KR20060035934A - Method for providing streaming service and apparatus of enabling the method - Google Patents

Abstract

The present invention relates to a method and apparatus for continuously providing a streaming service by transmitting appropriate multimedia data according to a transmission and reception state of data when providing a streaming service.

In a streaming service performing apparatus connected to a streaming service providing server providing a streaming service for multimedia data of various capacities according to an exemplary embodiment of the present invention, a streaming service method provides a streaming service request for a predetermined content. Transmitting to a server, wherein the streaming service request includes information on a type of content to be streamed, a quality of the content, or capacity information of multimedia data corresponding to the content; Receiving predetermined multimedia data from the streaming service providing server; Transmitting a transmission status notification message for the received multimedia data to the streaming service providing server, wherein the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; And playing the received multimedia data, wherein the streaming service providing server checks a transmission / reception time information field value from the received transmission status notification message; Comparing the checked field value with a predetermined threshold; Determining a quality of multimedia data to be transmitted according to the comparison result; And transmitting the multimedia data corresponding to the determined quality to the streaming service performing device.

The present invention can provide a continuous streaming service by minimizing the interruption of the reproduction of the multimedia data or the buffering operation caused by the exhaustion of the received data generated during the streaming service.

Multimedia data, quality, streaming service, continuous, playback

Description

METHOD FOR PROVIDING STREAMING SERVICE AND APPARATUS OF ENABLING THE METHOD}

1 is a diagram illustrating a schematic configuration diagram of a general streaming service providing system.

2 is a flowchart illustrating a conventional streaming service providing method.

3 is a diagram illustrating a configuration of a streaming service performing apparatus for performing a streaming service according to an embodiment of the present invention.

4 is a diagram illustrating a configuration of a streaming service providing server for providing a streaming service according to an embodiment of the present invention.

5 is a flowchart illustrating a streaming service providing method according to an embodiment of the present invention.

6 is a flowchart illustrating a streaming service performing method in a streaming service performing apparatus according to an embodiment of the present invention.

7 is a flowchart illustrating a streaming service providing method in a streaming service providing server according to an embodiment of the present invention.

8 is a flowchart illustrating a streaming service providing method in a streaming service providing system according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: device for performing streaming service

120: network

130: streaming service providing server

310: message generating unit

320, 430: transceiver

330: playback unit

410: storage unit

420: control unit

The present invention relates to a method and apparatus for providing a streaming service, and more particularly, to a method for continuously providing a streaming service by transmitting appropriate multimedia data according to a data transmission / reception state when providing a streaming service. Relates to a device.

In general, a streaming service is a service that reproduces multimedia data such as music or video on a predetermined network in real time, and transmits the multimedia data to a streaming service performing apparatus at a predetermined transmission rate from a streaming service providing server. The service performing apparatus reproduces the received multimedia data in real time.

FIG. 1 is a schematic block diagram of a general streaming service providing system. The streaming service providing system includes a streaming service performing apparatus 110, a streaming service communication network 120, and a streaming service providing server 130.

Referring to FIG. 1, when the user desires a streaming service, the streaming service performing apparatus 110 requests a streaming service for predetermined multimedia data to the streaming service providing server 130 through the communication network 120. The communication network 120 is a communication network between the streaming service performing apparatus 110 and the streaming service providing server 130. When the streaming service performing apparatus 110 is a wired terminal, the communication network 120 is implemented as a wired network, and the streaming service performing apparatus 110 is wireless. In the case of a terminal, it may be implemented as a wireless network. The streaming service providing server 130 provides a streaming service for multimedia data to the streaming service performing apparatus 110 that has requested the streaming service through the streaming service communication network 120.

When the streaming service increases the number of users who have requested the streaming service for the same content simultaneously, the streaming service becomes slow to transmit the multimedia data as the multimedia data is overloaded. As a result, in the streaming service performing apparatus 110, there is a problem in that buffering occurs severely when playing the multimedia data due to the deterioration of the transmission speed of the multimedia data.

Therefore, in order to provide a smooth streaming service, it is necessary to adjust the transmission speed of multimedia data corresponding to the content to provide the streaming service in consideration of the situation of the streaming service communication network or the buffer amount of the streaming service performing apparatus.

2 is a flowchart illustrating a conventional streaming service providing method, and a conventional streaming service providing method is a method of adjusting a transmission speed of multimedia data transmitted in consideration of a situation of a streaming service communication network or a buffer amount of a streaming service performing apparatus.

Investigate the queuing buffer of the streaming service performing device at every X-RTCP duration among the SDP fields sent from the streaming service providing server to the streaming service performing device, and include the remaining data in the buffer in the RTCP Sender Report message. Send to streaming service server.

Referring to FIG. 2, the apparatus for performing streaming service periodically transmits an RTCP Sender Report message (210, 230, 250), and the streaming service providing server transmits multimedia data to provide a streaming service (220, 240, 260). ). The apparatus for performing streaming service receives multimedia data transmitted from the streaming service providing server and buffers the multimedia data due to a drop in transmission speed of the received multimedia data when periodically checking the transmission state of the multimedia data. ) Is performed, the information is included in the RTCP Sender Report message and transmitted to the streaming service providing server (230). The streaming service providing server detects a buffer amount and a network condition of the streaming service performing device by checking a period field value of an RTCP Sender Report message transmitted from the streaming service performing device, and provides a bit-rate for multimedia data to be transmitted. adjust the rate. If the period is less than or equal to a predetermined threshold, the streaming service providing server adjusts the bit-rate for the multimedia data to be transmitted downward (231), and transmits the multimedia data according to the downward adjusted bit rate. In contrast, the streaming service providing server adjusts the bit-rate upward when the period is greater than the threshold (251), and transmits the multimedia data according to the adjusted bit rate, thereby the streaming service performing apparatus provides a streaming service. Perform continuously

As such, the conventional streaming service providing method transmits multimedia data by adjusting the bit rate down at the streaming providing server when the buffer is exhausted, and continues buffering until the adjusted multimedia data arrives at the streaming service performing apparatus. There is a problem that the user must wait for the streaming service because the operation must be performed. In addition, the conventional streaming service providing method has a problem that the user's dissatisfaction is increased by providing an unstable service because the buffering operation occurs frequently when the transmission state of the communication network is continuously poor.

The present invention has been made to solve the above problems of the prior art, the streaming for preventing the playback of multimedia data is stopped due to the exhaustion of the received data generated during the streaming service in the streaming service providing system It is an object of the present invention to provide a service providing method and an apparatus thereof.

In addition, an object of the present invention is to provide a streaming service providing method and apparatus for reducing a buffering phenomenon generated when performing a streaming service in a streaming service system.

In addition, an object of the present invention to provide a streaming service providing server information on the transmission and reception of multimedia data in the streaming service performing apparatus to determine the packet transmission state of the multimedia data to properly provide a streaming service corresponding thereto. It is done.

In addition, an object of the present invention is to determine the situation of the network in the streaming service providing system to transmit the multimedia data of the quality according to the situation so that the streaming service can be continuously provided in the streaming service performing apparatus.

In order to achieve the above object, a streaming service method in a streaming service performing apparatus associated with a streaming service providing server that provides a streaming service for multimedia data of various capacities according to an embodiment of the present invention is provided for a predetermined content. Transmitting a streaming service request to the streaming service providing server, wherein the streaming service request includes information on a type of content to be streamed, a quality of the content, or capacity of multimedia data corresponding to the content; Receiving predetermined multimedia data from the streaming service providing server; Transmitting a transmission status notification message for the received multimedia data to the streaming service providing server, wherein the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; And reproducing the received multimedia data in real time, wherein the streaming service providing server checks a transmission / reception time information field value from the received transmission status notification message; Comparing the checked field value with a predetermined threshold; Determining a quality of multimedia data to be transmitted according to the comparison result; And transmitting the multimedia data corresponding to the determined quality to the streaming service performing apparatus.

In addition, a streaming service method in a streaming service providing server that provides a streaming service for multimedia data of various capacities to a device for performing a predetermined streaming service according to another embodiment of the present invention may be applied to a predetermined content from the streaming service performing device. Receiving a streaming service request for the service; Transmitting predetermined multimedia data in response to the streaming service request; Receiving a transmission status notification message for the transmitted multimedia data from the streaming service performing apparatus, wherein the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; ; Analyzing the transmission / reception time information field value; Comparing the analyzed field value with a predetermined threshold; Determining a quality of multimedia data to be transmitted according to the comparison result; And transmitting the multimedia data corresponding to the determined quality to the streaming service performing apparatus, wherein the streaming service performing apparatus receives the transmitted multimedia data from the streaming service providing server; And reproducing the received multimedia data in real time.

In addition, the apparatus for performing a streaming service provided from a streaming service providing server according to another embodiment of the present invention is a message generator for generating the streaming service providing request message or the transmission status notification message-providing the streaming service The request message includes a type of multimedia data, quality information of the multimedia data, and the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; A transmission / reception unit for transmitting the streaming service providing request message or the transmission status notification message to the streaming service providing server and receiving multimedia data transmitted from the streaming service providing server; And a reproducing unit for reproducing the received multimedia data in real time, wherein the streaming service providing server checks the transmission / reception time information field value and compares the field value with a predetermined threshold for the quality of the multimedia data transmitted. And determine the quality of the multimedia data.

In addition, a system for providing a streaming service to a predetermined streaming service performing apparatus according to another embodiment of the present invention includes a storage unit for storing multimedia data corresponding to the content having two or more quality (capacity); Transmitting and receiving unit for transmitting to the streaming service performing apparatus for requesting the streaming service for the multimedia data of a predetermined quality, and receives a transmission status notification message informing the transmission state of the multimedia data from the streaming service performing apparatus-the transmission A status notification message includes a transmission / reception time information field measuring variation in transmission / reception time of a packet for the multimedia data; And checking the transmission / reception time information field value from the transmission status message, selecting the quality of the multimedia data according to a result of comparing the field value with a predetermined threshold, and performing the streaming service on the multimedia data corresponding to the selected quality. And a control unit for controlling to transmit to the device, wherein the streaming service performing device reproduces the received multimedia data in real time.

The streaming service performing apparatus widely used herein refers to a code division multiplexing access (CDMA) module, a Bluetooth module, such as a personal digital assistant (PDA), a smart phone, a handheld PC, a mobile phone, and the like. It is a concept that collectively includes a predetermined communication module such as an infrared communication module (IrDA), a wired / wireless LAN card, and a predetermined microprocessor for performing a multimedia playback function.

Hereinafter, a method and an apparatus for providing a streaming service according to the present invention will be described in detail with reference to the accompanying drawings.

3 is a diagram illustrating a configuration of a streaming service performing apparatus for performing a streaming service according to an embodiment of the present invention, wherein the streaming service performing apparatus 110 includes a message generator 310, a transceiver 320, and Regeneration unit 330 is included.

1 and 3, the message generator 310 generates a streaming service providing request message or a transmission status notification message. The streaming service provision request message includes a type of multimedia data for requesting a streaming service or quality information of the requested multimedia data. The type of the multimedia data is a type of music or video or a type of music or video file. The transmission status notification message includes a transmission / reception time information field measuring variation in transmission / reception time of the multimedia data packet. The transceiver 320 transmits the streaming service providing request message or the transmission status notification message to the streaming service providing server 130 through the communication network 120, and from the streaming service providing server 130 through the communication network 120. Receive the transmitted multimedia data. The playback unit 330 reproduces the received multimedia data in real time.

When the streaming service providing server 130 receives the transmission status notification message transmitted from the streaming service performing apparatus 110 through the communication network 120, the streaming service providing server 130 analyzes the transmission status notification message. The streaming service providing server 130 checks the transmission / reception time information field value included in the analyzed transmission status notification message and determines the quality of the multimedia data to be transmitted according to the result of comparing the field value with a predetermined threshold value. The multimedia data of the determined quality is transmitted to the streaming service performing apparatus 110 through the communication network 120. When the field value is smaller than the threshold, the streaming service providing server 130 transmits multimedia data having a lower quality than the transmitted multimedia data to the streaming service performing apparatus 110 through the communication network 120. The streaming service providing server 130 transmits the multimedia data having the same quality as the transmitted multimedia data to the streaming service performing apparatus 110 through the communication network 120 when the field value is greater than or equal to the threshold value.

4 is a diagram illustrating a configuration of a streaming service providing server for providing a streaming service according to an embodiment of the present invention, wherein the streaming service providing server 130 includes a storage unit 410, a control unit 420, and a transceiver unit. 430.

1 and 4, the storage unit 410 stores multimedia data corresponding to content having two or more quality (capacity). The storage unit 410 stores high quality (high capacity) multimedia data and low quality (low capacity) multimedia data, respectively, even in the case of multimedia data corresponding to the same type of content.

The transceiver 430 transmits the multimedia data of the requested quality to the streaming service performing apparatus 130 requesting a streaming service for multimedia data corresponding to a predetermined quality through the communication network 120. The transceiver 430 receives a transmission status notification message indicating a transmission status of the multimedia data from the streaming service performing apparatus 110 through the communication network 120. The transmission status notification message includes a transmission / reception time information field measuring variation in transmission / reception time of a packet for the multimedia data.

The controller 420 checks the transmission / reception time information field value from the transmission status notification message and selects the quality (capacity) of the multimedia data according to a result of comparing the field value with a predetermined threshold. The controller 420 controls the transceiver 430 to transmit the multimedia data corresponding to the selected quality (capacity) to the streaming service performing apparatus 110. If the field value is lower than the threshold, the controller 420 determines that the transmission state of the multimedia data currently being transmitted is not good, and streams multimedia data having a lower quality than the multimedia data being transmitted through the communication network 120. The transmitter / receiver 430 is controlled to transmit to the performing apparatus 110. If the field value is greater than or equal to the threshold, the control unit 420 determines that the transmission state of the multimedia data currently being transmitted is good, and the communication network 120 has a multimedia having a quality (capacity) higher than or equal to the multimedia data being transmitted. The transceiver 430 is controlled to transmit data.

The streaming service performing apparatus 110 receives the multimedia data transmitted from the streaming service providing server 130 through the communication network 120 and reproduces the received multimedia data in real time. The streaming service performing apparatus 110 transmits a transmission status notification message indicating the transmission status of the received multimedia data to the streaming service providing server 130 through the communication network 120.

FIG. 5 is a flowchart illustrating a streaming service providing method according to an embodiment of the present invention, in which a streaming service performing apparatus transmits a Real-Time Transport Control Protocol (RTCP) sender report message to a streaming service providing server The streaming service providing server transmits the multimedia data to the streaming service performing apparatus.

1 and 5, in operation 510, the streaming service performing apparatus 110 may transmit an RTCP Sender Report message to the streaming service providing server 130 to inform the transmission status of data currently transmitted and received through the communication network 120. To send).

In step 511, the streaming service providing server 130 receives the RTCP Sender Report message and checks the interval Jitter field value of the received RTCP Sender Report message. The RTCP Sender Report message is a message used to inform statistical information about its transmission and reception, and the interval jitter field records a variation measurement value for a transmission / reception time of an RTCP data packet.

In operation 520, the streaming service providing server 130 transmits the multimedia data requested from the streaming service performing apparatus 110 to the streaming service performing apparatus 110 through the communication network 120.

In operation 530, the apparatus 110 for performing streaming service reproduces the received multimedia data in real time and provides a streaming service through the communication network 120 with an RTCP Sender Report message to inform the transmission status of the received multimedia data. Send to server 130.

In operation 531, the streaming service providing server 130 provides content of lower quality than the multimedia data transmitted in operation 520 when the value of the interval jitter included in the received RTCP sender report message is smaller than a predetermined threshold. Control as possible.

In operation 540, the streaming service providing server 130 transmits the multimedia data corresponding to the content having a lower quality than the transmitted multimedia data to the streaming service performing apparatus 110 through the communication network 120.

In operation 541, the apparatus 110 for performing streaming service receives multimedia data corresponding to low quality content transmitted from the streaming service providing server 130 and reproduces multimedia data corresponding to the low quality content in real time. do.

In operation 550, the apparatus 110 for performing streaming service transmits an RTCP Sender Report message to the streaming service providing server 130 through the communication network 120 to inform the transmission state of the received multimedia data.

In operation 551, the streaming service providing server 130 may set content of the same quality as the multimedia data transmitted in operation 520 when the value of the interval jitter included in the received RTCP sender report message is greater than or equal to a predetermined threshold. To be provided.

In operation 560, the streaming service providing server 130 transmits the multimedia data corresponding to the content having the same original quality as the multimedia data transmitted in operation 520 to the streaming service performing apparatus 110 through the communication network 120. .

The streaming service performing apparatus 110 receives multimedia data corresponding to the content of the original quality and reproduces the multimedia data in real time.

As such, when the streaming service performing apparatus 110 transmits a transmission status notification message for informing the transmission status of the multimedia data transmitted from the streaming service providing server 130, the streaming service providing server 130 may transmit the transmission status. The quality of the content to be transmitted is determined according to the transmission state of the multimedia data included in the notification message. When the streaming service providing server 130 transmits the multimedia data corresponding to the determined quality of the content to the streaming service performing apparatus 110 through the communication network 120, the streaming service performing apparatus 110 receives the multimedia data Play in real time.

FIG. 6 is a flowchart illustrating a streaming service performing method in a streaming service performing apparatus according to an embodiment of the present invention. The streaming service performing apparatus reproduces multimedia data received in real time after requesting a streaming service and receives the received multimedia. The transmission status notification message corresponding to the transmission status of the data is transmitted to the streaming service providing server.

1 and 6, in operation 610, when the streaming service performing apparatus 110 receives a streaming service request for a predetermined content from a user, the streaming service for the content is provided in response to the communication network 120. Request to the streaming service providing server 130 through. When the streaming service request includes the multimedia data of various quality (capacity) such as high quality (high capacity) and low quality (low capacity), the multimedia data having a desired quality (capacity) may be selected. When the streaming service providing server 130 receives a request for providing the streaming service for the content from the streaming service performing apparatus 110, the streaming service providing server 130 transmits the multimedia data of the selected quality corresponding to the content.

In operation 620, the apparatus 110 for performing streaming service receives multimedia data transmitted from the streaming service providing server 130 through the communication network 120.

In operation 630, the apparatus 110 for performing streaming service transmits a transmission state notification message corresponding to the transmission state of the received multimedia data to the streaming service providing server 130 through the communication network 120. The streaming service providing server 130 checks the transmission / reception time information field value from the received transmission status notification message, and determines the quality of multimedia data to be transmitted according to a result of comparing the checked field value with a predetermined threshold value. The multimedia data corresponding to the determined quality is transmitted to the streaming service performing apparatus 110 through the communication network 120. The streaming service providing server 130 may transmit multimedia data of lower quality (capacity) than previously transmitted multimedia data when the transmission / reception time information field value is lower than a predetermined threshold. When the transmission / reception time information field value is lower than a predetermined threshold, when the transmission speed of the communication network 120 is lower than the previous transmission speed and multimedia data of the same quality is continuously transmitted, the received multimedia information is transmitted by the streaming service performing apparatus 110. Since buffering may be generated by the data, the streaming service providing server 130 reduces the transmission capacity by lowering the quality of the transmitted multimedia data.

In operation 640, the apparatus 110 for performing streaming service receives multimedia data of lower quality than before from the streaming service providing server 130 when the transmission rate is lower than the previous transmission rate when the transmission status notification message is transmitted. Play multimedia data in real time.

7 is a flowchart illustrating a streaming service providing method in a streaming service providing server according to an embodiment of the present invention, wherein the streaming service providing server transmits multimedia data corresponding thereto when a streaming service request is received from a streaming service performing apparatus. After receiving and analyzing the transmission status notification message, the multimedia data having the quality determined according to the transmission status of the multimedia data is transmitted.

1 and 7, in operation 710, the streaming service providing server 130 receives a streaming service request for predetermined content from a streaming service performing apparatus through the communication network 120. The streaming service request for the content includes information on the type of content to receive the streaming service and the quality (capacity) of the multimedia data corresponding to the content.

In operation 720, the streaming service providing server 130 transmits multimedia data corresponding to the type and quality of the selected content to the streaming service performing apparatus 110 through the communication network 120 in response to the received streaming service request. .

In operation 730, the streaming service providing server 130 receives a transmission status notification message corresponding to a transmission status of the multimedia data transmitted from the streaming service performing apparatus 110 through the communication network 120. The transmission status notification message includes a transmission / reception time information field measuring variation in transmission / reception time of the multimedia data packet.

In operation 740, the streaming service providing server 130 analyzes the transmission / reception time information field value included in the received transmission status notification message, and compares the analyzed field value with a predetermined threshold.

In operation 750, the streaming service providing server 130 determines the quality of the multimedia data transmitted according to the analysis result of the transmission status notification message.

In operation 760, the streaming service providing server 130 transmits the multimedia data corresponding to the determined quality to the streaming service performing apparatus 110 through the communication network 120. The streaming service performing apparatus 110 receives multimedia data corresponding to the determined quality from the streaming service providing server 130 through the communication network 120 and plays the data in real time.

8 is a flowchart illustrating a streaming service providing method in a streaming service providing system according to an exemplary embodiment of the present invention, and a procedure of an operation performed by data or a message transmitted and received between a streaming service performing apparatus and a streaming service providing server. Indicates.

1 and 8, in operation 811, the streaming service performing apparatus 110 receives a streaming service request for a predetermined content from a user, and sends the streaming service request to the streaming service providing server through the communication network 120. Send to 130. The streaming service request includes setting information on the type of content and the quality (capacity) of the content to receive the streaming service.

In operation 821, the streaming service providing server 130 receives the streaming service request transmitted from the streaming service performing apparatus 110 through the communication network 120. In operation 822, the streaming service providing server 130 transmits multimedia data corresponding to the type and quality of the content selected according to the streaming service request to the streaming service performing apparatus 110 through the communication network 120.

In operation 812, the streaming service performing apparatus 110 receives multimedia data transmitted from the streaming service providing server 130 through the communication network 120. In operation 813, the streaming service performing apparatus 110 transmits a transmission status notification message corresponding to the transmission status of the received multimedia data to the streaming service providing server 130 through the communication network 120. The transmission status notification message includes a transmission / reception time information field measuring variation in transmission / reception time of the multimedia data packet.

In operation 823, the streaming service providing server 130 receives a transmission status notification message transmitted from the streaming service performing apparatus 110 through the communication network 120. In operation 824, the streaming service providing server 130 analyzes the received transmission status notification message and checks the transmission / reception time information field value. In operation 825, the streaming service providing server 130 compares the transmission / reception time information field value with a predetermined threshold value to determine whether the field value is smaller than the threshold value. If the field value is smaller than the threshold, in step 826, the streaming service providing server 130 changes the multimedia data to be transmitted to content of lower quality than the content currently being transmitted, and changes the content to the lower quality through the communication network 120. Is transmitted to the streaming service performing apparatus 110. When the field value is smaller than the threshold, the streaming service providing server 130 transmits multimedia data having a capacity lower than that of the multimedia data currently being transmitted.

In operation 815, the streaming service performing apparatus 110 receives multimedia data corresponding to the content changed to the low quality transmitted from the streaming service providing server 130 through the communication network 120. In operation 816, the apparatus 110 for performing streaming service plays the received multimedia data in real time. In operation 817, the streaming service performing apparatus 110 transmits a transmission status notification message for the received multimedia data to the streaming service providing server 130 through the communication network 120.

In operation 827, the streaming service providing server 130 receives a transmission status notification message transmitted from the streaming service performing apparatus 110 through the communication network 120. In operation 828, the streaming service providing server 130 compares the transmission / reception time information field value included in the transmission status notification message with a predetermined threshold to determine whether the field value is greater than or equal to the threshold. If the field value is greater than or equal to the threshold, in step 829, the streaming service providing server 130 transmits the content having higher quality than the content currently being transmitted or the initially set (original) quality (capacity) upon the streaming service request. Change the multimedia data, and transmit the multimedia data corresponding to the content changed to the high quality or the first set quality through the communication network 120 to the streaming service performing apparatus 110. The content currently being transmitted is of lower quality than the previous content. The high quality content may be a content of previous (original) quality when the content of the original quality may be content of a specified quality when a streaming service request for the content is made from a user. 130, the field value is greater than a threshold If such over the first for transmission of high capacity multimedia data, or the streaming service request more multimedia data currently being transmitted (the original), the multimedia data of the set capacity communication network 120 transmits a streaming service performing unit 110. The

In operation 818, the streaming service performing apparatus 110 receives multimedia data corresponding to the high quality or original quality content transmitted from the streaming service providing server 130 through the communication network 120. In operation 819, the streaming service performing apparatus 110 reproduces the received multimedia data in real time.

Embodiments of the invention also include computer-readable media containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

According to the present invention, in the streaming service providing system, it is possible to prevent the reproduction of the multimedia data due to the exhaustion of the received data generated during the streaming service.

In addition, according to the present invention, it is possible to provide a continuous streaming service by preventing the buffering phenomenon generated when performing the streaming service in the streaming service system.

In addition, according to the present invention, the streaming service performing apparatus can provide the streaming service providing server with information on the transmission and reception of the multimedia data to determine the packet transmission state of the multimedia data to properly provide the streaming service.

In addition, according to the present invention, the streaming service providing system can determine the situation of the network to transmit the multimedia data of the quality according to the situation can provide a streaming service continuously in the streaming service performing apparatus.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

Claims (13)

In the streaming service providing server and the streaming service performing device for providing a streaming service for multimedia data of various capacities, Transmitting a streaming service request for a predetermined content to the streaming service providing server, wherein the streaming service request includes information on a type of content to be streamed, a quality of the content, or capacity of multimedia data corresponding to the content. -; Receiving predetermined multimedia data from the streaming service providing server; Transmitting a transmission status notification message for the received multimedia data to the streaming service providing server, wherein the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; And Playing the received multimedia data in real time Including, The streaming service providing server Checking a transmission / reception time information field value from the received transmission status notification message; Comparing the checked field value with a predetermined threshold; Determining a quality of multimedia data to be transmitted according to the comparison result; And transmitting the multimedia data corresponding to the determined quality to the streaming service performing apparatus. A streaming service method in a streaming service providing server that provides a streaming service for multimedia data of various capacities to a predetermined streaming service performing device, Receiving a streaming service request for predetermined content from the streaming service performing device; Transmitting predetermined multimedia data in response to the received streaming service request; Receiving a transmission status notification message for the transmitted multimedia data from the streaming service performing device, wherein the transmission status notification message includes a transmission / reception time information field measuring a change in transmission / reception time of the multimedia data packet; Analyzing the transmission / reception time information field value; Comparing the analyzed field value with a predetermined threshold; Determining a quality of multimedia data to be transmitted according to the comparison result; And Transmitting multimedia data corresponding to the determined quality to the streaming service performing apparatus; Including, The streaming service performing apparatus is Receiving the transmitted multimedia data from the streaming service providing server; And And reproducing the received multimedia data in real time. The method according to claim 1 or 2, The determining of the quality of the multimedia data to be transmitted according to the comparison result is And when the field value is smaller than the threshold, changing the quality of the data to a lower quality than the existing quality. The method according to claim 1 or 2, The step of transmitting the multimedia data corresponding to the determined quality to the multimedia data playback terminal And when the field value is smaller than the threshold, transmit multimedia data having a capacity lower than that of the multimedia data currently being transmitted. The method according to claim 1 or 2, The determining of the quality of the multimedia data to be transmitted according to the comparison result is And when the field value is greater than or equal to the threshold, determining the quality of the multimedia data as the initially set quality. The method according to claim 1 or 2, The step of transmitting the multimedia data corresponding to the determined quality to the multimedia data playback terminal And transmitting the multimedia data having the same capacity as the initially transmitted multimedia data when the field value is greater than or equal to the threshold value. The method according to claim 1 or 2, The transmission status notification message is a real-time transport control protocol (RTCP) sender report message (Render Report Message) is a streaming service method, characterized in that used to inform the statistical information about the transmission of data. The method according to claim 1 or 2, The transmission time information field is a streaming service method, characterized in that interval jitter (interval jitter) for measuring a change in the transmission and reception time of the RTP data packet. A computer-readable recording medium for recording a program for executing the method of claim 1 or 2 on a computer. A streaming service apparatus in a multimedia data reproducing terminal that performs a streaming service provided from a streaming service providing server, Message generating unit for generating the streaming service providing request message or the transmission status notification message-The streaming service providing request message includes the type of multimedia data, the quality information of the multimedia data, the transmission status notification message is the multimedia data A transmit / receive time information field measuring a change in a transmit / receive time of a packet; A transmission / reception unit for transmitting the streaming service providing request message or the transmission status notification message to the streaming service providing server and receiving multimedia data transmitted from the streaming service providing server; And A reproducing unit for reproducing the received multimedia data in real time Including, The streaming service providing server The streaming service apparatus is characterized in that the quality of the multimedia data to be transmitted is determined according to a result of comparing the field value with a predetermined threshold by checking the transmission / reception time information field value and transmitting the multimedia data corresponding to the determined quality. . The method of claim 10, The streaming service providing server And transmitting the multimedia data having a lower quality than the transmitted multimedia data when the field value is smaller than the threshold. The method of claim 10, The streaming service providing server And transmitting the multimedia data having the same quality as the transmitted multimedia data when the field value is greater than or equal to the threshold value. In the system for providing a streaming service to a streaming service performing device, A storage unit for storing multimedia data corresponding to contents having two or more quality (capacity); Transmitting and receiving unit for transmitting to the streaming service performing apparatus requesting a streaming service for the multimedia data of a predetermined quality, and receiving a transmission status notification message informing the transmission status of the multimedia data from the streaming service performing apparatus-the transmission status The notification message includes a transmission / reception time information field measuring a change in transmission / reception time of a packet for the multimedia data; And The quality of the multimedia data is selected according to a result of comparing the field value with a predetermined threshold by checking the transmission / reception time information field value from the transmission status notification message, and transmitting the multimedia data of the selected quality to the streaming service performing apparatus. Control to control transmission Including, The streaming service performing apparatus is Streaming service providing system, characterized in that for playing the received multimedia data in real time.

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