JPS60121884A - Multiplexing and restoring device of plural signals - Google Patents

Abstract

PURPOSE:To multiplex and restore easily other signals to the periodical signal which includes the synchronizing signal by providing the signal processing circuit to be multiplexed and the signal restoring circuit. CONSTITUTION:A periodical signal which includes the synchronizing signal whose period is predetermined is supplied to a terminal 1. On the other hand, plural signals are supplied to signal processing circuits MSG1-MSGm to be multiplexed from a terminal 2. Outputs of respective processing circuits MSG1- MSGm are added to the periodical signal of the terminal 1. Thus, within the either or both of the first period which corresponds to the synchronizing signal in the periodical signal, and the second signal which corresponds to the period which is predetermined around the period, time-base compression and multiplexing are executed. Then, the multiplexed signal is restored in signal restoring circuits RSG1-RSGm. Thus, other signals are multiplexed and restored easily to the periodical signals which include the synchronizing signals.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention includes a synchronization signal having a predetermined period. This invention relates to a multiplexing and restoring device for multiple signals, which multiplexes at least one other signal No. 43 to a periodic signal that is being transmitted, and restores the original signal from the multiplexed signal as described above. be.

(Prior art and problems) Conventionally, television video signals (hereinafter referred to as television)
A rotating head type video player that has been widely used as one of the recorders for recording and reproducing (abbreviated as V).
In a tape one-coder (VTR), C is an audio signal,
Recording of control signals, cue signals, etc. is provided on section C6 of the magnetic tape in the following manner: Dedicated recording 1~
This is generally done using a rack.

By the way, in recent years, TV movies 4gH4Q J,,',
As recording density continues to increase, the running speed of magnetic tape continues to decline.For example, the running speed of magnetic tape is 1/sec (VTRs below 1/sec are cursed). However, as the running speed of the magnetic tape decreases,
Naturally, the deterioration of the audio signal became significant and became a problem.

Also, looking at the magnetic tape used in VTRs, the width of the magnetic tape in early broadcast VTRs was approximately 5 (2), but the width of the magnetic tape used in home VTRs was 11 is becoming narrower, from about 25 mm to 8 mm, and as a result, the ratio of the area of the audio track No. 48 to the area of the video (no. 6 track) is gradually increasing, and this point is due to miniaturization. This was an obstacle to higher density.

Furthermore, in V1'R, in which audio signals (-ranks, etc.) are separately provided as mentioned above, a dedicated magnetic head is required for each track, resulting in an increase in the number of parts and This resulted in a more complex configuration and caused problems in terms of cost.

A rotary head type VT having the general configuration as described above.
The problems in R can be effectively solved by creating a signal in which the TV video signal and the audio signal are multiplexed, and then recording and reproducing the signal.

Now, recording and transmitting a plurality of signals to be recorded and transmitted in the form of a multiplexed signal has been widely practiced for a long time. Conventionally, there are many signal multiplexing methods such as various signal multiplexing methods using frequency division multiplexing as the basic construction principle and various signal multiplexing methods using time division multiplexing as the planting principle. For example, an audio carrier wave having a frequency higher than the upper limit of the frequency band of the TV video signal to be recorded is modulated with an audio signal to create a TV video signal. For example, T
The TV signal and the audio signal are frequency modulated waves such that the V video signal and the audio signal occupy different frequency bands (the frequency modulated wave by the audio signal occupies a lower frequency band). Multiplexing methods that result in frequency division multiplexing have been in practical use.

However, in the former method among the above-mentioned multiplexing methods, the occupied frequency band of the recording signal is expanded, the recording wavelength of the audio carrier wave is shortened, and the S/N ratio is likely to deteriorate due to various losses. In the latter of the multiplexing methods described above, harmonic components due to distortion of the audio carrier wave may interfere with the 1 iF range of the TV video signal, and the color signal is multiplexed in the low frequency band. However, there were drawbacks such as a lack of flexibility in terms of reliability, and both of the above-mentioned (PI) systems also had the drawback of being unable to perform after-recording.

(Means for Solving the Problems) The present invention multiplexes at least one other signal to a periodic signal implanted including a synchronization signal having a predetermined period JυJ, and , a multiplexing and restoring device for multiple signals that restores a plurality of original signals from the multiplexed signals as described above, the periodicity comprising a synchronization signal having a predetermined period. The other signal to be multiplexed with the signal is N( 11
means for individually holding the N sampled value signals obtained by sampling using the N-phase sampling signals; and holding means for individually holding the N sampled value signals. Phase modulation of N/2 wave numbers such that the leading edge and the trailing edge are individually phase modulated by two each of the N retained sample value signals obtained by holding the N retained sample value signals. The signal has a first period corresponding to the same 311j signal period of one of every M synchronization signals in the periodic signal including the synchronization signal having the predetermined period as described above, and A multiplexing and restoring device for a plurality of signals, comprising means for making the signal exist within either one or both of the second period corresponding to a predetermined period near the first period. , as well as other signals to be multiplexed to the periodic signal, which is composed of a synchronization signal having a predetermined period, and sandwiching the synchronization signal having a predetermined period. means for sampling with an N-phase sampling signal having a period M times the period of the synchronization signal in the periodic signal;
means for individually holding the sample values (if number), and the above-mentioned N
The leading edge and the trailing edge are individually phase modulated by each of the N retained sample value signals obtained by retaining the N sample value signals by the retaining means. /2 wavenumber phase modulated signal in the synchronization signal period of one of every M synchronization signals in a periodic signal including the synchronization signal having a predetermined period as described above. A corresponding first period and a second period corresponding to a predetermined period near the first period, or means for causing the period to exist within both periods. a first period corresponding to the synchronization signal period of one of every M synchronization signals in the periodic signal configured to include the synchronization signal having the predetermined period in the multiplexed signal;
Phase modulation of N/2 wave numbers that is arranged to exist within one or both of the predetermined period near the first period and the second period corresponding to the second period. means for obtaining N restoration-preserving sample value signals based on information on respective leading and trailing edges of the signal; and means for obtaining N restoration-preserving sample value signals at a predetermined sampling period. means for obtaining N restored sample value signals by sampling with a sampling signal of , and from the N restored sample value signals,
multiplexing and restoring of a plurality of signals, comprising means for obtaining a restoring signal of another signal multiplexed with a periodic signal including a synchronizing signal having a predetermined cycle. It provides equipment.

(Example) Hereinafter, specific contents of the multiplexing and restoring device for multiple signals of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a method in which at least one other signal is multiplexed to a periodic signal including a synchronization signal having a predetermined period, and also from the multiplexed signal as described above. FIG. 2 is a block diagram showing an embodiment of the multiplexing and restoring device for multiple signals of the present invention for restoring a plurality of original bJ codes; The periodic signal being
The explanation is given using a video signal as an example.

In Fig. 1, 1 is an input terminal for a periodic signal including a synchronous signal (No. 8) having a predetermined period, and this input terminal 1 is connected to a TV video signal (including a color TV video signal). 2-1°2-2...2-rn in FIG.
These terminals are input terminals for a plurality of (M) other signals to be multiplexed with the TV video signal, and reference numeral 2 in the figure is the overall code for the other signal input terminals.

In the embodiment shown in the first figure, for the sake of simplicity, the number M of other signals to be multiplexed with the TV video signal is
is 3, and in the following example, the input terminals 2-1 .
The above three other signals supplied to input terminal 2-2 and input terminal 2-m are all audio signals, and furthermore, among the above three audio signals, input terminal 2-m
Although it has been explained that the audio signal supplied to -m is also used as a tracking reference signal, in implementing the present invention, it is configured to include a synchronization signal having a predetermined cycle. Of course, the number M of other signals to be multiplexed with respect to the periodic signal may be arbitrarily set.

Now, in Figure 1, the dashed-dotted line frames MSGI, MSG2,
...MSG The part indicated by m is a signal processing circuit for signals to be multiplexed, and the signal processing circuits for these signals to be multiplexed MSGI, MSG2...M
SGm is composed of 4 circuits having the same configuration, and the signal processing circuits MSGI, MSG2, etc. for the signals to be multiplexed are The number M is the same as the number M of other signals to be multiplexed with respect to the periodic signal including the synchronization signal.

In FIG. 1, one of the signal processing circuits MSGI, 1lsG2, . . . MSGm for the M signals to be multiplexed (multiple Signal processing circuit MSGrn for signals to be converted
), only the detailed configuration of C1 is illustrated, and the signal processing circuit MSG1 for other signals to be multiplexed is shown.
MSG2 is simply illustrated by a dashed-dotted line frame.

TV video signal supplied to input terminal 1 ((a) in Figure 2)
) is applied to the synchronous separation circuit SEP and the filter (branching filter) l)W. The synchronization separation circuit SEP separates the synchronization signal from the TV video signal (composite video signal -0) supplied thereto, and converts the horizontal synchronization signal ph ((b) in FIG. 2) into the first . A second pulse generator PCI, I) is applied to G2.

The first pulse generator PCI described above generates M sequences of pulses P h 1.
P h :l”・-P hm ((c) to (in Fig. 2)
e) Signal processing circuits MSGI, MSG2...'MS for generating the signals to be multiplexed
In the embodiment shown in the first diagram, M is 3 as described above, so the first pulse generator Gl supplies a pulse as shown in the second diagram. Three series of pulses are generated.

That is, in the first pulse generator PGI, the number of other signals to be multiplexed with respect to the periodic signal is M, and the number of synchronization signals in the periodic signal to be multiplexed with the other signals described above is M. Let T be the period of M, which has a period MT and is synchronized with the synchronizing signal
It is necessary to be able to generate a series of pulses, fL'C. and the above-mentioned first pulse generator PG1
can be configured using, for example, a frequency divider.

Furthermore, in the second pulse generator 1)G2, the first
(c) to (() of FIG. 2 generated by the pulse generator PGI of
M-sequence pulses P1]1 to P as shown in e)
The general sampling pulses Pl+1 .h m are shown in (f) to (kr) of FIG. Generating sl~I''hms4.

GV signal processing circuits MSGI, MSG2, MSGm to multiplex those sampling pulses
(a) Offer each item to the designated items.

(f) in FIG. 2 is the N-phase sampling pulse P hlsl to P hls4 corresponding to the pulse P l+ 1 of the pulse train shown in FIG. 2 (c), and ( g) is the N-phase sampling pulse 1+2s1. which corresponds to the pulse train (Z) shown in FIG. 2(d). "Ph2.s4, and (h) in FIG. 2 is the sampling pulse of the N phase corresponding to the pulse -Phm of the pulse train shown in (e) of FIG. 2, that is, the sampling pulse P
hm5l.~Phms4. In the embodiment shown in FIG. 1, the circuit arrangement is shown when the above-mentioned increment 1 is 4, but the 10. , each of which is a four-phase sampling pulse, but the value of N mentioned above is based on the frequency J (JJ), which is composed of a synchronization signal with a predetermined cycle Il, the number M of other signals to be used, and the periodicity described above (γ for No. 0).

It should be selected appropriately depending on the frequency qIV region II required by other signals to be superimposed.

In the circuit arrangement shown in the first diagram, the second pulse generator P [
;N-phase sampling pulse Ph1s generated from 2
1 to Ph1q4 are sent to the signal processing circuit MSGI of No. 45 to be multiplexed, and are also sent to the second pulse generator PG.
N-phase sampling pulse Ph2sl generated from 2
~Ph2s4 is a signal processing circuit M for signals to be multiplexed
S G 2 and further a second pulse generator P
N-phase sampling pulse Pbm5 generated from G2
l to Phnts4 are given to the signal processing circuit MSG+n of the signals to be multiplexed, and then the periodicity 41
This signal is used for sampling operations such as sampling of other signals to be multiplexed to the - signal.

Now, the first . If the TV video signal is a color composite video signal, a filter (branching filter) D (
At 11, the luminance signal Y and the carrier color C are exceeded.

The intensity signal Y is applied to the adder circuit AD+), and the carrier color signal C is applied to the color 1g processing circuit y3. cot, given to. If the Jt and 4Q signals supplied to the input terminal P1 are composite 1'V signals with only a luminance of 45, filter IJll and color signal processing 1 (route C (JL, etc.) are unnecessary. Needless to say, it is.

In the color signal processing circuit C01, the carrier color No. 4i3 supplied to it is, for example, low war change 11! ! +pit It is converted into a color sending signal and given to the old circuit for use. Addition circuit Al) written as if! ], signal processing circuits MSGI and MS for signals to be multiplexed perform signal processing operations as described below.
No. 43 created in step 2 is the period corresponding to the period of the horizontal synchronization m in the luminance equal signal Y, or the synchronization (
Frequency modulator MOD uses a signal added in a period corresponding to a predetermined period near No. g or a period corresponding to the above-mentioned rainy period (horizontal blanking period) as a signal wave. give to

In the frequency modulator MUD, after applying a predetermined pre-emphasis to the i-th wave given to it from the adder circuit ADD, the carrier wave is frequency-modulated and a frequency-modulated wave output is given to the superimposition circuit MIX.

The superimposition circuit MIX combines the frequency modulated wave output from the frequency modulator MOD and the color signal processing circuit CO.
The output signal from L and the output signal of the signal processing circuit MSG m of the signal to be multiplexed are superimposed with each signal such as the signal extracted by the circuit Gm to the circuit Gm, and the superposed signal is applied to the output amplifier RA.

The output amplifier RA outputs to the output terminal 3 a multiplexed signal in which at least one other signal is multiplexed to a periodic signal including a synchronization signal having a predetermined period. Send.

The multiplexed signal output from the output terminal 3 is supplied to a multiplexed signal restoration device via the recording and transmission system TR.

Next, the other signals supplied to the input terminals 2-1 to 2-m are the signals to be multiplexed by the signal processing circuit MSGI.

MSG2... MSG m The signal processing circuit MSG for the signals to be multiplexed is shown surrounded by a dashed-dotted line frame MSGII+ in FIG. m will be used as a representative example, and will be explained in detail with reference to explanatory waveform diagrams shown in FIGS. 3 to 5.

In Figure 1, m supplied to input terminal 2-m!
fst is one of the other 18 signals that should be multiplexed with the TV video signal, but in the example below, the signal St
It is said that St is an audio signal which is also used as a tracking reference signal, and the waveform of the signal St described above is shown in FIG. 3(e).

The signal St supplied to the input terminal 2m to the signal processing circuit MSGm for signals to be multiplexed is processed by the process amplifier P.
In the CA, the signal is limited and amplified to a level suitable for subsequent modulation, and after being subjected to appropriate pre-emphasis processing, it is applied to a low-pass filter (LPF). The low-pass filter LPF limits the signal St to a frequency band of 1/2 or more of the sampling frequency to prevent aliasing distortion from occurring in the next stage of sampling processing.

The output signal from the low-pass filter LPF is given to sampling circuits (samplers) SGI to SG4. The signals given to the samplers SGI to SG4 are the sampling pulses (sampling signals) P hmsl to P 1111154 (
Sampling is performed according to FIGS. 3(a) to (d)).

Each sampler 5GI-5G4 outputs a sample value signal. The signal S shown in (,) in Figure 3
The circled part at t is the sampling pulse Phm5
This is the part sampled by l~P hms4.

Each sample value signal output from each sampler 5GI-5G4 is processed by hold capacitors 01 to C4 individually provided for each sampler SGI to SG4 for one sampling period (in the illustrated embodiment when M is 3). In this case, it is held for three horizontal scanning periods (3H) in the TV video signal.

Figure 3 (f,) to (i) show each hold capacitor 01-
- Each held sample value signal Vc1.C4 held by Vc1. .

Vc2. Vc3. This is a waveform collapse of Vc4. Each of the held sample value signals Vcl to Vc4 is applied to one of the adders ADDI to AD IJ4, which are individually provided for each of the hold capacitors 01 to C4. The adders A and DD1 to ADD4 described above are each supplied with a predetermined DC voltage Vl-V/l generated by the DC voltage generation circuit 11CV. A predetermined DC voltage Vl
In the following description, ~V4 is a voltage value obtained by dividing the reference DC 1-4≧pressure Vs into five equal parts using a resistor network.

As mentioned above, from the DC voltage generation circuit DCV to the adder A
I) I) ] ~ Although it is not a necessary condition for implementing the present invention that the DC voltage applied to the ADD4 is in a state that equally divides the reference DC voltage Vs, it is necessary for DC voltage generation. From circuit DCV to adder AI) DI to ADD4
Phase modulation, which will be described later, can be performed most efficiently if the DC voltage applied to the reference DC voltage Vs is divided into equal parts. Setting method 4 is preferable.

Then, on the output side of the adder ADDI described above, a signal Vcl' in which the held sample value signal Vcl is superimposed on the DC voltage v1 appears.
On the output side of DD2, there is a sample value held at DC voltage v2.
A signal Vc2' on which the signal Vc2 is superimposed appears, and furthermore, a DC voltage V3 appears on the output side of the adder ADD3.
. . . The signal Vc in which the stored sample value signal C3 is superimposed on
3' appears, and again, in the addition mentioned above: A
On the output side of D D 4, a signal Vc4' in which the held sample value signal Vcl is superimposed on the DC voltage V4 appears.

Adder ADD] ~ A
OM■)]~CO is given as a comparison voltage to the liver 4, and each of the above-mentioned comparators COMPI-COMP4 is supplied with @ generated by the sawtooth wave generator SAW as a reference voltage.
Tooth wave voltage is not supplied.

The sawtooth wave voltage generated by the sawtooth wave voltage generator SA/W has a first period corresponding to the synchronization signal period of one of the M synchronization signals described above, and a first period corresponding to the synchronization signal period of one of the M synchronization signals described above. Either one or both of the second period corresponding to a predetermined period near the period, for example, if the periodic signal is a TV video signal, the horizontal synchronization signal in the TV video signal , or a period corresponding to a defined period near the period of the horizontal sync signal (e.g., the back porch portion), or both of the above periods (horizontal blanking period). It is said to have a waveform that shows the following.

In the illustrated example, the sawtooth voltage generated by the sawtooth voltage generator 5All includes a synchronization signal having a predetermined period, that is, the period of the horizontal synchronization signal of the composite TV video signal. This shows a case where the periodic signal reaches a specific voltage value with a constant slope during the period of the synchronization signal, and the fourth
The period indicated in parentheses (,) in the figure is T.
This is the period of the horizontal synchronizing signal of the V video signal, and the period in which 3H is displayed is the 3 horizontal scanning period, but if expressed generally, 5 μ in (a) of FIG.
The part indicated as s is the period of the synchronization signal in the criminal signal on which other signals are to be multiplexed, and
In (a) of Figure 4, the part marked as 3 days is
Other signals are multiplexed with J+, which shows a period of periodicity (M times the picture return period of issue i).

FIG. 4(b) shows it' from the sawtooth wave generator SAW.
The sawtooth wave voltage Vsaw that is applied to the comparators cOMP1 to CO14 as a 7jlH voltage, that is, in the example shown in the figure, is set so that it reaches a specific voltage Vs with a constant slope during the period of the horizontal synchronization signal of the TV video signal. and the sawtooth wave voltage Vsaw formed in each adder ADL)1 to ADD.
4 to each comparator.

V c2'', V c3', and V c4' are shown in the figure, and the signals on the input side of each of the comparators COMPI to COMP4 and the comparison operation of each of the comparators CO1 to COMP4 are used to determine whether each comparator is 4 is a diagram in which the correspondence relationship with signals 81 to S4 as shown in FIG. 4 (c) to (f) appearing on the output side of COMPI to COMP4 can be easily understood.

The output signal 81 of the comparator COMPI~CO liver 4~
The level state of S4 is set to high level when the comparison voltages Vcl' to Vc4' applied to the comparators CO1 to COMP4 are lower than the sawtooth wave voltage Vsaw.
Further, the comparison voltages V c 1 ′ to V c 4 ′ given to the comparators COMPI to CO liver 4 are the sawtooth wave voltage V
If it is higher than saw, it is set to low level, so for example, the comparison voltages Vcl' to Vc4' given to the comparators COMPI to C0MlI4 are as shown in FIG. 4(b). As in a certain example, voltages Vl, V2 . V
3. V/l, each comparator COHP 1~
Each output signal SL, S2 appearing on the output side of COM[+4
．． S3. S4 is as shown in (e) to (f) of FIG. 4, respectively.

Then, as described above, each comparator COMPI to COMP4
The respective output signals Sl, S2 . S3. S
The time position of the leading edge of 4 is determined by each comparator COMPI~COMP.
The comparison voltages Vc1' to Vc4' given to 4 are higher and lower than each of the voltages 1 to 4 described above, and the comparison voltages Vc1' to Vc4' applied to the voltages Vc1' to Vc4' move back and forth on the time axis as indicated by arrows X in the figure. , that is, each output signal SL appearing at the output side of each comparator COMPI to COMP4, 32. S3,84 is
The leading edge is phase-modulated as indicated by the arrow X in the figure, depending on the magnitude of the comparison voltages Vcl'' to Vc4' applied to the respective comparators COMP1 to COMP4.

Therefore, each of the output signals Sl, S2 . S3. S4
If we shape the pulse obtained by differentiating the leading edge of , we get (
g) Pulse position modulated wave (PPM wave) P as shown in
si~ps4 will be obtained.

The pulse position modulated wave (PP
M wave) Psi to Ps4 is a time of 5 μs +
Each pulse Psi~ is placed at a time position that divides 1J into 5 equal parts.
Since Ps4 exists, its period is lμS (pulse repetition period is IMHz).

Now, the pulse position modulated waves (PPM waves) P sl to P s4 shown in (g) of FIG. 4 are the (e,
) of the signal St as shown in 3 horizontal scanning periods (3
11 period (approximately 190 μs), four sample values sampled at intervals of 3H/4 are stored in the time IJ of 5 μs.
The time axis is compressed by 4t within the period of .

As is clear from the above description, in the device of the present invention, the number of other signals to be multiplexed with respect to one period of the outgoing signal is M.
Also, when the period of the synchronization signal in the periodic signal on which the other signals mentioned above are to be multiplexed is T, then MT
The N sample values extracted from the aforementioned other signals during the time denoted by The time axis is compressed as being located within one or both of a predetermined period near the first period and a second period corresponding to the second period. N sample values extracted from the other signals mentioned above during the time represented by MT mentioned above.

The state exists within a first period corresponding to the synchronization signal period of one of the M synchronization signals, or corresponds to a predetermined period near the first period. or the state that exists within the second period, or the first period described above. It is possible to cause the state existing within the second two periods to flow from the sawtooth wave generator 5AII' to the comparators COMPI to COMP.
This can be easily realized by appropriately setting the existence range of the sawtooth wave voltage Vsaw supplied to the circuit 4 and the degree of slope of the sawtooth wave voltage on the time axis.

Each of the M other signals also corresponds to a defined period within or in the vicinity of a particular synchronization signal period, as described above. Of course, time axis compression may be performed assuming that the time period is within the above-mentioned period, or within both of the above-mentioned periods.

By the way, the pulse position modulated waves (PPM waves) Psi to Ps4 shown in FIG. Depending on the recording medium, it cannot be transmitted and recorded.

Therefore, in the device of the present invention, each of the comparators COMP1 to
Each output signal S appearing on the output side of COMP4 1. S
2゜S3. Based on S4, leading edge (rising) and trailing edge (
N/2 rectangular wave-like phase modulated signals each receiving different phase modulation and having approximately symmetry, and which are synchronized every M as described above. within one or both of the first period corresponding to the synchronization signal period of one of the signals and the second period corresponding to a predetermined period near the first period. We are trying to make it become something that exists.

In this way, in the above example, the basic repetition frequency becomes ]/2, 500 KHz, making it easy to transmit a narrow frequency band and to record the transmission using a recording medium.

In addition, in the case of a rectangular wave, the wave height value of the fundamental wave component is 1.4 times the wave height value of the rectangular wave, so there is little drop in the wave height value due to the frequency characteristics of the transmission path, and There is an advantage that the roundness of the waveform at the edge can be easily recovered using a limiter or the like.

In the embodiment shown in the first diagram, each of the above-mentioned comparators COM
Each output signal SL appearing on the output side of PI to COMP4,
S2. S3. S 4 N/2 rectangular wave-like phases in which the front a (standing) and the transition (falling) are each subjected to different phase modulation and have approximately symmetry. The modulated signal is synchronized every M (a first period corresponding to the synchronization signal period of one of the ff signals, and a second period corresponding to a predetermined period near the first period described above).
The circuit arrangement for making the inverter exist within either one or both of the periods is as follows:
V1, iN~12, NAND circuits Nl, N2, and a negative logic OR circuit OR are used, and according to the circuit arrangement described above, each comparator COM
(C0141) in Figure 4 appearing on the output side of
) to (1), each output signal S L,
S2. S 3. Based on the information of each leading edge of S4, when the leading edge (rising) and the trailing H1 (falling) are respectively receiving different phase modulations, (h) in FIG.
Two (N72) phase modulated signals P as shown in
pml, P p m2 can be created and output.

Further, the phase modulated signals P pml, P p
m2 is a circuit other than the above-described circuit arrangement shown in FIG. 1, for example, the above-mentioned phase modulated signal Ppml.

Pprn2 can also be easily formed by a circuit arrangement constructed using a plurality of bistable multivibrators.

The two phase modulated signals Ppml and Pprn2 mentioned above are given to the circuits G1 to Gm, which are supplied with the pulse Pt++++ as a gate pulse from the first pulse generator PCI, and are outputted from the gate circuit Gm. The resulting signal is passed through the AC coupling means AC to remove the DC component in the signal, resulting in a signal Ppml', Pp as shown in FIG. 4(i).
It is supplied to the superimposition circuit MIX as m2'.

Input terminal 2 of signal processing circuit MSGm for signals to be multiplexed
−1~ which is also used by the audio signal given to m
The racking reference number St is signal-processed in the signal processing circuit MS button of the signal to be multiplexed as described above, and in the illustrated example, as mentioned above, the TV video signal is horizontally compressed in the time axis. The superimposing circuit MIX superimposes the signal located in the period corresponding to the synchronizing signal period in the period corresponding to the horizontal synchronizing signal period every three horizontal scanning periods of the TV video signal.

The audio signals that are individually input to the input terminals 2-1, 2-2 of other signals and supplied to the signal processing circuits MSGI and MSG2 for the signals to be multiplexed are also connected to the signal processing circuit G for the signals to be multiplexed. In the signal processing circuit MSG2 for the signals to be multiplexed, the signals to be multiplexed are subjected to the same signal processing as that received by the audio signal St in the Q processing circuit MSGm, and are subjected to time axis compression. in a period corresponding to the horizontal synchronization signal period of the TV video signal, or within a period corresponding to a predetermined period near the synchronization signal, or within both of the above periods (horizontal blanking period). (It is supplied to the adder circuit ADD as No. 1.

(a) in FIG. 5 shows the waveform of the output signal from the adder circuit ADI), and (I) in FIG.
Output signal Ppl from signal processing circuit MSG l for signals to be multiplexed and signal processing circuit MSG for signals to be multiplexed
Furthermore, (c) in FIG. 5 shows the signal processing circuit MSG+ of the signal to be multiplexed.
Signals P pm1' and P pm2' with DC components removed from output signals P p'nil and Ppm2 from n.
(In the figure, it is indicated as l) p m '.) This shows the waveform collapse.

(signal is horizontal open J41) as shown in Figure 5 (a).
(For the back porch part of No. i'j Ph, the signals p p 1 , r' p as shown in the fifth part (b)
2. In other words, No. 3 processing circuit H for signals to be multiplexed
Output signal P from 5GI P p 1 to be octupled, p a's in % Logical circuit i・i S C+ 2h1's output signal P l) 2 is added f;'
EI I' represents the signal "C", but in this Figure 5 (
As illustrated in a), the signal 1) pi, )
) If p2 is out of alignment with the horizontal synchronization, the signal 1), +1. I)
When p2 is added to the horizontal synchronization signal, the following advantages are obtained: (1) There is no disturbance of the screen due to disturbance of the horizontal synchronization that may occur on the raw screen.

It should be noted that the signal Ppm' shown in FIG. , is located in a period corresponding to the period of the horizontal synchronizing signal Ph in the signal shown in FIG. After the signal shown in FIG.
Since the signal Ib added by IX is used as a tracking control signal, the signal S3. r,) pmr
The presence of the signal does not cause disturbance in the horizontal synchronization of the signal shown in FIG. 5(a).

FIG. 6 shows that the output signals sent from the output terminal 3, that is, the three types of signals shown in (b) and (c) of FIG. The output signal in the form of a signal arranged as shown in FIG.
For example, this is an explanatory diagram of a recording trace pattern on a rotating recording medium when recording is made on a rotating recording medium and the signal shown in (c) of FIG. In the figure, IH represents one horizontal scanning period, TP represents one trace interval, and ppt
, pp2°P p m ', etc. indicate the position of each horizontal synchronizing signal period in which one type of each of the three types of signals explained with reference to FIG. 5 is multiplexed.

As mentioned above, when the tracking reference signal is recorded on the recording medium, the recording traces formed adjacent to each other on the recording medium are as shown in FIG. As in the record trace pattern, the horizontal synchronizing signal periods in each record are aligned in the direction perpendicular to the extension direction of the record, and adjacent records do not have signals of the same type. It is necessary to form a record on a recording medium in such a manner as to record the pattern, but in order to record and form the above-mentioned trace pattern on the recording medium, it is necessary to This can be easily achieved by appropriately determining the number of revolutions of the recording medium. Ic
All you need to do is determine the number of rotations for the jc body.)

Now, record@medium L having the record trace pattern shown in FIG.
) is output from the output terminal 3 of the multiplexer for multiplexed signals as shown in Fig. The signal P p m ' created based on the output signal of The day of crosstalk is -20d B
Contrary to the fact that the signal processing circuit of the signal to be multiplexed is relatively large, the output signal Ppl, l-'p2 of the signal to be multiplexed is Since it exists as a modulated wave during the back porch period of the horizontal synchronization signal of the TV video signal, the amount of crosstalk of this signal to the adjacent recording trace is approximately -4
Therefore, by comparing the amount of the above-mentioned signal F' p m ' which is small as 0(III or less), it is possible to detect This allows the tracking control operation to be performed satisfactorily (the tracking reference signal described above).
Although the signals have the same frequency, the 1-racking reference signal in each recording trace is shifted by IH, as is clear from the trace pattern in Figure 6, so it is reproduced from the trace currently being traced. Signal 1 with good signal level? pm
' is used as a time or position reference signal, and the signals P p m ' of the recording traces on both sides of the recording trace currently being traced are obtained.
By extracting this and using it as the tracking reference number 4n, the I-racking control operation by the automatic control system for 1 to racking can be performed well and generalized).

In addition, the horizontal retrace line of the TV video signal) 11 is multiplexed so that it is located at a predetermined Gi 1 minute within the previous period.
Among the type No. 46, that is, the No. 46 PplI+', the frequency modulated wave by the signal Ppj, and the frequency modulated wave by the signal Pp2, the signal Ppm' and the other two types of signals p
pl, 1) Since the frequency modulated waves in p2 and the frequency modulation waves in p2 are different from each other, they do not affect each other. 'j can be made to coexist independently as being in a state unrelated to TL.

However, if the input of the recording signal P p m ', which is directly recorded as the state of the phase modulated signal, is too high, it will interfere with the frequency modulated wave (i-th component) of that part, and the reproduced TV ff1. Since it degrades the S/N of the corresponding signal portion in the signal (corresponding signal portion within the horizontal blanking period), the signal level of the signal “iJPpm” described above must be set appropriately. be done.

In addition, as will be described later, the waveform shaping of the horizontal synchronization signal is performed as necessary in the playback system, so that the presence of the multiplexed signal in the horizontal synchronization signal part can be avoided in the reproduction of the TV video (No. It is desirable to take care to ensure that there are no negative effects.

The multiplexed signal formed as described above, that is, the synchronization signal portion of a periodic signal including a synchronization signal having a predetermined period, is time-base compressed and multiplexed with other signals. For multiplexed signals, use an appropriate transmission path]
R1 or a suitable recording medium TR (a part or all of the signal is made into a frequency modulated wave, for example, so that the multiplexed signal is in a signal form convenient for recording transmission by the recording transmission system). For example, in the embodiment described above, the periodicity kj to be multiplexed with other signals is assumed to be 1" video signal and 1"l/
11.7 in a specific part within the horizontal blanking period of the video signal.
Two signals Ppl are multiplexed in a compressed state.
.

I] ρ2 etc. are in the signal form of frequency modulated waves.

However, in the description of the specification, part or all of the signal is J'; The modulated wave (,
Regarding a multiplexed signal that is recorded and transmitted in the 4t form, it is considered that ``a synchronization signal in a periodic signal that is composed of a synchronization signal having a predetermined period of nine times'' is also considered. a first period corresponding to the above-mentioned first period and a second period corresponding to the predetermined period near the first period; The other signals are expressed in a multiplex expression method in which the other signals are compressed and multiplied by Φ11 between 11!f.

Next, the synchronization in the periodic signal including the synchronization Ir3 having a predetermined period as described above (the first period corresponding to the interval IUj and the first period described above) is performed. The original signal is extracted from a multiplexed signal in which other signals are time-base compression multiplexed within one or both of the periods and a second period corresponding to a predetermined period near the period. An apparatus for restoring a signal to be restored will be explained with reference to FIG.

multiplexed signal recorded and transmitted by the recording and transmission system TR;
That is, a first period corresponding to a synchronization signal period in a periodic signal including a synchronization signal having a predetermined cycle, and a predetermined period near the first period described above. When a multiplexed signal in which another signal is time-base compression multiplexed within one or both of the second period and the second period is input to input terminal 1 of the signal restoration device, the multiplexed signal is input to input terminal 1 of the signal restoration device. After the signal is amplified by the preamplifier PrA, it is passed through the FM demodulator DEEM and the low-pass filter (
low pass filter) LPFr.

The FM demodulator OEM performs FM demodulation and sends the demodulated signal to the synchronization separation circuit 5EPr and the circuits Gr1 to Gr1.
, G r2 and the synchronizing signal shaping circuit SSP. In addition, in the low-pass filter LPFr described above, the preamplifier P
Low-frequency signal component in rA output/signal, e.g. 1
Extract the low frequency conversion carrier color signal, signal Pρm', etc. that exists in the frequency band below A and send it to the amplitude demodulator D.
ET, color signal processing circuit C0Lr, and gate circuit G
el and Ge2.

The color signal processing circuit C0Lr converts the low-pass conversion carrier color signal into a standard carrier color signal so that the output signal therefrom is used for reproducing the standard color composite video signal, and gate circuit Gel,G
e2 is a circuit for extracting and giving a predetermined I/racking reference signal crosstalked from recording traces on both sides to the tracking control circuit TSC; In the 'SC, a 1-racking control signal is generated based on the magnitude of the tracking reference signal crosstalked from the recording traces on both sides, which is supplied by the above-mentioned gate circuits Gel and Ge2. - Allow racking to be controlled. 1@ with the same frequency but different phase as the tracking reference signal
Tracking control methods that use a number of methods are known, so a detailed explanation thereof will be omitted.

The horizontal synchronization signal separated from the TV video signal by the synchronization separation circuit 5EPr is sent to an amplitude demodulator DET, first and second pulse generators PG1r, PG2r, and a synchronization signal shaping circuit SS.
It is supplied to P. The amplitude demodulator DET, which is supplied with the output signal of the low-pass filter LPFr, extracts and detects the signal Ppm' present in a specific part of the horizontal blanking period (in the illustrated example, the horizontal synchronizing signal period). , output pulse P
p m ' to the first pulse generator PG1r.

The above-mentioned first pulse generator PGI t is supplied with the horizontal synchronization signal from the synchronization pre-circuit SEP r and the output pulse Ppm'' from the amplitude demodulator DET. Based on the time position of the pulse P pm', an M-sequence pulse Ph1r corresponding to the M-series pulses Phi to Ph m shown in (c) to (e) of FIG. 2, respectively; Ph2r...
...Generates Phmr.

Further, in the second pulse generator PG2r described above, the second
N-phase sampling pulses Ph1sl'' Ph1s4, Ph as shown in (f) to (h) in the figure, respectively.
2sl-Ph2s4, PhmsL~Phms4 N-phase sampling pulses Ph1slr~Ph1s/lr, Pb2slr"Ph2
Generates s4r, Phmslr-Ph2s4r.

R5GI to R5, which are indicated by the dashed-dotted line frame in FIG.
Gm is a first period corresponding to a synchronizing signal period in a periodic signal including a synchronizing signal having a predetermined period, and a predetermined period of 1t near the first period described above. This is a signal restoration circuit used to restore a signal that has been multiplexed in a time-axis compressed state within one or both of the corresponding second periods. Several signal restoration circuits R5GI
~R3G+n, all of them have the same configuration, so in order to avoid the complexity of drawing description, one of the signal restoration circuits R5Gm is shown in FIG. We are limited to clarifying its specific configuration.

The signal restoration circuit R5GI performs one of the following periods: a first period corresponding to the horizontal synchronization signal period of the TV video signal, and a second period corresponding to a predetermined period near the first period. Or restore the phase modulated signal l]pi in the fifth step (a), which is multiplexed in a time-axis compressed state within both periods (within the horizontal blanking period), to the original signal. This signal restoration circuit R5GI
A phase modulated signal Ppl is applied to the gate circuit i1'30r1 which performs a gate operation using the pulse Ph1r supplied from the first pulse generator PGlr as a gate pulse.

In addition, the fa number restoration circuit R3G2 performs a 1'V video i'l
Y) (7) I'i[J] between JIJi corresponding to the horizontal synchronization signal and a second period corresponding to a predetermined period near the first period. The phase modulated signal Pp2 in (a) of Fig. This signal restoration circuit R3G2 receives the pulse P b 2 supplied from the first pulse generator PGlr.
A phase modulated signal Pp2 is applied via a gate circuit Gr2 which performs a gate operation using r as a goo-1 pulse.

Further, the signal restoration circuit R5Gm is configured to select one of a first period corresponding to the horizontal synchronization signal of the TV video signal and a second period corresponding to a predetermined period in the vicinity of the first period. The fifth signal is multiplexed in a time-axis compressed state within the period or both periods (within the horizontal blanking period).
This is a signal restoration circuit that restores the phase modulated signal P pm' shown in (c) of the figure to the original signal, and this signal restoration circuit RS
Gm is given phase modulation (ii to fPpm') through KGrm which performs a gate operation using the pulse Pbrnr supplied from the first pulse generator PGlr as a gate pulse.

Next, the specific configuration and operation of the signal restoration circuits R5GI to R5Gm described above will be explained using the signal restoration circuit R5Gn+ whose detailed configuration is shown in FIG. 1 as a representative example. Phase modulated signal P p via gate circuit Grm
In the signal restoring circuit R5Grn to which m' is supplied, the amplitude fluctuation of the phase modulated signal P par' is converted to a limiter L.
Then, the output signal of the limiter LT described above is generated by applying the pulse Phmr supplied from the first pulse generator PG1r as a gate pulse.
- Provided to the gate circuit GTm that performs the operation.

From the gate circuit GTra described above, the phase modulated signal P pm' (2 of P pn+1' and P pm2') shown in FIG. 5 (c) and FIG. A phase modulated signal P pm' as shown in FIG. As described above, the modulated signal P pm' is composed of each pulse P pm
The leading and trailing edges of P and P pm2' are each phase-modulated by different retained sample values No. 46.

The above-mentioned phase modulated signals P pml' , Ppm2'
The pulse generating circuit PSG to which is supplied differentially shapes the one-phase modulated signals P pml' and F'pm2',
As shown in (c) to (f) of FIG. 7, the phase modulated signal Ppm1. '.

Pulses P5lr-Ps4r corresponding to ft are generated at the leading edge and trailing edge of Ppm2', respectively, and are given as sampling pulses to the samplers SPI to SP4.

The samplers SPl to SP4 include sawtooth wave generators 5AWr.
The sawtooth wave voltage Vs as shown in Fig. 7(g) generated at
aw is supplied, but the above-mentioned sawtooth wave generator 5A
Ii! The sawtooth wave voltage generated at reaches a specific voltage Vs with a constant slope within one or both periods. Note that (h) in FIG. 7 is a horizontal synchronizing signal.

Therefore, each sampler SPI~SP4 outputs the sawtooth wave voltage value at the time position of each sampling pulse as a respective sample value, and the voltage of each sample value is individually sent to each sampler SPI~SP4. A hold capacitor C1r provided in the.

It is held by C2r, C3r, and C4r.

As described above, each hold capacitor C1r to C4r
Each of the voltage values held in
It changes due to moving back and forth on the time axis, and each of the voltage values mentioned above includes each specific DC voltage given from the rIl current voltage setting circuit DCVr during multiplexing (No. 1). 1 to ■4 are superimposed.

Therefore, when restoring the multiplexed signal, the voltages held by the hold capacitors C1r to C4r are converted to the specific DC voltages (1 to 4) added during signal multiplexing. In the circuit layout shown in the first diagram, each hold capacitor C1, r'' C4r requires subtraction of the specific voltages 1 to V4 from the output voltage of each hold capacitor C4r. The output voltage of capacitor C1t・~C4r is subtracted by subtractor 5UEII~
This is done by asking S U H4.

In FIG. 1, DCV r is a DC voltage setting circuit, and in this DC voltage setting circuit DCV l, the reference voltage Vs is divided into five equal parts (N+1 equal parts) using a resistor network, resulting in voltages Vl, V2 . V3. V4 is generated, and each of the above-mentioned voltages is supplied to predetermined subtracters 5UBI to 5UB4, respectively.

So, in the subtracter 5UBI, the hold capacitor 01r
The DC voltage ■1 generated by the DC voltage setting circuit DCV r is subtracted from the terminal voltage of , and a restoration holding sample value signal as shown in (f) of FIG. Vclr is output, and the subtracter 5OB2 subtracts the DC voltage V2 generated by the DC voltage setting circuit DCVr from the terminal voltage of the hold capacitor C2r.
A restored holding sample value signal vC2r as shown in FIG. 8(g) is outputted to the output side of the subtracter 5UBI, and a hold capacitor C3r
The DC voltage ■3 generated by the DC voltage setting circuit DCV r is subtracted from the terminal voltage of , and the restoration holding sample value signal ■ shown in FIG. Furthermore, the subtracter 5UB4 subtracts the DC voltage ■4 generated by the DC voltage setting circuit DCVr from the terminal voltage of the hold capacitor 04r, and the output side of the subtracter 5UB4 is given as shown in FIG. A restoration holding sample value signal Vc4r as shown in (1) is generated.

The restored sample value signals Vclr to Vc1. as shown in (f) to (i) of FIG. t corresponds to each held sample value signal Vcl=Vc4 shown in (f) to (i) of FIG. 3 described above.

Then, each of the distorted restoration holding sample value signals outputted from each of the subtractors 5UIIL to 5UB4 described above is
Sampler SGJ r.
~JL given to SG4 r. Each sampler SGI mentioned above
r -5G4r is a sampling signal (sampling pulse) P ) + msl as shown in (b) to (e) of FIG. 8 generated by the second pulse generator PC2r
r-January 111184T, each of the nine specified samplers SGI r"S
Low-pass filter L P F connected to the output side of G4 r
A signal having a waveform as shown in (j) of FIG. 8 is outputted to the terminal o.

The signal shown in (k) of FIG.
This is the output signal of Fo, which corresponds to the signal restored by the device of the invention, i.e., the original signal St as shown in FIG. 3(e) supplied to the input terminal 2-m. It is something.

The output signal from the low-pass filter LPFo is sent to the output terminal 7 via the process amplifier PCA r. The process amplifier PCj1r described above performs de-emphasis on the signal and compensation for the omission of No. 48 in correspondence with the pre-emphasis performed when multiplexing the signal.

The explanation so far has been about the configuration and operation of the signal restoration circuit R5Gm, but other signal restoration circuits R5G1. R
The configuration and operation of the 5G2 signal restoration circuit R3 is the same as that of the signal restoration circuit R3 described above, and (ij restoration circuit RSGI, R5G
The output terminals 5 and 6 of 2-1.2 have input terminals 2-1. ．． 2-2
The manually inputted audio signals and the corresponding restoration signals are output. Further, a shaped synchronization signal is outputted to the output terminal 8 in the figure.

The embodiment device described so far is configured to include a synchronization signal having a predetermined period.The periodic signal is a TV video signal, and the horizontal synchronization signal of the TV video signal A first period corresponding to the aforementioned first period and a second period corresponding to a predetermined period near the first period are multiplexed in a state in which the time axis is compressed within one period or both periods. Three audio signals (in the embodiment, one of the three audio signals is also used as a tracking reference signal), that is, three low frequency signals, are used as the signals to be converted. A specific period in sequence in the TV video signal (either a first period corresponding to the horizontal synchronization signal or a second period corresponding to a predetermined period near the first period) or both periods (horizontal blanking period)), the above-mentioned three signals are allocated in a fixed repeating order, and the time-axis compressed signal is transmitted to the TV.
This is an example of a case where the video signal is multiplexed. In the example already mentioned, the two audio signals are time-base compressed together with the TV video signal, and the frequency modulation is iz. - The audio signal that is also used as racking reference No. 40 is multiplexed in a period corresponding to the period of a predetermined horizontal synchronization signal of the TV video signal as a signal in a time-axis compressed state. ing.

Then, the above three (L
? No. 1 extracts a signal that remains compressed in time axis even in the multiplexed signal, and uses it as a standard for discrimination of the three signals mentioned above. In practice, all signals to be multiplexed may be in the form of frequency modulated waves;
An advantage is obtained that it becomes possible to improve the S/N ratio of all the signals transmitted.

However, like the above-mentioned embodiment device, the first period corresponding to the sequential synchronizing signals in the periodic signal including the synchronizing signal having a predetermined period, and the first period corresponding to the sequential synchronizing signal, a second period corresponding to a predetermined period in the vicinity of the period, or a second period corresponding to a predetermined period near the period of (When positioning Fj to form a multiplexed signal, one of the signals to be multiplexed to the periodic signal is
If the multiplexed signal is kept in the time-base compressed signal form (the signal remains in the phase-modulated signal form), then when the multiplexed signal is restored, the signal in the above-mentioned signal form will be Take it out.

It can be used as a standard for discrimination between the three signals mentioned above, and when the device of the present invention is used in a recording/reproducing system, tracking control can be performed by using the signal as a tracking reference signal. This makes it possible to provide a recording/reproducing system that facilitates high-density recording. As mentioned above, even in a multiplexed signal, the signal used as a signal in the form of a signal with time axis compression remains somewhat low in S/N.
For example, the signal 1 that does not cause any problem even if RL< RL is used, such as the above-mentioned 1 Herasoking reference signal, cue signal, and other signals.

Furthermore, as mentioned above, when implementing the present invention, the numerical values of M and H can be set arbitrarily, but when setting the numerical value of M HN, the S/N required for the signal must be set. It is determined by taking into consideration the frequency band of the signal and the frequency band of the signal.

Should be. For example, 1' following the standard 1'V scheme where the horizontal scanning frequency is 15.75 +lz
When multiplexing a V video signal with another signal using the device of the present invention, if M is 3 and N is 4, the frequency band of the multiplexed signal is approximately 10 KI according to the sampling theorem.
Iz, and if M is 3 - N is 6, the frequency band of the multiplexed signal is approximately 15 K according to the sampling theorem.
Hz, and further, if M is 3 and N is 8, it will be multiplexed (the frequency band of i is approximately 2 according to the sampling theorem).
01 (llz), but as the number of N increases, the allowable amount of phase shift in the modulated signal becomes smaller, and S/
N continues to deteriorate.

(Effects) As is clear from the detailed explanation above, in the multiplexing and restoring device for multiple signals of the present invention, the signal that is implanted including a synchronization signal having a predetermined period can be During one or both of the first period corresponding to the sequential synchronization signal portion and the second period corresponding to a predetermined period near the first period, By positioning a plurality of other signals in the form of individual time-base compression multiplexed signals, it is easy to multiplex other signals onto the periodic signal and easily combine it with the original signal. Because it can be restored to the original state,
For example, if the device of the present invention is used in a recording and reproducing system, it becomes possible to record and reproduce signals of multiple channels without providing other tracks on the recording medium. Since there is no need for a recording/reproducing element, it becomes easy to downsize and reduce the cost of the device.

Moreover, the multiplexed signal by the device of the present invention is transferred to a rotary head type v
When applied to 1"1 (etc.), no matter how slow the running speed of the magnetic tape is, the quality of the signal is not affected, and since the unevenness of the running speed of the magnetic tape has little effect, there are fewer wows and flutters.

Furthermore, the frequency band occupied by the signal does not expand due to signal multiplexing, and it can also be used for recording and transmitting color TV video signals using the low-frequency conversion carrier color signal method, and post-recording is also easy. It can also be easily used by adding it to a conventional recording/transmission system.

Furthermore, if one of the signals to be multiplexed with the periodic signal is in the form of a signal whose time axis remains compressed even in the multiplexed signal, when the original signal is restored from the multiplexed signal, It is possible to take out a signal of the form and use its JL as a reference for discrimination of the above three signals, and when the device of the present invention is used in a recording/reproducing system, the above signal can be −By using it as a racking reference signal,
Tracking control makes it possible to provide a recording and reproducing system that facilitates high-density recording and reproducing.

Furthermore, in the device of the present invention, the IL circuit configuration used for signal multiplexing and restoration does not require a special time constant circuit or analog circuit, so it can be easily integrated into an integrated circuit.
Since circuits with the same function are often used both when multiplexing signals and when restoring signals,
By switching between the circuits and when restoring the signal, the configuration of the device can be simplified.

In addition, a modulated signal of N/2 wave numbers, whose leading edge and trailing edge are individually phase-modulated by each two held sample value signals in the N held sample value signals, is prepared in advance. A first period corresponding to a synchronization signal of one of every M synchronization signals in a periodic signal configured to include a synchronization signal having a predetermined period, and a predetermined period around the first period. A periodicity including a synchronization signal having a predetermined period as a means for causing the period to be formed within either one or both of the second period corresponding to the period Ac and A. At the signal. A device having an inclined portion within one or both of the first period corresponding to the synchronization signal and the second period corresponding to a predetermined period near the first period. A voltage comparison is made between two sawtooth wave signals and a held sample value signal in a state in which a predetermined DC voltage is superimposed on each, and the phase reference and phase modulation of the rectangular wave signal, which has approximately symmetry in the unmodulated state, are determined. may be performed at the same time, or in a periodic signal including a synchronization period signal having a predetermined period. N/2 formed within one or both of the corresponding first period and the second period corresponding to a predetermined period near the first period. Contains a synchronization signal having a predetermined period as a means for obtaining N restoration-maintaining sample value signals based on information on the leading edge and trailing edge of the phase modulated signal with the number of waves. a first period in response to a synchronization signal in a periodic signal that is
N/2 sawtooth wave signals having a slope part in one or both of the second period corresponding to the predetermined period near the first period are Each pulse corresponding to the leading edge of the phase-modulated signal and each pulse corresponding to the trailing edge are simultaneously sampled and phase-compared, so that the N sample values obtained can be stored individually. At the same time, by using a circuit arrangement configured such that a restored retained sample value (i) is obtained by subtracting a predetermined DC voltage value from each of the N retained sample values, a simple circuit layout can be realized. With this device, it is possible to easily realize multiplexing and restoration of multiple signals with good linearity.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of a multiplexing and restoring device for multiple signals according to the present invention, and FIGS. 2 to 8 are waveform diagrams for explanation. 1, 2.2-1.2-2.2-m, 4-input terminal,
3.5~8...Output terminal, MSGI~MSGm...
Signal processing circuit for signals to be multiplexed, RSGI to R3Gm
...Signal restoration circuit, 5IEP, 5EPr-synchronization separation circuit, PGI, PG2. PGlr, PG2r...Pulse generator, SAW...Sawtooth wave generator, SGI~S
G4. S et al. 1r-5G4r, 5PI-5['4... Sampler, C1-C4, C1r to C4r... Hold capacitor, DCV... Direct current voltage generation circuit, DCVr...
・DC voltage setting circuit + ADDI~ΔDD4...Adder, SUB1~5UB4...Subtractor, PSG・
...Pulse generation circuit, Procedural amendment (spontaneous) January 1, 1982 Patent Application No. 229567 2.9! Name: Multi-signal multiplexing and restoring device 3, relationship with the amended person case Patent Applicant Address: 3-12 Moriya-cho, Kanayō-ku, Yokohama-shi, Kanagawa Prefecture Name (432) Victor Japan Co., Ltd. 4 , Agent address: 3-4-19-915G, Tohinyo-ku, Tokyo Parts, Attached drawing subject to amendment (Fig. 1) 7. Contents of amendment: Fig. 1 of the attached drawing is amended as shown in the attached sheet.

Claims (1)

[Claims] 1. Multiplexing at least one other signal to the configured periodic signal, including a synchronization signal having a predetermined period, and multiplexing as described above. A multi-signal multiplexing and restoring device for restoring a plurality of original signals from a signal that is to be multiplexed into a periodic signal including a synchronization signal having a predetermined period. The same 1υ in a periodic signal including the synchronization signal having a predetermined period as described above
] (Means for sampling by N-phase sampling signal having a period M times the period of the i-th signal, and N sample values 4n obtained by sampling using the above-mentioned N-phase sampling signal. a leading edge and a trailing edge by means for individually holding the N sample value signals, and two each of the N sample value signals obtained by holding the N sample value signals by the holding means. The periodicity (M in the Either or both of the first period corresponding to the synchronizing signal period of one of the individual synchronizing signals and the second period corresponding to a predetermined period near the first period. A plurality of signal multiplexing and restoring apparatus 2 comprising means for causing the N retained sample value signals to exist within a period of phase-modulated signals of N/2 wave numbers, such that the signals are individually phase-modulated, and the phase-modulated signals of N/2 wave numbers are individually phase-modulated. A period corresponding to the synchronization signal period of one of the synchronization signals, or a period corresponding to a predetermined period near the above-mentioned 75 synchronization signal [■
In a periodic signal that includes a synchronization signal having a predetermined period, the period corresponding to the period of the synchronization signal, or the definition near the above-mentioned synchronization By comparing the voltages of one sawtooth wave signal having a slope in the period corresponding to the period corresponding to the period of the waveform and the held sample value signal in a state in which a predetermined DC voltage is superimposed on each signal, it is found that the signal is approximately symmetrical in the non-modulated state. The multiplexing and restoring device 3 for a plurality of signals according to claim 1, which uses a rectangular wave having a characteristic of At least one other signal is multiplexed to a periodic signal composed of a synchronization signal having a period, and the signal is multiplexed as described above.4
A multiple signal multiplexing and restoring device for restoring a plurality of original signals from No. 1 to a periodic signal including a synchronization signal having a predetermined period. The signal is sampled by an N-phase standardization signal having a period M times the period of the synchronization signal in a periodic signal including the synchronization signal having a predetermined period. means for individually holding the N sample value signals obtained by sampling using the N-phase sampling signals; The leading edge and the trailing edge are individually phase modulated by N retained sample values (2 retained sample value signals in number i), and are phase modulated with N/2 wave numbers such that C. The signal has a first period corresponding to the synchronization signal period of one of the M synchronization signals in the periodic signal including the synchronization signal having the predetermined period, and the predetermined period in the multiplexed signal formed by means for causing the predetermined period near the first period to exist within one or both of the predetermined periods and the second period corresponding to the predetermined period; A first period corresponding to the synchronization signal period of one of the M synchronization signals in the periodic signal including a synchronization signal having a period of Each leading edge of a phase modulated signal of N/2 wave numbers that is configured to exist within one or both of a second period corresponding to a predetermined period. means for obtaining N restoration-preserving sample values (No. 3) based on information on the trailing edge and the
means for obtaining N restored sample value signals by sampling the N restored sample value signals with a sampling signal having a predetermined sampling period; a plurality of signals multiplexing and restoring device 4, comprising means for obtaining a restoring signal of ff1, which is multiplexed with a periodic signal composed of a synchronizing signal having a synchronizing signal; A first period corresponding to the synchronization signal period of one of the M synchronization signals added to the periodic signal including the synchronization number m having a predetermined period; In a phase modulated signal of N / 2 wave numbers that is made to exist within one or both of a predetermined period near the first period and a second period corresponding to the second period, Synchronization in a periodic signal comprising a synchronization signal having a predetermined period as a means for obtaining N stability-preserving sample value signals based on information of each leading edge and trailing edge. signal period, or one sawtooth signal having a slope in a period corresponding to a predetermined period near the synchronization signal mentioned above.
/2 pulses corresponding to the leading edge and each pulse corresponding to the trailing edge of the phase modulated signal are sampled almost simultaneously and compared in phase, and -1: N sample values obtained by t is configured to be able to hold each of the N sample values individually, and to obtain a restored sample value signal by subtracting a predetermined DC voltage value from each of the N sample values held.
The multiplexing and restoring device 5 for a plurality of signals according to claim 3 using the iJ path arrangement has at least one signal for a periodic signal including a synchronization signal having a predetermined period. A signal multiplexing and restoring device that multiplexes two other signals and restores a plurality of original signals from the multiplexed signals as described above, and is a synchronous signal having a predetermined period. Synchronization in a periodic signal ((No. 7 means for sampling with an N-phase sampling signal having a period M times the period of
means for individually holding the N sample value signals obtained by sampling according to No. 3; and two each of the N sample value signals obtained by holding the N sample value signals by the holding means. A phase modulated signal of N/2 wave numbers whose leading edge and trailing edge are individually phase modulated by the retained sample value signal. A first period corresponding to the synchronization signal period of one of the M synchronization signals in the periodic signal including the synchronization signal having a predetermined period, and the first period described above. a second period corresponding to a nearby predetermined period; and a synchronization signal having the predetermined period as described above. Synchronization of one of every M synchronization signals in the configured periodic signal (
Exist within one or both of the first period corresponding to period i and the second period corresponding to a predetermined period near the first period. means for obtaining N stability-maintaining sample value signals based on information on respective leading and trailing edges of the phase modulated signal of N/2 wave numbers; N
means for obtaining N restored sample value signals by sampling the N restored sample value signals with a sampling signal of a predetermined sampling period; A device for multiplexing and restoring multiple signals, comprising: means for obtaining a restored signal of another signal multiplexed with a periodic signal including a synchronization signal having