JPS63142790A - Television interphone device - Google Patents

Abstract

PURPOSE:To efficiently use a limited semiconductor memory by inhibiting to write a picture information in an address memory corresponding to a picture desired to be stored, and storing it in the rest of the address memory, when the picture information picked up by a television camera, is recorded in the semiconductor memory device. CONSTITUTION:The output of a recording address decision circuit 23, which is successively written in every address memory 14B... of the semiconductor memory device 14, is supplied to a discrimination circuit 24, and is compared with the output from a stored picture address decision circuit 28, and the output of the discrimination circuit 24 is added to the input of the recording address decision circuit 23, and the write-in to the address memory which corresponds to the address determined by the stored picture address decision circuit 28, is inhibited. This is determined by that the output of the recording address decision circuit 23 is supplied to the semiconductor memory circuit 14 by a gate 25, controlled by the inverted signal of the output from the decision circuit 24 by an invertor 26. Thus, because the optional picture, desired to be stored, remains and the newly picked-up picture is successively stored in the other address, the storing device with a limited small capacity can be used effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a television intercom device that selectively records image information captured by a video camera.

BACKGROUND OF THE INVENTION Conventionally, image information captured by a surveillance television camera has been recorded by a recording device such as a video tape recorder for later examination and confirmation. In recent years, a type of surveillance device using a TV camera has become a TV intercom system that uses a TV camera placed on the side of the intercom slave set at the entrance or gate, and checks for visitors using a receiver set on the base unit indoors. has been made into

For example, in this intercom device as well, it is advantageous to record image information captured by a television camera while the user is away, in order to confirm the presence of visitors or the presence or absence of suspicious persons.

Problems to be Solved by the Invention To achieve this, it is possible to record the output of a television camera on a video tape recorder as in the past, but this requires a large-scale device.

To solve this problem, a semiconductor memory device (RAM) may be used as the storage device, but the amount of information stored therein is much smaller than that of a video tape recorder.

The present invention selectively extracts and records more effective images in a semiconductor memory device which is a small capacity storage device, and records 1-1 and 8
1) It is an attempt to make effective use of the half-way pointless device of the customer zone.

Means for Solving the Problems In order to solve the above problems, the monitoring device of the present invention selectively extracts image information captured by a television camera and stores it in a semiconductor storage device. It is characterized in that any image stored in the memory can be saved, and a new image can be stored in place of the remaining stored images.

Effects According to the above configuration, images that are desired to be saved are left behind, and newly captured images are sequentially stored in other address memories, so that limited small-capacity storage devices can be used effectively. It is.

Embodiment Hereinafter, one embodiment of the monitoring device of the present invention will be described with reference to the drawings.

In FIG. 2, 1 is a slave unit of the television intercom, and 2 is its base unit. On the handset 1 side, there is a television camera 3 with an automatic focus control device, a microphone 4.
A speaker 6 and a call button 6 to be pressed by a visitor are provided; The control circuit 9 is connected to the control circuit 9 of the base unit 2, and the monitor receiver 8. A microphone 1o and a speaker 11 are connected, and by operating the operation button 12 on the R machine side, voice communication between the base unit 2 and handset 1 and image projection on the monitor receiver 8 can be performed in the same way as with conventional intercom devices. is configured so that it can be controlled.

The above configuration is basically the same as that of a conventional television intercom.

This embodiment differs from the conventional configuration in the following points. A part of the output of the television camera 3 is applied to the semiconductor storage device 14 via the digital/digital converter 13, and the readout output of the semiconductor storage device 14 is applied via the digital/digital converter 16 and the switching circuit 7. is applied to the monitor receiver 8.

The control circuit 9 also has a read button 16 for reading out images stored in a plurality of address memories of the semiconductor storage device 14.
．． It has a save button 17 for instructing to save the read image.

Recording and reading of images in the semiconductor memory device 14 will be explained with reference to FIG. 1.

When the call button 6 is pressed in a state where no data is stored in the semiconductor storage device 14, the gate pulse generator 22 outputs a pulse signal equivalent to one field, and the gate 21 is activated. be opened. this gate 2
1, image information from the television camera 3 is input to the semiconductor storage device 14. The video output at that time is stored in the memory 14 at address 1 of the semiconductor storage device 14 shown in FIG. In response to the operation of the call button 6, the output from the recording address determination circuit 23 consisting of a ring counter is sent to the gate 2.
5 to the semiconductor memory device 14 for sequential address setting, they are sequentially written to each address memo 9-14B . . . of the semiconductor memory device 14. Output route of the recording address determination circuit 23 @lI;! +ITRI071
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The output of the discriminator circuit b4 is compared with the output from the +work W reasonable decision circuit 28 and added to the input of the recording address decision circuit 23, so that the address corresponding to the address decided by the storage screen address decision circuit 28 is determined. Writing to battery memory is prohibited. This means that the output of the recording address determining circuit 23 is the output of the determining circuit 2.
It is determined by applying the output from 4 to the semiconductor memory circuit 14 by a gate 26 controlled by a signal inverted by an inverter 26.

During reading, the read address determining circuit 27 is activated every time the read button 16 is pressed, and the addresses are sequentially switched.

When the save button 17 is pressed during this reading, the playback address at the time of the press is stored in the save screen determination circuit 28.

This is a maximum of 4 screens. This save screen determination circuit 2
The address stored in 8 is sent to the control circuit 24 to which the output of the recording address determination circuit 23 is added, and by inputting the output of this discrimination circuit 24 to the storage address determination circuit 23, the address stored in υ is determined to correspond to the storage address. The recording address determination circuit 23 is designed to automatically skip that address and move on to the next address.

That is, it cannot be recorded in the address memories 14A to 14Z corresponding to the address stored in the save screen determination circuit 28.

The address stored in the save screen determining circuit 28 is erased when the save button 17 is pressed while the read address determining circuit 27 consisting of a ring counter is at that address.

In this way, images recorded in a plurality of address memories 14 to 14Z of the semiconductor memory device 14 can be saved and rewritten to the remaining address memories, thereby making it possible to improve the effectiveness of the semiconductor memory device 14.

Effects of the Invention As described above, the television intercom device of the present invention, when recording image information captured by a television camera in a semiconductor storage device, prohibits writing to the address memory corresponding to the screen to be saved, and saves the remaining address memory. By storing data in the memory, limited semiconductor memory can be used efficiently, which is extremely advantageous in practice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of essential parts of a television intercom device according to an embodiment of the present invention, FIG. 2 is an overall block diagram of the same device, and FIG. 3 is a block diagram of a semiconductor memory device used in the same device. 1... Television intercom handset, 2...
...TV intercom base unit, 3...
・TV camera, 4...Microphone, 5...
...Speaker, 6...Call button, 7...
...Switching circuit, 8...Monitor receiver, 9.
... Control circuit, 10 ... Microphone, 11.
...Speaker, 12...Operation button, 13.
...Music/D converter, 14...Semiconductor storage device, 14A to 14Z...Address memory, 15
...D/A converter, 16...Read button, 17...Save button.

Claims (1)

[Claims] When image information captured by a television camera is selectively stored in multiple address memories of a semiconductor storage device, any image recorded in the semiconductor storage device is saved and a new image is stored in place of the remaining stored images. 1. A television intercom device characterized by comprising address setting means capable of recording images.