JPS62122486A - Still picture telephone set - Google Patents

Abstract

PURPOSE:To attain inexpensively a telephone call while observing a picture by sending the picture through a telephone line. CONSTITUTION:A still picture signal inputted from a picture signal input section 6 is stored in a VRAM 4 and if a voice signal is intermitted, a separation circuit 2 sends a start statement (1 of ii) to allow a video transmission/reception circuit 3 to start sending of a location part (2 of ii) and a picture signal (3 of ii). In this case, the circuit of a handset and the line side are disconnected and when a voice signal is generated in either of the transmission side or the reception side (B of i), the separation circuit 2 detecting the voice signal sends an end statement (4 of ii) and the handset 5 for the transmission side and the reception side is connected. A liquid crystal display 7 gives a display so that both pictures A, B are the same.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the transmission of images over telephone lines.

[Purpose of the Invention] A videophone that allows you to make a call while viewing an image is extremely powerful for communication between one person. However, image signals contain much more information than audio signals, and image transmission is extremely expensive. The present invention allows this image telephone to be carried out at low cost.

[Configuration of Still Image Telephone (Second Claim)] FIG. 1 shows an embodiment of the present invention. A signal sent through a telephone line (1) is separated into an audio signal and an image signal by a separation circuit (2).

The audio signal is received by a handset (5). In addition, the image signal is stored in the VRAM (4) and displayed on the liquid crystal display (7).
The input of one image signal that can be displayed is performed by rolling the image on the CCD with one hand (6).

3 is a video transmitting/receiving circuit.

[Transmission method of images during conversation (Claim 1)] FIG. 2 shows the transmission and reception method of this telephone. As shown in (a), the signal on the line includes an image signal (a+b, c, --) inserted between audio signals (A, B, A, --). (T) indicates an image sent from phone @A to phone @B.

Telephone A started a conversation with (A in A). When the conversation breaks down, (a) sends (a). When telephone B finishes transmitting and borrowing audio, it sends an image signal (a) and (b), completing (tsu).

(C) continues scanning the liquid crystal display. These image information signals are composed of a start declaration section 1, a position section 2, an image signal 3, and an end declaration section 4, as shown in (a).

The still image signal input from FIG. 16 is stored in FIG. 14. When the audio signal is interrupted, Fig. 1 2 sends a start declaration (A-1), and the position part (A-2) is sent to Fig. 1 3.
and starts transmitting the image signal (3). At this time, the circuit of the handset and the line side are disconnected. When a voice signal is generated on either the transmitting side or the receiving side (B in A), the separation circuit that detected the voice signal (in this case, the separation circuit in Figure 1 of telephone B)
) sends a termination declaration (a-4), which connects the transmitter and receiver handsets (FIG. 1, 5).

In (a), the signal of the end declaration part has a higher voltage than l, 2.3. The liquid crystal display (7) displays images so that A and B view the same image.

[Usage of Still Image Telephone (Claim 2) 1] The telephone of this embodiment can send and receive monochrome originals other than 3,006,450-dot photographs. Since this is transmitted at 4800 b/s, the transmission time for one image is approximately 30 seconds. First, speaker A reads a memo or a schematic diagram from FIG. 16 into FIG. 17. This can be confirmed in FIG. 14. Next, speaker A calls telephone B. In the first half of the conversation, send images while giving an outline of the requirements. In the second half of the conversation, A and B talk while looking at the diagram displayed on the liquid crystal display 7.

[Effects] The reliability of ``conversational agreement'' can be improved with the help of images. Since only one image (one photo) is sent, the amount of information to be transmitted is the most cost effective.

[Claim 3rd telephone set] You can send several images while talking.

[Other Examples] Enter the data text created using a word processor into your phone.

Sending ``characters'' requires very little transmission time.

Furthermore, the first claimed method can be used for data communication between personal computers. Information can often be compressed by sending only the ingredients, and you can start a conversation by sending a photo image in advance.

Brief explanation of Figure 40 Figure 1 Still image a Telephone 1: Telephone line, 2: Separation circuit, 3: Video transmitting/receiving circuit,
4: VRAM, 5: Handset, 6: Image signal input section, 7:
Liquid crystal display Figure 2 Image transmission during conversation (A) The signals on the line are audio signals (A, B, A.

-1, A and B indicate two speakers) and an image information signal (a
ybtct-1, b and C (display omitted).

(b) The image signal is the start declaration part of 1.

It consists of a position section 2, an image information signal 3, and an end declaration section 4. (1) is the picture 'Jr(a,b) sent from telephone A to telephone 2.

Claims (1)

[Claims] First (method) is a method for transmitting image signals and audio over the same telephone line. Second, a telephone having a liquid crystal display that displays the image signal sent by the first method. Third, a telephone with a liquid crystal display that connects two lines, one for image signals and one for audio.