JPH05227331A - Videophone equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] ISDN basic interface (2B + D)
With respect to the video telephone device that connects to the other party's video telephone device 10 through one of the information channels and exchanges image and voice information, it searches for necessary documents and database information stored in the host computer connected to the ISDN. , The purpose is to provide a videophone device that can be sent to and displayed on the other party's videophone device. [Structure] Connection means 1 for connecting to a host computer 11 connected to ISDN through another information channel, and information from the host computer 11 connected by the connection means 1 for searching information by the other party The configuration is such that the search and transmission means 2 for transmitting to 10 is provided.

Description

Detailed Description of the Invention

[0001]

The present invention relates to one information channel of an ISDN basic interface (2B + D) (hereinafter, two information channels are referred to as B ₁ CH and B ₂ CH, one of which is referred to as B ₁ CH). Connect to the other party's videophone device at
The present invention relates to a videophone device capable of transmitting and displaying document and database information stored in a host computer connected to the ISDN to the counterpart videophone device.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional videophone system, and FIG. 4 is a block diagram of a conventional videophone system.

In FIG. 4, 20 is a processor for controlling the entire videophone device, 21 'is a memory for storing programs of the processor 20 and various state management tables, and 2
Reference numeral 2'denotes an image display control unit that controls image input from the camera and display control on the CRT, and 23 indicates an image CODEC that controls compression of image data from the camera and expansion of received image data.
25 is a high level data link control (hereinafter referred to as HDLC) for transmitting and receiving image data of the partner video telephone device.
HDLC for converting / restoring to the
Reference numeral 24 denotes a direct memory access control unit (hereinafter referred to as DMAC) that controls data transfer between the memory 21 ′ and the image display control unit 22, and between the memory 21 ′ and the HDLC unit 25.
Is a demultiplexing unit that demultiplexes 16 Kbps voice and 48 Kbps image and enables an interface with an information channel of 64 Kbps. 27 compresses the voice from the handset to 16 Kbps and converts the 16 Kbps voice into an analog signal. A telephone control unit 28 which outputs to a handset and controls a communication system, and a LAPD (Lin) which controls an incoming / outgoing call regarding an ISDN information channel.
k, Acces, Procedure, on, the,
Dchannel controller 29 is an ISDN line driver connected to the basic interface (2B + D) of ISDN.

On the videophone device 10 'shown in FIG.
When used by connecting to the other party's videophone device 10'-1 connected to N, if the telephone number of the other party's videophone device 10'-1 is input from the handset, the LAPD controller is controlled by the telephone system control unit 27. 28 performs call control of a control channel (hereinafter referred to as DCH), and connects to the other party's videophone device 10′-1 via B ₁ CH,
Communication is started at 48 Kbps for images and 16 Kbps for audio, and it can be used as a videophone device.

Explaining the image signal at this time, under the control of the processor 20, the image signal captured by the camera is taken in by the image display control unit 22 ', and the image signal is constantly displayed.
Image is compressed by DEC23 and written in memory 21 ',
The data is read out under the control of the DMAC 24 and HDLC
The data is transferred to the unit 25, and the HDLC unit 25 outputs it as serial data in the HDLC frame format at a speed of 48 Kbps.

[0006] This data is one voice from the handset.
The audio data of 6 Kbps is multiplexed with the demultiplexing unit 26 to form an information channel of 64 Kbps, which is sent to the partner videophone device 10'- ₁ via the ISDN B ₁ CH.

On the other hand, the 64 Kbps information sent from the partner video telephone device 10'-1 is separated by the demultiplexing unit 26 into 48 Kbps image information and 16 Kbps voice information, and the voice information is sent to the telephone system control unit 27. It will be converted to an analog signal and you will be able to hear the sound on the handset.

The image information is converted from a serial signal to a parallel signal by the HDLC unit 25, transferred to the image CODEC 23 by the control of the DMAC 24 and constantly receiving data is expanded, and sent as a video signal to the CRT by the control of the image display control unit 22. To do.

As a result, a simple moving image is displayed on the partner image portion of the CRT screen shown in FIG. 4 (A). Regarding the self-portrait, the video captured from the camera is sent to the CRT under the control of the image display control unit 22, and C shown in FIG.
It is displayed as a moving image in the image part on the self side of the RT screen.

A host computer 11 connected to the ISDN shown in FIG. 3 is provided from the video telephone device 10 'to, for example, a customer corresponding to the counterpart video telephone device 10'-1.
When an attempt is made to proceed with a business negotiation by showing the document or database information of the product or the like stored in the table as an image, the retrieval device 12 of FIG. 3 connects to the host computer 11 to retrieve the necessary document or database information and print out. Then, switch the printout to a camera that shows a different screen from the one that shows your face, and copy it.
An image of ps is compressed and sent to the other party's videophone device 10'-1, expanded and displayed on the other party's image part of the CRT.

[0011]

However, in order to display the document or database information stored in the host computer as an image on the partner video telephone device, a search device is required and the device becomes large in size. ,
Since what is printed out is photographed by the camera and sent as image information, there is a problem that it takes time and labor and the resolution of the display screen deteriorates.

It is an object of the present invention to provide a video telephone device capable of searching for necessary documents and database information stored in a host computer connected to an ISDN and sending them to the other party's video telephone device for display.

[0013]

FIG. 1 is a block diagram showing the principle of the present invention. As shown in FIG. 1, the ISDN basic interface (2B + D) B ₁ CH connects to the other party's videophone device 10, and the videophone device for exchanging image and voice information connects to ISDN via B ₂ CH. A connecting means 1 for connecting to a host computer 11 that is connected to the host computer 11; and a search and transmitting means 2 for searching the host computer 11 connected by the connecting means 1 and transmitting the information to the partner videophone device 10. To do.

[0014]

According to the present invention, the connecting means 1 for connecting to the host computer 11 connected to the ISDN by the B ₂ CH, and the information retrieval from the host computer 11 connected by the connecting means 1 and the other party It has a search transmission means 2 for transmitting to the videophone device 10, and B ₂ CH is connected by the connection means 1.
Connected to the host computer 11, the search transmission means 2 retrieves necessary documents and database information from the host computer 11, and transmits them to the partner videophone device 10 via the B ₁ CH.
Since it is not necessary to print out the retrieved document or database information and send it through the camera, the device does not become large, and it can be sent quickly with less effort and the resolution is degraded. Absent.

[0015]

FIG. 2 is a block diagram of a videophone device according to an embodiment of the present invention. 2 is different from the conventional example of FIG. 4 in that
The memory 21 is provided with a connection program 41 for instructing to connect to the host computer by B ₂ CH, and a transmission program 42 for transmitting the stored information retrieved and stored from the host computer to the partner video telephone device when instructing the transmission. Image display control unit 22 which takes in information from B ₂ CH
To LAPB (Link, Acces, Proced
ure, Blanched) 30 and mouse 31,
Connect with B ₂ CH to the host computer 11 connected to the ISDN shown in FIG. 1, host computer 11
Search for more necessary documents and database information,
Since this is the point that the image is sent to and displayed on the other party's videophone device 10, the different points will be mainly described below.

In the case of the present embodiment, the image display control unit 22 controls the image on the CRT screen as shown in FIG. 2 (A). The self-image portion for displaying an image is the host search image portion for displaying the information retrieved by the host computer 11 on the left side.

The process is the same as the conventional example until the connection and the conversation with the partner videophone device 10 via the B ₁ CH, but the necessary document and database information stored in the host computer 11 is searched and the partner videophone device 10 is searched. When it is necessary to display the message on the computer, the processor 20 instructs the B computer to connect to the host computer 11 by using the mouse 31.
_The connection program 41 for instructing to connect to the host computer by ₂ CH instructs the telephone system control unit 27 to control the LAPD controller 28 by the telephone system control unit 27, and the host computer 11 by B ₂ CH. Call to connect.

Then, the host computer 11 sends B ₂ C
A menu is sent via H. Then, the LAPB 30 takes this and displays it on the host search image portion of the CRT via the image display control unit 22.

When the mouse 31 is followed through the menu to search for the required document or database information, the required document or database information is sent from the B ₂ CH, and the LAPB 30 loads the document or database information into the memory 21 for image display. It is read by the control unit 22 and displayed on the host search image portion of the CRT.

Therefore, when the processing menu is displayed with the mouse 31 and the transmission is instructed, the transmission program 42 reads out from the memory 21, the HDLC section 25, the demultiplexing section 26,
The data is transmitted to the partner video telephone device 10 via the ISDN line driver 29, B ₁ CH.

Then, in the other party's videophone device 10, the IS
DN line driver 29, demultiplexing unit 26, HDLC unit 2
5 is written in the memory 21 via the image display control unit 2
2 displays this on the host search image portion of the CRT while expanding the read image CODEC 23.

That is, since the videophone device can retrieve the necessary document or database information stored in the host computer 11 during the conversation with the partner videophone device and send it to the partner videophone device for display.
Since it is not necessary to print out the retrieved document or database information and send it through the camera, the device does not become bulky, and it can be transmitted quickly with less labor and the resolution is not deteriorated.

[0023]

As described in detail above, according to the present invention, a small-sized counterpart TV which is engaged in quick communication of necessary documents and database information stored in a host computer connected to an ISDN is quick and easy. There is an effect that a videophone device which can be transmitted to the telephone device and which does not deteriorate the resolution can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of the principle of the present invention,

FIG. 2 is a block diagram of a videophone device according to an embodiment of the present invention,

FIG. 3 is a block diagram of a conventional videophone device system,

FIG. 4 is a block diagram of a conventional videophone device.

[Explanation of Codes] 1 is connection means, 2 is search and transmission means, 10, 10 ′, 1
0'-1 is a videophone device, 11 is a host computer, 12 is a search device, 20 is a processor, 21, 21 '
Is a memory, 22 and 22 'are image display control units, 23 is an image CODEC, 24 is a direct memory access control unit, 25 is a high level data link control, 26 is a demultiplexing unit, 27 is a telephone system control unit, and 28 is a LAPD. Controller, 29 ISDN line driver, 30 LAPB, 3
1 is a mouse, 41 is a connection program, and 42 is a transmission program.

Claims (1)

[Claims] 1. A basic interface of ISDN (2B +
D) One information channel, the other party's videophone device (1
Connection means (1) for connecting to the host computer (11) connected to the ISDN through another information channel in the video telephone device that connects to 0) and exchanges image and audio information.
And a search and transmission means (2) for searching information from the host computer (11) connected by the connection means (1) and transmitting the information to the partner video telephone device (10). Videophone device.