KR20050068587A - Dynamic media control method based on rtsp in wireless data communication network - Google Patents

Abstract

Disclosed is a Real Time Streaming Protocol (RTSP) based media control method for transmitting transmission media data according to a user's selection. The method includes a) receiving a media data request from a client terminal; b) when receiving a request from the client terminal, transmitting the requested media data to the client terminal; And c) if the command for controlling the media data from the client terminal is received while transmitting the media data to the client terminal by step b), controlling the media data according to the command. The command may be provided through a SET_PARAMETER message, and the media data may include at least one or more of a video file, an audio file, and a text file, and the command may request a transmission stop for each of the video file, the audio file, and the text file. Or a retransmission request.

Description

RTPS based dynamic media control method in wireless data communication network {Dynamic Media Control Method based on RTSP in Wireless data Communication Network}

The present invention relates to a RTSP-based dynamic media control method in a wireless data communication network, and more particularly, to a RTSP (Real Time Streaming Protocol) based media control method for transmitting transmission media data in response to a user's selection.

Currently, wireless data communication networks provide various multimedia services to subscribers. Multimedia service means vast data transmission through wireless data communication network. In a wireless data communication network, a charge for using a multimedia service is based on a packet. Therefore, when receiving a multimedia service such as video over a wireless data communication network, a significant cost is charged to the subscriber.

When using a multimedia service, it is often the case that not all the media data received according to the surrounding environment. For example, in public places, audio is turned off and only video is watched. However, in the video service, the terminal is provided with both video and audio data constituting the video, and audio off is implemented by menu selection of a player mounted in the terminal. This is because the present invention cannot control the configuration of the content to be received by the terminal when receiving the multimedia service. Therefore, the user may receive data that is not necessary when receiving media, and thus, a user may have to pay a fee for receiving data that is not used.

Therefore, there is a need for a method in which a receiver can transmit only desired data while transmitting media data in a wireless data communication network.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless data communication network capable of controlling media data transmitted according to a selection of a receiver during media transmission in a wireless data communication network. It is to provide RTSP based dynamic media control method.

RTSP based dynamic media control method in a wireless data communication network according to the first aspect of the present invention for realizing the above object is a) RTSP client terminal via the wireless data communication network to the media data requested by the client terminal in accordance with RTSP Transmitting to; And b) when the command for controlling the media data is generated from the client terminal while the media data is transmitted to the client terminal by step a), reconstructs the media data according to the command, and reconstructs the media data. Transmitting the media data to the client terminal. Preferably, the command is provided through a SET_PARAMETER message, and includes a request to stop transmission or retransmission of the media data. More preferably, the media data includes at least one or more of a video file, an audio file and a text file, and the command includes a transfer stop request or a retransmission request for each of the video file, audio file and text file.

RTSP based dynamic media control method in a wireless data communication network according to a second aspect of the present invention comprises the steps of: a) receiving a media data request from a client terminal; b) when receiving a request from the client terminal, transmitting the requested media data to the client terminal; And c) if the command for controlling the media data from the client terminal is received while transmitting the media data to the client terminal by step b), controlling the media data according to the command. The command may be provided through a SET_PARAMETER message, and the media data may include at least one or more of a video file, an audio file, and a text file, and the command may request a transmission stop for each of the video file, the audio file, and the text file. Or a retransmission request. Preferably, the client terminal transmits the command and resends the command if there is no response to the command for a predetermined time period, and ignores the transmission of the command if the retransmission is repeated a predetermined number of times. .

According to the present invention, only the data selected by the user can be transmitted to the user during the multimedia service, thereby reducing the burden on the user's packet service due to unnecessary data transmission.

Hereinafter, the present invention will be described in more detail with reference to the following examples.

1 is a signal flow diagram illustrating a method for controlling RTSP-based dynamic media in a wireless data communication network according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a retransmission process of a SET_PARAMETER message in FIG. 1.

In this embodiment, it is assumed that a streaming session is managed according to Real Time Streaming Protocol (RTSP), and each streaming data is transmitted according to RTP.

Referring to FIG. 1, when the RTSP server 200 (hereinafter referred to as a server) to which the method according to the present invention is applied receives a media data request from a client terminal 100 (hereinafter referred to as a terminal), the requested The media data is transmitted to the terminal 100. While transmitting the media data to the terminal 100, when a command for controlling the media data from the terminal 100 is received, the media data is controlled according to the command. The command is generated in the terminal 100 through the SET_PARAMETER message of the RTSP and provided to the server 200. The media data may be composed of one or more media according to content. For example, the media data includes at least one of a video file, an audio file, and a text file. The command also includes interrupting or retransmitting each of the video file, audio file and text file.

In order to receive the content, the terminal 100 establishes a session for each media constituting the content according to the RTSP method, and requests the server 200 for each media constituting the content. 200 streams the media data of the content to the terminal 100 according to the request.

The terminal 100 provides a SET_PARAMETER message to the server 200 to control the media data of the content. Preferably, the terminal 100 is programmed to generate a SET_PARAMETER message according to a user's selection. Those skilled in the art will understand that the present invention is not limited by the program method of the terminal.

An example of the SET_PARAMTER definition according to the present invention is shown in Table 1 below.

Table 1

order Field Name  Value range Remarks One AppClass DMC Related Service Classification 2 Opcode Stop: Request to stop data transfer to the RTP connection for a particular media Start: Request to resume data transfer to the RTP connection for a particular media 3 Trackid Track ID defined in SETUP 4 URL Rtsp URL Rtsp URL

An example of an occurrence in the terminal 100 and a response of the server 200 according to the parameter definition of Table 1 is shown in Table 2 below.

TABLE 2

C → S: SET_PARAMETER rtsp: //example.com/fizzle/foo RTSP / 1.0 CSeq: 421 Content-length: 73 Content-type: text / parameters AppClass: DMC OpCode: Stop TrackID: 1 URL: "rtsp: //www.nate.com/video/trackID=1" S → C: RTSP / 1.0 200 OK CSeq: 421 Content-Length: 32 Content-Type: text / parameters AppClass: DMC OpCode: Stop TrackID: 1

The SET_PARAMTER message shown in Table 2 requires the server 200 to stop transmitting data of track 1, and the server 200 transmits media data excluding the data of track 1 according to the SET_PARAMTER message. Stream to.

Hereinafter, an RTSP-based media control method in a wireless data communication network according to the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the terminal 100 requests a description of content for which a DESCRIBE message is desired in a TCP session. Then, in response to the DESCRIBE message, the server 200 provides all the attributes of each media constituting the content to the terminal 200 (S1 to S3).

Upon receiving the DESCRIBE response from the server 200, the terminal 100 receives the attribute of the content, and the terminal 100 selects desired media such as video of track 1, audio of track 2, and the like according to a user's selection. Each SETUP request message is sent to the server 200 to request the text of track 3. Then, in response to each of the SETUP request messages, the server 200 provides the transport mechanisms (Transport Mechanisms) to be used in the distribution of the requested media to the terminal 100 (S4 to S8).

When receiving the SETUP message response of the server 200, the terminal 100 transmits a PLAY message requesting to transmit the media through the mechanism specified in the SETUP to the server 200. Then, the server 200 provides the requested media stream to the terminal 100 in response to the PLAY message (S10 to S12).

During the transmission of the requested media stream, a SET_PARAMETER message for controlling the media stream may be generated from the terminal 100 according to the present invention. For example, the user may need to stop playing a specific media depending on the surrounding environment during media playback of the terminal 100. At this time, for example, a media defined at initial setting may be provided by placing a pop-up menu at the bottom of a playback screen of the terminal 100 so that a user can specify a change / stop of media playback. It is preferable that a player is mounted so as to recognize the type of and select the stop / restart thereof by connecting with the track ID. In addition, the control menu may be disabled when it corresponds to the control according to the terminal and the playback state. For example, if the content does not have a specific media, it is desirable to be left out or disabling from the menu item. For example, if a particular terminal has video, audio, and text, the initial menu can all select a transition from on to off, so the "Video off", "Audio off" and "Text Off" items indicate It is preferable. In the state where video playback is off, it is preferable to indicate in the same manner as "Video On", "Audio off", and "Text Off". However, it should be noted that the present invention is not limited by the player mounted on the terminal 100.

In step S 13, as shown in Table 2, when the terminal 100 generates a SET_PARAMETER message instructing to stop transmission of track 1 video, the server 200 responds to the SET_PARAMETER message. According to the command, the stream of remaining media except for video track 1 in the content is provided to the terminal 100 (S13 and S14).

Subsequently, when the user selects a menu of the terminal 100 as video playback due to a change in the playback environment, a SET_PARAMETER message for a command for requesting retransmission is generated from the terminal 100. Then, the server 200 transmits a stream including video data to the terminal 100 according to the command (S14 and S15).

Meanwhile, when the response from the server 200 to the SET_PARAMETER message transmitted from the terminal 100 is not received for a predetermined time, for example, 3 seconds, the terminal 100 is predetermined as shown in FIG. 2. The number of times, for example, is sent up to three times, and finally ignored if there is no response (S21 to S 25). If another SET_PARAMETER is transmitted from the terminal 100 to the server 200 in a situation in which a response to the previous SET_PARAMETER message does not come, the timer and count are reset (S26 and S27).

Therefore, according to the above configuration, the user can arbitrarily block all or specific media according to the characteristics of the contents while the terminal is in use, or if the user is not satisfied with the quality, the contents with a large amount of data. In addition, by not receiving unnecessary data from the user's point of view, it is possible to save packet charges, which, in reverse, can result in saving of wireless network resources and system resources and maximizing efficiency.

As described above, according to the present invention, it is possible to realize an RTSP-based dynamic media control method in a wireless data communication network capable of controlling media data transmitted according to a selection of a receiver during media transmission in a wireless data communication network. do.

Although the present invention has been described in detail by the above embodiments, the present invention is not limited thereto, and variations and improvements can be made without departing from the ordinary knowledge of those skilled in the art.

1 is a signal flowchart illustrating a method for controlling RTSP-based media in a wireless data communication network according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a retransmission process of a SET_PARAMETER message in FIG. 1.

<Explanation of symbols for main parts of drawing>

100: terminal 200: RTSP server

Claims (8)

In a method for distributing media according to the RTSP protocol in a wireless data communication network, a) transmitting the media data requested by the client terminal to the RTSP client terminal through the wireless data communication network according to the RTSP protocol; And b) if a command for controlling the media data is generated from the client terminal while the media data is transmitted to the client terminal by step a), reconstruct the media data according to the command, and And transmitting media data to the client terminal. The method of claim 1, wherein the command is provided through a SET_PARAMETER message. The method according to claim 1 or 2, wherein the command comprises a request to stop transmission or retransmission of the media data. The method according to claim 1 or 2, wherein the command is defined by at least one parameter of SET_PARAMETER. The method of claim 1, wherein the media data includes at least one or more of a video file, an audio file, and a text file, and the command includes a transmission stop request or a retransmission request for each of the video file, audio file, and text file. An RTSP-based Dynamic Media Control Method in Wireless Data Communication Networks. In a method for distributing media according to RTSP in a wireless data communication network, a) receiving a media data request from a client terminal; b) when receiving a request from the client terminal, transmitting the requested media data to the client terminal; And c) controlling the media data according to the command if a command for controlling the media data from the client terminal is received while transmitting the media data to the client terminal by step b); , The command is provided through a SET_PARAMETER message, wherein the media data includes at least one or more of a video file, an audio file, and a text file, and the command includes a transmission stop request or a retransmission request for each of the video, audio, and text. An RTSP-based dynamic media control method in a wireless data communication network. 7. The method of claim 6, wherein the client terminal transmits the command and resends the command if there is no response to the command for a predetermined time, and ignores the transmission of the command if the retransmission is repeated a predetermined number of times. RTSP based dynamic media control method in a wireless data communication network, characterized in that the operation. 8. The method of claim 6 or 7, wherein the command is defined by at least one or more parameters of SET_PARAMETER.