JPS63149974A - Data transmission equipment - Google Patents

Abstract

PURPOSE:To reduce memory capacity by outputting data stored in a memory section coding and storing an optional data and raw data such as a picture or a voice switchingly. CONSTITUTION:An optional data is stored with coding in a memory section 11. A changeover control section 51 outputs the data stored in the memory section 11 switchingly before the raw data is sent. Thus, after the reception side observes the picture based on the data on confirm the opposite side and the raw data is sent to the sender side. Thus, the opposite station is confirmed before the raw picture is exchanged and the capacity of the memory storing the data for the confirmation is decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data transmission device such as an audio/image transmission device used for a video conference or a video phone that transmits and receives audio and image data.

[Conventional technology]

FIG. 6 is a block diagram of a data transmission device taking a conventional audio and image transmission device as an example. In the figure, 1 is the main body of the audio and image transmission device, 2 is a codec unit that encodes and decodes audio and image data, 3 is a transmission control unit that manages the interface with the line, 4 is an input/output control unit that manages input/output with external terminals, and 5 is a codec unit 2. Transmission control unit 3.
A system control unit 6 that manages and controls the input/output control jII unit 4
is a television, 7 is a camera, 8 is a microphone, 9 is a speaker, and 10 is a telephone.

Next, the operation will be explained.

First, the user hooks off the handset of the telephone set 10 and dials the other party's station number. In response, the lines of both stations are linked. Thereafter, when the handset of the telephone 10 of the receiving station is hooked off, the system control unit 5 of both stations decodes the received audio and image data, and outputs and reproduces the audio and image to the speaker 9 and television 6. Instruct. Also microphone 8
．． It encodes the raw audio and image data input from the camera 7 and instructs it to be sent to the partner station. As a result, raw audio/image data is taken in from the microphone 8° camera 7, passed through the input/output control section 4, encoded by the codec section 2, and sent from the transmission control section 3 through the line to the partner station. On the other party's side, the transmitted audio/image data is received by the transmission control section 3, encoded by the codec section 2, and then sent via the input/output control section 4 to the speaker 9. Output and play back to TV 6. To cancel the line link, use telephone 1 of either station.
This is done by hook-on of 0. In response, the system control units 5 of both stations instruct the input, encoding, transmission, reception, decoding, and termination of output reproduction of audio/image data.

[Problem that the invention seeks to solve]

Conventional data transmission equipment is configured as described above, so it is not possible to confirm the other party's station before transmitting and receiving audio and images, and it is not possible to confirm the other party's station after exchanging raw images. There was a problem where it became clear that the call was being made to the station.

This invention was made in order to solve the above-mentioned problems, and it not only makes it possible to confirm the other station before exchanging raw images, but also reduces the memory capacity to store data for this confirmation. The aim is to make it as small as possible.

Means for Solving Problem C] The data transmission device according to the present invention includes a memory unit 11 that encodes and stores arbitrary data, and a memory unit 11 that encodes and stores arbitrary data, and encodes raw data such as images and sounds stored in the memory unit 1. The device is characterized in that it includes a switching control section 51 that switches and outputs data.

[Effect]

Arbitrary data is encoded and stored in the memory unit 11 according to the present invention.

Here, the switching control section 5 switches and outputs the data stored in the memory section 11 before transmitting raw data to each other. As a result, the receiving side can confirm the other party by looking at an image based on the above data, and then send the raw data to the transmitting side.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Note that the same components as those in the prior art are given the same numbers and their explanations are omitted.

FIG. 1 is a block diagram showing one embodiment of the present invention9.
In the figure, 11 is a memory unit that encodes and stores arbitrary data, and 51 is a unit that transmits and receives the data stored in this memory unit 11, and switches between the transmitted and received audio and image data and the data in the memory unit 11. This is a switching control section that outputs

Here, the switching control section 51 is located within the system control section 5. In this embodiment, the semitone image transmission device is provided with a key bat 12 for transmitting user's instructions.

FIG. 2 is a detailed block diagram of the audio image transmission device main body 1, which includes the memory section 11 and the switching control section 51. Convert to data A
/D conversion unit, 14 is a coder that encodes the digital image data with high efficiency, 15 is a latch A that latches the digital image data encoded by the coder 14, and 16 is the digital image data that is highly efficiently encoded. 17 is a D/A conversion unit that converts digital image data into a television signal; 18 is a latch B that latches this data before reading the data from the memory unit 11; 19 is a RAM for storing data, 2
0 is an address generator that generates the address of RAM 19;
Reference numeral 21 denotes a latch C122 for latching data before writing it into the memory section 11, and a return switch for switching the transmission path between the line side and the return side.

Here, A/D conversion word 13. Coder 14° latch A15. Decoder 16. D/A conversion converter 17-located in deck unit 2, latch B18°RAM19. Address generation section 20. The latch C21 is located within the memory section 11, and the return switch 22 is located within the transmission control section 3.

Next, the operation will be explained.

First, the case of storing arbitrary image data in the memory section 11 will be explained with reference to the flowchart of FIG.

When the power of this device I is turned on, the switching control section 51 in the system control section 5 latches the latch A15. Close latch B18 and latch C21.

Here, when the user instructs the start of recording operation using the keypad 12, the switching control section 51 responds to the instruction by latch A15.
Open the latch C21, turn the return switch 22 to the ON side, set the RAM 19 to write mode, and address generation section 2
0 to instruct RAM address generation in synchronization with image data. As a result, the analog camera signal input from the camera 7 is converted into digital image data by the A/D converter 13, and then encoded with high efficiency by the coder 14.
15, is turned back by the turn-back switch 22 at the transmission control unit 3, and enters the decoder 16 and latch C21. The data entering the decoder 16 is decoded into digital image data, converted into an analog television signal by the D/A converter 17, and displayed on the television 6. The data that has entered the latch C21 enters the address generation section 20, and is written into the RAM 19 at the address generated there.

A timing chart for writing data to the memory section 11 is shown in FIG.

Next, operations during communication with other stations will be explained with reference to the flowchart of FIG.

By hooking off the handset of the telephone 10 of the originating station and dialing the other party's station number, the lines between the originating station and the receiving station are connected. At this point, the receiver of the receiving station is hooked off (st
ep 1), and in response, the system control units 5 of both the transmitting and receiving stations close the latch Bi8 and open the latch A15. latch C21 is closed), (step 2). As a result, any response screen data written in the RAM 19 passes through the latch B18, enters the transmission control section 3, and is sent out to the line, and is received by the transmission control section 3 of the other station.
The signal is decoded by the decoder 16, converted into an analog television signal by the D/A converter 17, and displayed on the television 6.

After that, if the user on the receiving station side wishes to exchange raw images, he/she instructs permission to exchange raw images using the key bat 12 (st
ep 3). Upon receiving this, the system control units 5 of both stations close the latch B18 and open the latch A15 to stop address generation (step 4). This creates a conversation mode in which images from each other's cameras are exchanged, just like the usual conventional one (
step 5).

In the above embodiment, the write data to the memory section was input from the camera, but the ROM prepared by a separate writing device may also be used.
etc. Also, in the above embodiment, the data stored in the memory section was image data, but this could also be audio data,
Alternatively, audio/image data may be used, and the same effect as in the case of only image data can be achieved. In addition, although the above embodiment shows how to use the response screen to confirm the other party's station before sending a raw image, the same configuration can also be used for other purposes such as answering machines, automatic message transmission using memory data, etc. .

〔Effect of the invention〕

As described above, according to the present invention, since the switching control unit is provided which switches and outputs raw image and audio data and data in the memory unit, the receiving side receives the data sent from the transmitting side from the memory unit. By checking the image, it is possible to recognize the other station's i'i before exchanging raw images, and it is also possible to minimize the memory capacity for storing data for this stone i8.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a detailed block diagram of the main body of the audio image transmission device in FIG. 1, and FIG. 3 is a flowchart showing the operation of writing data to the memory section. FIG. 4 is a timing chart for writing the data, FIG. 5 is a flowchart showing the data transmission/reception and output operations of the memory section 11, and FIG. 6 is a block diagram of a conventional data transmission device. DESCRIPTION OF SYMBOLS 1... Audio image transmission device body, 2... Codec section, 3... Transmission control section, 4... Input/output horn control section, 5
... System system? ff1 part, 11... memory part, 5
1...Switching control section. Note that the same or corresponding numbers in the drawings indicate the same or corresponding components. Agent Masu Oiwa Who (and 2 others) Figure 3 Atsushi Figure 5 Procedural amendments imported) 21 Name of the invention Data transmission device 3 Relationship with the person making the amendment Case Moriya Shiki, representative of the patent applicant 4; Agent Address: 5, Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo, Detailed description of the invention to be amended and drawings section. 6. Contents of amendment fl) Page 9, line 18 of the specification, ``According to the invention, raw images'' was replaced with ``According to the invention, a memory section for storing encoded data and a raw image. "Image" and correct it. (2) The drawings and Figure 4 shall be amended as shown in the attached sheet. that's all

Claims (1)

[Claims] A data transmission device that encodes and transmits image data and audio data captured by a camera from a transmitting side, and stores the encoded data in a data transmission device that decodes the received data and outputs it to an output device. 1. A data transmission device comprising: a memory section; and a switching control section that switches between image data and audio data captured by the camera to be transmitted and data in the memory section and outputs the same to a receiving side.