JPS5999888A - Multiplex recording system and multiplex recording and reproducing system - Google Patents

Abstract

PURPOSE:To improve the S/N of a reproduced sound signal by recording and reproducing an FM sound modulating signal by an exclusive rotary head so as to decrease mutual interference due to a beat between carrier frequencies and to almost eliminate moire in a reproduced screen. CONSTITUTION:Sound signals of left and right channels are inputted individually to input terminals 5, 6 of a recording system and the standard system color video signal is inputted to an input terminal 7. The sound signal from the terminals 5, 6 are delayed for 1H field by 1-field delay circuits 8, 11 respectively, the delayed signal and the signal not delayed are applied to frequency modulators 9-13, where the signals are frequency-modulated respectively to input to a mixing circuit 14. The 1st - the 4th sound signals subjected to the FM modulation are frequency-divided and multiplexed at 1-field period and applied to a sound signal recording/reproducing rotary head HA at each field. The video signal from the terminal 7 is applied to video signal recording/reproducing rotary heads H1, H2, to reduce the mutual interference of the carrier frequency due to the beat and to improve the S/N of the reproduced sound signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a multiplex recording method and a multiplex recording/reproduction 7'J method, and in particular, it records an audio signal in the same 1 to 1000 kHz format as a video signal and reproduces it. Regarding the method.

Conventional technology Helical scanning 15-type magnetic recording and reproducing device (VTR
), a plurality of rotating heads, for example two rotating heads, are installed at equal angular intervals on a rotating body such as a rotating drum, and a magnetic tape is attached and wound around the rotating body over an angular range of, for example, over 180 degrees. The video signal is recorded on the magnetic j-b by a rotating head, and the 8 river record is recorded by a fixed head installed in the middle of the magnetic j-b traveling path, and during playback, the video signal is recorded by the rotary head. It is well known to reproduce audio signals using a fixed head.

14j, ■ ``The recording and reproducing time of R has tended to become longer in recent years, and the running speed of the magnetic disk (-i speed has increased with the
There is also a trend toward lower speeds for audio signals (3L fixed head). Due to magnetic
)--Recorded in SeaL.

Because it is 1 again, the relative linear velocity between the -J and B heads is low, and the magnetic l-p travels? If the j speed is made close, the rotating head (
Compared to the frequency characteristics of the video transmission recorded from
C' Lmai, high quality audio signal record' [Gadesa 4
It was c.

Therefore, conventionally, the 1%)'
-j: A method has been proposed in which 9 According to
The high-pitched voice A5-8 was recorded by the rotating rat at a high relative linear velocity between the heads, and
Since it is re/j, if the traveling speed of magnetic = 7' -B is stored, C・Atsu (fJ, when recording and reproducing Takaichi Shin y4 with a fixed head without slowing down the J speed) However, in the above-mentioned proposal, the problem to be solved by the invention is much higher than that of the above-mentioned method.
J Frequency modulation radiant anti-transmission signal and low-pass conversion carrier color (Mutsuki, 1,
Superimpose it on another video signal, and record this Φ tatami fiI 5 on the same one-turn head. There was a problem with the interference (L).

'tt-r, the present invention is a multi-Φ, -IC recording method that solves the problem in 1. Regeneration Puno (111, 5) is the [] target.

Solve the problem by using the two-stage present invention (1) to place the magnetic recording medium within a certain angle range.
(Spliced and wound! On the rotating body, the slope iJ] Multiple images with different angles of 7 gins (Record of No. H/'+14')
The rotary head for audio transmission recording/Njli is installed in a large scale, and the rotary head for video transmission recording/playback has a different azimuth angle. Obtain the first frequency modulated Takayama signal and obtain the second frequency modulated G voice signal which is delayed for every other 11-rack scanning period P, n (from No. 3, t, 2nd frequency modulated g voice signal). These are the same scanning period C frequency division multiple Φ - C sound mountain signal recording/reproduction rotary head 1 It runs by the head.”
I, +I multiplex the frequency on the recording medium; I, the first
．． Record the second frequency modulated a angle signal t, 7-he mountain 1
When the rack is formed from 21 to rack pick f-C, in the fall, a video track in which video 1i1 is recorded on the L magnetic recording medium is formed on the video signal recording/internal rotary head from 11 to rack pick f-C, and Already recorded 8'4""l'
- Video 1 on rack 1L Synthesize them in chronological order and extract them.

Embodiment Figures 1 and 2 show an example of the head arrangement relationship, etc. in the People's Book Komyo Manj. In both figures, the same component parts are shown as (
, 1 same sign 8 (;j' LU exists. d3 in both figures (
, As an example of a homorotor, the surface of rotation of the rotating dome 1 of -(,
2 (Yo, video transmission, 1-pin beef cattle rotary heads 1-11 and 1-1 are facing each other at a distance of 180゛)
'klj cJ5su, kak, 1-1] Transfer head 11
1) Same rotating direction + = angle 1) j O/do (j 9 I
A high-pitched voice Qi is placed in the position where J3 old records are used.The rotating head 1-11Δ is fixed. '
-11- Height position - facets of f are fixed Drano, 2 11] 52 vs. t,, 7-' U l oku
] ＼ td J distance - 1, in the position of 1 direction (J
(Ori, again! 41 Ki no 13 is the guide ball 4a
, 4b with an angular range of just over C180' 1. d[
i']] (, ka') is inclined and wound around the -C co-rotating i-n j\1.In recording and reproducing (1), the rotary tram 1 is rotated at the opposite time in Fig. 1, ? 1f'J direction (C is rotated, then the magnetic tape -f31.LX runs in the direction of the horn -11 is shown.

The rotating spatula F' tl +, Hz is 77, and the azimuth angles are different, so the rotating head 1-
IA is selected to have an azimuth angle sufficiently larger than the azimuth angles of rotating heads 1-II and H2. As described later, the image 1 recorded and formed by the rotating head 1-12
-High voice 1 recorded by rack rotating head HA
The spatula is at the same position (J recording is formed, so the j7 angle difference between both the rotating spatulas L" If I and 1-IA is compared to the rotating spatula L" If I Do 1-)A. It is convenient for someone to do this. You can also convert the audio signal to video (;-
To reduce mutual interference with the signal, l: < ly T playback I
The third one is the rotating head LIA's illumination is the rotating head! -11, 1-1) j's\・s angle and Tatsumi 41
There are 6 degrees that make it appear, and you can do the tenth phase v)-i small (j
1. The same rotation head lI so as to re-'I'C.
It is desirable to select an azimuth angle sufficiently larger than the azimuth angle of t-12. In view of the above Q, as an example, the angle of rotation head [11]' is selected to be -6°, that of 1-12 is -6°, and the deviation of 1]△ is selected to be -30°. ing.

Also, the image 1 recorded and formed by the rotating head tl 2
J to rack and rotating head l-18, s1. L! The recorded sound is formed with a rack for I'' and a position IJ for people;
T! To form a recording, as described above, the rotating head 11 △ is the rotating spatula 1゛1] 1, the rotational angle is 0 (-1), and the height I is (1). For example, the 11 diameter of C1 rotating drum 1 is C32m1llC1θkl 55°, (11418/
,! m was selected (there is. 4r ah!
/do(height position is Tatsumi 4f/=me, times←, spatula 1'
! The starting edge of the high ij, i 1·-not/) recorded by IAM is the image fG! recorded by the rotating spatula 1-). l・>') Ri no Hajime Oa J, Rishi IJ3u
The m culm [crazy zare ζ] is
Yes, real 1? 'i-) Do you ignore it?C'Saru.

Next, the fl of this defense, the bow processing system (this one,;) Mei 4ru (J, Figure 3 IJ the first fruit of the record system of Honsho Mei 6% f?I
(1) shows a systematic diagram, Figures 1 and 2 in the same figure.
The same as in the figure (in the acid part (yo 1 [■ - note moon is A 1). The transmission signal and the 6" FA7 channel's ?IIn Buddha Shira are input separately (this comes in, and the standard method video signal is coming to the input end f7. The person is coming to the input end r5!, :ノ1 The audio signals of the 7 channel are delayed by the 1-yield delay circuit 8 for a period equal to the 1-yield period (e.g., about 1'60 seconds) of the recorded standard color video signal. After that, it is supplied to the frequency modulator 9.

1k, -1- the left channel 17 signal is also directly supplied to the frequency modulator 10 without being delayed;
(1 !! 'J, directly supplied to frequency modulator 133.

1 Fatald 1LFFI extension circuit 8 and 11 are the same -one -drawn -13, Hake L -1 Lige I ~ device (B B D) ＼) FA7 , the frequency modulator 9 transmits the 7-channel sound signal to h which is delayed by one field. The carrier wave frequency f1 (for example, 1.IM, 117) is frequency modulated (FM) L'?: Outputs the first FM high-pitched signal. Frequency modulates the wave frequency "4 (for example, C85M t-(z)) and outputs the second FM Hatakeyama Dengetsu.Ma/j frequency modulator 12133f 1-Noyeld Akima Serinobu!1
．． I, '1~7 Neru Changsei Jin 8 or i! ! 3. ! Is it (ihii i 'f)'? 1 voice transmission; carrier wave frequency f (e.g. (.[+, 3', + Mllz)
, fl (e.g. L6MH7) and -C third
3゜4th [~18 tones (output g month) 1゜1st above
〒〒4th F M E (F'j (V: For example, λ people hA people frequency deviation!: 1ooKth l selected - (a5 1, 10?■ open circuit 14 supply ('L trowel frequency component υ1 is multiplied. It is taken out from the mixing circuit 14 and 1, Well, 1 twirl 1 - Akima every (go 11 to I' 1iil -11, /i state [game that repeats closed 1 state etc.] - circuit 1 (-) (from this, 1 noi Ild Akima J3c! The signal is taken out to the FO and supplied to the recorder IIJ raw rotary head via the lance 16 to the logger 1.1-tally 1.

In this way, the 7% fiJi number of the two DIX7 channels is 1-field period A,;B for each %i7 channel.
The first audio signal of fo and the other second audio signals every one field period (No. 3 and -(...respectively different carrier frequencies ft, f4 (f 2 , f 3 ) are F M L-'
The first and second (third and fourth) FM audio signals obtained by U are frequency division multiplexed in the same 1 field period.
It is supplied to the rotating head (-IA) every time the field Akima J5 is opened.

On the other hand, the standard black video signal input to the input terminal 7 is supplied to a pixel signal recording system 17 and a carrier color signal recording system 18, where it is separated into a luminance signal and a carrier color signal, and then sent to a luminance signal reproducing system 17. For example, the sink depth level is 3.4M.
f-Izc whey 1 ~ peak level is 4.4M
It is converted into an M luminance signal with a carrier frequency shift of +-17 and taken out from the carrier color signal recording system 18, and is frequency-converted to a band lower than the band of the FM luminance signal. , Gah, in order to prevent cross me, it is extracted as a low frequency converted carrier color signal which has undergone processing such as well-known phase shift processing. The -1z low frequency conversion carrier color signal is supplied to a mixing circuit 19, frequency division multiplexed, and then supplied to the -C rotary heads H+, !-12 via rotary transformers 20, 21.

FIG. 4 shows an example of the frequency spectrum of each signal recorded and reproduced on the magnetic disk drive 3 according to the method of the present invention. In the figure, FMY indicates the F Miti signal wave number spectrum taken out from the luminance signal recording system 17 (), and C shows the signal wave number spectrum taken out from the carrier chrominance signal recording system 181). The frequency spectrum of the low-pass converted carrier chrominance signal is shown below. Also AI, Al, A3 and A4 are people said first,
Second. 33rd and 4th 1-M audio signal frequency spectrum 1~ram is accepted. As shown in Fig. 4, the first to fourth F
The M audio signal has a frequency band near the lower limit frequency of the FM luminance signal, and is recorded at a saturation level.

Next, the Arp pattern in the method of the present invention will be explained. Now, suppose that the rotary head 1-IA starts recording the frequency division multiplexed signals of the first to fourth FM audio signals on the magnetic data 130, then an audio track that is inclined with respect to the longitudinal direction of the tape is recorded. From the time when the rotation period of the rotating drum 1 at the angle θ shown in FIG. On the other hand, a video 1 rack begins to be formed in which frequency division multiplexed signals consisting of the FM luminance signal and the low frequency conversion carrier color signal are recorded at different positions on the upstream side.

The audio track by the rotating head 1-IA [-rack and the video track by the rotating head 1-IA] are formed simultaneously with a certain time difference, and furthermore, the rotating head 1-IA comes close to the guide ball 4b f=J shown in FIG. Do, rotating head 1
-11 finishes recording the rack on one video 1 (this means that the recording of one audio 1 to rack ends before the above-mentioned fixed time), and then the rotating head 12 records and forms a video track. start.

Here, the position where the rotating head [2] records and forms the video track is a position that differs by one track pitch on the deep stream side from the C video 1 to Rack that is recorded and formed by the rotating head 1-11. One fame track has been recorded. Therefore, the rotary head 112 records and forms a video track superimposed on one audio track that has already been recorded. Here, low frequency first to fourth FM audio signals as shown by A+ to A4 in FIG. 4 are recorded on the audio track, but these FM audio signals have relatively long recording wavelengths. Therefore, the information is recorded deep into the magnetic layer of the magnetic tape 3 at a saturation level.

On the other hand, among the video signals recorded over the audio track, FMI! The i degree signal has a high frequency as shown at 1M-Y in Figure 4! Since the information is mainly recorded on the surface layer of the magnetic layer of the magnetic tape 3, the already recorded [M audio signal is recorded without being erased. On the other hand, since the low frequency conversion carrier color signal has a lower frequency than the FM audio signal as shown by C in FIG. If you manually record where the FM audio signal has already been recorded, you will almost erase the previously recorded FM audio signal. However, while the FM audio signal is recorded at the saturation level as described above, Later superimposed - [Since the recorded low-band converted carrier color signal is recorded at a level lower than the saturation level, the degree of erasure of the FM audio signal by the low-band converted carrier color signal is not very large, and the FM audio signal remains at a renewable level.

Therefore, even if a video track is recorded and formed by the one-rotation head 1-12 overlapping the recorded edge audio track, the FM audio signal is recorded at a reproducible level, and the low frequency conversion carrier color signal and F The -M bright melon signal will also be recorded at the same magnetic tape position.

The rotating head is rotated again at a point slightly earlier than the recording of the rack ends].
Due to Δ, audio 1 to rack begin to be recorded at a position 21 rack pitches away from the audio track recorded immediately before. In this way, an audio track in which an FM audio signal is recorded by the rotary head l-IA is formed in two track bits on the C1 magnetic tape 3, and a low frequency conversion carrier color signal is recorded by the rotary heads f-1+ and H2. and FM
The video tracks 1 to 1 on which the optical signal is recorded are formed by one track bit, and the video tracks are recorded and formed in an overlapping manner on the already recorded sound angle by the rotary head H2.

FIG. 5 is a diagram showing an example of a tape pattern in the method of the present invention.Among the tracks that are inclined with respect to the longitudinal direction of the tape 3, the inclined track numbers on the white background are recorded and formed by the rotary head 1''1. The diagonal track with diagonal lines indicates the 1-high voice 1- rack and rotation 1
Indicates the track positions where the racks and racks are recorded overlappingly.'1. ．． Further, 1W indicates l~rack σ~rack width C' of one tree, and here, both the Pl mountain track and the video 1~rack have the same track width, and TW indicates 1-rack pitch. Here, since no guard band is formed between adjacent 1-racks, the 1-rack pitch TW and l
・Equal to rack width. Each track has 13 videos recorded for one field. In Fig. 5, Tc indicates the roll signal recording track,
TA indicates an audio signal recording track, and explanations of these recording systems and reproduction systems will be omitted since they have no direct relation to the gist of the present invention. Note that the above-mentioned track TA is a track directly recorded and formed by a fixed head without frequency modulating the audio signal, as in the past.Therefore, when the magnetic tape 3 is played back with a conventional VTR, the track TA is T
-A can reproduce audio signals.

Next, a second embodiment of the recording system according to the present invention will be described. FIG. 6 is a block diagram of the main part of the second embodiment of the recording system according to the present invention, and FIG. A block system diagram of an embodiment of the main part of the block system is shown.
Components that are the same as those in the diagram are designated with the same reference numerals.fil'L/'U
Also, since the video signal recording system is the same as that shown in FIG. 3, its illustration is omitted. In FIG. 6, the second FM audio signal extracted from the frequency modulator 10 is supplied to a delay and frequency conversion circuit 22, while being supplied to a mixing circuit 24.

On the other hand, the fourth FM extracted from the frequency modulator 13
The audio signal is supplied to a single J1 mixing circuit 24 which is supplied to a delay and frequency conversion circuit 23.

The delay and frequency conversion circuits 22 and 23 have the same configuration, for example, as shown in FIG.

In the figure, the second or fourth M8 voice signal inputted to the input terminal 25 is input into the digital memory 2G. The counter 28 is reset by applying from two input terminals a drum pulse having a period equal to one rotation period of the rotary drum 1 and synchronized with the rotational phase thereof, which is generated by a known means. In addition, the rectangular wave from the first oscillator 27 is multiplied by S1, and its counting output is applied to the digital memory 2G as an address signal.

As a result, the digital FM audio signal is extracted from the digital memory 2G for the bright area where one video track is recorded, that is, for one field in this case, and the digital FM audio signal is extracted from the digital memory 2G. A signal in the same band as the input [M audio signal at the input terminal 25 is converted into a sine wave and is then taken out and supplied to the frequency converter 31. For example 2.9
5M l-(iE sinusoidal wave of z is supplied, frequency conversion is performed between this sine wave frequency and the F M 'F4A sinusoidal frequency from the bandpass filter 30, and the output signal is passed through the frequency component of the difference between them. The signal is output to the C output terminal 34 through a bandpass filter 353 having frequency characteristics that cause waves.

Therefore, input terminal 25 has 1.85 to 11-17 :L
When a second [M audio signal of 100 kHz comes in, the output terminal 34 receives 1. IM Hz-): 10(
The first FM audio signal of lkl-1z is taken out and input to the input terminal 25.
When the fourth FM Shoto j signal comes in, output terminal 3
1.35 M for 4! -IZ±100k) A third FM audio signal of 1Z is taken out. The first . 3rd FM
The audio signal is supplied to a mixing circuit 24 where the second .
After being frequency division multiplexed with the fourth FM audio signal, it is supplied to the rotary head I-A via a rotary transformer 1G. Similarly to the first embodiment, the second embodiment shown in FIG. First to fourth)-M8 voice signals are provided.

In addition, in FIG.
f 21-j 3 is the condition).

Although the oscillators 27 and 32 are originally separate from each other, it is also possible to share the oscillators C11 with the same oscillation frequency. Further, the delay and frequency conversion circuits 22 and 23 are shown in the lj system in FIG. 9, and can also be shared by the recording system and the reproducing system.

In this embodiment: , 4 (return, 1 field i which is almost positive liv to reset 1 by drum pulse 1 of counter 28
The delay time (t) can be calculated.

Next, we will explain the regeneration system according to the present invention. Figure 8 shows the system diagram of the first embodiment of the regeneration system according to the present invention. Identical components have the same
There is a C with the number n attached. In Figure 8, there is J3, rotating head HA
5 is indicated by diagonal lines in FIG.
1 overlapping recording track) is scanned. Here, as mentioned above, the & voice track has an azimuth angle of 130, for example.
The video track recorded over this audio 1-rack is, for example, one rack recorded by the rotating head H2 of azimuth angle +6°. When the head tIA scans the above-mentioned overlapping recording tracks, only the first to fourth F Mu 7p2 signals are reproduced due to the 7-frame loss effect.

Also, the video 1-rack adjacent to both sides of the duplicate recording 1-rack on the magnetic tape 3 has an azimuth angle of, for example, -6°.
Since the number of tracks recorded by the rotary head 1-11 is 1, a guard band corresponding to the track width TW of this video track is substantially formed for the audio track. When scanning an overlapping recording track, it is possible to prevent the adjacent overlapping recording from being played back by replaying the recorded edge of the rack.

In this way, the first to fourth FM audio signals reproduced from the overlapping recording tracks scanned by the rotary head 1-(A) are transmitted through the rotary transformer 16 and the preamplifier 35, respectively, and the bandpass filter 36. 3-i 38 and 39, respectively.The bandpass filters 36, 37, 38 and 39 are supplied with the first and second .3rd and 4th 'pJ cow [M audio signal is frequency selected and taken out, F M 1+'j modulator/lo, 41.42 and 43
supply cover.

As a result, [M demodulator 40 outputs the FM of ';l1g1
High, a (ii) is tuned to [-M\!i], and the reproduction signal of the 1-field I/delayed right-X7 channel high voice signal is taken out and applied to the terminal a of the switch circuit 44, Also 1
One field from the M demodulator 42 is also channel r1.
The 11th signal of the transmission signal is taken out and applied to the terminal a of the switch circuit 45. At the same time, [M demodulator 4
From the FM demodulator 433, one signal of the left channel A7 channel B7+8 signal is taken out and supplied to the one field delay circuit 46 configured with a charge transfer element, etc. On the other hand, from the FM demodulator 433, the right channel 17 channel blind FN The reborn Buddhist gate numbered was taken out and 1
It is supplied to the field Takunobu circuit 47. 1 Neuild R
Each output signal of the extension circuit 46.47 is sent to the three-way circuit 44.
45 terminal l)←2 is applied.

Here, the switch circuit 4/1.45 and the switch circuit 53 to be described later are connected to the input terminal 48 + (1 incoming drum pulse (, 7), 1 (- rack 100 period (J here C) is 1 field 1 !11) is configured so that terminals a, l) i are switched and connected for each -Ca3, rotating head l-
IA is connected to the terminal a side during one field period (as shown in FIG. 33) during which 1B double recording 1~6 is scanned. 40 output signals, line I 1 il ji Φ double recording l-
Recorded in the rack - C2 (φ's left channel A7 channel high voice Buddha's father-in-law, 1) left channel A7 channel T before the left period
- The voice number is taken out (outputted to the output terminal 49).

Similarly, from the switch circuit 45, two types of right channel A non-channel audio signals (B 1, 1, 1, 1, 1, and 1) are taken out and outputted to the output terminal 50.

In addition, during duplicate recording 1-knock scanning with the above-mentioned co-rotating head [-1A, the C-rotating head [-11
is shown in white in FIG. .Pre-amplification crystal 51, and switch circuit 53 connected to %j 1=a at 11.
1, brightness iL, knee L, and q- system 54 are supplied to the number regeneration system 54 and the conveyed color signal regeneration yarn 55.
f'' M cut 11 beans 1V] is divided (-wave), this is 1-M demodulated and the original band of the beef cow 1q dengetsu 41!I is output to the mixing circuit 56. In addition, the conveyance color 8 and the cow yarn 55 are (111 low range conversion conveyance color (1+ ”; j
This is filtered by 4 minutes and returned to 6 which band 1fi, and the low frequency conversion 1 stage color transfer which is reproduced from the adjacent 18 Φ small recording 1-rack as a cross 1-one is combed. Remove C using a filter and run I'! ? The +- rack takes out only the 11th conveyed color (No. C-) and outputs it to the mixing circuit 556. The mixing circuit 56 mixes both of the above (C) and reproduces the 11th type color image Buddha g3. Do1 no (output terminal 57
Output to 4.

When the above rotating head ((△, 111) has finished scanning each 1-rack, the switch circuits /14, 45 and 53 are connected to the person//panting side i,, m 1i7J and the cane is connected. ,
The rotating head 12 starts scanning overlapping recording tracks. As a result, the rotating spatula 1"H2 receives the previously recorded FM voice signal (, 1 re-coup!f, the previously recorded i of the video track, Only the i signal is read again.On the other hand, the rotary head 112 reproduces and outputs the frequency division multiplexed signal consisting of the low frequency conversion carrier color signal and the Ffvl brightness signal which are recorded in the priority recording 1 to easy. This regenerative frequency division multiplexing gate is [''-tally transformer 21, preamplifier 5)2. It passes through a switch circuit 53 connected to the terminal side and is supplied to a -C luminance signal reproducing system 54 and a carrier color signal reproducing system 55.

Since the luminance signal 8 reproduction system 55.1 and the carrier chrominance signal reproduction system 55 perform the same operation as in () above, the signal from the mixing circuit 5 (3) to the output terminal 557 is recorded on the overlapping recording track -
The video signal for one field of C is output as a reproduction standard JJJ color video signal. (-like (ζ), according to this embodiment, the recording is formed by rotating heads t-l 2 and f-I A with different angles. ~The rack, the people's horse l
The rotating head H2, ) (A i-:, ), and the rotating head H2, ) (A i-:, ), are sequentially re-11-! F by the same rotating head
MB voice IJ No. 1 low [conversion carrier color 45 months and 1M luminance Iha No. J when recorded and played back at the same time /1? l'ru F M B'7. Low acid conversion carrier color (eight days and Color Eizoden 8A゛] High voice fA issue will be re-released in '14 -C.

Others 1. ．． ．． The same rotation head 11 of f note 1 - running the knock F double record 1 - During the period when you are blue] ]] Nor - 1: In the turn l\tsu hNA runs the same duplicate record tosic together,
／(=Doki (Blue blue drink, I, J he Funnel each 2
(The back of the hand <1-F-iVi Shoiii Jingo, '1-
After Noyield Akima]if-('Nunru 8 transmission is 1
- Noel 1: taken out from the delay circuit 46, and
The right button tunnel blue signal after the 1 field [-'' period is taken out from the 1 field d extension circuit 47, and these Ham
It is outputted to the output terminal j''-49, 50 through the switch circuit 44, 45. The C1 output terminal 49
．． At 50, the playback sound of the right channel \7 is always on.
, is trace 1. TI be taken out%<Correct order-C taken out.

In addition, in this embodiment, the switch circuit 44.4E5 is demodulated, regenerated, and switched between the symbols.
Even if the drum pulse has jitter of 11 degrees C, the high frequency F fVI high iij (switching the irises 8 and 7 compared to the case 7 and 7) can be heard.

In addition, as can be seen from the explanation below (1) (2. Repolymerization,
The j signal is +ji 4F, (Gaku'S' fJ J', Nonora video 1i3';'i L, 2 vs. ,
1 no-rudo period is about 1 (30 seconds, t1150 seconds C, this degree of time delay is practical-1-problem 4
F.

Figure 9 is the eastern part of the second embodiment of the recycled yarn of the Benakari method]
] The ivy system diagram is shown in small 4 degrees. In the same figure, the same components as in FIG.
Figure (, ni (-1) video signal (the IJ cow system is the same as in Figure 8). The FM71 voice transmission bow is supplied to the V-transmission and frequency conversion circuit 59, and the band-
Noirta 39. ．． l, removed fourth re-t:,
The I-M f'Iμj signal is sent to the delay and frequency conversion circuit 6.
0 +J: Supplied.

The delay and frequency conversion circuits 59 and 60 perform delay and frequency conversion between one noise and two (-■b (m transmission frequency r,
, r2 is a circuit that outputs 1 field 'B extension FM sound 1-ij (B number).Therefore, the hair extension and frequency conversion circuits 59 and 60 correspond to the H extension of the recording system shown in Figure 6 (C). -C of 1141) and frequency conversion circuit 22, 23, etc.
It can also be used in common with the delay and frequency conversion circuits 22 and 23.

The sweet two J circuit 44 is the first natural generation of the carrier frequency 11 from the band-filter 36 [-174 small Buddha bow and slow k
1 node from i and the frequency conversion circuit 59, and the second re() [ with the carrier frequency set to [1].
-M High Tiden 8 is switched to 77 every time between 1-twirl 1 and light (, these re-11-1-M sound part j signal H are synthesized in chronological order and C[~1st generation tone instrument Supply to 61 -4., -f
j, the switch circuit 45 reproduces the third reproduction of the carrier frequency [M11c8 and i'! from the bandpass filter 3ε3. 3σ
and the frequency conversion circuit 60 extends 1 field of sound transmission, and the carrier frequency is 12 + 11C.
Switch to each other - (, these playback FM blind μj j
The Ij bow is synthesized for the purpose of S system and is supplied to the CFM demodulator 62. By doing this, the FM demodulators 61, 62 to 1. L) ■-, E, -fX7 channel repolymerization T""
fj3 stops without being able to step on it. (It is taken out in the order of X.

In this embodiment, the FM demodulation circuit is system 1k (completed 1
．． Soft 1 fee-J let d spread M meshi j, l jI-Tl
The road is l-Tl t, \-(4ff-C, so]'-
TS [1g master) 1 fist j” 't Ill '-\Ikot]
Compared to this, the circuit IM configuration is during the song.

Modified example main departure 1! I is the above 1. C of 1) is limited to the second embodiment, and C of 1) is 4 sections, and 1) includes the following various variations. In other words, the record i1- is 4th 1st. Second F
In the embodiment, the M&voice signal is for each of the left and right 2 channels S channel! channel sound p3 (modulated fj number 3 and modulated fj number 17, recorded and played back 1M audio Buddha sh3 of type A in total)
In case of C, the sum signal and the difference signal of the audio transmission of the right 2JA7 channel can be used as the modulation signal, and in case of A, the number of fibers is 71 in the recording and reproducing system, but it is relatively simple. Due to the mounting cost of the inexpensive L-noral re'1 and the cost of the present invention, the recording convexity L and the edge medium can be reduced.

In addition, the signal may be limited to 2y\Nonnel souffle A, 18g, or 4゛, and the Noral high-pitched message C may be used.

Also,:'% ;! ; (c+''1'3 is i' digital 1 digit form 1 same form ('Record - [same as possible. Also, 1 field i' extension circuit 8.11.4f3.□・17 is metric circuit Using I: configure t) J, I. Historically, two rotating heads IA to 1, the rack width to 15 C than each of the rotating heads I11.fi2, J'. .

In the case of , the adjacent field i also has a width of 4ζ smaller than the 1-rack width of the 1-rack (this is C) because a card hand is formed.

Furthermore, the carrier frequency 1. , f ・ +3 and [4's F M E'< vocal signal (7) 1ffi W i,i
IE, fJ, /J 1-1"y? Express the im channel sound pj bracket 3 with 1<te', express these Takayama transmissions, 1(11-knock run b +01 while(
If one field is recorded on one track, the delayed signal is expressed as I) L and DR. , but not limited to, L.

R, DR, and DL, or R, I-, DI- and O
R1 or D[? , OL, L and R, and furthermore, the relationship between the modulation signal and the carrier frequency is The present invention is not limited to any of the above relationships.

Also, it takes only a short amount of time (J (approximately 90%)).By compressing the time and recording with BBD etc., and expanding the playback time, the audio A
It is also possible to record signals in an overlapping manner (more than 1 no yield), and switching noise can be reduced with higher precision.

Furthermore, by making the fall and fall of the A-D Δ signal, which is caused by switching noise during this A-burlap period, at a relatively gentle slope angle, foot-door, and fade-in, it is possible to reduce the Switching noise can be reduced.

Effects As described above, according to the method of the present invention, since the FM audio signal is recorded by a dedicated rotating head, it is possible to multiplex the FM audio signal and the FM video signal and record it using the same rotating head. Compared to the conventional method, the difference between carrier frequencies is reduced.
It is possible to significantly reduce phase 7j decoupling due to 1-, and therefore almost eliminate moiré on the playback screen, and record famous 1-racks every other track using a dedicated rotary head for audio signal recording. Recorded in the same position as the image 1 Herak ()
(As a result, compared to recording the video track and audio track without overlapping, the recording and playback time is not reduced, and moreover, one video track is effectively recorded between adjacent racks.) Since there is almost no gap between the grooves formed by guard bands, and there is only one rotary head for recording audio (No. 8 1□1), the Compared to the case of recording audio signals using Yoshikawa synchronized heads, the number of heads and rotary transformers can be reduced by one, making the configuration easier. In this case, the S/N ratio of the reproduced audio signal can be improved compared to when both tracks have the same width, and the reproduced FM audio signal can be This system demodulates the FM signals and then synthesizes them in time series through a switch circuit that performs switching every scan interval of one track, and has the advantage of being able to reduce and eliminate switching noise.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view showing an embodiment of the recording system according to the present invention, such as head arrangement, and FIG. 3 shows a first embodiment of the recording system according to the present invention. A pull lock system diagram, Fig. 4 shows an example of the frequency spectrum of No. 3 recorded and reproduced by the method of the present invention, and Fig. 5 shows an example of the j-b pattern recorded and reproduced by the method of the present invention.
6 is a block system diagram showing the main part of the '112 embodiment of the recording system of the present invention, and FIG. 7 is a block system diagram showing an embodiment of the main part of the block system shown in FIG. 6. Figure 8 is a block system diagram showing the first embodiment of the regeneration system according to the present invention, and Figure 9 is a block diagram showing the main parts of the second embodiment of the regeneration system according to the present invention. 1...Rotating drum, 3...Magnetic tape, 5.6...
・Audio signal input terminal, 7...Video signal input terminal, 8゜11.46.47...1 field delay circuit, 9゜i
o, 12.13...Frequency modulator, 16.20°21
...[]-Tally 1~Lance, 22, 23, 59°6
0... Delay and frequency conversion circuit, 25... 1M audio transmission input terminal, 26... Digital input, 29°4
8...Drum pulse input terminal, 34...[-M audio signal output terminal 1.40-43.61.62...7M demodulator, 44,45.53...Switch circuit, 49° 5
0.63.64...Playback audio signal output terminal, 57...
- Reproduction color video signal output terminal, I-4A...Rotary head for recording and reproducing sound signals, 1"1. Eye 2: Rotating spatula 1 for recording and reproducing video signals. Figure 4 Figure S W Figure 6 Figure F Procedural Amendment December 27, 1980 El Commissioner of the Patent Office Mr. R. Kazuo Sugi (Examiner of the Patent Office) 1. Indication of the case 1980 Jl Petition No. 209083-No.2
, name of invention multiple recording system and multiple recording internal system 3, person making amendment, applicant, address ri・2'21 Kanagawa, Yokohama city, 1 prefecture, Shinzengetsu [
i,': iYamachi 3-1112 name (,432)
D Hon Victor Co., Ltd. Representative Director and President Shishi,
I100-Part 4, Agent 5, L1 of amendment order Spontaneous amendment 6, Subject matter of amendment NY-Detailed explanation column 7, Contents of amendment (1) Particulars, page 20 81-1 [Remove 1 to Rack and J]. 12+ Same, 20th iQ 13th (i and same negative 15th (
Correct [IW] of j as l' T )) J. ■ Same, page 20, No. 16 (I of J, each 1 - rack 1 [
Correct it with MatJ each (・-knock).

Claims (1)

[Scope of Claims] (1) A rotary body on which an F41 recording medium is attached and wound in a fixed angle range, and a plurality of video signal recording rotary heads having mutually different azimuth angles and the video signal recording. A single rotary head for audio signal station recording having a different azimuth angle from the rotary head for recording a single audio signal station is used to obtain the first frequency-modulated audio signal from the audio signal every other track scanning period, and the other 1 from the audio signal every other track scanning period
A second frequency modulated audio signal delayed by a track scanning period is obtained, frequency division multiplexed in the same one track scanning period, and supplied to the audio signal recording rotary head every other track scanning period. Audio I in which the frequency division multiplexed first and second frequency modulated audio signals are recorded on the traveling magnetic recording medium by a signal recording rotary head.
- At the same time, a video track with a video signal recorded on the magnetic recording medium by the video signal recording rotary head is formed at 1 track pip, and the already recorded audio 1 - A multiplex recording method characterized by recording the video tracks overlappingly on a rack. ■ The video signal recorded by the video signal recording rotary head is composed of a frequency-modulated luminance signal and a frequency-modulated luminance signal. Which frequency division multiplexed signal is a low frequency conversion carrier chrominance signal that occupies an empty band on the lower side than the band of the modulated luminance signal? The multiplex recording method according to claim 1, characterized in that the signal is selected and recorded near the lower limit frequency of the signal. (3) The first frequency modulated sound 7ii is a 2-channel 7-channel stereo Two frequency-modulated audio signals of the audio signal (2'n frequency-modulated audio signals with different bands using the 7-channel audio signal as the largely modulated signal-T: Yes, gaa, the second frequency-modulated audio signal This patent is characterized in that there are two frequency modulated sound pj times signals that share the band with each other and make the audio signals of the two A7 channel stereo'A audio signals into modulated transmission signals. The multiplex recording method according to claim 1 or 2. (4) The azimuth angle of the blue signal recording rotary head is:
The azimuth angle of the video signal recording rotary head is 11.
The multiplex recording method according to any one of claims 1 to 3, characterized in that the multiplex recording method is selected as a multiplex recording method. 6) A rotary body in which a magnetic recording medium is wound with 00-C splicing in a certain angle range, and several rotary heads for recording and reproducing video signals with different azimuth angles and recording and reproducing the video signals. A single rotary head for recording and reproducing audio signals with a different azimuth angle from the rotary head is installed, and a first frequency modulated sound signal is obtained from the audio signal every other track scanning period, and the other one track scanning is performed. The audio signal of Myomon J3/F7J is delayed by a rack scanning period of 1 +! , ~ Obtain a second frequency modulated audio signal -C1 Frequency division multiplexing these signals in the same 11-rack scanning period and supplying the audio signal to the rotary head for recording and reproducing the audio signal every other track scanning period. The frequency division multiplexed first . The audio tracks 1 to 21 in which the second frequency modulated audio signal is recorded are formed at a rack pitch of 11-21, and the video track in which the video signal fi is recorded on the magnetic recording medium by the rotary head for recording and reproducing the video signal is formed in the rack pitch 11-21. Thick pitch formation (), and
The video track is superimposed and recorded on the audio track recorded in Vl, and during playback, the audio track and the video@1-rank are recorded in an overlapping manner. (The I
c from the reproduced signal. The second frequency modulated sound ρ-term signal is discriminately reproduced, and the first frequency modulated sound is selectively reproduced. A multi-recording/reproduction method characterized in that two demodulated sound FM signals are synthesized and extracted in a 114-sequence manner from the second frequency modulated high frequency transmission. (6) The video signal recorded and reproduced by the rotary head for recording and reproducing video signals is a frequency-modulated luminance signal that is subjected to low-frequency conversion that occupies an empty band on the lower side than the frequency-modulated luminance signal band. A frequency division multiplexed signal with a carrier chrominance signal is provided, the bands of the first and second frequency modulated audio signals are selected and recorded near the lower limit frequency of the frequency modulated brightness signal, and this is reproduced. A multiplex recording/reproduction method according to claim 5. (7> The first frequency modulated audio signal is a frequency modulated audio signal in which two channels are modulated and the audio signals of the two channels are respectively modulated signals, each having a different band. And, the second frequency modulated audio signal is transmitted through the two channels 17 of the 2f-channel stereo A@voice signal.
62. The multiplex recording and reproducing system according to claim 5 or 61, characterized in that there are two frequency modulated audio signals C having different bands, each of which is a modulated signal for the audio signal of the channel. (8) The azimuth angle of the rotary head for recording and reproducing audio signals is selected to be sufficiently larger than the azimuth angle of the rotary head for recording and reproducing video signals. A multiplex recording and reproducing method according to any one of the above.