KR100386571B1 - Method and Telephone for still picture transport - Google Patents

Abstract

The present invention relates to a video terminal and a video transmission method using the same, which is suitable for transmitting a video between mobile terminals using a short message service. The video terminal according to the present invention includes a camera unit for capturing a video, an encoder for outputting still image data by still image encoding the captured video, a code converter for converting the output still image data into JPEG data; And a short message generating unit for dividing the converted JPEG data into a plurality of short messages having the same identification information, and a wireless unit transmitting the generated short messages in a wireless section. It is possible to transmit / receive, thereby increasing the versatility of the video terminal, and also has the effect of providing various additional services to the user.

Description

Video terminal and video transmission method using the same {Method and Telephone for still picture transport}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal, and more particularly, to a video terminal and a video transmission method using the same, which are suitable for transmitting a video between mobile terminals using a short message service.

1 is a block diagram of a conventional video terminal.

Referring to FIG. 1, a conventional video terminal wirelessly converts a camera unit 101 into which a video is input, an encoder 102 encoding a video output from the camera unit 101, and video data output from the encoder 102. It is composed of a wireless unit 103 for transmitting to the interval.

The encoder 102 encodes the video according to the H.263 or MPEG-4 standard.

The video terminal configured as described above transmits / receives a video according to the procedure of FIG. 2.

Referring to Figure 1, first, the sending terminal makes a call to the receiving terminal and requests a call (S200). At this time, if the receiving terminal receives a call, the call is set (S201). Thereafter, an image is transmitted / received between the transmitting terminal and the receiving terminal (S202).

Meanwhile, the voice message service using the short message service (SMS) in the mobile terminal is performed according to the procedure shown in FIG. 3.

Referring to FIG. 3, the transmitting mobile terminal requests a call to the receiving mobile terminal (S300). At this time, if the receiving mobile terminal does not answer the call, the sending mobile terminal leaves the voice message in the voice mailbox (S301).

Then, the system notifies the receiving mobile terminal that the voice message has arrived through the Short Message Service (SMS) (S302).

The receiving mobile terminal accesses the short message service center (SMSC) and checks the stored voice message (S303).

The text message service using the short message service in the mobile terminal is performed according to the procedure shown in FIG.

Referring to FIG. 4, the transmitting-side mobile terminal inputs a string by operating a keypad and transmits the inputted string to the receiving-side mobile terminal as a text message (S400).

The receiving mobile terminal stores the transmitted text message. At this time, the short message service center (SMSC) of the system transmits a short message indicating that the text message has arrived to the receiving mobile terminal (S401).

Then, the receiving mobile terminal checks the stored text message (S402).

As described above, the conventional mobile terminal provides a voice message service or a text message service using a short message service.

5 is a structural diagram of a conventional short message.

Referring to FIG. 5, the short message includes a transport layer and a teleservice layer.

The transport layer includes a message type field 500, a teleservice identifier field 501, an origination address field 502, and a destination address field. field 503 and a bearer data field 504.

The delivery data field 504 may include a message identifier field 505, a user data field 506, a reply option field 507, and a callback number. Field (508).

The user data field 506 is composed of a message encoding field 509 and a CHARi field 510 into which short message data is inserted, and the message encoding field 509 and the CHARi field 510. As a short message (SMS message) is configured.

Meanwhile, in a code division multiple access (CDMA) mobile communication system, the short message is transmitted as a data burst message, and when the data burst message is transmitted through an access channel, the short message is 100 bytes or less. It has a length, and when transmitted through a traffic channel, it has a length of 256 bytes or less.

However, since the conventional video terminal and the mobile terminal cannot transmit / receive images with each other, the use of the video terminal is limited. That is, since the video terminal can transmit the video only to the same type of video terminal having the video codec, there is a problem that the video terminal cannot be used to transmit / receive the video with the commercially available mobile terminals.

In addition, the short message service of the above-described mobile terminal is used only for transmitting a text message or confirming a voice message.

Accordingly, an object of the present invention is to provide a video terminal for transmitting / receiving an image between a video terminal and a general mobile terminal using a short message service, and a video transmission method using the same. It is to provide.

According to a configuration feature of the present invention for achieving the above object, the video terminal includes a camera unit for capturing a video, an encoder for outputting still image data by encoding the captured video still image, the output still image A code converter for converting the data into JPEG data, a short message generator for dividing the converted JPEG data into a plurality of short messages having the same identification information, and a wireless unit for transmitting the generated short messages to a wireless section. It is composed.

According to a method feature of the present invention for achieving the other object as described above, the image transmission method according to the present invention comprises a first step of capturing a moving picture, and a method for outputting still image data by still image coding the captured video; A second step of converting the output still image data into JPEG data, a fourth step of dividing the converted JPEG data into a plurality of short messages having the same identification information, and the generated plurality The fifth step of transmitting the short message to the wireless section is made.

1 is a block diagram of a conventional video terminal.

2 is a flowchart illustrating a video transmission procedure of the video terminal shown in FIG.

3 is a flowchart illustrating a voice message service procedure of a conventional mobile terminal.

4 is a flowchart illustrating a text message service procedure of a conventional mobile terminal.

5 is a structural diagram of a conventional short message.

6 is a block diagram of a video terminal according to a first embodiment of the present invention;

7 is a block diagram of a video terminal according to a second embodiment of the present invention;

8 is a block diagram of a video terminal according to a third embodiment of the present invention;

9 is a structural diagram of a short message according to the present invention;

* Description of the symbols for the main parts of the drawings *

601 camera unit 602 encoder

603: code converter 604: short message generating unit

605: Vocoder 606, 611: Radio part

612: Short message assembly unit 613: JPEG encoder

614: playback unit

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention proposes a video terminal for transmitting / receiving an image between a video terminal and a general mobile terminal using a short message service and a video transmission method using the same.

In particular, the video terminal according to the present invention includes a code converter for outputting the image as JPEG data to transmit a still image according to the JPEG standard, and the mobile terminal includes a JPEG decoder to reproduce the still image according to the JPEG standard. .

At this time, the present invention transmits a still image using a short message.

Hereinafter, a video terminal and an image transmission method according to the present invention will be described.

First embodiment

6 is a block diagram of a video terminal according to the present invention.

Referring to FIG. 6, the video terminal 600 according to the first embodiment of the present invention is a still picture coding (I Picture Coding) for a camera unit 601 to which a video is input and a video output from the camera unit 601. The encoder 602 for outputting the still image data, the code converter 603 for converting the still image data output from the encoder 602 into JPEG data, and the JPEG data output from the code converter 603. A short message generating unit 604 for dividing and generating a plurality of short messages having the same identification information, a vocoder 605 for detecting a call amount to control the transmission of the generated short message, and the generated short message It consists of a wireless unit 606 for transmitting in a wireless section.

In addition, the mobile terminal 610 is a wireless unit 611 for receiving a short message, and a short message assembly unit for assembling short messages having the same identification information among the received short messages to extract JPEG data for one image ( 612, a JPEG decoder 613 for decoding extracted JPEG data and outputting image data, and a playback unit 614 for displaying image data output from the JPEG decoder 613.

The video transmission procedure between the video terminal 600 and the mobile terminal 610 configured as described above is as follows.

First, the video terminal 600 receives a video through the camera unit 601. The camera unit 601 transmits the input video to the encoder 602, and the encoder 602 outputs still image data by performing I picture coding for encoding the first frame of the video.

Subsequently, the code converter 603 converts the output still image data into JPEG data and outputs the converted message to the short message generator 604. The short message generator 604 generates a video message datagram using the JPEG data. Since the video message datagram is larger than the short message, it is divided into a plurality of segments, and each segment is added to the Chari field of the short message after adding header information of one video to distinguish the receiver. . Accordingly, the short message generating unit 604 divides one JPEG data into a plurality of short messages having the same identification information, that is, identification information of one video message datagram, and outputs the divided messages.

The plurality of short messages output from the short message generator 604 are transmitted through the wireless unit 606.

Here, the wireless unit 606 transmits the short message output from the short message generating unit 604 according to the same protocol as the existing short message, but sets the MSG_ENCODING Type of the short message to a specific value (for example, Octet, Unspecified (0000)). Set to) to send. Therefore, the receiving mobile terminal 610 may distinguish the text message from the MSG_ENCODING Type.

The vocoder 605 detects a current voice call amount by checking a flag when transmitting a short message and provides the information to the wireless unit 606, and the wireless unit 606 transmits the short message according to the information provided by the vocoder 605. Regulate the transmission of

Meanwhile, the mobile terminal 610 receives a plurality of short messages transmitted from the video terminal 600 through the wireless unit 611.

The received plurality of short messages are sent to the short message assembly 612, and the short message assembly 612 assembles the short messages having the same identification information into one video message datagram. JPEG data is then extracted from the video message datagram.

The extracted JPEG data is then decoded by the JPEG decoder 613 and then displayed by the playback unit 614.

At this time, when the playback unit 614 is black and white, the JPEG decoder 613 decodes the JPEG data into black and white bitmap data to display a black and white image.

Meanwhile, although not shown in the drawing, the short message assembly unit 612 includes a separate datagram storage unit (not shown) and sequentially stores the video message datagrams assembled according to the identification information, and then a user desired time point. You can also output the video message datagram stored in.

Meanwhile, the mobile terminal 610 may store the JPEG image by itself and transmit the JPEG image to the video terminal 600 at the point of time desired by the user using the short message in the same manner as described above. In this case, when the mobile terminal 610 transmits the already stored JPEG image, the short message assembly unit 612 serves as the short message generating unit 604 of the video terminal 600.

Second embodiment

The video terminal proposed in the second embodiment does not include a code converter. On the other hand, the mobile terminal has a code converter. That is, the video terminal transmits the still picture data generated by the I picture coding as a short message, converts the still picture data received from the mobile terminal into JPEG data, and displays the converted picture.

7 is a block diagram of a video terminal according to a second embodiment of the present invention.

Referring to FIG. 7, the video terminal 700 according to the second embodiment of the present invention may include still picture coding (I Picture Coding) on a camera unit 701 to which a video is input and a video output from the camera unit 701. An encoder 702 for outputting still image data, a short message generator 703 for dividing the still image data output from the encoder 702 into a plurality of short messages having the same identification information, and the generated In order to control the transmission of the short message, it is composed of a vocoder 704 that senses a call volume, and a wireless unit 705 which transmits the generated short message to a wireless section.

In addition, the mobile terminal 710 combines the wireless unit 711 for receiving a plurality of short messages from the video terminal 700 and the short messages having the same identification information among the received short messages, thereby obtaining a still image of one image. A short message assembly unit 712 for extracting data, a code converter 713 for converting the extracted still image data into JPEG data, a JPEG decoder 714 for decoding the converted JPEG data and outputting image data; And a playback unit 715 for displaying the video data output from the JPEG decoder 714.

The video transmission procedure between the video terminal 700 and the mobile terminal 710 configured as described above is the same as that described in the first embodiment.

However, in the second embodiment, since the code converter 713 is provided in the mobile terminal 710, the video terminal 700 divides the encoded still image data into a plurality of short messages and transmits the received mobile terminal 710. After extracting the still image data from the short message, it is converted into JPEG data and displayed.

Third embodiment

In the third embodiment, the video terminal and the mobile terminal do not include a code converter and a JPEG decoder for processing JPEG data.

8 is a block diagram illustrating a video terminal according to a third embodiment of the present invention.

Referring to FIG. 8, the video terminal 800 according to the third embodiment of the present invention is a still picture coding (I Picture Coding) for a camera unit 801 to which a video is input and a video output from the camera unit 801. An encoder 802 for outputting still image data, a short message generator 803 for dividing the still image data output from the encoder 802 into a plurality of short messages having the same identification information, and the generated In order to control the transmission of the short message, it is composed of a vocoder 804 for detecting a call volume and a wireless unit 805 for transmitting the generated plurality of short messages in a wireless section.

In addition, the mobile terminal 810 may combine a wireless unit 811 for receiving a plurality of short messages and a short message having the same identification information among the received short messages to extract still image data for one image. And an assembly unit 812, a decoder 813 for still image decoding the extracted image data, and a playback unit 814 for displaying the decoded image data.

The video transmission procedure between the video terminal 800 and the mobile terminal 810 configured as described above is the same as that described in the first embodiment.

However, the video terminal 800 according to the third exemplary embodiment divides and transmits the still image data output from the encoder 802 into a plurality of short messages, and the mobile terminal 810 assembles and receives a plurality of received short messages. Image data is extracted, decoded and displayed.

As described above, the video terminals described in the first, second and third embodiments are divided into a plurality of short messages and transmitted, and the mobile terminal receives the short messages and plays the video.

The structure of the short message is as shown in FIG.

9 is a structural diagram of a short message according to the present invention.

Referring to FIG. 9, the present invention generates a video message datagram to transmit still image data as a short message.

The video datagram is divided into a plurality of segments 916, 917, 918, and 919 according to the size of the short message. At this time, the identification information of the encoder is inserted into the first segment 916.

In addition to the first segment 916, the remaining segments 917, 918, and 919 are added with header information for identifying the segment for one video message datagram when the receiving side assembles each segment. This header information is composed of message identification information (Message_ID) 911, segment length information (MAX Segment) 912, segment number information (Segment number) 913, and datagram identification information (Datagram_ID) 914.

Each segment 916, 917, 918, 919 is inserted into the CHARi field 910 of the short message, respectively.

Therefore, one still image data is transmitted to the mobile terminal as a plurality of short messages.

As described above, the video terminal and the video transmission method according to the present invention have the following effects.

First, since a still image can be transmitted / received during a call or a standby by using a short message service between a video terminal and a general mobile terminal, it is possible to provide a variety of additional services to a user.

Second, since the video can be transmitted between the video terminal used in the next generation mobile communication system (IMT-2000) and the existing mobile terminal, the versatility of the video terminal increases.

Third, the mobile terminal can identify the user of the video terminal.

Fourth, it can be implemented by changing the software.

Claims (6)

Camera unit for capturing video, An encoder for outputting still image data by encoding a still image of the captured video; A code converter for converting the output still image data into JPEG data; A short message generating unit for dividing the converted JPEG data into a plurality of short messages having the same identification information; And a wireless unit for transmitting the generated short message to a wireless section. The video terminal of claim 1, further comprising a vocoder configured to detect a call amount and provide call amount information detected by the wireless unit to control transmission of the generated short message. The video terminal of claim 1, wherein the video terminal comprises: A wireless unit for receiving a short message, A short message assembly unit for assembling short messages having the same identification information among the received short messages to extract JPEG data; A decoder which outputs image data by decoding the extracted JPEG data; And a playback unit for displaying the output image data. The first step in capturing the video, A second step of outputting still image data by still image encoding the captured video; Converting the output still image data into JPEG data; A fourth step of dividing the converted JPEG data into a plurality of short messages having the same identification information; And a fifth step of transmitting the generated plurality of short messages to a wireless section. The method of claim 4, wherein in the fifth step, And transmitting a specific value for notifying that the image is to be transmitted to the generated short message. 5. The method of claim 4, further comprising: receiving a short message; A seventh step of determining whether the received short message is for image transmission; An eighth step of assembling short messages having the same identification information and extracting JPEG data for one image if the received short message is for image transmission; A ninth step of outputting image data by decoding the extracted JPEG data; And a tenth step of reproducing the output image data.