JPH03190484A - Interface adaptor device - Google Patents

Abstract

PURPOSE:To use a still picture television telephone set by connecting a possessed telephone set and a television receiver via an interface adaptor. CONSTITUTION:A transmission picture signal storage section 3 writes a picture signal from a television camera, and a separate control section 6 modulates a transmission signal when the transmission signal is inputted from a telephone set 62 and modulates a transmission picture signal from the transmission picture signal storage section 3 when no transmission signal is inputted respectively and sends the modulated signal to an opposite party via a line. Moreover, the input signal from the line is separated into a reception signal and a reception picture signal, the former is sent to the telephone set 62 and the latter is sent respectively to the received picture storage section 4 respectively. Then the reception picture storage section 4 writes the inputted reception picture signal and reads the reception picture signal written in one preceding pattern, converts the signal and displayed on a television receiver 61, and the telephone set 62 converts the reception signal into a voice and sends it. Thus, the telephone set and the television receiver are used to form a television telephone set.

Description

[Detailed Description of the Invention] [Summary] For example, the purpose of this invention is to enable an interface adapter device used for a still image videophone to be used as a videophone by using an existing telephone and a television receiver. , When using a television receiver and a telephone as a still image video telephone, 1. The image signal from the television camera is written and read out, and the transmitted image signal storage part and the input received image signal are written, After being read out, the reception image signal storage part converts and sends it out so that it can be displayed on the television receiver, and when the transmission signal from the telephone is input, the transmission signal is When no input is made, the image signal from the transmitted image signal storage section is sent to the line, and when a signal is input from the line, the received signal and received image signal are separated from the input signal, and the received image signal is sent to the telephone. and a separation/control section that sends the received image signal to the received image storage section.

[Industrial Application Field] The present invention relates to an interface adapter device used, for example, in a still picture video telephone.

Even if you currently own a telephone and television set,
When using a still picture video phone, you must replace your existing phone with this video phone.

For this reason, there is a desire to be able to use an existing telephone and television receiver as a videophone.

[Conventional technology]

FIG. 4 shows a block diagram of a conventional example.

In the figure, an image signal from a television camera (hereinafter abbreviated as TV camera) 11 that photographed a subject (i.e., a subscriber) is converted into a digital signal by an analog/digital converter 12, and then written into a nine-image memory 13. .

Note that this image memory is composed of two surfaces, each having a capacity for one screen, and a digital signal is written to one surface, and a digital signal from one screen before is read from the other surface.

Also, when a subscriber speaks into the microphone.

The audio signal to be transmitted, that is, the transmission signal is sent to the amplifier 16.
The signal is amplified and applied to the detector 17 and the modulation/demodulation section 27. The detector detects the presence or absence of a transmit signal, and sends a detection signal corresponding to the detection result to the transmission control section.

Since the transmission control section 14 has a small line capacity, it does not transmit the image signal and the audio signal at the same time, and when a detection signal indicating the presence of a transmission signal is input, it blocks the passage of the image signal and transmits the transmission signal and the transmission signal. When there is no modulation/demodulation part 2 of the image signal
Send on 7.

Please explain whether the same processing is performed on the transmit signal and the image signal in the modulation/demodulation part. > As a result, the transmitting signal and the image signal are analog modulated and sent to the line.

Next, the signal input via the line is demodulated in a modulation/demodulation section 27 and then separated into a received signal and a received image signal in a one-separation section 24 . The reception signal (received audio signal) drives the speaker 26 via the audio amplifier 25.

Further, the received image signals are sequentially written into one of the image memories 23, but the image signals written into the other memory are read out. The read image signal is converted into an analog signal by the digital/analog converter 22 and displayed on the nine display section 21.

[Problem to be solved by the invention]

Here, there is a problem in that in order to make a call using a still image video telephone, the user must replace the telephone he or she owns with a still image video telephone.

Note that there are cases where the still image is not satisfied because the screen on which it is displayed is small.

An object of the present invention is to enable the user to use his own telephone and television receiver as a videophone.

[Means to solve problems] FIG. 1 shows a block diagram of the principle of the present invention.

In the figure, numeral 3 is a transmission image signal storage portion into which an image signal from a television camera is written and read out, and numeral 4 is a storage portion into which an input received image signal is written.

This is a received image signal storage part that, after being read out, is converted and transmitted so as to be displayed on the television receiver.

Further, when a transmitting signal from the telephone is input, 5 sends the transmitting signal to the line, and when no transmitting signal is input, the image signal from the transmitting image signal storage part is sent to the line, and the signal is sent from the line. is a separation/control section that separates a received voice signal and a received image signal from the input signal and sends the received voice signal to the telephone and the received image signal to the received image storage section.

[Effect]

The present invention allows a user to connect his/her own telephone and television receiver via an interface adapter device so that the telephone can be used as a still picture video telephone.

That is, the transmission image signal storage section writes the image signal from the television camera.

On the other hand, the separation/control section modulates the transmit signal when the transmit signal is input from the telephone, and the transmit image signal from the transmit image signal storage section when the transmit signal is not input, and modulates the transmit image signal through the line. and send it to the other party.

Furthermore, after the input signal from the line is separated into a received signal and a received image signal, the former is sent to the telephone and the latter is sent to the received image storage section.

Therefore, the reception image storage section writes the input reception image signal, reads out the reception image signal written one screen before, converts it and displays it on the television receiver, and the telephone converts the reception signal into audio. and send it.

〔Example〕

FIG. 2 is a block diagram of an embodiment of the present invention, and FIG. 3 is an example (front view) of the configuration diagram of FIG. 2.

Here, television camera 31. The analog/digital converter 321 image memory 33 is a component of the transmission image signal storage section 3, and the television interface section 41.
The digital/analog converter 429 and the image memory 43 are components of the received image signal storage section 4, the transmission control section 51.
An input/output switching section 521, a separation section 53, and a modulation/demodulation section 54 indicate the constituent parts of the separation/control section 5. The operation shown in FIG. 2 will be explained below.

First, an image signal obtained by photographing a subject (that is, a subscriber) by a television camera 31 is converted into a digital signal by an analog/digital converter 32 and sequentially written into an image memory 33.

Note that this image memory is composed of two sides, each having a capacity for one screen as in the conventional example, and while digital signals are written on one side, digital signals from one screen before are read out from the other side.

At this time, in response to this reading, the digital signal written from one side is transferred to the other side, and a new digital signal is written.

Further, a transmission signal from the telephone 62 is sent to the transmission control section 51 via the input/output switching section 52 switched as shown by the dotted line. Here, the input/output switching section 52 is.

For example, a detector (not shown) is provided for detecting the state of the telephone handset. 1. Normally it looks like a solid line, but suppose it becomes like a dotted line when the handset is disconnected.

Now, the transmission control section 51 has a built-in separate detector (not shown) that detects whether or not a transmitting signal is input, so when it detects a transmitting signal input, a signal like the dotted line appears. After switching to the connection, the input transmission signal is sent to the line via the modulation/demodulation section 54.

However, when it is not detected, it is switched as shown by the solid line, so the image signal of the previous screen written in the 9-image memory is read out and sent to the line via the modulation/demodulation section in the same manner as above.

Next, the input signal from the line is demodulated in a modulation/demodulation section 54, and then separated into a received signal and a received image signal in a one-separation section 53, and the former is sent to the telephone via an input/output switching section 52, which is switched as shown by the solid line. At 62, the latter is sent to the image memory 43. Therefore, the reception signal is converted into voice by driving the handset in the telephone.

Further, the received image signals are sequentially written into one memory in the image memory 43, but the already written received image signals are read out from the other memory.

After being converted into an analog signal by the digital/analog converter 42, the signal is converted into a signal that can be displayed on a television receiver by the television interface section 41, and sent to the television receiver 61 to be displayed on this receiver. .

Incidentally, FIG. 3 shows an external view (front view) of a television telephone set using a telephone, a television receiver, and the interface adapter device of the present invention.

As shown in the figure, the screen that displays still images has become larger.

In other words, you can use your own telephone and television receiver as a videophone.

〔Effect of the invention〕

As explained above in detail, one advantage of the present invention is that it becomes possible to use an existing telephone and television receiver as a videophone.

[Brief explanation of drawings]

Figure 3 is an external view (front view) of Figure 2. FIG. 4 shows a block diagram of a conventional example. In the figure, 3 is a transmission image signal storage part; 4 is a received image signal storage part; 5 is the separation/control part, 61 is a television receiver, No. figure Fig. 2 Tato view (front view) Figure 3 Unprecedented Principle Arotsuku Diagram No. (Fig. Conventional allograph diagram Figure 4

Claims (1)

[Scope of Claims] A transmission image signal storage portion into which image signals from a television camera are written and read out when a television receiver (61) and a telephone (62) are used as a still image video telephone. (3) A reception image signal storage part (4) where the input reception image signal is written and read out, converted to be displayed on the television receiver, and sent out; When a signal is input, the transmit signal is sent to the line, when the transmit signal is not input, the image signal from the transmit image signal storage part is sent to the line, and when the signal is input from the line, the receive signal is output from the input signal. An interface adapter device characterized in that it has a separation/control part (5) that separates the received call signal from the telephone and the received image signal, and sends the received call signal to the telephone set and the received image signal to the received image storage part.