JPS61212181A - Recording and reproducing device for wide band information signal - Google Patents

Abstract

PURPOSE:To obtain pictures of wide band and high quality and adjust the phase of sampling pulses easily by subjecting a wide band information signal to subNyquist sampling and superposing a pilot signal to record and reproduce signals in plural channels. CONSTITUTION:n-number of kinds of sampled signal different in sampling point position from one another which are obtained by subjecting an information signal or a luminance signal, whose band is wider than a recording and reproducing band, are recorded on n-number of parallel tracks independently and simultaneously and are reproduced and transmitted in a form of narrow band signals. For example, three kinds of FM signal taken out from frequency modulators 19, 20 and 21 are supplied to rotary heads 22, 23 and 24 through a recording amplifier, etc. and are recorded on three parallel tracks of a magnetic tape independently and simultaneously. Thus, three parallel tracks are formed simultaneously with respect to a recording track pattern on a magnetic tape 25 when an inline type head assembly is used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a recording/reproducing device for wideband information signals, which performs so-called sub-Nyquist sampling on information signals with a wider band than the band of a transmission line without time conversion. The present invention relates to an apparatus for recording on a recording medium and reproducing the same.

Conventional technology Conventionally, when recording and reproducing information signals with a wider band than the transmission band of the recording/reproducing system (transmission path), the information signal is time-converted (compression and expansion of the time axis), and the band is divided into multiple recording and reproducing on multiple channels, or sampling with a sampling pulse of a frequency higher than the upper limit frequency of the information signal and less than twice the upper limit frequency (so-called sub-Nyquist sampling), and recording it on multiple channels, Play (for example, Japanese Patent Application Laid-Open No. 58-114530)
No.) was being carried out.

Problems to be Solved by the Invention However, all of these conventional narrowband transmission methods have complex circuits and are expensive, and are only used in some high-priced products. It was unsuitable for application to household recording and reproducing devices. Also, if jitter or S/N deterioration occurs, check the sampling pulse generation circuit (for example, phase-locked circuit) in the reproduction system.
The image displayed on the screen may be unstable and the image quality may deteriorate, as the loop may track high-frequency jitter and the hue may gradually change over time. Currently, high-quality images cannot be obtained. Furthermore, a circuit for adjusting the phase of the sampling pulse is required so that the sampling point during playback is the same as during recording, and this adjustment is troublesome and inconvenient.

SUMMARY OF THE INVENTION Accordingly, the present invention provides a wideband information signal recording and reproducing apparatus that solves the above-mentioned problems by subjecting the wideband information signal to sub-Nyquist sampling and superimposing a pilot signal for recording and reproducing in a plurality of channels. With the goal.

Means for Solving the Problems The wideband information signal recording and reproducing apparatus according to the present invention includes a sampling means for obtaining n types of sampling signals, a pilot signal generation means, a mixing circuit 1 frequency modulation means, a recording means, and a reproducing means. , demodulation means, pilot signal discrimination and separation means, and second sampling pulse generation means.

It consists of a resampling means and a reproduced information signal output means.

The sampling means has a frequency that is less than twice the upper limit frequency of the information signal or luminance signal to be recorded and reproduced, and whose phases are 360°/n (where n is an integer of 2 or more).
The information signal or the luminance signal is separately sampled using n different types of first sampling pulses to obtain n types of sampled signals. Further, the bit signal generating means generates a pilot signal having a frequency synchronized with the first sampling pulse.

In the first invention, n consists of n types of sampling signals and a pilot signal multiplexed on at least one of them
N types of frequency modulated wave signals obtained by frequency modulating with the seed signals are recorded separately and simultaneously on n parallel tracks by the recording means, and are reproduced. In the second invention, at least one of the n types of frequency modulated wave signals obtained by frequency modulating the sampling signal is multiplexed with a pilot signal, and recorded on the n parallel tracks,
Play this. Further, in the third invention, among n types of frequency modulated wave signals obtained by frequency modulating with n types of signals consisting of n types of sampling signals and a pilot signal multiplexed with at least one of the sampling signals, One frequency modulated wave signal is frequency-division multiplexed with a low-pass conversion carrier color signal, and is recorded on the n parallel tracks together with the remaining n-1 frequency modulated wave signals, and then reproduced. Furthermore, in the fourth invention, a pilot signal is multiplexed on at least one of the n types of frequency modulated wave signals obtained by frequency modulating only the sampling signal, and furthermore, a low frequency conversion carrier is applied only to a specific multiplexed signal. The color signals are frequency-division multiplexed, and these n types of multiplexed signals are recorded on the n parallel tracks and reproduced.

In the present invention, n types of sampled signals obtained by sub-Nyquist sampling of an information signal or a luminance signal in a band wider than the recording/reproduction band, and which have different sampling point positions, are separately arranged in n parallel tracks, and Since it is recorded and played back simultaneously, it can be transmitted in the form of a narrowband signal. In addition, after resampling the n types of reproduced sampling signals by the resampling means, by adding and combining them, the information signals or luminance signals of n sampling points are generated in time series within one period of the sampling pulse. This results in a signal that is sampled at a frequency that is substantially n times the sampling pulse frequency. Here, since the resampling means is supplied with a second sampling pulse synchronized with a pilot signal whose frequency is synchronized with the first sampling pulse during recording, there is no jitter in the reproduced signal from the reproduction means. It is also possible to sample the same sample point positions as during recording. Hereinafter, each embodiment of the present invention will be described with reference to the drawings.

Embodiment FIG. 1 shows a block system diagram of a recording system of a first embodiment of the apparatus of the present invention. In the following, each embodiment will be described for the case where the value of n is "3". In FIG. 1, an information signal having a frequency spectrum shown in FIG. The information signal is supplied to a circuit 6. Here, the information signal is a signal consisting of a video signal having video information (for example, a luminance signal, a three primary color signal, a component signal consisting of two types of color difference signals and a luminance signal, etc.) and a composite synchronization signal. It is a broadband signal that is approximately three times or less than the recording/reproducing band.In addition, when recording and reproducing three primary color signals or component signals as information signals, three sets of recording/reproducing section, pilot signal section, sampler, etc. are required. 3n is also required for the track.Furthermore, if each signal does not require any of the above bands,
A combination is also possible, such as using any two of samplers 3 to 5 to perform sub-Nyquist sampling, and not using the remaining sampler to record other signals.

A phase-locked rope (PLL) 7 generates a pulse b as shown in FIG. Then, ternary) counters 8 and 2
The decimal (in this case, quinary) counter 9 is supplied with pulses of the horizontal scanning period as synchronization pulses.
and a terminal 18 of a switch circuit 18, which will be described later.
b as a horizontal sync pulse. The pulses whose frequency has been divided by 1/2 by the k-ary counter 8 are waveform-shaped by the waveform shaping circuit 10, and as shown in FIGS. ), three types of pulses c, d, and e with different phases are generated respectively, and these pulses C to e are used as sampling pulses by the sampler 3.
．． 4.5 separately. Here, each repetition frequency of the sampling pulses ce is a frequency that is less than or equal to twice the upper limit frequency of the input information signal, and is an odd multiple of fH/2 (however, fH is the horizontal scanning frequency). Selected.

Samplers 3.4 and 5 are circuits that sample the input information signal when the sampling pulses 0°d and e arrive and hold the sampling signals until the next sampling pulse arrives, and the sampled signals extracted from them are After the sampling pulse frequency components are removed by low-pass filters 11, 12 and 13, the signals are supplied to mixing circuits 14, 15 and 16. Therefore, if the input information signal of the samplers 3 to 5 is a sine wave a as shown in FIG. 3 (A>),
The output signal waveforms of the low-pass filters 11, 12 and 13 are as follows:
Figure 3 (F), where the sample point positions differ by 120 degrees from each other,
The sampled signals r, g, and k as shown in (G) and (H) are obtained.

On the other hand, the pulse taken out from the binary counter 9 is supplied to a bandpass filter 17, where harmonic components are removed and the pulse is made into a sine wave.
~16 respectively.

As a result, each output signal of the mixing circuit 14=16 is a sampled signal f, Q having a band of about 173 of the original information signal band, as shown in FIG.
Or, it becomes a frequency division multiplexed signal consisting of h and a pilot signal of the frequency spectrum shown by ■. Mixing circuit 14
The output frequency division multiplexed signal is sent to terminal 1 of the switch circuit 18.
8a. Switch circuit 18 is normally connected to terminal 18
It selectively outputs the input signal a, but only during the input period of the horizontal synchronizing signal, the horizontal synchronizing pulse supplied to the terminal 18b from the counter in the PLL 7 through the gate circuit 26 for time adjustment is selectively output. an output signal of the switch circuit 18;
The output signals of the mixing circuits 15 and 16 are fed to frequency modulators 19, 20 and 21, respectively, where they are frequency modulated. As a result, the frequency spectra of the three types of frequency modulated wave signals (hereinafter referred to as FM signals) taken out from the frequency modulators 19, 20 and 21 become as shown in FIG. 2(C). In the figure (C), ■ indicates the carrier wave shift band of the frequency-modulated information signal, and I[[L.

1 [[u indicates the lower sideband and upper sideband of the frequency-modulated information signal, and ■ indicates the band (lower sideband) of the frequency-modulated pilot signal. Note that Fig. 2 (C) shows only the frequency spectrum within the recording and reproducing band (
The same applies to FIGS. 9, 12, and 15, which will be described later).

Three types of FM signals taken out from frequency modulators 19, 20 and 21 are supplied to rotary heads 22, 23 and 24, respectively, through a recording amplifier (not shown), etc., so that three parallel FM signals are recorded on the magnetic tape. recorded on tracks separately and simultaneously. Here the rotating heads 22, 23 and 24
For example, the head 22a has a sliding surface shape as shown in FIG. 4(A).

Two in-line head assemblies in which 23a and 24a are aligned in a direction perpendicular to the head scanning direction (track width direction) are fixedly mounted facing each other on a two-rotation drum. Or a head 22b having a sliding surface shape as shown in FIG. 4(B).

23b and 24b are mutually I in the head scanning direction.
H (H is a horizontal scanning period) The structure is such that two separate head assemblies, each of which is deviated by a horizontal scanning period, are fixedly mounted on a rotating drum, facing each other.

As a result, when the in-line head assembly is used, the recording track pattern on the magnetic tape 25 is such that, as shown in FIG. →TA2→Te
They are formed in the following order: 2→...

Next, the reproduction system of the first embodiment of the apparatus of the present invention will be explained with reference to FIG. In the figure, three recording tracks of a recorded magnetic tape having the same recording track pattern as in FIG. 5 are simultaneously and separately scanned by rotary heads 22-24. As a result, the reproduced signal extracted from the rotary head 22, 23, 24 (the frequency spectrum of which is shown in FIG. and frequency demodulators 37, 38, and 39, respectively, as shown in FIG. 2(B).
After being made into three types of frequency division multiplexed signals with frequency spectra as shown in FIG. The regenerated pilot signal occupying the high frequency region is supplied to the ^-band filters 43, 44, and 45, where it is converted into a P wave. The reproduced frequency division multiplexed signal taken out from the frequency demodulator 37 is further processed by the horizontal synchronization signal separation circuit 46 to extract only the horizontal synchronization signal, and then processed into the PLL.
47. The PLL 47 generates and outputs a signal, as shown in FIG.
50 as a reference signal, and here the phase is compared with the reproduced pilot signals from high-pass filters 43 to 45.

The error voltage corresponding to each jitter of the reproduction signals of the three reproduction tracks extracted from the phase comparators 48 to 50 is as follows.
It is supplied to synchronous oscillators 51 to 53, which oscillate and output a signal whose phase is synchronized with the reproduced pilot signal. The output signals of the synchronous oscillators 51 to 53 are frequency-divided by 1/1 by binary counters 54 to 56, and then waveform-shaped and sent to the waveform shaping circuit 1.
After being made into three types of sampling pulses having the same frequency as the zero output sampling pulse and the same phase as during recording, they are supplied to samplers 60 to 62. The samplers 60, 61 and 62 resample the reproduced sampled signals from the filter circuits 40, 41 and 42 using the sampling pulses. At this time, even if there is jitter in the reproduced sampled signal or if the horizontal synchronization signal is affected by noise, the waveform shaping circuit 57 to
Since the sampling pulse from 59 is also output with a phase corresponding to the sampling pulse, it is possible to always re-sample the same sampling point position as at the time of recording.

Three types of resampled signals extracted from the samplers 60, 61 and 62 and whose sampling point positions are shifted by 120 degrees of the sampling pulse are supplied to an adder circuit 63.
Here, the signals are added and combined to form a composite signal as shown in FIG. 7(B). In Figure 7 (B), r, g and h are shown in Figure 3 (F).
), (G) and (H) sampled signals f9g and h
Indicates that this is a signal section. The output signal of the adder circuit 63 has unnecessary high frequency components removed by a low-pass filter 64, is converted into a reproduced information signal as shown in FIG. 7(C), and is then outputted to an output terminal 65.

Here, the output addition composite signal of the adder circuit 63 is generated by the samplers 60, 61 and 62 within one period of the sampling pulse.
Since it is a signal obtained by sequentially and time-seriesly synthesizing each resampled signal of It is equivalent to the signal. Therefore, even if the output terminal 65 passes through a recording/reproducing system that can transmit only a narrow band signal as shown in FIG. 2(B), a wide band reproduced information signal identical to the original information signal can be obtained.

Next, a recording system of a second embodiment of the apparatus of the present invention will be explained with reference to FIGS. 8 and 9. In FIG. 8, the same components as in FIG. 1 are denoted by the same reference numerals, and their explanations will be omitted. This embodiment is characterized in that the pilot signal is directly recorded without frequency modulation. In FIG. 8, the switch circuit 68 normally selects and outputs the first sampling signal supplied from the sampler 3 to the terminal 68a, but only the horizontal synchronizing signal is input to the terminal 68b, which is the horizontal synchronizing signal taken out from the gate circuit 26. Select and output. Switch circuit 68. Each output sampling signal of samplers 4 and 5 is output to a frequency modulator 69, 70 and 7.
1, and after being frequency modulated here, the frequency components of the pilot signal band are sufficiently attenuated by high-pass filters 72, 73 and 74, and then sent to mixing circuits 75, 76 and 77.
supplied to This allows mixing circuits 75, 76 and 7
7 to 7, the frequency spectrum as shown in FIG. 9 is obtained, respectively.
After the frequency division multiplexed signal consisting of the FM sampling signal and the pilot signal is extracted, it is supplied to the rotary heads 22, 23 and 24 through recording amplifiers 78, 79 and 80, thereby forming three parallel tracks. recorded.

In Fig. 9, ■ is the carrier wave shift band of the frequency-modulated sampling signal, VL + VLI is the lower sideband and upper sideband of the frequency-modulated sampling signal, and ■ is the frequency spectrum of the pilot signal. It is. In this way, according to this embodiment, the FM sampling signal acts like a high frequency bias, and the pilot signal can be recorded with good linearity.

Next, a reproduction system of a second embodiment of the apparatus of the present invention will be explained with reference to FIG. In FIG. 10, the same components as those in FIG. 6 are denoted by the same reference numerals, and their explanations will be omitted. In FIG. 10, the three types of frequency division multiplexed signals extracted from the equalizer amplifiers 34, 35, and 36 each consist of an FM sampling signal and a pilot signal.
The output FM sampled signal of 4 (which also includes a horizontal synchronization signal) is supplied to high-pass filters 81, 82 and 83, where the FM sampled signal is separated, while the low-pass filter 84, 85 and 86, where the regenerated pilot signal is separated into P waves and then supplied to phase comparators 48, 49 and 50.

On the other hand, the reproduced FM sampling signals extracted from the high-pass filters 81, 82 and 83 are sent to frequency demodulators 87, 88 and 8.
9, where it is frequency demodulated (FM demodulated) to produce a reproduced sampled signal, which is then supplied to samplers 60, 61, and 62. Further, the horizontal synchronization signal in the output reproduction signal of the frequency demodulator 87 is separated and extracted by the horizontal synchronization signal separation circuit 46.

Next, to explain the recording system of the third embodiment of the apparatus of the present invention, FIG. 11 shows a block system diagram of the main parts of the recording system of the third embodiment of the apparatus of the present invention. In the same figure, input terminals 91 and 92
and 93 receive a frequency division multiplexed signal of the pilot signal and a sampling signal obtained by subjecting the luminance signal to sub-Nyquist sampling, and the input sampling signal of the input terminal 91 includes a horizontal synchronization pulse only in the horizontal synchronization signal section. It has been replaced by

These three types of frequency division multiplexed signals are generated by separating the luminance signal and the carrier color signal from the composite color video signal to be recorded and reproduced, and supplying the luminance signal to the input terminal 1 shown in FIG. ．． It can be obtained from each output terminal of mixing circuits 15 and 16, respectively. The input frequency division multiplexed signal at the input terminal 91 is supplied to a frequency modulator 94, where it is converted into an FM signal, and then a high-pass filter 95 sufficiently attenuates the low-pass conversion carrier color signal band, which will be described later, and is further mixed. The signal is supplied to circuit 96.

On the other hand, the carrier color signal separated from the composite color video signal is converted to the output FM of the high-pass filter 95 by well-known means.
After being converted to an empty frequency band lower than the frequency band of the signal, the signal is sent to the mixing circuit 96 via the input terminal 97.
supplied to As a result, the mixing circuit 96 outputs the 12th
A frequency division multiplexed signal consisting of an FM signal with a frequency spectrum as shown in the figure and a low frequency converted carrier color signal is extracted and supplied to the rotary head 22 through a recording amplifier 98. In FIG. 12, ■ is the carrier wave shift band of the frequency-modulated sampling signal (luminance signal), and ■L.

■U indicates the lower sideband and upper sideband of the frequency-modulated luminance signal, ■ indicates the frequency spectrum of the lower sideband of the frequency-modulated pilot signal, and ■ indicates the frequency spectrum of the low-pass converted carrier chrominance signal. shows.

Such a frequency spectrum is approximately matched to that of current VTRs. Further, in FIG. 11, the frequency division multiplexed signal from the input terminals 92.93 passes through the frequency modulator 99.100 and the recording amplifier 101.102 to the rotary head 2 described above.
Delivered on 3.24.

Note that the frequency spectrum of the output signals of the frequency modulators 99 and 100 corresponds to the one without the low-frequency conversion carrier color signal indicated by IX in FIG. It can also be made wider.

Next, the main parts of the reproduction system of the third embodiment of the apparatus of the present invention will be explained with reference to FIG. 13. In the figure, the same components as those in FIG. The reproduced frequency division multiplexed signal having a frequency spectrum as shown in FIG. The signal is then supplied to a well-known reproduced carrier color signal processing circuit (not shown), where it is returned to the reproduced carrier color signal of the original band. Furthermore, the reproduced frequency division multiplexed signal from the equalizer amplifier 34 is passed through the high-pass filter 1.
07, where the FM multiplex signal is separated into P waves and then supplied to a frequency demodulator 108. Further, the FM multiplexed signal extracted from the equalizer amplifier 35.degree. 36 is frequency demodulated by frequency demodulators 109 and 110.

As a result, the frequency division multiplexed signals of the reproduced sampled signal and the reproduced pilot signal extracted from the frequency demodulators 108 to 110, respectively, are supplied to the low-pass filters 111 to 113, and the reproduced sampled signals are separated into P waves. Output terminal 114
~116, while high-pass filters 117~11
9, the reproduced pilot signal is separated into P waves, and outputted to output terminals 120-122. Hereinafter, by signal processing similar to that shown in Fig. 6, three types of reproduced sampled signals are resampled using sampling pulses generated based on the reproduced pilot signal, and then they are added and combined to obtain a wideband reproduced luminance signal. . This reproduced luminance signal is multiplexed with the aforementioned reproduced carrier color signal to form a reproduced composite color video signal.

Next, the main parts of the recording system of the fourth embodiment of the apparatus of the present invention will be explained with reference to FIGS. 14 and 15. 8th in Figure 14
Components that are the same as those in the figures are given the same reference numerals, and their explanations will be omitted. In FIG. 14, input terminals 125, 126 and 127 receive a sampling signal obtained by subjecting the luminance signal to sub-Nyquist sampling, and an input terminal 125 receives a horizontal synchronization pulse as a sampling signal only in the horizontal synchronization signal section. It is replaced by and input. These three types of input sampling signals are obtained by separating the luminance signal and the carrier color signal from the composite color video signal to be recorded and reproduced, and supplying the luminance signal to the input terminal 1 shown in FIG. ．． Sampler 4 and 5
can be obtained from each output terminal of . Input terminal 125
The input signal of is fed to a frequency modulator 69 where the FM
After being converted into a signal, it is supplied to the mixing circuit 128 through a high-pass filter 72. The pilot signal from the bandpass filter 17 is supplied to the mixing circuits 128, 76 and 77 via an input terminal 129.

On the other hand, the carrier color signal separated from the composite color video signal is converted to the output FM of the high-pass filter 72 by well-known means.
After the signal and the pilot signal from the input terminal 129 are low-frequency converted to an unoccupied frequency band lower than the image frequency band of the pilot signal, the signal is supplied to the mixing circuit 128 via the input terminal 130. As a result, a frequency division multiplexed signal consisting of an FM signal with a frequency spectrum as shown in FIG. Supplied. In Fig. 15, X is the carrier wave shift band of the frequency-modulated sampling signal (luminance signal), Xc, ,
u is the lower sideband and upper sideband of the frequency-modulated luminance signal,
XI indicates the frequency spectrum of the pilot signal, and X■ indicates the frequency spectrum of the low-pass conversion carrier color signal. Such a frequency spectrum is approximately matched to that of current VTRs.

Next, the main parts of the reproduction system of the fourth embodiment of the apparatus of the present invention will be explained with reference to FIG. 16. In the figure, the same components as those in FIG. 10 are denoted by the same reference numerals, and the explanation thereof will be omitted. however,
The cutoff frequencies of the high-pass filters 81-83° and the low-pass filters 85, 86 are not necessarily the same as those shown in FIG. Three types of reproduced sampled signals are separately output from the frequency demodulators 87, 88 and 89 to output terminals 131, 132 and 133. On the other hand, the reproduced frequency division multiplexed signal having the frequency spectrum as shown in FIG. is supplied to a well-known reproduced carrier color signal processing circuit (not shown), where it is returned to the original band reproduced carrier color signal.

Further, the reproduced frequency division multiplexed signal from the equalizer amplifier 34 is supplied to a bandpass filter 136, where the reproduced pilot signal having the frequency spectrum shown by XI in FIG.

Furthermore, the output terminal 138.1 from the low-pass filter 85.86
The regenerated pilot signal is taken out to 39. Below, the first
Through signal processing similar to that shown in FIG. 0, three types of reproduced sampled signals are resampled using sampling pulses generated based on the reproduced pilot signal, and then they are added and combined to obtain a wideband reproduced luminance signal. This reproduced luminance signal is multiplexed with the aforementioned reproduced carrier color signal to form a reproduced composite color video signal.

Note that the present invention is not limited to the above-mentioned embodiments. For example, the pilot signal is inserted into the horizontal blanking period and recorded, and the pilot signal is inserted from the horizontal blanking period during playback so that it has the same phase as during recording. The signals may be extracted separately. In this case, the sampling signal with the pilot signal inserted into the horizontal blanking period may be frequency modulated, or the pilot signal is superimposed on the section corresponding to the horizontal blanking period of the FM signal obtained by frequency modulating the carrier wave with the sampling signal. You may also do so. Furthermore, it is desirable for pilot signal recording tracks to be recorded on all tracks as in the above embodiments for recording and reproducing apparatuses that require high accuracy; however, for recording and reproducing apparatuses that do not require high accuracy, such as home VTRs, A pilot signal may be recorded on n −i or less tracks and used as a reproduced pilot signal for all zero tracks during reproduction. Furthermore, it is also possible to record only the synchronization signal on a separate track. Furthermore, the recording medium is not limited to magnetic tape, but also includes video disks.

It can also be applied to other recording media such as magnetic disks.

Effects of the Invention As described above, according to the present invention, the information signal is separately subjected to sub-Nyquist sampling using 0 types of sampling pulses, and then recorded on 0 parallel tracks and reproduced. It is possible to record and play back information signals with a wider band than the band, and during playback, a pilot signal synchronized with the sampling pulse during recording is played back, and based on that, a sampling pulse during playback is generated to generate a playback sampled signal. Even if there is jitter or noise in the reproduced signal, the same sampling point position as at the time of recording can be resampled with high accuracy. Therefore, these resampled signals can be resampled. The reproduced information signal obtained by combining is also wideband,
It has many features such as being able to maintain high quality, stabilizing the image, and not requiring a sampling pulse phase adjustment circuit or adjustment operation.

[Brief explanation of drawings]

1 and 6 are block system diagrams showing the recording system and reproduction system of the first embodiment of the apparatus of the present invention, respectively. FIG. 2 is a diagram showing the signal frequency spectrum of each part of the block system shown in FIG. 3 is a signal waveform diagram for explaining the operation of the block system shown in FIG. 1, FIG. 4 is a schematic diagram showing the shape of each sliding surface of the rotary head used in the device of the present invention, and FIG. 5 is a signal waveform diagram for explaining the operation of the block system shown in FIG. FIG. 7 is a diagram showing an example of a recording track pattern. FIG. 7 is a signal waveform diagram for explaining the operation of the block system shown in FIG.
1 and 10 are block system diagrams respectively showing the recording system and reproduction system of the second embodiment of the apparatus of the present invention, FIG. 9 is a signal frequency spectrum diagram of the main part of the block system shown in FIGS. 8 and 10, FIG. 11 and FIG. 13 show the third part of the device of the present invention, respectively.
FIG. 12 is a block system diagram showing the main parts of the recording system and reproduction system of the embodiment; FIG. 12 is a signal frequency spectrum diagram of the main part of the block system shown in FIGS. 11 and 13; FIGS. 14 and 16
The figures are block system diagrams showing the main parts of the recording system and playback system of the fourth embodiment of the apparatus of the present invention, respectively, and FIG. 15 is a signal frequency spectrum diagram of the main parts of the block systems shown in FIGS. 14 and 16. . 1... Information signal input terminal, 3~5.60~62...
Sampler, 6, 46...Horizontal synchronization signal separation circuit, 7゜47...Phase locked loop (PLL), 8
．． 54-56... K-ary counter, 9... Binary counter, 10.57-59... Waveform shaping circuit, 14-16
．． 75~77...Mixing circuit, 17...Band filter, 18.68...Switch circuit, 19~21°69~
71.94.99.100...Frequency modulator, 22~
24... Rotating head, 25.30... Magnetic tape,
37-39.87-89.108-11'O...Frequency demodulator, 40-42...Filter circuit, 43-4
5.72~74.81~83.95, 107°117~
119... High-pass filter, 48-50... Phase comparator, 51-53... Synchronous oscillator, 63... Addition circuit, 65... Reproduction information signal output terminal, 97, 130...
・Low frequency conversion carrier color signal input terminal, 105.134...
Low-pass filter for reproduction low-pass conversion carrier color signal P wave, 114~
116, 131-133... Regenerated sampling signal output terminals, 120-122, 137-139... Regenerated pilot signal output terminals.

Claims (5)

[Claims] (1) n types of first sampling pulses that have a frequency that is less than twice the upper limit frequency of the information signal to be recorded and reproduced, and whose phases differ from each other by 360°/n (where n is an integer of 2 or more) sampling means for separately sampling the information signal to obtain n types of sampling signals; means for generating a pilot signal having a frequency that is periodic to the first sampling pulse; a mixing circuit that multiplexes at least one of the different sampled signals, and a frequency modulation means that separately frequency-modulates each output signal of the mixing circuit to generate n types of frequency-modulated wave signals. and the n types of frequency modulated wave signals are arranged in parallel n on a recording medium.
a recording means for recording on the tracks of a book separately and simultaneously; a reproducing means for simultaneously scanning every n recording tracks on the recording medium to simultaneously reproduce the n types of frequency modulated wave signals; demodulating means for separately demodulating the n types of frequency modulated wave signals from the reproducing means to obtain n types of reproduced signals; means for discriminating and separating the pilot signal from among the n types of reproduced signals; n which is synchronized with the separated pilot signal, has the same frequency as the first sampling pulse, and whose phases differ from each other by 360°/n.
means for generating a second sampling pulse of the species;
resampling means for obtaining n types of resampled signals by separately resampling n types of reproduced sampling signals discriminately separated from the types of reproduced signals using second sampling pulses of the n types; 1. A recording and reproducing apparatus for a wideband information signal, comprising reproduction information signal output means for receiving resampled signals of different types and adding and combining them to generate and output a reproduction information signal. (2) The information signal is a signal consisting of a video signal having video information and a composite synchronization signal, and the pilot signal generation means generates the pilot signal by frequency-multiplying the horizontal periodic signal in the composite synchronization signal. 2. A wideband information signal recording and reproducing apparatus according to claim 1, which is means for recording and reproducing broadband information signals. (3) n types of first sampling pulses that have a frequency that is less than twice the upper limit frequency of the information signal to be recorded and reproduced, and whose phases differ from each other by 360°/n (where n is an integer greater than or equal to 2); sampling means for separately sampling the information signal to obtain n types of sampling signals; means for generating a pilot signal of one frequency synchronized with the first sampling pulse; a frequency modulation means for separately frequency-modulating signals to generate n types of frequency-modulated wave signals; and a mixing circuit for multiplexing at least one frequency-modulated wave signal among the n types and the pilot signal, respectively. , recording means for separately and simultaneously recording n types of output signals of the mixing circuit on n parallel tracks on a recording medium; and recording means for simultaneously scanning every n recording track on the recording medium. a reproducing means for simultaneously reproducing the n types of signals; and a reproducing means for discriminating and separating the n types of frequency modulated wave signals from the n types of reproduced signals from the reproducing means, and demodulating and demodulating the n types of reproduced sampled signals. a demodulating means for obtaining the first sampling pulse; means for generating n types of second sampling pulses that differ from each other by 360°/n; and means for separately resampling the n types of reproduced sampling signals with the n types of second sampling pulses to generate n types of re-sampling signals. Broadband information comprising a resampling means for obtaining a sampled signal, and a reproduction information signal output means for receiving the n types of resampling signals and adding and combining them to generate and output a reproduction information signal. Signal recording and reproducing device. (4) The information signal is a signal consisting of a video signal having video information and a composite synchronization signal, and the pilot signal generating means frequency-multiplies the horizontal synchronization signal in the composite periodic signal to 4. The wideband information signal recording and reproducing apparatus according to claim 3, wherein the pilot signal is generated at a frequency selected within an unoccupied frequency band lower than the frequency band of the modulated wave signal. (5) The frequency is less than twice the upper limit frequency of the required band of the luminance signal in the composite color video signal to be recorded and reproduced, and
Sampling to separately sub-Nyquist sample the luminance signal using n types of first sampling pulses whose phases differ from each other by 360°/n (where n is an integer of 2 or more) to obtain n types of sampled signals. means for generating a pilot signal with a frequency synchronized with the first sampling pulse; and a mixing circuit for multiplexing the pilot signal onto at least one sampling signal among the n types of sampling signals; frequency modulation means for separately frequency modulating each output signal of the mixing circuit to generate n types of frequency modulated wave signals; Multiplexing means for frequency-division multiplexing a low-frequency-converted carrier color signal obtained by low-pass conversion into an empty frequency band lower than the frequency band of the frequency-modulated wave signal, onto the one frequency-modulated wave signal. and the frequency division multiplexed signal from the multiplexing means and the n-1 types of frequency modulated wave signals excluding the one frequency modulated wave signal, respectively, to n parallel tracks on a recording medium, separately. and a recording means for simultaneously recording, and a reproducing means for simultaneously scanning every n recording track on the recording medium to simultaneously reproduce the one frequency division multiplexed signal and the n-1 types of frequency modulated wave signals. and means for obtaining a reproduced carrier color signal of the original band after discriminating and separating the low-pass converted carrier color signal from the frequency division multiplexed signal from the reproduction means, and the frequency division multiplexed signal from the reproduction means. means for discriminating and separating the one frequency modulated wave signal from among them; and separately demodulating the discriminately separated one frequency modulated wave signal and the n-1 frequency modulated wave signals from the reproducing means. demodulating means for obtaining n types of reproduced signals; means for discriminating and separating the pilot signal from among the n types of reproduced signals; and a means for discriminating and separating the pilot signal from among the n types of reproduced signals; means for generating n types of second sampling pulses having the same frequency and whose phases differ from each other by 360°/n; a resampling means for separately resampling using n types of second sampling pulses to obtain n types of resampled signals; and a resampling means for obtaining n types of resampled signals, which are supplied and summed and synthesized to reproduce a reproduced luminance signal. 1. A recording and reproducing apparatus for a wideband information signal, comprising: a reproduced luminance signal output means for generating and outputting a reproduced luminance signal. 6) The frequency is less than twice the upper limit frequency of the required band of the luminance signal in the composite color video signal to be recorded and reproduced, and the phases thereof differ from each other by 360°/n (where n is an integer of 2 or more). Sampling means for separately sub-Nyquist sampling the luminance signal using n types of first sampling pulses to obtain n types of sampled signals, and generating a pilot signal of one frequency synchronized with the first sampling pulse. and frequency modulation means for separately frequency modulating the n types of sampling signals to respectively generate n types of frequency modulated wave signals;
A carrier color signal separated from the composite color video signal is obtained by converting the carrier color signal into a frequency band of one of the n types of frequency modulated wave signals and an empty frequency band lower than the pilot signal. multiplexing means for frequency division multiplexing a low frequency modulated carrier color signal into the one frequency modulated wave signal; and at least one signal among the n types of frequency modulated wave signals including the one frequency modulated wave signal. a mixing circuit for multiplexing and the pilot signal, a recording means for separately and simultaneously recording n types of signals from the mixing circuit onto n parallel tracks on a recording medium; reproducing means for simultaneously scanning n recording tracks every n to simultaneously reproduce the n types of signals; means for obtaining a reproduced carrier color signal in a band of , and a means for discriminating and separating the n types of frequency modulated wave signals from the n types of reproduced signals from the reproducing means, demodulating them to obtain n types of reproduced sampled signals. demodulating means for obtaining a signal, and a demodulating means for separating the pilot signal from among the n types of reproduced signals from the reproducing means, and synchronizing the pilot signal with the pilot signal, having the same frequency as the first sampling pulse, and whose phases are mutual to each other. The second of n types different by 360°/n
resampling means for separately resampling the n types of reproduced sampling signals with the n types of second sampling pulses to obtain n types of resampled signals; 1. A recording and reproducing device for a wideband information signal, comprising a reproduced luminance signal output means which is supplied with n types of resampled signals and adds and synthesizes them to generate and output a reproduced luminance signal.