KR20050014554A - Multimedia streaming service method for mobile communication terminal - Google Patents

Abstract

PURPOSE: A multimedia streaming service method of a mobile communication terminal is provided to enable a user to continuously maintain or disconnect a video/audio session according to a desired video/audio reproduction option, to prevent an unnecessary communication channel from being occupied, thereby reducing traffic while saving communication resources. CONSTITUTION: A user sets an environment with a desired video/audio session connection. If the user wants to see multimedia contents in real time, video/audio sessions are connected. The multimedia contents are downloaded to output a video/audio signal in real time. A system decides whether a folder is closed. If so, the system disconnects the video session in reference to a stored option, and determines whether to continue the audio session. The system decides whether an audio volume is reduced to the maximum. If so, the system disconnects the audio session while determining whether to continue the video session.

Description

MULTIMEDIA STREAMING SERVICE METHOD FOR MOBILE COMMUNICATION TERMINAL}

The present invention relates to a multimedia streaming service method of a mobile communication terminal, and more particularly, to a multimedia streaming service method of a mobile communication terminal that allows a user to select and use a video and audio streaming service.

Conventional multimedia streaming service provides real-time or non-real time streaming transmission of video and audio data through the interworking of MMSC and VOD server.

1 is a diagram illustrating a conventional multimedia message service and protocol stack. The configuration of a mobile communication network providing a multimedia streaming service will be described and the process of real time transmission will be described.

In order to enable multimedia streaming transmission between the IP network and MMSC, an interface using an RTP / RTCP protocol based on the UDP protocol or a real time multimedia streaming control protocol such as an RTSP protocol is provided.

In order to perform multimedia streaming transmission through the interface between the IP network and the MMSC, transmission / reception address information, address conversion, and authentication are performed using the SIP protocol, and a call within the IP network connected to the MMSC is established. Through this, multimedia streaming messages can be transmitted, and VOD-type multimedia such as video advertisements and movies of ISPs can be stored directly on the VOD server.

In this state, when the multimedia message is received from the IP network or the e-mail server, the multimedia message processing unit of the MMSC extracts user information from the SIP header or e-mail header included in the received multimedia message, performs authentication, and then executes the authentication of the corresponding receiver. The user and mobile terminal information is extracted from the profile to perform real-time or non-real-time media format conversion through buffering.

The MMSC stores the converted media in a VOD server in real time. In this case, the converted media is stored in a multimedia database or file in the VOD server.

The VOD server provides message transmission and reception through the video / audio codec above the RTP / RTCP protocol, UDP and IP protocol layers above, enabling dynamic transmission and playback for multimedia streaming services to mobile terminals. The / RTCP protocol or RTSP protocol improves the quality of real-time multimedia streaming services through the use of jitter, transmission loss, and operational resources.

Network interworking required for the actual transmission of multimedia messages requires network interworking via GGSN or RTP interface and UDP / IP protocol, and network interworking with CSCF for real-time call control through SIP protocol.

On the other hand, as a real-time call control through the SIP protocol, it is possible to receive a streaming service for immediately receiving and playing multimedia messages in a mobile communication terminal through call signal conversion and transmission without media conversion and message arrival notification.

For example, when a phone number or address of a specific mobile communication terminal is input from a PC connected through the Internet, call setup is performed using the SIP protocol, and when the call is set up, transmission flow control of the RTP / RTCP protocol is performed. The multimedia streaming message is sent to the MMSC.

Accordingly, the MMSC performs a media conversion operation in real time through buffering of the received multimedia streaming message and stores it in the VOD server.

Thereafter, when media conversion and storage are completed, an arrival notification message is transmitted to the receiver's mobile terminal or an incoming call signal is received, and when the SIP call setup is completed, the converted multimedia streaming message is received through the flow control of the RTP / RTSP protocol. To transmit to the mobile communication terminal.

The VOD service provided by the mobile terminal basically serves both video and audio such as internet television and online movies. In order to provide such a real-time service, UDP-based RTP / RTCP session connection, which is a real-time transmission protocol, is basically required.

When the streaming service is started, video / audio data is transmitted to the RTP session, each RTCP that controls the flow of the data is interlocked, and the RTSP operates for overall connection management.

However, in the prior art as described above, if the user wants to listen to only the audio without watching the video or only the video without the audio, the user cannot selectively receive the service. Therefore, even if the sound volume of the audio signal is reduced, the data is transmitted, so that the user has to pay an unwanted packet fee.

Accordingly, the present invention has been made in view of the above problems, and the multimedia streaming service method of the mobile communication terminal to change the session connection according to the configuration of the video / audio data service to receive the video / audio service The purpose is to provide.

1 is a diagram illustrating a conventional multimedia message service and protocol stack.

2 is a flowchart illustrating a multimedia streaming service method of a mobile communication terminal of the present invention.

The present invention for achieving the above object comprises the steps of setting the environment to the video / audio session connection desired by the user; Connecting a video / audio session with a real time transmission protocol when the user wants to watch the multimedia content in real time; Downloading the multimedia contents and outputting video / audio to a display window and a speaker in real time; Determining whether the folder is closed and determining whether to disconnect the video session and continue the audio session with reference to the options stored in the preferences; Determining whether the audio volume is reduced to the maximum, and if the volume is reduced, referencing the option stored in the configuration, and disconnecting the audio session and determining whether to continue serving the video session.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a multimedia streaming service method of a mobile communication terminal according to an embodiment of the present invention, comprising: setting a preference for a video / audio session connection desired by a user; Connecting a video / audio session with a real time transmission protocol when the user wants to watch the multimedia content in real time; Downloading the multimedia contents and outputting video / audio to a display window and a speaker in real time; Determining whether the folder is closed and determining whether to disconnect the video session and continue the audio session with reference to the options stored in the preferences; Determining whether the audio volume is reduced to the maximum may be performed by referring to the options stored in the configuration and determining whether to disconnect the audio session and continue to service the video session.

The user sets service options in the configuration menu before using the VOD content. In the configuration menu, when playing VOD content, there is an option to determine how to handle video / audio session connections based on the user's keystrokes.

The options determine how the video / audio sessions are handled when the folder is closed and the audio volume is maximized. The processing options for the above two situations are described.

When the folder is closed, there are two processing options: disconnecting the video session and continuing to service the audio session, or disconnecting all the video / audio sessions and ending the service.

When the audio volume is reduced to the maximum, there are two processing options: to reduce the audio volume and keep the video / audio session connected, or to disconnect the audio session and continue servicing the video session.

Of the four options, the user selects the processing option he / she wants to set up the environment. For example, suppose you select the option that the video session is disconnected and the audio session continues to be serviced when the folder is closed, and the audio session is disconnected and the video session continues to be serviced if the audio volume is reduced to the maximum. .

When a user wants to watch a desired VOD content in real time using a multimedia streaming service, the mobile communication terminal connects RTP / RTCP and RTSP sessions, which are real time transmission protocols.

Then, VOD content is downloaded and video / audio is output to the display window and the speaker in real time.

Close the folder on the terminal while the user is watching the VOD content. At this time, the folder closing event occurs in the mobile communication terminal and is delivered to the event processing routine of the multimedia streaming service.

The event handling routine consults the options stored in the preferences to determine what happens when the folder is closed. If the option is set to disconnect the video session and continue to service the audio session, then disconnect the currently serviced video session and keep the audio session.

If the user reduces the audio volume to the maximum without closing the folder, the user can disconnect the audio session and continue servicing the video session according to the options stored in the preferences.

As described in detail above, the present invention has the effect of reducing traffic and saving communication resources by not occupying unnecessary communication channels since the video / audio session is continuously maintained or disconnected according to a video / audio playback option desired by the user.

Claims (2)

Configuring a user with a desired video / audio session connection; Connecting a video / audio session with a real time transmission protocol when the user wants to watch the multimedia content in real time; Downloading the multimedia contents and outputting video / audio to a display window and a speaker in real time; Determining whether the folder is closed and determining whether to disconnect the video session and continue the audio session with reference to the options stored in the preferences; Determining whether the audio volume is reduced to the maximum, and if the decrease is made, referring to the options stored in the configuration, disconnecting the audio session and determining whether to continue to service the video session. . The method of claim 1, wherein the options in the preferences are set to two processing options that disconnect the video session and continue servicing the audio session when the folder is closed, or disconnect both the video / audio session and terminate the service. A method of multimedia streaming service of a mobile communication terminal, characterized in that it consists of two processing options that reduce the audio volume and keeps the video / audio session connected, or disconnects the audio session and continues serving the video session when reduced.