JPH0983699A - Picture transmission equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize an equipment dealing with analog by providing a means storing facsimile data, a means developing facsimile data, a means converting data for picture display and a means superimposing facsimile data. SOLUTION: A picture to be sent to an opposite party is inputted to a video signal processing part 4 to be converted to digital data, and is compressed by a picture codec part 5. Sound is converted to digital data by a speech signal converting part 6 and inputted to a sound codec part 7 to be compressed. Picture data compressed by the codec part and sound data compressed by the codec part 7 are multiplexed by a multiplex separation part 8 and outputted to an ISDN line network through an II/F part 11. At the time of calling, digital data is converted to analog data by a digital-analog network converter 9 by dialing a telephone set and connecting processing with outside is executed through the II/F part 11 by call-processing by a call control part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image transmission apparatus, and more particularly to an image transmission apparatus which can use a conventional device corresponding to an analog line.

[0002]

2. Description of the Related Art A conventional image transmission method will be described with reference to FIG. In the figure, reference numeral 21 is a video signal processing unit, 22 is an image codec unit, 23 is an audio signal processing unit,
Reference numeral 24 is a voice codec unit, 25 is a demultiplexing unit, 26 is an operation unit, 27 is a call control unit, 28 is an ISDN line interface unit (hereinafter simply referred to as "II / F unit"), and 29 is for controlling the device. It is a control unit.

The video signal processing section 21 inputs a video signal from a camera or an external device, outputs a video signal to a monitor or an external device, and converts the video signal into digital data to create image data. The image codec unit 22 compresses the image data according to the CIF and QCIF image formats for a moving image, and adds the data notifying the image format used for the compression for a still image to transmit the compressed image data. To do.

The voice signal processing unit 23 inputs voice from a built-in microphone or an external voice input device, outputs sound from a built-in speaker or an external voice output device, and further outputs voice to a handset included in the device. Input and output. Further, the audio signal processing unit 23 adjusts the level of the audio signal,
Alternatively, processing such as amplification is performed and converted into digital data. The audio data converted into digital data is sent to the audio codec section 24, and data compression is performed. The voice data compression method is used in communication where μ
-Law (64 kbps), ADPDM (32 kbp)
s) and LD-SELP (16 kbps).

The image data compressed by the image codec section 22 and the audio data compressed by the audio codec section 24 are multiplexed by the demultiplexing section 25 and sent to the II / F section 28 for electrical transmission to the line network. After physical and physical level adjustment is performed, it is transmitted to the outside. When making a call, the operation unit 26 performs on-hook detection or dialing, and the call control unit 27 performs control.

When receiving, the signal is sent to the II / F section 28.
Then, it goes to the call control unit 27 and confirms whether the received signal is really addressed to this terminal. If so, a signal is sent to the operation unit 26 and a ringer or the like is sounded to notify that the call has arrived. Also, by detecting the on-hook, the permission of the incoming call is issued. After confirming the incoming call permission, the other terminal is confirmed, the reception capability data of the own terminal is sent to the other party, and terminal confirmation (negotiation) is performed. At this time, the connection is made in a place where the capabilities of both terminals are high. If, as a result of capability exchange, both terminals do not have a common level at which they can be connected, they will not be connected.

When the terminal confirmation is completed and the actual voice / image data is transmitted / received, the demultiplexing unit 25 passes through the II / F unit 28 to separate the voice data and the image data. The voice data goes to the voice codec unit 24, undergoes data decompression, enters the voice signal processing unit 23, sounds a sound from the handset of the operation unit 26, and is output to the built-in speaker and the voice external output unit. Further, the image data separated by the demultiplexing unit 25 is expanded by the image codec unit 22,
The video signal processing unit 21 converts the video signal. The signal converted into the video signal is displayed on an internal monitor or an external display device. Further, the series of control is performed by the control unit 29.

[0008]

However, in the conventional case, when the image and voice communication is performed using the ISDN line, the dedicated terminal occupies the line and the conventionally used analog line supporting device is wasted. there were. Further, although network conversion can be performed by analog TA and an analog telephone can be used, in this case, there is a drawback that image communication using a digital line cannot be performed.

[0009]

SUMMARY OF THE INVENTION Therefore, the present invention is intended to solve the above problems by utilizing a digital line-analog line conversion in the device and utilizing an analog line compatible device which has been used conventionally. .

That is, an image communication apparatus for transmitting and receiving voice and image through a digital telephone line according to claim 1, wherein means for inputting / outputting voice and performing compression / expansion and input / output for image, compression / extension. Means for transmitting the data to be called, means for multiplexing the compressed voice data and image data to the data to be transmitted, and transmitting the data according to a predetermined procedure for the line network, and voice data and image data to the data to be called. In an image communication apparatus equipped with a means for separating an analog line and a conventional means for connecting an analog telephone for confirming a call and an incoming call, the facsimile data sent when an analog line compatible facsimile is connected is stored. Means, means for expanding the stored facsimile data, means for converting the expanded facsimile data for image display, and image data to be displayed conventionally. A configuration provided with the means for superimposing the converted facsimile data data and for the image display.

Further, in the configuration described above, a means for searching the stored facsimile data, a means for displaying the search result on the screen, and a content connected on the screen for the facsimile connected to the outside of the main body, And a means for making a call.

An analog line connection device can be utilized and G
3FAX and the like can also be used, and conventional facsimile services and the like can be received.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail with reference to FIG. In FIG. 1, reference numeral 1 is the main body of the image communication device, and reference numeral 2 is an analog line compatible device A.
And reference numeral 3 is a device B corresponding to the analog line. The image communication device main body 1 is connected to the network via an ISDN line and is equipped with two lines of analog telephone connection terminals.
Each of the two terminals has an analog line compatible device A
2 and a device B3 compatible with an analog line are connected.

The ISDN line contract is now INS64.
If both analog line compatible device A2 and analog line compatible device B3 are connected to an analog telephone,
You can make telephone calls to different destinations at the same time with each telephone. Further, in the case of performing image / voice communication, an analog telephone of the analog line compatible device A2 is used as a means for making a call to the image / voice communication device of the other party, and images and voices are input / output to / from the device body. Thus, it is possible to perform image and voice communication. Furthermore, when making a call from the analog telephone of the analog line compatible device B3 during this image and voice communication, it is possible to make a call to another ground if a communication capacity of at least 1 B (64 kbps) is secured.

The image communication apparatus main body according to the present invention will be described in detail with reference to FIG. In FIG. 2, reference numeral 4 is a video signal processing unit, reference numeral 5 is an image codec unit, reference numeral 6 is an audio signal processing unit, reference numeral 7 is an audio codec unit, reference numeral 8 is a demultiplexing unit, and reference numeral 9 is a digital-analog network conversion unit. , Code 1
Reference numeral 0 is a call control unit, reference numeral 11 is an II / F unit, and reference numeral 12 is a control unit.

In the case of transmission, the image to be sent to the other party is input to the video signal processing section 4 from an image input device provided outside and converted into digital data, and the converted digital data is further converted by the image codec section 5. Compressed. The voice is converted into digital data by the voice signal processing unit 6, input to the voice codec unit 7, and compressed. The image data compressed by the image codec unit 5 and the audio data compressed by the audio codec unit 7 are multiplexed by the demultiplexing unit 8 and output to the ISDN line network via the II / F unit 11.

When making a call, dialing is performed from an analog telephone connected to the main body of the apparatus, the digital-analog network conversion unit 9 converts the analog data, and the call control unit 10 performs a call processing. By doing
The connection processing with the outside is performed via the II / F unit 11.

Further, in the case of reception, when the main body of the apparatus receives an incoming call from the outside, the call control section 10 makes a determination via the II / F section 11. If the own terminal is called, the operator is notified of the incoming call by ringing the ringer to the terminal connected to the apparatus main body through the digital-analog network conversion unit 9. When off-hook is detected and the connection is established, data exchange starts after confirming the capabilities of both terminals.

The received data is received by the II / F unit 11,
The demultiplexing unit 8 separates the image data and the audio data. The image data is decompressed by the image codec unit 5, converted into an analog signal by the video signal processing unit 4, and output to an external display device. Also, the voice data is decompressed by the voice codec unit 7, converted into an analog signal by the voice signal processing unit 6, and a call is made through the digital-analog network conversion unit 9 using a handset of an analog telephone connected to the outside of the device. It can be carried out. Also, the audio signal processing unit 6
Output to an external audio output device, and the control unit 12 controls the entire system.

In the state where an analog telephone is connected as the other analog line compatible device, 1B (64 kbps) of the entire digital line is used for image and voice communication.
If you have enough minutes, you can use this analog phone to talk to another destination.

Embodiment 1 When image and voice communication is performed and a facsimile is received on another line, and the facsimile is connected to the outside of the apparatus, the data is sent to the external facsimile as it is,
It can be printed on paper. Further, when the facsimile data is received, it can be stored in the memory in the image codec unit 5.

The operation of the image codec section 5 will be described with reference to FIG. Reference numeral 13 is an image codec, reference numeral 1
Reference numeral 4 is a work memory used when the image codec 13 performs compression / expansion, reference numeral 15 is a transmission image memory, reference numeral 16 is a reception image memory, and reference numeral 17 is further provided.
Is an image memory for facsimile. When transmitting an image, the digitally converted transmission data is temporarily stored in the transmission image memory 15. Then, the image codec 13 reads the transmission data from the transmission image memory 15, compresses the data, and then outputs the data to the demultiplexing unit 8. The image codec 13 also receives the received data from the demultiplexing unit 8 and decompresses it. This decompressed data is recorded in the receiving image memory 16 and stored in the video signal processing unit 4
Sent to the / D converter.

Facsimile data sent by the other line is usually treated as voice data as in telephone call. This is because when a telephone call is made from an analog telephone via a digital line, the telephone station side performs digital conversion to make a telephone call. Similarly, the modulated analog signal transmitted from the G3 FAX is also converted into a digital signal at the telephone station and transmitted.

Next, the details of the voice codec section will be described with reference to FIG. In FIG. 4, reference numeral 18 is a voice codec, reference numeral 19 is a facsimile data receiving memory, and reference numeral 20 is a facsimile data expanding unit. Normally, the audio data passes through the audio codec 18 and is decompressed and converted into an analog signal. When the sent data is facsimile data, it is stored in the facsimile data receiving memory 19 as it is. The recorded data is sent to the facsimile data expansion unit 20 and converted into an image display format here. The converted data is recorded and displayed in the facsimile image memory 17 shown in FIG.

At this time, in order to display the image to be transmitted and the image of the received facsimile, the video signal processing unit displays each data on the screen according to an instruction from the control unit 12 shown in FIG. Select the image and then D / A
After conversion, display on screen.

An example of the display image on the screen is shown in FIG. In FIG. 5, the image of the received facsimile is displayed on the left half, and the displayed facsimile information and operation soft buttons are displayed on the right half, so that the operator can confirm and operate. You can As the facsimile information, the received date, time, partner telephone number, number of sheets, display page, etc. are displayed.

Further, by using an analog telephone or a remote controller connected to the outside, enlargement, reduction, rotation of the screen, scrolling up / down / left / right, and printing are designated. With regard to the display, when the size is readable on the screen, even if the entire sheet of paper is displayed at once, it is not readable, so the display position can be changed with the arrow keys. Further, when it is desired to grasp the image of the entire page, "reduction" can be selected, and when it is desired to restore the original image, "enlargement" can be selected. Furthermore, when the paper is rotated 90 degrees when sending it, or when it is reversed and sent, "rotation"
It can be turned into a normal state by rotating 90 degrees at a time. Furthermore, by displaying "print", the data of the displayed facsimile data can be output to an external facsimile.

Second Embodiment Next, a second embodiment will be described with reference to FIG. When the data stored in the facsimile data receiving memory 19 is displayed on the screen, the sent date, time, destination telephone number, etc. are displayed. When the content stored in the facsimile data receiving memory 19 is to be output from the external facsimile, correspondence identification is performed by designating a unique number between the external facsimile and the apparatus main body via the call control unit 10.

When a call is made from the main body of the apparatus to an external facsimile and connection becomes possible, the data is read from the facsimile data receiving memory 19 shown in FIG. 4, sent to the voice codec 18, and converted into an analog signal. Furthermore,
After being sent to the call control unit 10, data can be sent to an external facsimile and output from the external facsimile.

[0030]

As described above, by adding the analog-to-digital network conversion function to the video / audio transmission device, a conventional analog line compatible device can be used, and the conventional G3 FAX data can be read. It can be displayed on the screen. Further, the stored facsimile data can be selected on the screen of the apparatus and the data can be printed by the facsimile connected to the outside of the apparatus.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a connection example of an analog line connection device.

FIG. 2 is a basic configuration diagram of an image communication device main body according to the present invention.

FIG. 3 is a detailed diagram of an image codec unit.

FIG. 4 is a detailed diagram of an audio codec unit.

FIG. 5 is a diagram showing an example of a display image on a screen.

FIG. 6 is a diagram showing an example of line connection by a conventional method.

[Explanation of symbols]

 1 image communication device main body 2 analog line compatible device A 3 analog line compatible device B 4 video signal processing unit 5 image codec unit 6 audio signal processing unit 7 audio codec unit 8 demultiplexing unit 9 digital-analog network conversion unit 10 call control unit 11 II / F section 12 control section 13 image codec 14 work memory 15 transmission image memory 16 reception image memory 17 facsimile image memory 18 voice codec 19 facsimile data reception memory 20 facsimile data expansion section 21 video signal processing section 22 image codec 23 audio signal processing section 24 audio codec section 25 demultiplexing section 26 operating section 27 call control section 28 ISDN line interface section (II / F section) 29 control section

Claims (2)

[Claims] 1. An image communication device for transmitting and receiving voice and images through a digital telephone line, comprising: means for inputting and outputting voice, compression and decompression, means for inputting and outputting images, and performing compression and decompression, and making a call. The compressed voice data and image data to the data to be transmitted, and a method for transmitting the data to the line network according to a predetermined procedure, and a means for separating the voice data and the image data from the incoming data. In an image communication apparatus equipped with a means for connecting an analog telephone for confirming a call and an incoming call, a means for storing the facsimile data transmitted when an analog line compatible facsimile is connected, and the stored facsimile data Means for expanding, means for converting the expanded facsimile data for image display, image data displayed conventionally and the image table Image transmission apparatus being characterized in that and means for superimposing the converted facsimile data to use. 2. An image communication apparatus for transmitting and receiving voice and image through a digital telephone line, comprising means for inputting and outputting voice, compression and decompression, and means for inputting and outputting images and performing compression and decompression. The compressed voice data and image data to the data to be transmitted, and a method for transmitting the data to the line network according to a predetermined procedure, and a means for separating the voice data and the image data from the incoming data. In an image communication device having means for connecting an analog telephone for confirming a call and an incoming call, means for searching stored facsimile data, means for displaying the search result on the screen, and contents displayed on the screen 2. The image transmission apparatus according to claim 1, further comprising means for making a call to a facsimile connected to the outside of the main body.