JPS58143688A - Image pickup signal recording and reproducing system - Google Patents

Abstract

PURPOSE:To make an 8mm. video compact and facilitate adjusting of the color temperature, the white balance, etc., by recording luminance components with FM modulation and converting color components to a low band to record them. CONSTITUTION:The image pickup output from an image pickup tube 4 is amplified in a preamplifier 5, and luminance components are separated by a low pass filter 6, and a synchronizing signal is superposed to them, and they are subjected to FM modulation. Color components separated by a band pass filter 7 are converted to a low band after a pilot burst signal is superposed to them. Luminance components subjected to FM modulation and color components subjected to low band conversion are added and are recorded onto a video tape. In the reproducing, a video signal is obtained with reverse procedures in a reproducing adapter. Consequently, since a reproducing principal circuit is omitted from a camera body, to make the camera small-sized. Further, the camera is adjusted while reproducing the signal.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a video camera with a VTR1-integrated n8
This invention relates to an image signal recording and reproducing system that is effective when adopted for millivideo.

It is desired that the 8i video player be lightweight and compact. Therefore, even if the recording method is such that the imaging output is converted to a t-MT8G signal and the color signal is low-frequency converted, the color component k[l! ! The system that improves low frequency conversion is more advantageous in terms of recording, and at the same time, in terms of playback, if a separate playback adapter is used, the 8-inch video can be made even more compact and practical. Furthermore, if the above-mentioned recording method is adopted, it is possible to convert the reproduction output tw and image output to K9, and the color temperature can be easily adjusted within one night, unlike what was conventionally done at the time of recording. It is convenient to make adjustments while watching the color monitor during playback.

In view of the above-mentioned points, the present invention provides bright component IF of imaging output.
M modulation arrangement and 3-58 MH! A recording unit that converts and outputs the spatially modulated color components in the low range.
A new and effective imaging signal recording and reproducing system that performs demodulation and high-frequency conversion, returns to the imaging output, and adjusts the imaging output to adjust the color temperature and white balance of the playback monitor. Hereinafter, the present invention will be described according to an illustrative embodiment.The recording unit shown in FIG.

The recording KWI includes a synchronization signal generation circuit (a high voltage generation circuit (2) synchronized with the output of 11 and a deflection circuit 13).

The imaging tube (4) is used to derive the imaging output. This image pickup tube is a general-purpose one with a cross-shaped color stripe field, and has two types of CVVT4 that contain color components.
*-w 17th (5,58M HI): nl, the phase is shifted in opposite directions to each other by π/2 at nl, sharpness H%, and the phase is reversed from the carrier exactly 2H before, and becomes related to *H. Ruru. The imaging output consisting of a luminance component and a component 9 is amplified through a preamplifier (51t) and
- Pass filter 16+ First band pass filter (7
) is separated by 1. The separated luminance component is superimposed with a synchronization signal generated by the synchronization signal generation circuit (11: nF
In the Mt11 circuit 181, the separated color component frame and a pilot burst signal, which will be described later, are superimposed and low frequency converted in the low frequency band [11 circuit 19)K.

The νM Xicho Hui Station component and the low-pass conversion color component are, respectively,
The first and second recording amplifiers (1 (after being amplified by IQLIK,
The signals are summed and derived as a recording signal, which is recorded on videotape.

- In this embodiment, the phase inversion of the color component and the phase inversion of the pilot burst signal are performed by the output of the inversion signal generation circuit a-, and the synchronization signal generation circuit (1)! fiI
m! 3.58MHg of constant phase derived intermittently in cycles
The oscillation output of 21! is generated at the first inverting circuit a3. The output of the fixed oscillation circuit a4 of 4 and 27 MH11 is phase-inverted every 2H only in odd fields and output to the 2-phase inversion circuit-K. and is derived as a low-frequency conversion carrier. Therefore, the inverted signal generator gigI*t
taH, as shown in the waveform diagram of FIG. 2, the vertical synchronization pulse (VP) and horizontal synchronization pulse (HP) generated by the synchronization signal generation circuit 111, as well as the -x synchronization signal, are phase-inverted by a few H spectroscopy. Input the R1 switching pulse (uysv) which becomes high level in an odd number field (for deriving reproduction output), and output the AND output (RE) of the vertical synchronization pulse (VP) and the R1 switching pulse (iy8W). , the horizontal synchronizing pulse (HP) Tr% is divided by two flip-flops 7' (? The logical product output (Q) of the frequency division output (g) and the R switching pulse (RFgW) is used as the control input of the second phase inversion circuit a9 described in II.

Then, the recorded low-pass converted color components are phase-inverted to 2H@ only in the odd-numbered fields, and the phase of the low-pass converted pilot burst signal is inverted every 2H only in the even-numbered fields.

The imaging output recorded in this way is amplified by the preamplifier αe during reproduction, and then input to the reproduction adapter together with the RF switching pulse (RF8W). II3
As shown in the figure, the playback adapter first inputs the playback output t to a bypass filter (L negative) and a 20th bus filter (II), and separates it into an FM light component and a low-frequency conversion color component. The separated FM modulated luminance component is demodulated in the FM demodulation circuit a9 and then amplified in the first buffer amplifier.
After being subjected to high frequency conversion by a high frequency conversion circuit (2) which will be described later, it is amplified by an irises 2 buffer amplifier @. The output of the 1st buffer amplifier (7) is input to the luminance signal processing circuit @ and to the synchronization separation circuit HK%, and its output is input to the vertical synchronization pulse generation circuit ■ and the horizontal synchronization pulse generation circuit mK, and the resulting vertical Synchronous pulse (V'P) a is inputted to the inverted signal generating circuit 4 (described later), horizontal synchronizing pulse (HP) d is inputted to the inverted signal generating circuit (2), the voltage side 5aiii output llu@@, and the synchronous signal generating circuit 4. Ru. - The output of the second buffer amplifier (2) is input to the color component processing circuit (7), and the output of the interphase signal generating circuit 4 is also input to the second phase inversion circuit (b). The luminance component processing @16@ and the color component processing circuit which work in synchronization are as follows:
After inputting the brightness signal (B), blue signal (B), and red signal (6) to the matrix circuit through the level adjustment resistors (RB) and (RR), M'j' is input to the next encoder. 8
As shown in the IF5 diagram, the above-mentioned inverted signal generating circuit @ generates a signal in synchronization with the rotation of the video head and becomes high level in odd fields, just as during recording. R switching pulse (R]1F8W) and vertical synchronizing pulse (o'v
) output of the two-stage 7 lip-flop (yν1) (ν12) is used as the reset input (ill) <fa
t Said second phase inversion circuit for pilot burst inversion-
y IJ Rough 70 Rough' output (d
and RF switching pulse X (!1F8W) (at
Circuit NK is input. The output of the burst gate circuit, which is input on the output of the second phase inversion circuit, is a constant phase intermittent signal including time axis fluctuations of recording and reproduction, and is the &PC reference input of the voltage controlled oscillation circuit (2). Then, an oscillation output sound of 4,27 MH:.2 is derived, which exhibits an oscillation frequency that is 6 times the time axis movement relative to the horizontal synchronizing pulse (HP) that is the PC reference input. This oscillation output is input to the first phase inversion circuit 114 and is 2H in the odd field.
The phase of each signal is inverted and input to the high frequency conversion circuit (2). Therefore, during low-frequency conversion, the odd-numbered converted color components are returned to their original phase in this high-frequency conversion circuit (2), and the cross-daughter components are removed. The μ stator removal circuit is shown, and the color components a and 2 are high frequency converted and have their carriers restored to original 9.
Only the in-phase crosstalk components between 19.2H and the addition of the output via the delay circuit (m) and the phase inverter (v) and the original signal are removed, emphasizing the color components and pilot burst to be reproduced. .

As mentioned above, according to the present invention, the camera body can be replaced by a separate playback adapter, and since the image pickup output tube is recorded and played back, the color temperature and color temperature can be adjusted by using the adjustment means in the playback adapter during playback. Monitor white balance adjustment
You can adjust it while watching V'i, and the effect is great.

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[Brief explanation of drawings]

The figure shows an embodiment of the present invention, in which the first rIA is a circuit block diagram of the 8mm video main body, the second figure is an explanatory diagram of waveforms during wiring playback, and the third figure is a playback adapter circuit and the fourth The figure shows the crosstalk removal circuit diagram in Figure 4 [Respectively - Watou / Explanation of the main figure number (91...Low frequency conversion circuit, c8)...νM conversion circuit 11 circuit, 輺...High range conversion circuit, ([9...PM demodulation circuit.

Claims (1)

[Claims]
ILIIL's FM [modulation output] and [magnetic recording] The VTR unit integrated into the Ilt video camera and the playback output of the mVT1 unit are input, and the low frequency conversion color component is converted into a high frequency fllLFMf modulation luminance signal. [Demodulated and image output] Image signal distribution and playback system consisting of a playback adapter and F, which converts to a television signal after being synthesized.