JPS6354859A - Data transmitting system for electronic conference system - Google Patents

Abstract

PURPOSE:To improve the clarity and the concurrency of a data and at the same time to deal with even a line error by raising the compression rate of the compression coding of an audible sound inputting device and of a picture drawing inputting device, and making an audible sound data be mostly prior when detected traffics increase. CONSTITUTION:A transmission interfacing part 972 controls the traffic of a line, and transmits a traffic instruction signal (TRAF) to a voice compression interfacing part 942 and to a moving picture compression interfacing part 932. These voice compression interfacing part 942 and moving picture compression interfacing part 932 change the compression rate of the encoding of the voice data and of the moving picture data corresponding to the traffic instruction signal (TRAF). Namely, when the traffic quantity increases, the voice data and the moving picture data are compressed at high compression rate. Besides, when the traffic comes larger, the transmission interfacing part 972 elevates the priority of the voice data higher than that of the moving picture data and outputs them.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a transmission system for an electronic conference system that changes the priority order of data to be transmitted according to traffic.

(Prior Art) Recently, electronic conference systems for holding conferences with remote locations have been put into practical use.

Figure 4 is a diagram showing the physical connections of this electronic conference system, where conference unit system 1.3.5 connects to line 7.9.
．． 11 to a network 13.

FIG. 5 is a diagram showing the logical connections of this electronic conference system, in which the conference unit system 1.3.5 is connected by one B channel 15.17. of the home bus of the 15DN network.

Each conference unit system 1.3.5 includes a drawing input device for inputting drawing data, a still image input device for inputting still image data, a video input device for inputting video data, an audio input device for inputting audio data, and these devices. Each device of the output system that outputs data is connected to a control device, and this control device is connected to a transmission line via a transmission device.

In this electronic conference system, each data input from a drawing input device, still image input device, video input device, and audio input device is sent to the other party's conference unit system via a transmission device. These data are reproduced.

Each of these data is packetized and output to the line, and priorities are assigned depending on the immediacy of each data. The priority order is video data, audio data, drawing data, still image data, and management data, and the priority order is determined by - rate.

(Problem to be Solved by the Invention) In this method of transmitting data with regular priority, it is not necessary to change the data compression method depending on fluctuations in line traffic on a large-capacity line. There are no inconveniences as the image and sound quality are sufficiently clear. However, in the case of a small-capacity line, when the line traffic is small, it is necessary to compress it as much as possible, so -
If video data and audible sound data are sent in the same order by prioritizing the data, retransmission packets for both video data and audible sound data must be sent when a line error occurs. There was a problem in that the amount of data was large and it was not possible to promptly process line errors.

The present invention has been made in view of these problems, and its purpose is to provide a data transmission method for an electronic conference system that provides excellent data clarity and immediacy, and at the same time can quickly deal with line errors. It is about providing.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides an input system for inputting drawing data, still image data, moving image data, and audible sound data; An electronic conference in which multiple conference unit systems are connected via a line, consisting of an output system that outputs still image data, video data, and audible sound data, and a control system that controls the transmission of these data between remote locations. In the data transmission method of the system, there is a means for detecting line traffic, a means for increasing the compression rate of compression encoding of an audible sound input device and a drawing input device when the detected traffic increases, and a means for increasing the compression rate of compression encoding of an audible sound input device and a drawing input device when the detected traffic increases. and means for giving top priority to audible sound data among drawing data, still image data, moving image data, audible sound data, and management data to be output.

(Function) When the traffic is small, audible sound data and video data are compressed and encoded at a low compression rate, so that clear data can be sent.

When traffic is large, audible sound data and video data are compressed and encoded at a high compression rate, and audible sound data is output with priority over video data.
Line errors can also be dealt with quickly.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 2 is a block diagram showing the configuration of a conference unit system in an electronic conference system according to an embodiment of the present invention.

The control device 900 is connected to input devices for drawing, still image, moving image, and audio, and is also connected to output devices for magnetic storage, recording/output, and audio. Signals from these input devices and signals to output devices are subjected to processing such as selection and multiplexing according to several control information signals, and are then transmitted.

The input devices include a plurality of drawing input devices 100 for inputting handwritten characters and figures, a still image input device 200 for inputting documents before or during the meeting, and images of conference attendees and the background of the conference venue. A moving image input device 300 for inputting audio, and an audio input device 400 for inputting audio are connected.

In addition, the output devices include a plurality of flat display devices 150 and graphic display devices (1) 160 for displaying input information of the own terminal and transmitted drawing type and still image type, and graphic display device (1) 1.
A hard copy device 260 that takes a copy of 60, a graphic display device that displays video input information that is input or transmitted from its own terminal (2>350, an audio output device that outputs transmitted audio input information) 450 is connected.

Further, storage device 600 records and reads out this input/output information. The transmission device 700 is connected to two other remote conference unit systems.

The above input/output information is transmitted through signals from devices such as an operation input device 850, a state detection device 800 that detects whether conference attendees are sitting or leaving their seats, and a speaker identification device 510 that determines the speaker based on the voices of the conversation participants. The tip is controlled.

FIG. 1 is a block diagram showing the configuration of a control device 900. As shown in FIG.

Data from each input device and data to each output device are transmitted via an internal data bus 901.

That is, drawing data from the drawing input devices 100a, b, . Here, the letters a, b, . . . with alphabets added indicate that a plurality of devices with the same function are connected (the same applies hereinafter).

Still image data from still image input device 200 is sent to data bus 901 via input interface section 922 and data buffer 923.

Video data from the video input device 300 is sent to the data bus 901 via a video compression interface section 932 and a data buffer 933.

Audio data from the audio input device 400 is sent to the data bus 901 via the audio compression interface section 942 and data buffer 7943.

A frame identifier (FID) indicating which input device the data frame is from is added to these input data.

For data output, first the still image data is transferred to the data bus 90.
1 to the hard copy device 260 via the output interface section 926.

Similarly, still images and drawing data are transmitted from the data bus 901 to the flat display device 1 via the output interface section 916.
50a, b..., and is also sent to the graphic display device (1) 160 via the output interface section 917,
The video data is sent to the graphic display device (2> 350) via the output interface section 936, and the audio data is sent to the audio output device 450 via the output interface section 946.

Furthermore, still images are sent from the graphic display device (1) 160 to the data bus 901 via the input/output interface section 917.
You can also send drawing data.

Also, accumulated data from the accumulation device 600 is sent to the data bus 901 via the file interface 961.
Conversely, when storing data, the data is sent from the data bus 901 to the storage device 600 via the file interface 961.

Switching of the transmission destination of these data, selection of data, and multiplexing are performed by the frame controller 990.

When sending the data group collected by the frame controller 990 to the line, the transmission interface 972
is sent to the transmission device 700 via. A data group sent from the line via the transmission device 700 is sent to the frame controller 990 via the transmission interface 972.

Here data buffer J913.923.933.94
3 is for storing data when transmission to the data bus is temporarily interrupted due to switching of data transmission destination or data selection, or when transmission path capacity is temporarily exceeded due to multiplexing. belongs to.

A conference support section 991 controls the frame controller 990. The conference support unit 991 includes a speaker identification device 510, a state detection device 800, and an operation input device 850.
Instructs the frame controller 990 to select data, send destination, etc. by signals from etc.

FIG. 3 shows the frame structure of data input and output to the control device 900. Data frames include a still image frame 993, a drawing frame 994, a video frame 995, an audio frame 996, and a management frame 997.
There is. Each data frame begins with a frame identifier (F
ID) and device address (SAD). The still image frame 993 has a page identifier (PAGE>, the video frame 995 has a speaker switcher (PID) and a video encoding rule identifier (PRUL), and the audio frame 996 has a speaker identifier (TID), Audio encoding rule identifier (
VRUL) is provided.

Following the control information of each of these data, there is a respective data section.

The transmission interface section 972 sends a traffic instruction signal (TR
AF) is output.

The audio compression interface unit 942 and the video compression interface unit 932 change the encoding rules for audio data and video data using a traffic instruction signal @ (TRAF). That is, when the amount of traffic increases, audio data and video data are compressed and encoded at a high compression rate.

Since still image data, drawing data, and management data do not require immediacy, compression encoding is performed at a constant compression rate regardless of traffic fluctuations.

The transmission interface section 972 transmits traffic information,
The packet to be sent to the transmission device 700 is determined based on the video encoding rule identifier (PRUL), the audio encoding rule identifier (VRUL), and the like.

That is, when the traffic is small, the transmission interface unit 972 sets the priority order of sending packets to the line to the same priority order for video data and audio data, and manages video data/audio data>drawing data>still image data> Data.

When line traffic increases, audio data is given higher priority than video data.
Video data>drawing data>still image data>management data.

The reason why audio data is given higher priority than video data is that when comparing the need for clarity between audio data and video data, the need for clarity of audio is greater.

Next, the main operations of this embodiment will be explained.

The transmission interface unit 972 manages line traffic and sends a traffic instruction signal (TRAF>) to the audio compression interface unit 942 and video compression interface unit 932.These audio compression interface unit 942 and video compression interface unit 932 manage the traffic. The compression rate for encoding audio data and video data is changed according to the instruction signal (TRAF).

That is, when the amount of traffic increases, audio data and video data are compressed at a high compression rate.

Furthermore, when the traffic is small, the transmission interface section 972 gives the same priority to the video data and the audio data, and when the traffic becomes large, the audio data is sent with a higher priority than the video data.

Thus, in this embodiment, when the traffic is small, the audio data and video data are compressed and encoded at a low compression rate, the audio data and the video data are given equal priority, and clear data can be transmitted.

On the other hand, when traffic increases, audio data and video data are compressed and encoded at a high compression rate, and audio data is transmitted with priority over video data. Therefore, even if a line error occurs, the reproduced voice packet can be transmitted and the line error can be promptly dealt with.

[Effects of the Invention] As described above in detail, according to the present invention, data can be transmitted clearly and immediately, and line errors can be quickly dealt with.

[Brief explanation of the drawing]

FIG. 1 is a configuration block diagram of a control device in an electronic conference system according to an embodiment of the present invention, FIG. 2 is a configuration block diagram of the electronic conference system, FIG. 3 is a data frame 4-mat, and FIG. 5 is a diagram showing the physical connections of the electronic conference system, and FIG. 5 is a diagram showing the logical connections of the electronic conference system. 300...Movie input device 400...
. . . Audio input device 900 . . . Control device 932 . . . Video compression interface section 942 . . . Audio compression interface section 972.・・・・・・Transmission Interface Department Agent Patent Attorney Nori Chika Ken Shu Kanshu Sanno - Figure 2 Figure 4

Claims (1)

[Claims] (1) An input system that inputs drawing data, still image data, video data, and audible sound data, an output system that outputs drawing data, still image data, video data, and audible sound data, and a remote point. In a data transmission method of an electronic conference system in which a plurality of conference unit systems consisting of a control system that controls the transmission of data are connected via a line,
A means for detecting line traffic, a means for increasing the compression ratio of the compression encoding of an audible sound input device and a drawing input device when the detected traffic increases, and drawing data/static to be output when the detected traffic increases. 1. A data transmission method for an electronic conference system, comprising means for giving top priority to audible sound data among image data, video data, audible sound data, and management data.