JPH0346884A - Still image video telephone device - Google Patents

Abstract

PURPOSE:To eliminate such trouble that a transmission button needs pressing several times at the time of transmission by providing an image information storage part with 1st and 2nd VRAMs and switches which switch those VRAMs between a line and an image display part. CONSTITUTION:While information received from a line 1 is stored on the 1st VRAM 91 connected by a switch 93, the information is converted by a D/A converting means 10 into analog information by a switch 94 connected to the 1st VRAM 91 and the analog information is displayed on a CRT 11. After initial image reception, an image control part 8 connects the switch 93 to the 2nd VRAM 92. When 2nd image information is received, the information is stored on the 2nd VRAM 92 connected by the switch 93. when the 2nd image reception is finished, the image control part 8 connects the switch 94 to the 2nd VRAM 92, so the images are switched.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a still image video telephone device in which image information received from a communication line is stored in a video information storage element (VRAM) and displayed on an image display unit. Regarding.

[Conventional technology]

Conventionally, this type of still image videophone device has a configuration in which image information received from a communication line is stored in a VRAM, and the stored image information is displayed on an image display unit such as a cathode ray tube (CRT). Further, in this image display section, images to be displayed are manually transmitted and received one by one, and the displayed images are gradually displayed from the top of the image display section by image scanning.

[Problem B to be solved by the invention] In the conventional still image videophone device described above, when the sender presses the send button, one image is sent. There is the annoyance of having to do it. Further, since the receiving side gradually appears from the top of the image at the same time as the image data is received, there is a problem that it becomes an eyesore if the receiving side receives the image data continuously.

It is an object of the present invention to provide a still image videophone device that solves these problems.

(Means for Solving the Problems) A still image videophone device of the present invention includes first and second VRAMs in an image information storage section that stores image information transmitted and received through a line, and these VRAMs connected to the line. and a switch for switching between the image display section and the image display section.

By switching these switches, the first
and a second VRAM can be selectively and alternately connected to the line and the image display section.

[Effect]

In this configuration, in the first period of image information reception, the first
Image information is stored in the VRAM of the computer and displayed. In the next second period, the display continues and the next received image information is stored in the second VRAM. In the next third period, the image information stored in the second VRAM is displayed, and the next received image information is stored in the first VRAM.

By repeating this, image information is stored sequentially.

Displays alternately.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the still picture video telephone device of the present invention. In the figure, line 1 is connected to communication means 2.
The line connected to the line includes a key power section 3 that instructs image transmission, a central processing unit (CPU) 4 that controls this key power section 3, and a camera 5 that inputs images.
A read/write storage device (RAM) 7 as a storage unit for transmission image information connected to an A/D conversion means 6 for converting image analog information manually inputted from a computer into digital information, an image control unit 8, and a reception image It is connected to an image information storage unit 9 that stores information.

Connected to this image information storage section 9 are a D/A conversion means 10 for converting image digital information into analog information, and a CRT II for displaying images.

The image information storage section 9 also stores the received image information by switching between a first VRAM 91 that stores image information, a second VRAM 92 that similarly stores image information, and these two RAMs 91.92. It includes a switch 93 for instructing VRAM, and a switch 94 for instructing VRAM to display an image.

Next, the operation of the video telephone device having the above-described configuration will be explained.

The period for transmitting and receiving images is, for example, 8 seconds. First, the transmitting side will be explained.

When the transmission key is input by the key human power unit 3, the CPU 4
, and starts image processing from camera 5. camera 5
The still image analog information manually inputted from the A/D conversion means 6 is converted into digital information, and then stored in the RAM? is stored in

The CPU 4 uses the communication means 2 to transmit the information stored in the RAM 7 to the other party through the line 1. Thereafter, images will be transmitted every 8 seconds.

On the other hand, on the receiving side, the switch 93 and switch 94 of the image information storage section 9 are connected to the first VRAM 91 by the image control section 8 before receiving the initial image.

Then, the information received from the line 1 by the communication means 2 is transferred to the first VRAM 91 connected by the switch 93.
At the same time, the D/A conversion means 10 converts the data into analog information using the switch 94 connected to the first VRAM 91, and displays it as CR"r'll.

FIG. 2 shows an example of an image displayed on the CRT II. When the initial image is received, it is gradually displayed from the top as shown in Figure 2 (a), and after the image reception is completed, it is displayed as shown in Figure 2 (b).
become that way.

After receiving the initial image, the image control unit 8 connects the switch 93 to the second VRAM 92. When the second image information is received, the second VRAM connected by the switch 93
However, since the switch 94 is connected to the first VRAM 9°1, the image displayed on the CRTII remains as shown in FIG. 2(b).

When the reception of the second image is completed, the image control section 8 switches the switch 94 to
is connected to the second VRAM 92, so the image is as shown in Figure 2 (b).
) to Fig. 2(c).

Thereafter, the switch 93 for specifying the VRAM that stores the received information is connected to the VRAM side to which the display VRAM specifying switch 94 is not connected. Therefore, the image display changes instantaneously every 8 seconds.

[Effects of the Invention] As explained above, the present invention provides a first
and a second VRAM, and a switch for switching these VRAMs between the line and the image display section, so that image information can be selectively and alternately stored in the first and second VRAMs. , and can be displayed, eliminating the trouble of having to press the send button many times when sending. In addition, on the receiving side, since the display changes after the image information is received after the 200th screen, it is possible to prevent the image from gradually appearing from the top of the screen and becoming an eyesore.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 (
a) to (C) are diagrams showing states of image display. l... Line, 2... Communication means, 3... Key human power section, 4... CPU, 5... Camera, 6... A/D conversion means, 7... RAM, 8 ...Image control section, 9...
・Image information storage unit, 10...D/A conversion means, 1
1...CRT (display unit), 91...1st VRAM
, 92...second VRAM. 93.94...Switch.

Claims (1)

[Claims] 1. In a still image video telephone device that transmits and receives image information captured by a camera through a line, stores this image information in an image information storage section, and displays it on an image display section, the image information storage section includes a The first and second image information storage elements are provided with switches for switching these storage elements between the line and the image display section, and the switching operation of these switches causes the first and second image information storage elements to be switched. 1. A still image videophone device characterized in that the device is configured so that the device can be alternately switched and connected to a line and an image display unit.