JPS58194107A - Data recorder - Google Patents

Abstract

PURPOSE:To reproduce a data signal and a video signal while keeping the relation of time at recording, by recording PCM data and video signals on the same track. CONSTITUTION:A picture signal is eliminated from the video signal from a camera 1 at a gate circuit 2 at each horizontal synchronizing period of integer numbers. Digitized input signals from input terminals A1,-An are pulse-code- modulated at an encoder 7 for a period only when the picture signal is eliminated, and a modified video signal where the picture signal and the PCM signal exist alternately is obtained from an adder 8. The signal is recorded on a tape 6 after frequency modulation. The video signal only is extracted at reproduction to form a consecutive signal by interpolating the video signals delayed before during the PCM signal reproducing period where the video signal is missing, and the PCM signal is extracted independently, allowing to reproduce both signals while keeping the relation of time at the recording.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a data recorder that is capable of recording and reproducing video signals at the same time as recording and reproducing data.

Generally, when recording outdoors using various types of data/sound data recorders, the situation
Therefore, it is often recorded. Conventionally, a data recorder, VTR, and t were used for this purpose, but since these data recorders and VTI are not synchronized, it is impossible to know what the status of the reproduced data is at a certain point in time. It was warm and time-wise & [I couldn't know.

The present invention eliminates the above-mentioned drawbacks and provides a data recorder that can reproduce a data signal and a video signal while substantially maintaining the time relationship between the data signal and the video signal when they are arranged. .

Hereinafter, one embodiment of the present invention will be explained in detail with reference to the drawings. w, 1- indicates the wiring system between the data signal and the video signal, and the basic configuration is the well-known V '1'' R
is the same as that of In FIG. 1, the symbol l is a well-known video camera, and the video @ from the camera is passed through a gate circuit 2 and an adder 3, which will be described later, and a well-known FLI.
4 converter 4 converts to FM, (distribution) head 5 converts to VT
@ Al e placed on the magnetic tape 6 as is well known in R
A2 #...113 is a data input electron, and the data signal input from this electron is sent to the AD converter B1 e
B2 m・-BnK converts each channel into a digital signal, and the encoder 7 converts it into a digital signal as well known (PCM
be converted into PCM converted into PCM by encoder 7
The signal is supplied to the adder 311 through the adder 8, which will be described later, and is recorded on the tape 6 by the head 5 through the FM converter 4Y. , 9 is a reference signal oscillator, and the reference signal from the nuclear oscillation gain is sent to a synchronization signal generator 10. data interval discrimination signal generator 1] and frequency divider 612. The synchronization signal generator IO generates a synchronization signal based on the reference signal, and this! When the video camera IK is supplied, the horizontal synchronizing signal is supplied to the frequency divider 13, and a signal according to a predetermined division ratio is obtained. This signal is supplied to a gate circuit 2 and an encoder 7, and in the gate circuit 2, the video signal is removed every K (video signal) every 5 integer horizontal synchronization periods as shown in FIG. 3, and in the encoder 7, A PCM signal that exists only during the period in which the video signal is removed is obtained. In Figure J1!3, (a) shows the video signal before being gated by the gate circuit 2, and (b) shows the video signal from which the video signal has been removed every horizontal interval by the gate circuit 2. It shows. Symbols 1 and 2 indicate a video signal, b a color burst signal, and C a four-horizontal signal. Further, the output of the dividing period 12 becomes a sampling pulse for AD conversion.

on the other hand,! II, m! The output from 9 is supplied to the data interval discrimination OI signal generation allK as described above, and the output of the divider 13 is also supplied to this generation fill, which corresponds to the period in which the video signal arranged in LLN is removed. A discrimination signal is obtained only for the horizontal synchronization signal bank porch section. This discrimination signal consists of a burst signal consisting of a frequency higher than the upper limit of the low frequency conversion color signal separation filter (color signals are recorded and played back after being low frequency converted).
, is added to the PCN No. 411 at the addition aSS, and this is introduced into the adder 3 described above, and from the adder, the image g1
An R-type video signal is obtained in which the ``Gago'' and the PCM signal ``'' are present alternately, and the above-mentioned discrimination signal is added. This modified video signal passes through the FM modulator 4 and is distributed to the same track on the tape 6 by the head 5.

FIG. 2 shows the reproduction of data signals and video signals. The modified video signal reproduced from the tape 6 by the (reproduction) head 5 is demodulated by the demodulator 14, and is converted into a luminance signal (Y signal). component and a color signal (C signal) component are extracted separately. These Y signal and C@ signal are delayed by respective delays 1ii 115 and 16 during the period during which the video signal is absent, are added by an adder 17, and are supplied to a gate circuit 18.

On the other hand, the signal before passing through the delay @15.16t' is also added to the adder 19.
are added and supplied to the gate circuit 18.

In the gate circuit 18, the signal from the adder 17.
The LILJ II signal passes through the circuit alternately, and during periods when the video signal is absent, a delayed video signal is inserted and output as a continuous video signal from the electronic power source. From the Y signal, only the burst signal, which is a discrimination signal, is extracted by burst sampling, and this is converted into a discrimination signal by the sII circuit and sent to the gate circuit 18 and the decoder. Also y(
Iir is introduced into this decoder, and the data correction required only for the PCM signal is performed by the above-mentioned discrimination signal, and l)
A converters C□, C2゜...Cn each convert into 7 analog data signals, and each data signal is connected to terminal D1.
e B2 *...Output from Dn.

In the above implementation, a data section discrimination signal was added to the color burst section, but it is also possible to detect the presence or absence of a color burst and use this as a separate signal for discrimination.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a recording yarn according to an embodiment of the present invention, FIG. 2 is a block diagram of a regenerated yarn, and FIG. 3 is a signal waveform diagram. l...Video camera, 5...Head, 6...Magnetic tape, 7...Encoder, 15.16...Delay line. % Nyoto Kende Representative of Akai Densho Co., Ltd. Masuji Mizu Ide Takesanbe

Claims (1)

[Claims] means for converting the data into YPCM, means for alternately converting the PCM signal from the wrinkle means and the video signal from the video camera, means for reproducing these signals, and converting only the video signal of the reproduced signals into Y 5-j of the above-mentioned signal reproduced; means for obtaining a continuous video signal Y by inserting the previous delayed video signal Y during the reproduction period of the PCM signal in which the video signal is missing, and 5-j of the reproduced signal; A data recorder having means for extracting data and recording the Pe'M data and video signal on the same track.