JPH07183981A - Image communication terminal - Google Patents

Abstract

PURPOSE:To automatically make still image data in a facsimile equipment high speed data and to enable an efficient transmission by opening an HSD channel till the transmission is terminated when the number of line reaches a preliminarily set number. CONSTITUTION:An image communication terminal equipment fetches the still image data from a G3 FAX 4 in the memory of the equipment by exchanging control signals and data with the FAX 4 by a G3 FAX control part 8. At this time, a line number counting part 10 counts the fetched number of line and judges whether the number reaches the number of line set preliminarily by a terminal control part 9 or not. The counting part 10 only updates the number of line when the fetched number does not reach the set number and decreases the transmission speed of a moving image for a BAS control part 13 and opens a channel for HSD when the fetched number reaches the set number. The control part 13 transmits all the data stored in the memory by the HSD, closes the channel for HSD when the transmission is terminated and restores the transmission speed of the moving image. Thus, the still image can be efficiently transmitted by automatically making the image high speed data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication terminal device having a multiplex transmission function for video, audio and data.

[0002]

2. Description of the Related Art In recent years, the International Telegraph and Telephone Advisory Committee (hereinafter,
"ITU-TS"), the video encoding system, the multiplexing system, and the communication procedure for the audiovisual service have been officially recommended, and accordingly, the TV conference system and the moving picture T conforming to the ITU-TS recommendation from each company.
Image communication terminal devices such as V-phones are on sale.

Hereinafter, a conventional image communication terminal device for performing processing in accordance with the ITU-TS recommendation will be described with reference to the drawings. FIG. 6 is a functional block diagram of a conventional image communication terminal device. In FIG. 6, 1 is a handset, 2
Is a camera for taking self-portraits, 3 is a monitor for displaying video from the other party or self-portrait, 4 is a group 3 facsimile (hereinafter referred to as "G3 FAX") for capturing still images and printing out, 5 is a telephone number A key operation unit for inputting and selecting functions, 6 is a voice control unit for compressing / encoding and decompressing / decoding voice data,
Reference numeral 7 is a moving picture control unit for compressing / encoding and expanding / decoding moving image data, and 8 is a G3FAX control unit for exchanging control signals with G3FAX4 and compressing / encoding / expanding / decoding the captured still image data. , 9 is a terminal control unit that controls the entire terminal device based on the settings from the key operation unit 5, and 12 is a ITU-T for moving images, still images, and audio data.
Recommendation S. H. 221 (64kbit / s to 1920kbit / s channel frame structure in audiovisual teleservice) is multiplexed, and the frame sent from the other party is separated into moving image, still image, and audio data. Department,
13 is ITU-TS recommendation H.264. 242 (1920 kbit
BAS (bit rate allocation signal: Bit-) that executes a communication procedure based on a method for setting communication between audiovisual terminals using digital channels up to / s
rate allocation signal control unit, 14 is a call control processing unit that manages calls such as incoming and outgoing calls and disconnection, 15 is a line interface unit for connecting a terminal to an integrated services digital network (ISDN), and 16 is an ISDN. is there.

Further, FIG. 5 shows the ITU-TS recommendation H.264. 221
FIG. 6 is a diagram showing a multiplexing frame structure defined by the above. Regarding the BAS code transmitted by this frame, ITU-TS recommendation H.264 is recommended. 221 defines as in Table 1.

[0005]

[Table 1]

The operation of the conventional image communication terminal device configured as described above will be described below. Set the telephone number of the other terminal from the key operation unit 5 and press the call key. The terminal control unit 9 notifies the call control processing unit 14,
The call control processing unit 14 connects the communication channel with the partner terminal via the line interface unit 15. After the connection is completed, H.264 is used by using the communication channel. Based on 242, the frame synchronization shown in FIG. 5 is established, and after the synchronization is established, the operation modes such as the data transmission rate are mutually negotiated. Therefore, among the BAS codes shown in Table 1, the audio / transfer rate capability, Data / video capability is used to exchange terminal capability information with a partner terminal. Next, the command BAS code is used to switch to an appropriate operation mode in consideration of the capabilities of the own terminal and the partner terminal.

After that, in order to transmit the still image data to the partner terminal, the still image data is fetched from the G3FAX4, the G3FAX control unit 8 exchanges control signals with the G3FAX4, and then the fetched data is compressed to obtain the data. After confirming that all the data has been captured and compressed, the transmission request key is pressed down from the key operation unit 5. The terminal control unit 9 notifies the G3 FAX control unit 8 of the transmission request instruction, and the multiplexing / demultiplexing unit 12 multiplexes the still image data, and then the HSD (High Speed Data: High Speed Data) via the line interface unit 15. Is transmitted.

[0008]

However, in the above-mentioned conventional image communication terminal device, when transmitting still image data captured from the G3 FAX as an HSD,
In the case of N basic interface (64 kbps x 2),
Usually, 64 kbps for HSD and 56 kbps for voice,
Since the rest is moving images, it may happen that almost no moving images can be sent. At this time, if the data is transferred from the G3FAX4 while being transferred from the G3FAX4 while the data is being transferred from the G3FAX4 (about 1
Min) Since the HSD channel is opened, there is a problem that almost no moving image data can be sent during that time. Also, once the data has been imported from G3FAX4,
To open the HSD channel and transmit data, use G
There was a problem that the user had to give an instruction after confirming that the data was captured from 3FAX4.

In order to avoid the above-mentioned problems, G3F
LSD (low-speed data: Low S to the other terminal) at the same speed as the speed (9600 bps) for fetching data from AX4
There is also a method of transmitting it as Ped Data, but L
SD can transmit only one type of image data from a tablet, data from a personal computer, etc., so G3
There is a problem that other data cannot be transmitted while transmitting the data from the FAX 4.

An object of the present invention is to provide an image communication terminal device capable of efficiently transmitting still image data fetched from a facsimile as an HSD.

[0011]

An image communication terminal device according to claim 1 counts the number of lines of still image data fetched from a facsimile and outputs a signal when a preset number of lines is reached. And a BAS control unit that opens the HSD channel by the output signal of the line number counting unit and closes the HSD channel when the transmission of the still image data is completed.

The image communication terminal device according to claim 2 is the first
When a signal of is input, the data amount of still image data fetched from the facsimile is recognized, and a line number determination unit that determines the number of channel opening lines for opening the HSD channel according to the data amount, and a facsimile The number of lines of the still image data taken in is counted, and when the preset number of data amount recognition lines is reached, a first signal is output to the line number determination unit, and the line number determination unit determines The HSD channel is opened by the line number counting unit that outputs the second signal when the number of channel open lines is reached, and the second signal output by the line number counting unit, and the transmission of the still image data is completed. A BAS controller for closing the HSD channel is provided.

[0013]

According to the structure of the present invention, the still image data taken in from the facsimile is temporarily stored and then transmitted, and the line number counting section counts the number of lines of the still image data taken in from the facsimile. When the preset number of lines or the number of lines for channel opening determined by the line number determining unit is reached, the BAS control unit is instructed to open the HSD channel.
The time when the D channel is opened can be minimized, and the time when moving image data cannot be transmitted can be reduced. Also, the user does not have to indicate when to transmit.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of an image communication terminal device according to a first embodiment of the present invention. In FIG. 1, 1 is a handset, 2 is a camera, 3 is a monitor, 4 is a G3 FAX, 5 is a key operation unit, 6 is a voice control unit, 7 is a moving image control unit, 8 is a G3 FAX control unit, 9 is a terminal control unit, 1
2 is a multiplexing / demultiplexing unit, 13 is a BAS control unit, 14 is a call control processing unit, 15 is a line interface unit, and 16 is ISDN.
And these are the same as the configuration of the conventional example.

In the image communication terminal device of this embodiment,
The difference from the conventional example is that the line number counting unit 10 is provided, and the line number counting unit 10 is a G3FAX4
The number of lines of the fetched data is measured, and it is determined whether the number of lines matches the number of lines designated in advance. If they match, the BAS control unit 13 is instructed to open the HSD channel.

FIG. 2 is a flowchart for transmitting G3FAX4 data in this embodiment. FIG. 3 shows an example of the number of lines determined to command the HSD channel in the line number counting section 10 in this embodiment. The operation of the image communication terminal device configured as described above will be described below.

A G3 FAX using this image communication terminal device
When transmitting still image data captured from the G4, the G3FAX4 to the G3FAX4 follow the same procedure as the conventional device.
While exchanging control signals and data with the control unit 8,
Data is taken into the memory on the device (step S
1, S2). At that time, the line number counting unit 10 counts the number of lines fetched from the G3 FAX 4 (step S3),
It is determined whether the number of lines set in advance by the terminal control unit 9 has been reached (step S4). If the set number of lines has not been reached, the line number counting unit 10 only updates the number of lines, but the counted number of lines is the preset number of lines (point A in FIG. 3). ), The BAS control unit 13 is instructed to decrease the moving image transmission speed and open the HSD channel (step S5). BAS control unit 1 that received the command
No. 3 opens the HSD channel, starts transmitting the data fetched from the G3FAX4 once stored in the memory (step S6), and when the transmission of all data is completed (step S7), closes the HSD channel to generate a moving image. To the original state (step S8), and the moving image data is transmitted.

Next, a second embodiment of the present invention will be described. FIG. 4 is a functional block diagram of the image communication terminal device of the second embodiment of the present invention. In FIG. 4, 11 is G3F
The amount of data stored in the memory by the AX control unit 8 is compared with the number of lines from the line number counting unit 10, and the number of lines for starting transmission on the HSD channel is determined according to the amount of data and the number of lines. Is a line number deciding unit for appropriately adjusting and notifying the line number counting unit 10, and other than that is the same as the configuration of the first embodiment.

The operation of the image communication terminal device configured as described above will be described below. When transmitting still image data fetched from the G3FAX4, the G3FAX4 exchanges control signals and data with the G3FAX control unit 8 in the same procedure as in the first embodiment, and fetches the data into the memory on the device. To do. At that time, G3F
The line number counting unit 10 counts the number of lines fetched from the AX4, and when the preset first number of lines (the number of lines for data amount recognition) is reached, the data amount at that time is grasped, and the data The line number determination unit 11 automatically determines the second line number (channel open line number) that should be instructed to open the HSD channel according to the amount.
Notify the line number counting unit 10. The line number counting unit 10 determines whether the counted number of lines is the second number determined by the line number determining unit 11.
When the number of lines is reached, the BAS control unit 13 is instructed to decrease the moving image transmission speed and open the HSD channel. After that, the HSD channel is opened by the same procedure as in the first embodiment, and the still image data fetched from G3FAX4 is transmitted.

The line number determining unit 11 estimates the total data amount and the transmission time of the second line number according to the data amount at the time when the first line number is reached, and fetches all the data. Determine so that the end and the transmission end are the same. According to the above-described embodiment, the still image data captured from G3FAX4 is stored and then transmitted, and the line number counting unit 10 counts the number of lines of the still image data captured from G3FAX4 and sets it in advance. The HSD channel is opened when the set number of lines (in the case of the first embodiment) or the second number of lines determined by the line number determination unit 11 (in the case of the second embodiment) is reached. The BAS control unit 13 is instructed. Therefore, the process from the capture of the still image data to the transmission can be automatically performed without the user's instruction, and the HSD
It is possible to minimize the time for which the use channel is opened, reduce the time when the moving image data cannot be transmitted, and efficiently transmit the moving image data.

Further, according to the second embodiment, by providing the line number determining unit 11, the second line number (channel open line number) is determined in accordance with the data amount of the original read from the G3 FAX 4. Therefore, even if the amount of data changes, the data can be transmitted more efficiently.

[0022]

As described above, according to the present invention, the still image data fetched from the facsimile is temporarily stored and then transmitted, and the line number counting unit determines the number of lines of the still image data fetched from the facsimile. The BAS control unit is instructed to open the HSD channel when the number of lines has been counted and the number of lines for channel opening set by the line number determination unit or the number of lines determined in advance has been reached. Therefore, the process from the capture of the still image data to the transmission can be automatically performed without the user's instruction, the time for which the HSD channel is open can be minimized, and the moving image data cannot be transmitted. Time can be reduced and efficient transmission is possible. Further, by providing the line number determining unit, the number of channel opening lines is determined according to the amount of data to be fetched from the facsimile, so that even if the amount of data varies, transmission can be performed more efficiently.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an image communication terminal device according to a first embodiment of the present invention.

FIG. 2 is a flowchart for transmitting G3 FAX data in the first embodiment of the present invention.

FIG. 3 is an example of the number of lines determined for instructing to open the HSD channel in the line number counting unit in the first embodiment of the present invention.

FIG. 4 is a functional block diagram of an image communication terminal device according to a second embodiment of the present invention.

FIG. 5: ITU-TS Recommendation H.264 FIG. 22 is a diagram showing a multiplex frame structure defined by H.221.

FIG. 6 is a functional block diagram of a conventional image communication terminal device.

[Explanation of symbols]

 4 G3FAX 6 Audio control unit 7 Video control unit 8 G3FAX control unit 9 Terminal control unit 10 Line number counting unit 11 Line number determining unit 12 Multiplexing / separating unit 13 BAS control unit 14 Call control unit 15 Line interface unit 16 ISDN

Claims (2)

[Claims] 1. An image communication terminal device having a function of multiplex transmission of video, audio and data, wherein the number of lines of still image data fetched from a facsimile is counted to reach a preset number of lines. A line number counting section that outputs a signal at times, and a bit rate allocation signal that opens the high-speed data channel by the output signal of the line number counting section and closes the high-speed data channel when the transmission of the still image data ends. An image communication terminal device comprising a control unit. 2. An image communication terminal device having a function of multiplex-transmitting video, audio and data, wherein when the first signal is input, the data amount of still image data fetched from a facsimile is recognized, and A line number determination unit that determines the number of channels for channel opening for opening a high-speed data channel according to the amount of data, and data set in advance by counting the number of lines of the still image data fetched from the facsimile. When the number of lines for quantity recognition is reached, the first
And a line number counting unit which outputs a second signal when the number of lines for channel opening determined by the line number determining unit is reached, and the second number output by the line number counting unit. An image communication terminal device, comprising: a bit rate allocation signal control unit that opens the high-speed data channel by a signal and closes the high-speed data channel when transmission of the still image data ends.