CN105577697A - Method and communication device for transmitting marquee information to multimedia data stream - Google Patents

Abstract

The invention relates to a method for transmitting ticker information with multimedia data streams and a communication device. Transmitting parameters for transmitting at least one piece of ticker information (ti) are transmitted together in the signaling period of the transmitting parameters of at least one multimedia data stream (mmd) of a session (s); an additional logic transmission channel for transmitting the ticker information (ti) is built through parameters; a real time transmission (RTP) and effective load types (555, 666, 777, 888) are described in detail; and the source information for indicating the sources of the ticker information (ti) is inserted. In order to describe and manage the transmission parameters, a session description protocol (SDP) embedded in a session initiation protocol (SIP) is advantageously set. The method and the communication device of the invention are advantaged by that the signaling for adding the information or the ticker information (ti) can be realized in the existing network protocol of a grouping faced network with least additional signaling and transmission cost.

Description

Method and communication device for transmitting marquee information to multimedia data stream

This application is the result of a patent application with an application date of September 25, 2008, an application number of 200880131282.1, an international application number of PCT/EP2008/008141, and an invention title of "Method and communication device for transmitting marquee information to multimedia data streams". Divisional application.

Ticker-information is sometimes inserted in television programs (especially news programs). Additional information is displayed to the viewer of the currently running television program by means of ticker information. The ticker information can be, for example, information about current events, stock exchange quotes, subtitles or translations of television programs. Most often, the marquee information is inserted into the current television image as a strip of moving light subtitles (Laufschrift).

In a videotelephony system (e.g. a videoconferencing system), multimedia data streams are transmitted between terminal devices or between videoconferencing devices in a communication relationship via a packet-oriented network, preferably using a method suitable for establishing a communication relationship with multimedia data streams or session's network protocol. Network protocols for packet-oriented networks are mainly based on the IP protocol.

US 2006/0230154 A discloses a method and a unit for carrying out push sessions in a communication system using protocols such as PLNM, GSM, GPRS, UMTS or IP or other protocols. Here, push messages such as exchange quotes are forwarded from the push initiator to the gateway device, which initiates a push session with the user agent via SIP (Session Initiation Protocol) and manages ) to the user agent for the transmission of pushed content. In a SIP session, the textual part characterizing the MRSP session (e.g. the URL information of the MRSP source) is transmitted on the signaling level by means of the integrated SDP (Session Description Protocol) fragment, while on the user level it takes place with the pushed content itself MRSP session.

WO 2006/124790A2 describes how a video conference session can be started via SIP and how a third party can be bound via 3pcc (Third Party Call Control) by means of the own SIP procedure.

WO2005/041521A1 relates to managing and displaying stock ticker information and news supplementary report information on a computer screen, wherein the IP addresses of the stock server and the news server are provided by a video server.

Contents of the invention

The invention is based on the task of transmitting ticker information provided from different sources in a videotelephony system, in particular parallel to the video data stream, with little additional signaling and transmission effort. This object is solved by claims 1 and 10 .

The main aspect of the method according to the invention can be seen here: During the signaling of the transmission parameters of the multimedia data stream of the session, the transmission parameters for the transmission of the marquee information are transmitted together, wherein the additional parameters for the transmission of the marquee information are established by means of the parameters. A logical transport channel, specifying the transport protocol and payload type, and inserting source information for sources displaying marquee information. A standardized SIP protocol is preferably provided for initializing the session, into which a standardized session description protocol is inserted for describing and managing the transmission parameters negotiated via the SIP protocol not only for multimedia data streams but also for ticker messages. Usually the ticker information is inserted as text or also as a scrolling band of multimedia information into a display device such as a screen. However, within the meaning of the invention, ticker information includes all possible representations of text on video images. For example, text or multimedia information can also be represented from the bottom up or placed as an "overlay" on the displayed representation.

The main advantage of the invention can be seen therein: additional information, marquee information, can be transmitted to the multimedia data stream of the telephone system, wherein it can be obtained from different sources, for example by terminal devices (e.g. conference devices) participating in the communication relationship or by Additional information can be provided from any source of information on a network such as the Internet. A further advantage is that the signaling for the additional information can be implemented with minimal additional signaling and transmission effort into existing network protocols of the packet-oriented network.

According to a further development of the invention, the source information or information source is specified by a uniform resource identifier (URI), which specifies the domain (Domain) from which the ticker information is supplied. It is thus possible to specify a wide variety of information sources from which additional information, in particular ticker information, can be provided or supplied.

According to an advantageous transmission protocol, the port via which the marquee information is transmitted is additionally specified, and the payload type xml, html, text or video is set as the payload type of the marquee information. In addition, formatting information and/or output information for matching the ticker information to the output device can advantageously be additionally inserted for reproducing the ticker information on an output device assigned to a terminal of the network. Adaptation to different output devices such as screens or LCD displays is thus possible.

Further advantageous developments of the invention and an advantageous communication device for carrying out the method according to the invention emerge from the other claims.

Description of drawings

The invention and its developments are explained in more detail below with the aid of the drawings.

It is assumed for this embodiment that in the network LAN two terminal devices E(1), E(2) establish a session S for a video telephony communication relationship in order to bidirectionally transmit each at least one multimedia data stream mmd( Alternatively, a session for one-way transmission can also be established). Such a communication relationship can be, for example, a videoconference between two parties or their terminals E( 1 ), E( 2 ) or a conference device. As a network protocol for establishing a session (hereinafter referred to as session S) of a videotelephony session, for example, the standardized SIP protocol SIP (Session Initiation Protocol) (currently according to RFC standard 3261) is provided. Another network protocol for transmitting multimedia data mmd is alternatively possible.

In order to describe or manage the characteristics or transmission parameters of the multimedia data stream mmd of the session S, for example, a standardized Session Description Protocol (SessionDescriptionProtocol) SDP (currently according to RFC standard 4566) is set. By means of the session description protocol SDP, the transmission parameters of the multimedia data flow mmd negotiated by means of the SIP protocol SIP are described and managed for the duration of the session S.

The following shows by way of example a protocol excerpt from the Session Description Protocol SDP into which the transmission parameters of the ticker information ti to be transmitted according to the invention are inserted:

Supplement according to the present invention:

Explanation of the protocol excerpt SDP:

1) Explain the protocol version

2) describe the origin of the session and define the session;

2890844526=session number;

3) s = the name of the session, no name in this example

4) c=connection data: IN indicates the network type Internet, IP4=Internet Protocol Type 4, 192.0.2.1.101=IP address;

5) m = data stream of type audio; 49172 = port number; RTP/AVP = real-time protocol is a transmission protocol for audio and video conferencing, 0 = payload type 0;

6) a = attribute of the audio data stream;

rtpmap: 0PCMU/8000 is the encoding parameter of payload type 0 and audio data stream;

7) m = two streams of type video with payload types 111 and 112;

4200 is the port number;

RTP/AVP = Real Time Protocol is a transport protocol for audio and video conferencing, 111, 113 = payload type 111, 113;

8) rtpmap: 111 is payload type 111;

H264/90000 is the first video data stream of standardized form H.264;

9) rtpmap:112 is payload type 112;

H264/90000 is the second video data stream of standardized form H.264;

10) fmtp:111 format-specific parameters for payload type 111

Profile-level-id=428010 indicates the profile (Profil) that supports the codec used to decode the compressed video data stream, and indicates the highest level of the signaling profile;

Packetization-mode-1 describes the packetization mode of the video data stream formatted according to H.264;

11) As in 10), but for payload type 112;

12) m=ticker4299udp555666777888,

m = marquee data stream (indicating that the following properties refer to data streams of type marquee; data streams of type marquee are additional types to data streams of type audio and type video described above);

4299 is the port number;

udp555666777888=The standardized transport protocol is User Data Protocol UDP with different payload types 555666777888,

13) a=rtpmap: 555ticker_xml is a dynamic payload type 555, which is an XML-formatted marquee data stream;

14) a=rtpmap: 666ticker_xml is a dynamic payload type 666, which is an HTML-formatted marquee data stream;

15) a=rtpmap: 777 ticker_plaintext is a dynamic payload type 777, which is a marquee data stream formatted according to ASCII code; (other marquee data stream formats are also possible (not shown in this embodiment);

16) a=rtpmap:888ticker_video is a dynamic payload type 88, which is a sorted marquee data stream in video format.

17) fmtp666URL=news.enterprise.com/ticker

For payload type 666 the following payload-specific parameters are specified: Universal Resource Locator URL (UniversalRessourceLocator) specifies the source or information source of the marquee data stream or marquee information ti, supplied or provided by the source or information source in HTLM format Marquee information ti. URL An address or identifier especially in networks with the IP protocol. Under this URL, the ticker information ti can also be extracted by the terminal E and, for example, correspondingly inserted or inserted into a video image in the area of the terminal or on a display unit in the terminal (for example, a screen of a conference device) middle.

The payload types 555, 666, 777, 888 are exemplarily described, that is, in a specific case, only one of the payload types in the Session Description Protocol SDP is described together with the source information of the source of the display ticker information ti.

For this exemplary embodiment it is assumed that the ticker information ti or the ticker data stream is provided by the ticker device TE in the Internet and transmitted as ticker data stream to the terminal E of the network LAN or to the conference device. Furthermore, it is assumed for the exemplary embodiment that a session S (not shown) is started by the first terminal E( 1 ) via the enterprise system ES (for example a server structure in the local network LAN).

For this purpose, an INVITE message (INVITE) is formed in the first terminal E( 1 ) according to the SIP protocol SIP and transmitted to the enterprise system ES. In a SIP message invitation formed according to the RFC standard 3261, information about the message type, destination address, SIP version, SIP address, port number and the transport protocol for replying to the message is basically specified.

In the Session Description Protocol SDP embedded in the SIP protocol SIP, the transmission parameters of the multimedia data stream mmd (video and audio data streams) of a session S with video and audio data transmission are described (in this figure invited by the name (SDP) (INVITE(SDP)) to indicate). According to the invention, transmission parameters for transmitting the ticker information ti are additionally inserted into the session description protocol SDP, wherein the ticker device TE is addressed in the Internet by means of a universal resource identifier URI.

The enterprise system ES invites an INVITE message including the embedded Session Description Protocol SDP to be forwarded via the local network LAN to the second terminal E ( 2 ) (indicated in the figure by the arrow indicated by INVITE (SDP)). In the second terminal equipment E(2), the 180 ringing message 180 ringing (180Ringing) is formed according to the SIP protocol SIP, and is transmitted to the first terminal equipment E(1) via the enterprise system ES (in this figure, by using 180 ringing indicated by an arrow indicated by a bell). Via this 180 ringing message 180 ringing display to the enterprise system ES or the first terminal E(1), the second terminal E(2) can be determined in the local network LAN or at the second terminal E(2) conferencing equipment (not shown).

The 200 OK message 200 OK is then formed in the second terminal E(2) according to the SIP protocol SIP and transmitted via the enterprise system ES to the first terminal E(1) (indicated in this figure by the arrow indicated by OK200) . This 200 OK message 200 OK indicates to the enterprise system ES and the first terminal E(1) that the second terminal E(2) has accepted the initialization of the signaling session S. The ACK message ACK is then formed in the first terminal E(1) according to the SIP protocol SIP and transmitted to the second terminal E(2) via the enterprise system ES and the local network LAN. The transmission of the 200 OK message OK200 is thus confirmed to the second terminal E(2).

A session S is established with the now negotiated address and transmission protocol and transmission parameters, and the bidirectional transmission of the multimedia data stream mmd can start.

According to this exemplary embodiment, the ticker information ti is provided by the ticker device TE and transmitted via the local network LAN to the second terminal E(2) according to the transmission protocol specified in the SDP protocol SDP and the negotiated transmission parameters. Since the ticker device TE is exemplarily arranged in the Internet, it is assumed for this exemplary embodiment that the Internet can be accessed from the local network LAN (not shown). Alternatively, the marquee device TE can also be arranged in the local network LAN.

The ticker information ti advantageously establishes a logical connection to the ticker device TE in the Internet by means of the universal resource locator URL available in the second terminal E(2) and there it extracts the provided ticker Information ti.

Alternatively, the marquee information ti may also be provided by one of the two terminal equipments E(1), E(2), and distributed to the terminal equipment E included in the communication relationship, or extracted by the terminal equipment E , where as the source, the terminal equipment E that provides ticker information ti is described in the Session Description Protocol SDP.

In a second terminal E( 2 ), eg a conference device, the multimedia data stream mmd is reproduced as a video image at a display device or screen. The marquee information ti is usually inserted into the ongoing video image in strips as moving light subtitles. The technology already used for inserting ticker information ti into the television screen can be provided for insertion. Alternatively, any desired insertion of the ticker information ti is possible, for example in a predetermined area of the non-strip design of the screen or in the entire screen.

The method according to the invention is not limited to this exemplary embodiment, but can also be used to transmit additional information in the sense of ticker information back from a terminal device to a terminal device participating in a communication relationship (e.g. televoting in a video conference) ). The ticker information can also be sent to other IP addresses or terminals and devices such as telephones or PCs, the other devices acting as ticker devices. In addition, output information, such as formatting information, rendering information (render information), filter information and speed adaptation information, which lead to adaptation to the display device of the terminal when reproducing the ticker information, can be inserted as transmission parameters into the session description protocol.

Claims (9)

1. for utilizing at least one by the multimedia data stream (mmd) of procotol (SIP) signalling terminal equipment (E (1) to multimedia system via the network (LAN) towards grouping, E (2)) transmit the method for at least one ticker information (ti)

-wherein for transmitting the transformation parameter of ticker information (ti) and being transferred at least one terminal equipment for the transformation parameter of at least one multimedia data stream (mmd) of session (S),

-wherein by describing at least one host-host protocol (RTP) and at least one PT Payload Type (555 in detail for the transformation parameter transmitting ticker information (ti), 666,777,888) and insert and show at least one source information in the source of ticker information (ti)

During the signalling of the transformation parameter of at least one multimedia data stream (mmd) of session (S), wherein transmit the transformation parameter for transmitting ticker information (ti) together,

It is characterized in that,

In order to distribute to the terminal equipment (E (1) of network (LAN), E (2)) output equipment in reproduce ticker information (ti), the output information additionally inserted formatted message and/or ticker information (ti) and output equipment are matched.

2. according to the method for claim 1, it is characterized in that, as source information, insert the Uniform Resource Identifier (URI) of the address that data source is described, in this data source, ticker information (ti) is provided.

3., according to the method for one of claim 1 or 2, it is characterized in that, utilize host-host protocol illustrate respectively transmission corresponding ticker information (ti) via port (49172,4200).

4. according to the method for one of aforementioned claim, it is characterized in that, as the PT Payload Type of corresponding ticker information (ti), xml(555 be set), html(666), text (777) or video (888) PT Payload Type.

5. according to the method for one of aforementioned claim, it is characterized in that, by according to indicated host-host protocol (RTP, UDP) ticker information (ti) transmitted is reproduced together with transmitted at least one multimedia data stream (mmd) as ticker information (ti) in the output equipment distributing to the terminal equipment of network (LAN) (E (1), E (2)).

6. according to the method for claim 5, it is characterized in that, using ticker information (ti) zonally as scrolling information or be inserted in region given in advance in the screen of at least one multimedia data stream of reproduction (mmd) of output equipment.

7., according to the method for one of aforementioned claim, it is characterized in that, according to normalized SIP protocol (SIP) or be applicable to transmitting multimedia data stream (mmd) protocol realization described in procotol.

8. according to the method for claim 4, it is characterized in that, for to describe and management ticker information (ti) arranges standardization Session Description Protocol SDP, and standardized user data protocol UDP or transmission control protocol TCP or Transport Layer Security TLS or Datagram Transport Layer security protocol DTLS or standardization real-time protocol (RTP) RTP are set for the described ticker information of transmission (ti).

9. communicator, have with terminal equipment (E (1), E (2)) towards grouping network (LAN) and have for the terminal equipment (E (1) in multimedia system, E (2)) between the procotol (SIP) of at least one multimedia data stream of signalling (mmd), be designed to perform at least one in aforementioned claim 1 to 8.