JPS58194108A - 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 the PCM data and video signals on the same track. CONSTITUTION:The video signal from a camera 1 becomes a signal in which the beginning and the end of one horizontal and vertical scanning period of a picture signal are missing with a signal from a window signal generator 10. The data from input terminals A1-An are A/D-converted and pulse-code-modulated at an encoder 6, only when the picture signal is missing. This signal and the video signal are summed at an adder 3, outputted as a consecutive signal and recorded. The video signal and the PCM signal are separated with each other with the window signal at reproduction, allowing to obtain the video signal and the data signal separately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a data recorder which is designed to be able to record and reproduce video signals simultaneously with data recording and reproduction.

Generally, when recording with various types of data recorders in the field, they are often recorded simultaneously according to the situation YVTRK. Conventionally, a data recorder, VTR, and Y were prepared separately for this purpose, but since these data recorders and V i'R are not synchronized, it is difficult to determine what the status of the reproduced data is at a certain point in time. I was unable to find out whether it was true or not.

The present invention eliminates the above-mentioned drawbacks and provides a data recorder that can generate a data signal and a video signal while maintaining the time relationship between the data signal and the video signal.
This is what we provide.

Hereinafter, one embodiment of the present invention will be described in detail.

FIG. 1 shows a recording system for data signals and video signals, and the basic structure of the recording and front threads is the same as that of Ayachi's VTR. In FIG. 1, reference numeral 1 denotes a video camera, and the video signal from the camera passes through the fast-moving gate 1, 2, and 3111, 3, and is output to terminal 4.
As is well known, a magnetic tape (not shown) is connected to the terminal from the terminal. 5 is a viewfinder, and (No. 1 is supplied from the gate wI2. These cameras 1 and) linder 5 are enclosed in a chain trout and are housed in one case, and are generally video cameras. It is called a turtle.Al v A2 t...
・A is a data input terminal, and the data signal input from this terminal is sent to the Al)i converter B, , H2, -Bn
Therefore, each channel is converted into a digital signal, and the encoder 6 converts it into a <pcu> signal as well known.

The PCM signal converted into PCM by the encoder 6 passes through the processor 3Y and is recorded on the tape Kk2 in the same way as the video signal. 7 is a reference signal oscillator, and the base m from this oscillator is
The signal is supplied to a branching unit 8 and a synchronizing signal generator '#9.

A synchronizing signal from this generator 9 is supplied to the camera l, and a synchronizing signal is supplied to a window signal generator 10, from which the signal is introduced into the gate 2 and the encoder 6. The video signal that has been gated according to the window notes becomes an image signal in which the beginning part and the IP warp part in the horizontal scanning period and vertical scanning period of the video signal are missing, and in the case of a reproduced TV set, it is as shown in Fig. 3. As shown in the figure, only the inner oil surrounded by the edge 12 of the TV field 11 is included. The reference signal 41 from the base fs signal oscillator 7 becomes a sampling pulse through a frequency divider, and the data from the generator is converted into digital data. This Digital 16 Chiha Punishment/Coda 6
Although it will be made into a commercial, a code is added to the correction of the error code, and the 1st encoder b is controlled by the -11 window 01, and the A PCM signal only for the missing period is output. The stiff PCM signal is additionally $63 and the additional gate Kaiyu 2? It is added to the video signal and is led to the output terminal 4 as a continuous (no dropout) @ signal. On the other hand, the gate circuit 27 is stationed to display the video signal.
FG can be seen through the viewfinder 5.

1IA2 shows nasal raw silk, and numeral 13 is an input terminal. This terminal is connected to the record/front thread (from terminal 4 above).
The signal passed through V i") L) The signal is wind-signal generation wheel 17 is Hirojin.
The window signal from the oscillator is gated (
b) Ayu 1b and decoder 15 have 4 people. This gate circuit w116 allows the video signal to pass through except for the period (data period) in which the video signal is missing, and the other period (
The data period) is sent to the gray level, for example, and this reaches the output terminal 18. Further, in the encoder 15, a data signal of a data period is extracted from the reproduced signal, and this is decoded.

Error 1 is corrected and the DA converters C1*C2#...C
It is converted into a 7 analog signal at terminal Dl a D2 +
...1) An nK deday signal is obtained.

Note that although the above embodiment does not mention the processing of color signals in a color VTRK, processing may be performed using the same system as that for video signals.

In addition, as shown in FIG. 4, the scanning plane I of the image pickup tube of the camera l
By widening S1 more than usual and configuring the window part 4 to become a regular scanning surface, the imaging surface 20 can be used effectively.

[Brief explanation of the drawing]

Figure 1 is a block diagram of recycled yarn showing one embodiment of the present invention, Figure #g2 is a block diagram of recycled yarn,
Figure 3 is a front view of the TV screen, and the 4th eldest is the percentage of other embodiments.
It is a positive fiI diagram showing st. 1...Video camera, 2...Gate circuit, 6...
Encoder, 10... Window signal generation %W, 15.
...decoder, 17..herindo-signal generator. % Edende Eclipse Akai Electric Co., Ltd. additional staff Patent attorney Mizu 1) Takesanbe 1st prisoner Figure 3 Figure 4 0

Claims (1)

[Claims] Furthermore, in a device that alternately records a PCM signal converted to 4PeM and a video signal from a video camera, the video signal of the video signal from the video camera is gated with a predetermined window signal, and The data recorder is characterized in that the PCM code is inserted into the removed section to form a continuous signal, and this is used for recording.