妨害全軽減できる。(1) The strength of the modulated audio signal can be reduced compared to other methods, and all interference caused to video-related signals can be reduced.
（２）高品位の音声信号が再生できろ。(2) Able to reproduce high-quality audio signals.
（３）伝送帯域の狭いＶＴＲにて音声と映像の周波数多
重記録ができる。(3) Frequency multiplex recording of audio and video can be performed using a VTR with a narrow transmission band.
第１図は従来の音声信号記録を示す磁気テープ」二の記
録パターンの平面図、第２図は本発明の−実施例金示す
音声映像多重化装置のブロック図、第３図は不発明によ
る記録信号の周波数特性図である。
６−−周波数変調回路、７・・・・・・周波数変換回路
、８・・・・・混合回路、１ｏ・・・・・・変調回路、
１６°°パｌω転ヘッド回転数検出器。Fig. 1 is a plan view of a recording pattern on a magnetic tape showing conventional audio signal recording, Fig. 2 is a block diagram of an audio/video multiplexing device showing an embodiment of the present invention, and Fig. 3 is a non-inventive one. FIG. 3 is a frequency characteristic diagram of a recording signal. 6--Frequency modulation circuit, 7... Frequency conversion circuit, 8... Mixing circuit, 1o... Modulation circuit,
16°° pulse rotation head rotation speed detector.
Claims (3)
ｉ＋３全イイし、音声信号全映像信号に周波数多重する
変調１ｍ路を設け、前記変調回路の搬送波周波数は前記
回転数検出器より発する信号の周波数をてい倍した周波
数に等しい音声映像多重化装置。(1) At least a 1m modulation path is provided for frequency-multiplexing all of the video signals and audio signals to the rotation speed detector and the video signal, and the carrier wave frequency of the modulation circuit is the signal emitted from the rotation speed detector. audio/video multiplexing device whose frequency is equal to the frequency multiplied by .
搬送波信号、周波数変調輝度信号の順に並び、かつ、前
記音声信号によって変調はれた変調波信号は前記２信号
の境界領域にあるｑ′、＋１許請求の範囲第１項記載の
音声映像多重化装置。(2) The frequency array of the frequency multiplexed signal is arranged in the order of the low-pass conversion color subcarrier signal and the frequency modulated luminance signal, and the modulated wave signal modulated by the audio signal is located in the boundary area between the two signals. q', +1 The audio/video multiplexing apparatus according to claim 1.
る特許請求の範囲第１項または第２項記載の音声映像多
重化装置。(3) The audio-video multiplexing apparatus according to claim 1 or 2, wherein the strength of the audio modulation signal is smaller than that of the two signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175323A JPS6069802A (en) | 1983-09-22 | 1983-09-22 | Sound and video multiplexing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58175323A JPS6069802A (en) | 1983-09-22 | 1983-09-22 | Sound and video multiplexing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6069802A true JPS6069802A (en) | 1985-04-20 |
Family
ID=15994069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58175323A Pending JPS6069802A (en) | 1983-09-22 | 1983-09-22 | Sound and video multiplexing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6069802A (en) |
-
1983
- 1983-09-22 JP JP58175323A patent/JPS6069802A/en active Pending
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