JPH05128725A - Magnetic recording and reproducing device unified with camera - Google Patents

Abstract

PURPOSE:To perform the digital signal processing of both of camera pictures and reproduced pictures with one field memory by solving the problem that a VTR unified with a camera cannot perform the digital signal processing of reproduced pictures without a private field memory. CONSTITUTION:A switch 4 which switches the analog video signal inputted to an A/D converter 2 to a reproduced picture at the time of reproducing but switches it to a camera picture except at the time of reproducing, a field memory 5 where one field of the digital video signal outputted from the A/D converter 2 is stored, and a memory controller 3 which controls read/ write of the field memory 5 are provided. Thus, the digital signal processing of both of the camera picture and the reproduced picture is performed with one field memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera-integrated magnetic recording / reproducing apparatus (hereinafter referred to as a camera-integrated VTR) having a field memory.

[0002]

2. Description of the Related Art In recent years, as the market for semiconductor memories has expanded, the unit price has been decreasing, and techniques using memories for digital signal processing have been developed and applied. In addition, a digital signal processing technique using a memory has been introduced even in a camera-integrated VTR.

A conventional camera-integrated VTR will be described below. FIG. 2 shows a configuration example of a conventional camera-integrated VTR. In FIG. 2, reference numeral 1 is a camera.
Reference numeral 2 is an A / D converter for A / D converting an analog video signal into a digital video signal. A memory controller 3 controls writing and reading of the field memory 5. A field memory 5 writes the digital video signal input from the A / D converter 2 or reads the already written digital video signal according to a command from the memory controller 3. 6 is D /
The A converter converts the digital video signal into an analog video signal, and outputs the analog video signal.

A camera-integrated VT constructed as described above
The operation of R will be described below. The A / D converter 2 A / D converts the analog video signal output from the camera 1 and outputs it as a digital video signal. The field memory 5 writes the digital video signal output from the A / D converter 2 according to a command from the memory controller 3. At the same time, the field memory 5 also performs a read operation of the digital video signal already stored in the memory according to a command from the memory controller 3. The D / A converter 6 D / A converts the digital video signal output from the field memory 5 into an analog video signal and outputs the analog video signal.

[0005]

However, in the above configuration, since the reproduced video signal cannot be stored in the field memory, there is a problem in that the reproduced video signal cannot be subjected to digital signal processing.

The present invention solves the above-mentioned problems of the prior art. One field memory is used to provide a video signal (hereinafter referred to as a camera image) of a camera and a reproduced video signal (hereinafter referred to as a reproduced image). An object of the present invention is to provide a camera-integrated VTR capable of performing digital signal processing on various kinds of video signals.

[0007]

In order to achieve this object, a camera-integrated VTR of the present invention inputs to an A / D converter for A / D converting an analog video signal into a digital video signal and an A / D converter. A switch for switching an analog video signal to a playback image when playing back, a camera image when not playing, a field memory capable of storing one field of the digital video signal output from the A / D converter, and a field memory Reading,
It is composed of a memory controller for controlling writing and a D / A converter for D / A converting the digital video signal output from the field memory into an analog video signal and outputting the analog video signal.

[0008]

With this configuration, by switching the analog video signal input to the A / D converter with the switch that switches the video signal input to the field memory to the playback image during playback and the camera image when not playing, One field memory can perform digital signal processing on two types of video signals, a camera image and a reproduced image.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a camera. Reference numeral 2 is an A / D converter for A / D converting an analog video signal into a digital video signal. A memory controller 3 controls writing and reading of the field memory 5. Four
Is a reproduced image when the analog video signal input to the A / D converter 2 by a switch is reproduced, and the camera 1 when not reproduced.
Switch to the video signal from. A field memory 5 writes the digital video signal input from the A / D converter 2 or reads the already written digital video signal according to a command from the memory controller 3. A D / A converter 6 D / A converts the digital video signal into an analog video signal and outputs it.

A camera-integrated VT constructed as described above
The operation of R will be described below. First, the switch 4 outputs a reproduced image during reproduction and a camera image during other times. The A / D converter 2 A / D converts the analog video signal output from the switch 4 and outputs it as a digital video signal. The field memory 5 writes the digital video signal output from the A / D converter 2 according to a command from the memory controller 3. At the same time, the field memory 5 also performs a read operation of the digital video signal already stored in the memory according to a command from the memory controller 3. D /
The A converter 6 D / A converts the digital video signal output from the field memory 5 into an analog video signal and outputs the analog video signal.

[0012]

As described above, according to the present invention, an A / D converter for A / D converting an analog video signal into a digital video signal, and an analog video signal input to the A / D converter are reproduced during reproduction and reproduced during reproduction. Other than that, a switch for switching to a camera image, a field memory that can store the digital video signal output from the A / D converter for one field, a memory controller that controls reading and writing of the field memory, and a field By providing a D / A converter that D / A converts the digital video signal output from the memory into an analog video signal and outputs the analog video signal, one field memory can be used for two types of video signals, a camera image and a playback image. , VT with integrated camera capable of digital signal processing
It is possible to realize R.

[Brief description of drawings]

FIG. 1 is a camera-integrated VTR according to an embodiment of the present invention.
Block diagram of

FIG. 2 is a block diagram of a conventional camera-integrated VTR.

[Explanation of symbols]

 1 camera 2 A / D converter 3 memory controller 4 switch 5 field memory 6 D / A converter

Claims (1)

[Claims] 1. An A / D converter for A / D converting an analog video signal into a digital video signal, and a reproduced video signal during reproduction of an analog video signal input to the A / D converter, and a camera image except during reproduction. A switch for switching to a signal, a field memory capable of storing a digital video signal output from the A / D converter for one field, a memory controller for controlling reading and writing of the field memory, and the field memory D / A for D / A converting the output digital video signal to an analog video signal and outputting
A magnetic recording / reproducing apparatus with a built-in camera, comprising a converter.