JPH02179188A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To record two kinds of video signals in one track by writing each different video signal in a video signal recording part and a sound signal recording part. CONSTITUTION:When an output to a sound signal recording part 4 is selected by switching a changeover switch 2, the output signal from a video circuit 1 is converted to digital image data by an A/D converter 6, its data is stored in a memory 7 and digital data read out of the memory 7 is written in a sound signal recording part 18 on the same track as that of a video signal recording part 17 of a tape 16 in the sound signal recording part 4. A system control part 5 outputs a control signal to a linear track recording part 8 so that whether a signal recorded by the sound signal recording part 4 is sound signal or digital image data can be discriminated, and records a prescribed signal in a linear track part 19 of the tape 16. In such a way, in two kinds of video signals, one signal and the other signal can be recorded separately in the video signal recording part and the sound signal recording part on the same track as that of the video signal, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus that is effective for use in a video tape recorder that records two types of video signals on separate tracks.

2. Description of the Related Art FIG. 4 shows the configuration of a video signal recording system of a conventional video tape recorder, and FIG. 6 shows the configuration of a video signal reproducing system. Fourth
In the figure, 21 is a video circuit for signal amplification, FM, and modulation, and 22 is a video signal recording section for recording the signal from the video circuit 21 on a video tape (not shown). In FIG. 6, reference numeral 23 denotes a video signal reproducing section 24 for reading a video signal from a video tape, and a video signal reproducing section 24 for amplifying and FM demodulating the signal from the video signal reproducing section 23.

As shown in FIGS. 4 and 5, conventional video tape recorders have only one video signal processing method.

Problems to be Solved by the Invention However, with the above conventional configuration, only one type of video signal can be recorded, so two types of video signals are recorded, and when played back, the two types of video signals are combined and output as one screen. I couldn't do it.

In view of the above-mentioned problems, the present invention provides a magnetic recording and reproducing device that can record and erase two types of video signals separately, and can synthesize and output the two types of video signals during playback. .

Means for Solving the Problems In order to solve the above problems, the present invention provides an A/D converter that converts an input analog image signal into digital image data, and an audio signal portion on the same track as the video signal. The first recording means for recording the data and the second recording means for recording the control signal for controlling the data of the audio signal portion on the linear track section. A device comprising means for detecting a control signal, a D/A converter for converting the signal output from the audio signal portion into an analog signal, and a means for synthesizing the analog signal and the reproduced video signal based on the control signal. It is.

According to the above-described configuration, the present invention separately sends one of the two types of video signals to the video signal recording portion and the other signal to the audio signal recording portion on the same track as the video signal during recording. The video signal is recorded, and during playback, two types of playback video signals are combined and output.

Example 1 and 2 show a video signal recording circuit of the present invention.

FIG. 3 is a block diagram showing one embodiment of the reproducing circuit, and is a format diagram of a tape track. In Figure 1,
A video circuit 1 performs predetermined processing such as amplification and FM modulation of an input image signal. The processed input image signal is output to either the video signal recording section 3 or the audio signal recording section 4 via the changeover switch 2. Switching of the changeover switch 2 is performed through the system control section 6 by a switching input. When the image signal is outputted to the video signal recording section 3 by switching the changeover switch 2, the image signal is written to the video signal recording section 17 of the tape 16 as in a conventional video tape recorder. Furthermore, when output to the audio signal recording section 4 is selected by switching the changeover switch 2, the output signal from the video circuit 1 is first converted into digital image data by the A/D converter 6, and the data is stored in the memory. The digital data stored in the tape 16 and read out from the memory 7 is written in the audio signal recording section 4 to the audio signal recording section 18 on the same track as the video signal recording section 17 of the tape 16.

In addition to switching whether to output the input image signal to the video signal recording section 3 or the audio signal recording section 4, the system control section 5 also determines whether the signal recorded by the audio signal recording section 4 is an audio signal. , a control signal is output to the linear track recording section 8 so that it can be determined at the time of reproduction whether it is digital image data, and a predetermined signal is recorded on the linear track portion 19 of the tape 16. Although the changeover switch 2 is provided after the video circuit 1, the present invention is not limited to this.
．． It is also possible to perform switching control to select whether or not to record in the audio signal recording section 4.

Next, an embodiment of the video signal reproducing circuit shown in FIG. 2 will be described. In FIG. 2, the signal reproduced by the linear track reproduction section 9 that reproduces the linear track portion 19 of the tape 16 is input to the system control section 5, and the signal reproduced by the audio signal reproduction section 10 is an audio signal. Determine whether there is or is Digimol image data. If the result of the determination is that it is an audio signal, the output from the audio signal reproducing section 1o is output to the audio circuit 11, and the output from the audio circuit 11 is used as the audio signal output. On the other hand, if the determination result is digital image data, the output of the audio signal reproduction section 1o is stored in the memory 12, and the output from the memory 12 is converted into an analog image signal by the D/A converter 13. The signal output from the video signal reproducing section 14 and the signal output from the D/A converter 13 are combined by a video circuit 16 and output as a video signal.

As described above, according to this embodiment, the video signal recording portion 17
By writing separate video signals to the audio signal recording section 18, two types of video signals can be recorded on one track, and the control signal recorded in the linear track section 19 selects the image output during υ playback. can do.

Note that although this embodiment has described reproduction, it is also possible to erase instead of recording, and the video signal recording portion 1
7. It goes without saying that the audio signal recording section 18 may be configured so that two types of video signals may be recorded or erased independently of each other.

Effects of the Invention As described above, according to the present invention, two types of video signals can be recorded and erased independently of each other, and when playing back, the two types of video signals can be combined and output. Above all, it is extremely useful.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a video signal recording circuit according to an embodiment of the present invention, FIG. 2 is a block diagram showing a video signal reproducing circuit according to an embodiment of the present invention, and FIG. 3 is a block diagram showing a video signal reproducing circuit according to an embodiment of the present invention. Format diagrams, FIGS. 4 and 5 are block diagrams showing conventional video signal recording circuits and reproducing circuits. 1... Video circuit, 2... Changeover switch, 3... Video signal recording section, 4... Audio signal recording section, 6°°...・System control unit, 6...
...A/D converter, 7.12...Memory,
8...Linear track recording section, 9...
Linear track playback unit, 1o...Audio signal playback unit, 11...Audio circuit, 13...
・D/A converter, 14...Video signal reproducing section, 1
6...Video circuit.

Claims (2)

[Claims] (1) An A/D converter that converts an input analog image signal into digital image data, a memory section for storing the digital image data output from the A/D converter, and an output from the memory section. a first recording means for recording the digital image data to be recorded on the audio signal portion on the same track as the video signal; and a control signal for discriminating the data recorded by the first recording means to the linear track section. 1. A magnetic recording/reproducing apparatus comprising: second recording means for recording. (2) Means for detecting the control signal recorded in the linear track section during playback, means for storing the signal output from the audio signal section in the memory section, and converting the digital output signal from the memory section into an analog signal. a D/A converter, and means for synthesizing and outputting an analog signal output from the D/A converter and a reproduced video signal; A magnetic recording/reproducing device characterized in that it combines an output signal and a reproduced video signal.