WO2012155739A1 - 基于远程呈现系统的信令交互方法及装置 - Google Patents

基于远程呈现系统的信令交互方法及装置 Download PDF

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Publication number
WO2012155739A1
WO2012155739A1 PCT/CN2012/074139 CN2012074139W WO2012155739A1 WO 2012155739 A1 WO2012155739 A1 WO 2012155739A1 CN 2012074139 W CN2012074139 W CN 2012074139W WO 2012155739 A1 WO2012155739 A1 WO 2012155739A1
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WIPO (PCT)
Prior art keywords
remote
capability
location information
media
capability set
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PCT/CN2012/074139
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English (en)
French (fr)
Inventor
孙博
李军
叶小阳
刘峥
Original Assignee
中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012155739A1 publication Critical patent/WO2012155739A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/14Systems for two-way working
    • H04N7/15Conference systems
    • H04N7/152Multipoint control units therefor

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for signaling interaction based on a remote presentation system.
  • a telepresence system refers to a conference television system that has been carefully designed to give attendees an immersive presence. Compared to traditional video conferencing systems, the ability to provide life-size images, eye-catching effects, smoother motion, and precise limb behavior of remote participants greatly improves the video communication experience.
  • the traditional conference television telepresence terminal generally includes one channel audio, one main video, and one auxiliary video, and the telepresence system remote presentation terminal is different from the telepresence terminal used in the traditional conference television, and generally has a single screen, a dual screen, and a three screen.
  • Multi-screen the screen here refers to the large display used to present the remote telepresence terminal.
  • Several screens contain several displays. There are several channels of audio and several main videos, and the media needs to be used. Bind to location information.
  • the telepresence system there is a multipoint conference networking architecture and a peer-to-peer conference networking architecture.
  • the telepresence system shown in FIG. 1 includes: a multipoint control unit (MCU for short), a three-screen telepresence terminal 1, a three-screen telepresence terminal 2, a three-screen telepresence terminal 3, and a single screen.
  • Telepresence terminal 4 The telepresence system shown in FIG.
  • CISCO proposes a Telepresence Interoperability Protocol (TIP) for a Session Initiation Protocol (SIP) based remote presentation system.
  • TIP Telepresence Interoperability Protocol
  • SIP Session Initiation Protocol
  • the ⁇ 323 protocol is used for multi-channel audio/video signaling interaction between the MCU and the telepresence terminal of the telepresence system (see FIG. 1 for details), and between the telepresence terminal and the telepresence terminal (see FIG. 2 for details). How to carry out multi-channel media transmission, how to bind media and location information has not yet proposed a clear technical solution.
  • each screen in the remote presentation terminal performs signaling interaction with the remote end as a single terminal, that is, a multi-signaling multimedia channel interaction mode, so that the control of the remote presentation terminal is very complicated.
  • the present invention provides a method and apparatus for signaling interaction based on a remote presentation system, so as to at least solve the related art, in which all screens in the remote presentation terminal are used as a single terminal to perform signaling interaction with the remote end, resulting in a remote presentation terminal. The control is very complicated.
  • a signaling interaction method based on a remote presentation system is provided.
  • the telepresence system-based signaling interaction method includes: the MCU or the telepresence terminal receives the capability set message of the remote configuration, where the capability set message carries the association relationship between the media and the location information supported by the remote end; Or the remote presentation terminal interacts with the remote end according to the location information of the supported media and the received association relationship; the logical channel corresponding to the location information of the common capability obtained by the MCU or the remote presentation terminal and the remote end respectively opening the interaction .
  • the method further includes: configuring, by the remote end, the capability set message according to the number of paths and location information of all media supported by the remote terminal; The remote end sends the capability set message constructed by it.
  • the constructing, by the remote end, the capability set message according to the path number and the location information of all the media supported by the remote end includes: adding, by the remote end, an optional capability set, when the synchronization capability set is configured, where the added optional capability set is added
  • the number is determined according to the number of channels supported by the remote end, and the added optional capability set is in one-to-one correspondence with the media supported by the remote end; the remote end increases the location in the optional capability set Information, and establishing the association relationship between all media supported by the remote end and the location information.
  • the remotely constructing the capability set message includes: when the remote end constructs the synchronization capability set in the capability set message, placing the optional capability information of the default location capability at the forefront of the synchronization capability set.
  • the logical channel message determines an output location of the medium; the MCU or the remote presentation terminal and the remote end respectively open the logical channel and exchange an acknowledgement message.
  • the number of logical channels described above is the same as the number of media included in the public capability obtained by the interaction.
  • the output location information is carried in the open logical channel message by at least one of the following: expanding a session identifier sessionID field, where the value of the extended session ID field includes the location information;
  • the attribute field of the output location information includes at least one of the following: audio, main video, and secondary video.
  • the telepresence system-based signaling interaction device is provided on the MCU or the remote presentation terminal, and includes: a receiving module, configured to receive a capability set message of the remote configuration, where the capability set message carries the remote support The relationship between all the media and the location information; the capability interaction module is configured to perform the capability interaction with the remote end according to the location information of the media supported by the MCU or the remote presentation terminal and the received association relationship; the channel opening module is set to open the interaction The logical channel corresponding to the location information of the public capability.
  • the channel opening module includes: a sending unit, configured to open a logical channel message to the remote end, where each of the open logical channel messages carries input location information of the media transmitted by the logical channel at the transmitting end; and the determining unit is set according to The received open logical channel message determines an output location of the media; the processing unit is configured to open the logical channel and reply to the acknowledgement message.
  • a signaling interaction device based on a telepresence system is provided.
  • the telepresence system-based signaling interaction apparatus is provided to the MCU or the remote presentation terminal, and includes: a construction module configured to construct a capability set message according to the number of channels and location information of the supported media; and a sending module, configured to Send a capability set message constructed by the constructor.
  • the constructing module is configured to place the optional capability information of the default location capability at the forefront of the synchronization capability set when constructing the synchronization capability set in the capability set message.
  • the MCU or the remote presentation terminal uses a single signaling multimedia channel to perform signaling interaction with the remote end, and simultaneously binds the media information and the location information, and solves the related technologies in the remote presentation terminal as each one
  • the signaling interaction between the separate terminal and the remote end causes the control of the remote presentation terminal to be very complicated, thereby simplifying the remote presentation terminal control and realizing the integration of the remote presentation system and the traditional conference television.
  • FIG. 1 is a network architecture diagram of a telepresence system multipoint conference
  • FIG. 2 is a network architecture diagram of a telepresence system peer-to-peer conference
  • FIG. 1 is a network architecture diagram of a telepresence system multipoint conference
  • FIG. 2 is a network architecture diagram of a telepresence system peer-to-peer conference
  • FIG. 1 is a network architecture diagram of a telepresence system multipoint conference
  • FIG. 2 is a network architecture diagram of a telepresence system peer-to-peer conference
  • FIG. 3 is a flowchart of a telepresence system based signaling interaction method according to an embodiment of the present invention
  • 4 is a schematic diagram of a signaling interaction method based on a remote presentation system according to a preferred embodiment of the present invention
  • FIG. 5 is a structural block diagram of a first signaling interaction device based on a remote presentation system according to an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a second remote presentation system based signaling interaction device in accordance with an embodiment of the present invention.
  • FIG. 3 is a flowchart of a signaling interaction method based on a remote presentation system according to an embodiment of the present invention.
  • the signaling interaction method mainly includes the following processing: Step S302: The MCU or the remote presentation terminal receives the capability set message of the remote configuration, where the capability set message carries all the media and location information supported by the remote end.
  • Step S304 The MCU or the remote presentation terminal performs capability interaction with the remote end according to the location information of the supported media and the received association relationship
  • Step S306 The MCU or the remote presentation terminal and the remote end respectively open and interact The logical channel corresponding to the location information of the public capability.
  • each screen in the remote presentation terminal performs signaling interaction with the remote end as a single terminal, that is, a multi-signaling multimedia channel interaction mode, so that the control of the remote presentation terminal is very complicated.
  • a remote end (which may be an MCU or a remote presentation terminal) constructs a capability set message and sends it to the MCU or telepresence terminal involved in FIG.
  • the MCU or telepresence terminal supports The location information of the media and the association relationship carried in the received capability set message interact with the remote end capability, each way The media uses a separate logical channel for media transmission. It can be seen that the H225 and H245 processes can be performed only once, and the ability to negotiate the common capabilities of multiple media. In turn, the remote presentation terminal control can be simplified, and the integration of the remote presentation system and the traditional conference television can be realized. It should be noted that, in FIG. 3, an MCU or a remote presentation terminal at one end of the telepresence system is taken as an example.
  • the remote MCU or the remote presentation terminal while performing step S302 to step S304, the remote MCU or the remote presentation terminal also The capability set message constructed by the MCU or the remote presentation terminal mentioned in FIG. 3 is synchronously received, where the capability set message carries the association relationship between the media supported by the MCU or the remote presentation terminal and the location information;
  • the location information of the media and the received associations interact with the MCU or telepresence terminal mentioned in FIG. That is, both ends of the capability interaction need to simultaneously construct a message and perform a capability interaction.
  • the type of the foregoing media may be at least one of the following: audio, primary video, secondary video. But it can also be other types of media.
  • the following processing may also be included:
  • the remote end constructs a capability set message according to the number of channels and location information of the media supported by the remote end; wherein, the remote end constructs the capability set message according to the number of channels and location information of all media supported by the remote end, including: The optional capability set is added, where the number of the optional capability sets added is determined according to the number of media supported by the remote end, and the added optional capability set corresponds to the media supported by the remote end;
  • the selection capability concentrates on adding location information, and establishes an association relationship between all media supported by the remote end and location information.
  • the remote end sends its constructed capability set message.
  • a telepresence terminal system based on the H323 protocol, in which the MCU or the remote presentation terminal includes a signaling processing module, and the signaling processing module functions to establish a call, capability interaction, open logical channel, and media location information interaction. Wait.
  • the present invention relates to establishing a call procedure, which is equivalent to a standard H225 signaling procedure.
  • the traditional H323 conference TV MCU/remote presentation terminal generally only includes one channel of audio, one main video and other media capabilities. Therefore, when constructing a telepresence terminal capability set (terminalCapabilitySet) message, a synchronization capability (simultaneous Capabilities) contains only one audio.
  • the terminalCapabilitySet capability set message constructed by the remote terminal (MCU or telepresence terminal) mentioned above is based on the audio, main video, and auxiliary video supported by the actual device itself. Frequency and other media channels to fill in the alternativeCapabilitySet.
  • the number of audio, main video, and auxiliary video media supported by the remote presentation terminal may be different from the number of screens supported by the remote presentation terminal. The number of media channels such as audio, main video, and auxiliary video that are actually supported shall prevail.
  • the simultaneousCapabilities of the telepresence terminal capability set should include two audio alternativeCapabilitySets and three main video alternativeCapabilitySets.
  • the capability set message when constructing the capability set message, it is also necessary to consider the concept of the location, for example, where the video stream corresponding to the local display needs to be determined. Therefore, you need to include an attribute in the capability set alternativeCapabilitySet to describe the optional capability location information. When you are able to negotiate public capabilities, you need to consider location information.
  • the MCU or the remote presentation terminal needs to consider the location information when interacting with the remote end.
  • a telepresence terminal that only includes a mid-channel audio/video media and a remote presentation terminal including a left-screen, a mid-screen, and a right-screen three-channel audio/video media perform the capability interaction because the media locations shared by the two parties are in the middle screen. Therefore, the ability to interact only interacts with the audio and video common capabilities of the mid-screen.
  • the remote end (MCU or telepresence terminal) places the optional capability information of the default location capability at the forefront of the synchronization capability set when constructing the synchronization capability set in the capability set message.
  • the H323 telepresence system accesses the ordinary conference TV terminal, because the attribute of the location information is not included in the alternativeCapabilitySet, the location information is the middle screen by default (other default locations can also be specified), and the remote presentation is performed.
  • the alternativeCapabilitySet of the default location capability is placed at the front of the simpleCapabilities to ensure that the correct public capabilities can be interacted with in the default location.
  • the attribute of the media location information is not included in the logical channel message, its location information still uses the default value.
  • step S306 the following processing may be further included: (1) the MCU or the remote presentation terminal interacts with the remote end to open a logical channel message, where each open logical channel message carries the media transmitted by the logical channel. Input location information at the sender;
  • the MCU or the telepresence terminal, and the remote end respectively determine the output position of the media according to the received open logical channel message; (3)
  • the MCU or the remote presentation terminal and the remote end respectively open logical channels corresponding to the location information of the common capability obtained by the interaction, and interactively confirm the message.
  • an attribute is required in the open logical channel message between the MCU and the remote presentation terminal, the remote presentation terminal, and the remote presentation terminal to indicate the location of the media sent by the current logical channel on the local end.
  • the open logical channel message must be able to indicate which media capacity, type (audio, main video, secondary video, etc.) the logical channel transmits, and also indicate which location of the media is output.
  • the number of the foregoing logical channels may be the same as the number of media included in the public capability obtained by the interaction.
  • the display location information is carried in the open logical channel message by using at least one of the following manners: Method 1: expanding the session identifier (sessionID) field, and the value of the extended sessionID field includes location information; An attribute field used to represent display location information. An attribute is required in the open logical channel message to indicate the location of the media transmitted by the current logical channel at the local end.
  • the representation of the location information may be extended to the sessionID field, for example, 10 for left audio, 11 for middle audio, 12 for right audio, 13 for left main video, 14 for middle video, 15 Indicates the right main video, 16 indicates the left auxiliary video, 17 indicates the middle auxiliary video, and 18 indicates the right auxiliary video.
  • the location information may also be added with a Location attribute in the open logical channel message to indicate that the media local end transmits the location information transmitted by the logical channel.
  • the signaling interaction process between the remote presentation terminal and the remote presentation terminal is described as an example.
  • the signaling interaction process between the MCU and the remote presentation terminal is similar to the foregoing process.
  • the signaling interaction process mainly includes the call setup process and the H245 process.
  • For the establishment of the call process refer to the H225 RAS and CS procedures specified in the standard.
  • the difference between the present invention and the traditional conference television is mainly in the H245 signaling interaction process.
  • the signaling interaction method mainly includes the following processing: Step S402, performing a master-slave determination process between the remote presentation terminal 1 and the remote presentation terminal 2, the process being consistent with the master-slave determination process in the H245 protocol, change.
  • Step S404 the telepresence terminal 1 constructs and sends a capability set message, where the synchronization capability of the capability set message is based on the audio, main video, and auxiliary video media path supported by the actual device itself.
  • Count the number of alternativeCapabilitySets (the number of telepresence terminal screens can be different from the actual supported audio/video media channels, that is, the three-screen telepresence terminal can only support two audio capabilities).
  • a Location attribute is added to the AlternativeCapabilitySet to describe the optional capability location information, and the media is associated with the location.
  • the alternativeCapabilitySet can be defined as follows:
  • the remote presentation terminal 1 supports three channels of audio and three channels of main video. Then analogCapabilities need to contain a left-channel audio alternativeCapabilitySet, where Location is 0; - a middle-channel audio alternativeCapabilitySet, where Location is 1; a right-channel audio alternativeCapabilitySet, where Location is 2; - a left-channel video alternativeCapabilitySet, where Location is 0; - A middle channel video alternativeCapabilitySet, where Location is 1; a right channel video alternativeCapabilitySet, where Location is 2.
  • Step S406 when the remote presentation terminal 2 receives the capability set sent by the remote presentation terminal 1 and performs capability interaction, the location information is also referred to based on the original H245 protocol.
  • the capability of the telepresence terminal 1 to transmit audio includes three functions: left, center, and right
  • the main video capability includes three left, middle, and right
  • the remote presentation terminal 2 is a single screen remote presentation.
  • the terminal only supports the audio and the main video of the middle channel.
  • the capability is interactive, the common capability of the middle channel shared by both parties can be mutually interacted, that is, the capability of the road sound/main video support in the remote presentation terminal 1 and the road/main video in the remote presentation terminal 2 Supported capabilities to interact.
  • the telepresence terminal 1 left channel audio capability support ⁇ G711 , G722 ⁇ , the middle channel audio capability support ⁇ G711 , G722 ⁇ , the right channel audio capability support ⁇ G711 , G722 ⁇ , the left channel main video capability support ⁇ H263cif , H264cif ⁇ , the main video capability support ⁇ H263cif, H264cif ⁇ , the right main video capability support ⁇ H263cif, H264cif ⁇ , the remote presentation terminal 2 is a single screen telepresence terminal, the left and the right road do not contain the sound / main Video capability, mid-range audio capability support ⁇ G722 ⁇ , the main video capability of the middle channel supports ⁇ H264cif ⁇ , then the common interactive capability is the middle channel/main frequency capability.
  • Step S408 the remote presentation terminal 2 replies to the remote presentation terminal 1 with the capability of the interaction. If the public capability is exchanged, the remote presentation terminal 2 replies to the remote presentation terminal 1 with a terminal capability set confirmation (terminalCapabilitySetAck) message. The telepresence terminal 2 then replies to the telepresence terminal 1 with a terminal Capability Set Reject message.
  • Step S410 the telepresence terminal 2 constructs and sends a capability set message, and the step flow is consistent with step S404.
  • Step S412 the telepresence terminal 1 performs capability interaction with the remote end according to the location information of the media it supports and the received association relationship. The step flow is consistent with step S406.
  • Step S414 the remote presentation terminal 1 replies to the remote presentation terminal 2 with a capability interaction result, and the step flow is consistent with step S408. It should be noted that the above steps S410 to S414 are performed in synchronization with the above steps S404 to S408. Step S416, if the public capability is exchanged, the process of opening the logical channel is entered, and the remote presentation terminal 2 sends an open logical channel message to the remote presentation terminal 1, and the number of open logical channel messages sent and the number of media included in the shared public capability are transmitted. Similarly, in this example, the middle screen audio and the middle screen main video are interactively connected, and then the remote presentation terminal 2 sends two open logical channel messages to the remote presentation terminal 1.
  • An attribute is required in the open logical channel message to indicate the location of the media transmitted by the current logical channel at the local end.
  • the representation of the location information can extend the meaning of the sessionID field.
  • the H323 protocol specifies that the sessionID is an integer from 0 to 255, 1 for audio, 2 for the main video, 3 for T.120, 4 for far-shake capability, and other values not defined.
  • the telepresence system can further extend the sessionID value, such as 10 for left channel audio, 11 for middle channel audio, 12 for right channel audio, 13 for left main video, 14 for middle main video, 15 for right main video, 16 Indicates the left auxiliary video, 17 indicates the middle auxiliary video, and 18 indicates the right auxiliary video.
  • the location information may also be added with a Location attribute in the open logical channel message to indicate that the media local end transmits the location information transmitted by the logical channel.
  • Step S420 the telepresence terminal 1 sends an open logical channel message to the remote presentation terminal 2, and the step flow is consistent with step S416.
  • Step S422 the remote presentation terminal 2 replies to the remote presentation terminal 1 to open the logical channel confirmation message, and the step flow is consistent with step S418. It should be noted that the above steps S420 to S422 are performed in synchronization with the above steps S416 to S418.
  • the MCU or the remote presentation terminal uses a single signaling multimedia channel to perform signaling interaction with the remote end, that is, only the H225 and H245 processes are performed once, and the capability of multi-channel audio/main video/secondary video is negotiated.
  • the public capabilities at the same time, the ability to negotiate specific media capabilities and location information, each media uses a separate logical channel for media transmission.
  • the remote presentation terminal control can be simplified, and the integration of the remote presentation system and the traditional conference television can be realized.
  • the signaling interaction device is configured in an MCU or a remote presentation terminal.
  • the device includes: a receiving module 10, configured to receive a capability set message of a remote configuration, where the capability set message carries all the remote support The relationship between the media and the location information; the capability interaction module 20 is configured to perform capability interaction with the remote end according to the location information of the media supported by the MCU or the remote presentation terminal and the received association relationship; the channel opening module 30 is configured to open the interaction.
  • the logical channel corresponding to the location information of the public capability.
  • the type of the foregoing media may be at least one of the following: audio, primary video, secondary video. But it can also be other types of media.
  • a remote end (which may be an MCU, or a remote presentation terminal) constructs a capability set message and sends it to the MCU or telepresence terminal 10 involved in FIG. 5, according to which the MCU or telepresence terminal 10
  • the location information of the supported media and the association relationship carried in the received capability set message interact with the remote end capability. It can be seen that the H225 and H245 processes can be performed only once, and the capability of the multi-media media can be negotiated.
  • the channel opening module 30 may further include: a sending unit 300, configured to open a logical channel message to the remote end, where each of the open logical channel messages carries the media transmitted by the logical channel.
  • FIG. 7 is a structural block diagram of a second type of telepresence system-based signaling interaction apparatus according to an embodiment of the present invention.
  • the device is disposed in the MCU and the telepresence terminal. As shown in FIG. 7, the device includes: a constructing module 40 configured to construct a capability set message according to the number of channels and location information of the media supported by the device; and a sending module 50 configured to transmit the configuration The capability set message of the module construction.
  • the configuration module 40 is further configured to: when the synchronization capability set is configured, add an optional capability set, where the number of the added optional capability sets is determined according to the number of channels supported by the remote end, Adding an optional capability set to the remotely supported media one-to-one; adding the location information in the optional capability set, and establishing the all media supported by the remote end and the location information connection relation.
  • the construction module 40 is configured to place the optional capability information of the default location capability at the forefront of the synchronization capability set when constructing the synchronization capability set in the capability set message. It is guaranteed to be able to interact with the correct public capabilities in the default location.
  • the number of the open logical channel messages may be the same as the number of media included in the public capability obtained by the interaction. For example, if the interaction is to obtain one-channel audio and one-channel main video, both ends of the capability interaction need to send two open logical channel messages to each other. And the number of the logical channels opened is the same as the number of media included in the public capability obtained by the interaction.
  • the display location information is carried in the open logical channel message by using at least one of the following manners: Method 1: expanding the session identifier sessionID field, where the value of the extended session ID field includes the location information; : Add an attribute field to indicate display location information.
  • Method 1 expanding the session identifier sessionID field, where the value of the extended session ID field includes the location information
  • Add an attribute field to indicate display location information.
  • MCU or telepresence terminal adopts single signaling multimedia channel mode and remote end Signaling interaction, that is, the H225 and H245 processes are performed only once, and the ability to negotiate the common capabilities of multiple media.
  • the remote presentation terminal control can be simplified, and the integration of the remote presentation system and the traditional conference television can be realized.

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  • Engineering & Computer Science (AREA)
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  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Telephonic Communication Services (AREA)

Abstract

本发明提供了一种基于远程呈现系统的信令交互方法及装置,在上述方法中,MCU或远程呈现终端接收远端构造的能力集消息,其中,能力集消息携带有远端支持的全部媒体与位置信息的关联关系;MCU或远程呈现终端根据其支持的媒体的位置信息以及接收到的关联关系与远端进行能力交互;所述MCU或所述远程呈现终端、以及所述远端分别打开交互得出的公共能力的位置信息所对应的逻辑信道。根据本发明提供的技术方案,可以简化远程呈现终端控制,实现远程呈现系统与传统会议电视的融合。

Description

基于远程呈现系统的信令交互方法及装置 技术领域 本发明涉及通信领域, 具体而言, 涉及一种基于远程呈现系统的信令交互方法及 装置。 背景技术 远程呈现系统, 指的是经过精心的环境设计, 使与会者有身临其境的现场感的会 议电视系统。 相比传统视频会议系统而言, 具有能够提供真人大小的图像、 眼神交流 效果、 更加流畅的运动以及远端参会者精确的肢体行为的优点, 极大程度上改善了视 频通信的体验。 传统的会议电视远程呈现终端, 一般包含一路音频、 一路主视频、 一路辅视频, 而远程呈现系统远程呈现终端有别于传统会议电视所用的远程呈现终端,一般有单屏、 双屏、 三屏、 多屏之分, 这里的屏指的是用于呈现远方远程呈现终端的大显示器, 几 屏就包含几个显示器, 相应的就有几路音频、 几路主视频, 同时各路媒体还需要与位 置信息进行绑定。 在远程呈现系统中, 存在多点会议组网架构以及点对点会议组网架构。 如图 1所 示的远程呈现系统中, 包括: 多点控制单元 (Multipoint Control Unit, 简称为 MCU)、 三屏远程呈现终端 1、 三屏远程呈现终端 2、 三屏远程呈现终端 3、 单屏远程呈现终端 4。 如图 2所示的远程呈现系统中, 包括: 三屏远程呈现终端 1、 单屏远程呈现终端 2, 其中, 远程呈现终端 1和远程呈现终端 2直接通讯。 CISCO针对基于会话启动协议(Session Initiation Protocol, 简称为 SIP)的远程呈 现系统提出了一种网真互操作协议 (TIP)。 但是, 目前 Η323 协议针对远程呈现系统 的 MCU与远程呈现终端 (具体可以参见图 1 )、 远程呈现终端与远程呈现终端 (具体 可以参见图 2) 之间如何进行多路音 /视频的信令交互、 如何进行多路媒体传输、 如何 进行媒体与位置信息的绑定还没有提出明确的技术方案。 相关技术中,远程呈现终端中各个屏都作为一个单独的终端与远端进行信令交互, 即多信令多媒体通道交互方式, 这样就存在远程呈现终端的控制非常复杂的问题。 发明内容 本发明提供了一种基于远程呈现系统的信令交互方法及装置, 以至少解决相关技 术中远程呈现终端中各个屏都作为一个单独的终端与远端进行信令交互, 导致远程呈 现终端的控制非常复杂的问题。 根据本发明的一个方面, 提供了一种基于远程呈现系统的信令交互方法。 根据本发明的基于远程呈现系统的信令交互方法包括: MCU或远程呈现终端接收 远端构造的能力集消息, 其中, 该能力集消息携带有远端支持的媒体与位置信息的关 联关系; MCU或远程呈现终端根据其支持的媒体的位置信息以及接收到的关联关系与 远端进行能力交互; MCU或远程呈现终端、 以及远端分别打开交互得出的公共能力的 位置信息所对应的逻辑信道。 在所述 MCU和所述远程呈现终端接收所述远端构造的所述能力集消息之前, 还 包括: 所述远端根据其支持的全部媒体的路数和位置信息构造所述能力集消息; 所述 远端发送其构造的所述能力集消息。 上述远端根据其支持的全部媒体的路数和位置信息构造所述能力集消息包括: 所 述远端在构造同步能力集时, 添加可选能力集, 其中, 所述添加的可选能力集的数目 根据所述远端支持的媒体的路数确定, 所述添加的可选能力集与所述远端支持的媒体 一一对应; 所述远端在所述可选能力集中增加所述位置信息, 并建立所述远端支持的 全部媒体与所述位置信息的所述关联关系。 上述远端构造所述能力集消息包括: 所述远端在构造所述能力集消息中的同步能 力集时, 将默认位置能力的可选能力信息置于所述同步能力集的最前部。 上述 MCU或所述远程呈现终端、 以及所述远端分别打开交互得出的公共能力的 位置信息所对应的逻辑信道包括: 所述 MCU或所述远程呈现终端与所述远端之间交 互打开逻辑信道消息, 其中, 各个所述打开逻辑信道消息中携带有该逻辑信道传送的 媒体在发送端的输入位置信息; 所述 MCU或所述远程呈现终端、 以及所述远端分别 根据接收到的打开逻辑信道消息确定媒体的输出位置; 所述 MCU或所述远程呈现终 端与所述远端分别打开所述逻辑信道, 并交互确认消息。 上述逻辑信道的数目与交互得到的公共能力中包含的媒体数目相同。 通过以下至少之一的方式在所述打开逻辑信道消息中携带所述输出位置信息: 对 会话标识 sessionID字段进行扩展, 扩展后的所述 sessionID字段的值包含所述位置信 息; 增加设置为表示所述输出位置信息的属性字段。 上述媒体的类型包括以下至少之一: 音频、 主视频、 辅视频。 根据本发明的另一方面, 提供了一种基于远程呈现系统的信令交互装置。 根据本发明的基于远程呈现系统的信令交互装置, 设置于 MCU或远程呈现终端, 包括: 接收模块, 设置为接收远端构造的能力集消息, 其中, 该能力集消息携带有远 端支持的全部媒体与位置信息的关联关系; 能力交互模块, 设置为根据 MCU或远程 呈现终端支持的媒体的位置信息以及接收到的关联关系与远端进行能力交互; 信道打 开模块, 设置为打开交互得出的公共能力的位置信息所对应的逻辑信道。 上述信道打开模块包括: 发送单元, 设置为向远端打开逻辑信道消息, 其中, 各 个所述打开逻辑信道消息中携带有该逻辑信道传送的媒体在发送端的输入位置信息; 确定单元, 设置为根据接收到的打开逻辑信道消息确定媒体的输出位置; 处理单元, 设置为打开所述逻辑信道, 并回复确认消息。 根据本发明的又一方面, 提供了一种基于远程呈现系统的信令交互装置。 根据本发明的基于远程呈现系统的信令交互装置, 设置于 MCU或远程呈现终端, 包括: 构造模块, 设置为根据其支持的媒体的路数和位置信息构造能力集消息; 发送 模块, 设置为发送构造模块构造的能力集消息。 上述构造模块, 设置为在构造所述能力集消息中的同步能力集时, 将默认位置能 力的可选能力信息置于所述同步能力集的最前部。 通过本发明, MCU或者远程呈现终端采用单信令多媒体通道方式与远端进行信令 交互, 同时将媒体信息与位置信息进行了绑定, 解决了相关技术中远程呈现终端中各 个屏都作为一个单独的终端与远端进行信令交互, 导致远程呈现终端的控制非常复杂 的问题,进而可以简化远程呈现终端控制, 实现远程呈现系统与传统会议电视的融合。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发 明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是远程呈现系统多点会议的组网架构图; 图 2是远程呈现系统点对点会议的组网架构图; 图 3为根据本发明实施例的基于远程呈现系统的信令交互方法的流程图; 图 4为根据本发明优选实施例的基于远程呈现系统的信令交互方法的示意图; 图 5 为根据本发明实施例的第一种基于远程呈现系统的信令交互装置的结构框 图; 图 6为根据本发明优选实施例的第一种基于远程呈现系统的信令交互装置的结构 框图; 以及 图 7 为根据本发明实施例的第二种基于远程呈现系统的信令交互装置的结构框 图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 图 3为根据本发明实施例的基于远程呈现系统的信令交互方法的流程图。 如图 3 所示, 该信令交互方法主要包括以下处理: 步骤 S302: MCU或远程呈现终端接收远端构造的能力集消息, 其中, 该能力集 消息携带有远端支持的全部媒体与位置信息的关联关系; 步骤 S304: MCU或远程呈现终端根据其支持的媒体的位置信息以及接收到的关 联关系与远端进行能力交互; 步骤 S306: MCU或远程呈现终端、 以及远端分别打开交互得出的公共能力的位 置信息所对应的逻辑信道。 相关技术中,远程呈现终端中各个屏都作为一个单独的终端与远端进行信令交互, 即多信令多媒体通道交互方式, 这样就存在远程呈现终端的控制非常复杂的问题。 在 图 3所示的方法中, 远端(可以是 MCU, 也可以是远程呈现终端)构造能力集消息并 发送至图 3中涉及的 MCU或远程呈现终端,该 MCU或远程呈现终端根据其支持的媒 体的位置信息以及接收到的能力集消息中携带的关联关系与远端进行能力交互, 各路 媒体都采用单独的逻辑信道进行媒体传输。 由此可见, 可以仅进行一次 H225、 H245 过程, 能力协商出来多路媒体的公共能力。 进而可以简化远程呈现终端控制, 实现远 程呈现系统与传统会议电视的融合。 需要注意的是, 图 3中以远程呈现系统中一端的 MCU或远程呈现终端为例进行 说明, 在具体实现过程中, 在执行步骤 S302至步骤 S304的同时, 远端的 MCU或远 程呈现终端也同步接收图 3中提到的 MCU或远程呈现终端构造的能力集消息,其中, 该能力集消息携带有上述 MCU或远程呈现终端支持的媒体与位置信息的关联关系; 远端也根据其支持的媒体的位置信息以及接收到的关联关系与图 3中提到的 MCU或 远程呈现终端进行能力交互。 即需要进行能力交互的两端同时构造消息并执行能力交 互。 优选地, 上述媒体的类型可以是以下至少之一: 音频、 主视频、 辅视频。 但也可 以是其他类型的媒体。 优选地, 在执行步骤 S302之前, 还可以包括以下处理:
( 1 ) 远端根据其支持的媒体的路数和位置信息构造能力集消息; 其中, 远端根据其支持的全部媒体的路数和位置信息构造能力集消息包括: 远端 在构造同步能力集时, 添加可选能力集, 其中, 上述添加的可选能力集的数目根据远 端支持的媒体的路数确定, 添加的可选能力集与远端支持的媒体一一对应; 远端在可 选能力集中增加位置信息, 并建立远端支持的全部媒体与位置信息的关联关系。
(2) 远端发送其构造的能力集消息。 基于 H323协议的远程呈现终端系统, 该系统中不论是 MCU还是远程呈现终端, 均包含一个信令处理模块, 该信令处理模块的作用为建立呼叫、 能力交互、 打开逻辑 信道、 媒体位置信息交互等。 其中, 本发明涉及的建立呼叫过程, 等同于标准的 H225 信令过程。 传统的 H323会议电视 MCU/远程呈现终端一般仅包含一路音频、一路主视频及其 他媒体能力, 所以, 在构造远程呈现终端能力集 (terminalCapabilitySet) 消息时, 一 个 同 步能力 ( simultaneousCapabilities ) 只包含一个音频 的可选能力 ( alternativeCapability Set )和一个主视频的 alternativeCapabilitySet。然而, 对于远程呈 现系统, 上面提到的远端 (MCU或者远程呈现终端) 所构造的 terminalCapabilitySet 能力集消息中的 simultaneousCapabilities根据实际设备本身支持的音频、主视频、辅视 频等媒体路数来填写 alternativeCapabilitySet, 在具体实施过程中, 远程呈现终端支持 的音频、 主视频、 辅视频媒体路数跟该远程呈现终端所支持的屏数有可能不等, 构造 能力集消息时以实际支持的音频、 主视频、 辅视频等媒体路数为准。 比如, 某远程呈 现终端支持两路音频、 三路主视频, 那么该远程呈现终端能力集的 simultaneousCapabilities 要包含两个音频的 alternativeCapabilitySet 和三个主视频的 alternativeCapabilitySet。 此外, 对于远程呈现系统, 在构造能力集消息时, 还需要考虑位置的概念, 比如 视频码流对应在本端哪个位置显示出来都是需要确定的。 所以, 需要在能力集 alternativeCapabilitySet中包含一个属性来描述该可选能力位置信息。 能力协商公共能 力的时候, 需要考虑位置信息。 在步骤 S304中, MCU或远程呈现终端与远端交互公共能力的时候需要考虑位置 信息。 例如, 一个只包含中屏一路音 /视频媒体远程呈现终端和一个包含左屏、 中屏、 右屏三路音 /视频媒体远程呈现终端进行能力交互时, 由于双方共有的媒体位置为中 屏, 所以能力交互时仅交互中屏的音频、 视频公共能力。 优选地, 远端(MCU或远程呈现终端)在构造能力集消息中的同步能力集时, 将 默认位置能力的可选能力信息置于同步能力集的最前部。 在具体实施过程中, H323 远程呈现系统中接入普通的会议电视终端时, 由于其 alternativeCapabilitySet中没有表示位置信息的属性, 则默认其位置信息为中屏 (也可 以指定其他默认位置), 远程呈现系统构造 simultaneousCapabilities时, 将默认位置能 力的 alternativeCapabilitySet放到 simultaneousCapabilities最前部, 以保证能够在默认 位置交互出正确的公共能力。 同样, 如果打开逻辑信道消息中不包含媒体位置信息的 属性, 那么它的位置信息仍然采用默认值。 通过上述处理, 可以实现远程呈现系统与 传统会议电视的有效融合。 优选地, 在步骤 S306中, 可以进一步包括以下处理: ( 1 ) MCU或远程呈现终端与远端之间交互打开逻辑信道消息, 其中, 各个打开 逻辑信道消息中携带有该逻辑信道传送的媒体在发送端的输入位置信息;
(2) MCU或远程呈现终端、 以及远端分别根据接收到的打开逻辑信道消息确定 媒体的输出位置; (3 ) MCU或远程呈现终端与远端分别打开交互得出的公共能力的位置信息所对 应的逻辑信道, 并交互确认消息。 在优选实施过程中, MCU与远程呈现终端、远程呈现终端与远程呈现终端之间打 开逻辑信道消息中需要有一个属性用来表示当前逻辑信道发送的媒体在本端显示的位 置。 进一步说, 打开逻辑信道消息除了要能表示该逻辑信道传输那种媒体能力、 类型 (音频、 主视频、 辅视频等), 还要能表示该路媒体由哪一个位置输出的。 其中, 上述逻辑信道的数目可以与交互得到的公共能力中包含的媒体数目相同。 例如, 交互得出一路中屏音频、 一路中屏主视频, 那么进行能力交互的两端需要互相 向远端发送两条打开逻辑信道消息。 优选地,可以通过以下至少之一的方式在打开逻辑信道消息中携带显示位置信息: 方式一: 对会话标识(sessionID)字段进行扩展, 扩展后的 sessionID字段的值包含位 置信息; 方式二: 增加用于表示显示位置信息的属性字段。 打开逻辑信道消息中需要有一个属性用来表示当前逻辑信道传送的媒体在本端显 示的位置。在优选实施过程中,位置信息的表示可以对 sessionID字段进行扩展,例如, 10表示左路音频、 11表示中路音频、 12表示右路音频、 13表示左路主视频、 14表示 中路主视频、 15表示右路主视频、 16表示左路辅视频、 17表示中路辅视频、 18表示 右路辅视频等。 位置信息的表示也可以在打开逻辑信道消息中增加一个 Location属性 用来表示该逻辑信道所传输的媒体本端发送位置信息。 以下结合图 4描述上述优选实施方式。 图 4为根据本发明优选实施例的远程呈现系统的信令交互方法的示意图。 本实施 例主要以远程呈现终端与远程呈现终端点对点的信令交互流程为例进行说明, MCU与 远程呈现终端的信令交互流程与上述流程类似。 信令交互过程主要包括呼叫建立过程 和 H245过程两部分, 建立呼叫过程具体可以参见标准规定的 H225 RAS、 CS过程, 此处不再累述。 本发明与传统会议电视不同之处主要在 H245 信令交互过程。 如图 4 所示, 该信令交互方法主要包括以下处理: 步骤 S402, 远程呈现终端 1和远程呈现终端 2之间进行主从确定过程, 该过程与 H245协议中的主从确定过程一致, 没有改变。 步骤 S404, 远程呈现终端 1构造并发送能力集消息, 其中, 该能力集消息中的同 步能力 simultaneousCapabilities根据实际设备本身支持的音频、主视频、辅视频媒体路 数来填写 alternativeCapabilitySet个数(远程呈现终端屏数可以与实际支持的音 /视频媒 体路数不同, 即三屏远程呈现终端可以仅支持两路音频能力)。 AlternativeCapabilitySet 中增加一个 Location属性来描述该可选能力位置信息,将媒体与位置关联起来。例如, alternativeCapabilitySet可以定义如下:
AlternativeCapabilitySet: :=SEQUENCE
location Location, alternativeCapabilitySet SIZE (1..256) OF Capability TableEntryNumber
Location: :=INTEGER (0..10) 其中, 0表示左路; 1表示中路; 2表示右路可扩展 进一步说, 本实施例中, 远程呈现终端 1 支持三路音频、 三路主视频, 则 simultaneousCapabilities 就需要包含一个左路音频 alternativeCapabilitySet, 其中 Location为 0; —个中路音频 alternativeCapabilitySet, 其中 Location为 1; 一个右路音 频 alternativeCapabilitySet, 其中 Location为 2; —个左路视频 alternativeCapabilitySet, 其中 Location为 0; —个中路视频 alternativeCapabilitySet, 其中 Location为 1; 一个右 路视频 alternativeCapabilitySet, 其中 Location为 2。 步骤 S406,远程呈现终端 2接收到远程呈现终端 1发来的能力集后进行能力交互 时, 在原有 H245协议的基础上还要参考位置信息。 进一步说, 本实施例中, 远程呈现终端 1发来的能力集中音频能力包含左、 中、 右三路, 主视频能力包含左、 中、 右三路, 而远程呈现终端 2是个单屏远程呈现终端, 仅支持中路的音频和主视频, 能力交互时就只能交互出双方共有的中路公共能力, 即 用远程呈现终端 1中路音 /主视频支持的能力与远程呈现终端 2中路音 /主视频支持的能 力进行交互。 举例说明, 假设本例远程呈现终端 1左路音频能力支持 { G711 , G722},中路音频 能力支持{ G711 , G722},右路音频能力支持 { G711 , G722} , 左路主视频能力支持 { H263cif, H264cif}, 中路主视频能力支持 { H263cif, H264cif}, 右路主视频能力支持 { H263cif, H264cif} , 远程呈现终端 2为单屏远程呈现终端, 左路右路均不包含音 /主 视频能力, 中路音频能力支持 { G722},中路主视频能力支持 { H264cif }, 那么最终交互 出来的公共能力为中路音 /主频能力。 步骤 S408, 远程呈现终端 2给远程呈现终端 1回复能力交互结果, 如果交互出公 共能力, 远程呈现终端 2 则给远程呈现终端 1 回复终端能力集确认 (terminalCapabilitySetAck)消息, 如果没有交互出公共能力, 远程呈现终端 2则给远 程呈现终端 1回复终端能力集拒绝 (terminalCapabilitySetReject) 消息。 步骤 S410, 远程呈现终端 2构造并发送能力集消息, 该步骤流程与步骤 S404— 致。 步骤 S412,远程呈现终端 1根据其支持的媒体的位置信息以及接收到的关联关系 与远端进行能力交互。 该步骤流程与步骤 S406—致。 步骤 S414, 远程呈现终端 1给远程呈现终端 2回复能力交互结果, 该步骤流程与 步骤 S408—致。 需要注意的是, 上述步骤 S410至步骤 S414与上述步骤 S404至步骤 S408同步执 行。 步骤 S416, 如果交互出公共能力, 则进入打开逻辑信道流程, 远程呈现终端 2向 远程呈现终端 1发送打开逻辑信道消息, 发送的打开逻辑信道消息的数量跟交互出来 的公共能力中包含的媒体数目相同, 本例中交互来一路中屏音频、 一路中屏主视频, 那么远程呈现终端 2就向远程呈现终端 1发送两条打开逻辑信道消息。 打开逻辑信道 消息中需要有一个属性用来表示当前逻辑信道传送的媒体在本端显示的位置。 位置信 息的表示可以对 sessionID字段含义进行扩展, 目前 H323协议规定 sessionID为 0到 255的整数, 1表示音频, 2表示主视频, 3表示 T.120, 4表示远摇能力, 其他数值未 定义, 远程呈现系统可以对 sessionID值进一步进行扩展, 比如 10表示左路音频、 11 表示中路音频、 12表示右路音频、 13表示左路主视频、 14表示中路主视频、 15表示 右路主视频、 16表示左路辅视频、 17表示中路辅视频、 18表示右路辅视频等。 位置 信息的表示也可以在打开逻辑信道消息中增加一个 Location属性用来表示该逻辑信道 所传输的媒体本端发送位置信息。
OpenLogicalChannel ::=SEQUENCE
location Location, Location: :=INTEGER (0..10) 其中, 0表示左路; 1表示中路; 2表示右路可扩展 步骤 S418, 远程呈现终端 1给远程呈现终端 2回复打开逻辑信道确认消息。 步骤 S420, 远程呈现终端 1向远程呈现终端 2发送打开逻辑信道消息, 该步骤流 程与步骤 S416—致。 步骤 S422, 远程呈现终端 2给远程呈现终端 1回复打开逻辑信道确认消息, 该步 骤流程与步骤 S418—致。 需要注意的是, 上述步骤 S420至步骤 S422与上述步骤 S416至步骤 S418同步执 行。 逻辑信道打开完毕也就意味着远程呈现终端的各路媒体通道都打开了, 信令过程 完毕。 接下来的媒体接收发送与传统会议电视处理方法一致。 本实施例中, MCU或者远程呈现终端采用单信令多媒体通道方式与远端进行信令 交互, 也就是说仅进行一次 H225、 H245过程, 能力协商出来多路音频 /主视频 /辅视频 等媒体的公共能力, 同时能力协商时将具体的媒体能力与位置信息进行了绑定, 各路 媒体都采用单独的逻辑信道进行媒体传输。 进而可以简化远程呈现终端控制, 实现远 程呈现系统与传统会议电视的融合。 图 5为根据本发明实施例的基于远程呈现系统的信令交互装置的结构框图。 如图 5所示, 该信令交互装置设置于 MCU或远程呈现终端; 该装置包括: 接收模块 10, 设置为接收远端构造的能力集消息, 其中, 能力集消息携带有远端支持的全部媒体与 位置信息的关联关系; 能力交互模块 20, 设置为根据 MCU或远程呈现终端支持的媒 体的位置信息以及接收到的关联关系与远端进行能力交互; 信道打开模块 30, 设置为 打开交互得出的公共能力的位置信息所对应的逻辑信道。 优选地, 上述媒体的类型可以是以下至少之一: 音频、 主视频、 辅视频。 但也可 以是其他类型的媒体。 在图 5所示的系统中, 远端(可以是 MCU, 也可以是远程呈现终端)构造能力集 消息并发送至图 5中涉及的 MCU或远程呈现终端 10, MCU或远程呈现终端 10根据 其支持的媒体的位置信息以及接收到的能力集消息中携带的关联关系与远端进行能力 交互, 由此可见, 可以仅进行一次 H225、 H245过程, 能力协商出来多路媒体的公共 能力。 进而可以简化远程呈现终端控制, 实现远程呈现系统与传统会议电视的融合。 优选地, 如图 6所示, 信道打开模块 30可以进一步包括: 发送单元 300, 设置为 向远端打开逻辑信道消息, 其中, 各个所述打开逻辑信道消息中携带有该逻辑信道传 送的媒体在发送端的输入位置信息; 确定单元 302, 设置为根据接收到的打开逻辑信 道消息确定媒体的输出位置; 处理单元 304, 设置为打开交互得出的公共能力的位置 信息所对应的逻辑信道, 并回复确认消息。 图 7 为根据本发明实施例的第二种基于远程呈现系统的信令交互装置的结构框 图。 上述装置设置于 MCU和远程呈现终端, 如图 7所示, 上述装置包括: 构造模块 40, 设置为根据其支持的媒体的路数和位置信息构造能力集消息; 发送模块 50, 设置 为发送构造模块构造的能力集消息。 优选地,上述构造模块 40,进一步设置为在构造同步能力集时,添加可选能力集, 其中, 所述添加的可选能力集的数目根据所述远端支持的媒体的路数确定, 所述添加 的可选能力集与所述远端支持的媒体一一对应; 在所述可选能力集中增加所述位置信 息, 并建立所述远端支持的全部媒体与所述位置信息的所述关联关系。 在优选实施过程中, 构造模块 40, 设置为在构造能力集消息中的同步能力集时, 将默认位置能力的可选能力信息置于同步能力集的最前部。 可以保证能够在默认位置 交互出正确的公共能力。 同样, 如果打开逻辑信道消息中不包含媒体位置信息的属性, 那么它的位置信息仍然采用默认值。 通过上述处理, 可以实现远程呈现系统与传统会 议电视的有效融合。 其中, 上述打开逻辑信道消息的数目可以与交互得到的公共能力中包含的媒体数 目相同。 例如, 交互得出一路中屏音频、 一路中屏主视频, 那么进行能力交互的两端 需要互相向远端发送两条打开逻辑信道消息。 且打开的所述逻辑信道的数目与交互得 到的公共能力中包含的媒体数目相同。 优选地,可以通过以下至少之一的方式在打开逻辑信道消息中携带显示位置信息: 方式一: 对会话标识 sessionID字段进行扩展, 扩展后的所述 sessionID字段的值包含 所述位置信息; 方式二: 增加用于表示显示位置信息的属性字段。 需要注意的是, 上述两种基于远程呈现系统的信令交互装置中各模块相互结合的 优选工作方式具体可以参见图 3至图 4的描述, 此处不再赘述。 综上所述, 借助本发明提供的上述实施例, 弥补了 H323 协议没有提供远程呈现 系统如何进行信令交互的不足, 在不增加媒体处理及逻辑控制复杂度的前提下, 对 H323 协议进行扩展, 解决了多路音 /视频的信令交互、 如何进行多路媒体传输、 如何 进行媒体与位置信息的绑定等一系列问题, MCU或者远程呈现终端采用单信令多媒体 通道方式与远端进行信令交互, 即仅进行一次 H225、 H245过程, 能力协商出来多路 媒体的公共能力。 进而可以简化远程呈现终端控制, 实现远程呈现系统与传统会议电 视的融合。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以用通用 的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多个计算装置所 组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码来实现, 从而可以将 它们存储在存储装置中由计算装置来执行,或者将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。 这样, 本发明不限 制于任何特定的硬件和软件结合。 以上仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技术人 员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的任何 修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种基于远程呈现系统的信令交互方法, 包括:
多点控制单元 MCU或远程呈现终端接收远端构造的能力集消息, 其中, 所述能力集消息携带有所述远端支持的全部媒体与位置信息的关联关系; 所述 MCU或所述远程呈现终端根据其支持的媒体的位置信息以及接收到 的所述关联关系与所述远端进行能力交互;
所述 MCU或所述远程呈现终端、 以及所述远端分别打开交互得出的公共 能力的位置信息所对应的逻辑信道。
2. 根据权利要求 1所述的方法, 其中, 在所述 MCU和所述远程呈现终端接收所 述远端构造的所述能力集消息之前, 还包括:
所述远端根据其支持的全部媒体的路数和位置信息构造所述能力集消息; 所述远端发送其构造的所述能力集消息。
3. 根据权利要求 2所述的方法, 其中, 所述远端根据其支持的全部媒体的路数和 位置信息构造所述能力集消息包括:
所述远端在构造同步能力集时, 添加可选能力集, 其中, 所述添加的可选 能力集的数目根据所述远端支持的媒体的路数确定, 所述添加的可选能力集与 所述远端支持的媒体一一对应;
所述远端在所述可选能力集中增加所述位置信息, 并建立所述远端支持的 全部媒体与所述位置信息的所述关联关系。
4. 根据权利要求 2所述的方法, 其中, 所述远端构造所述能力集消息包括: 所述远端在构造所述能力集消息中的同步能力集时, 将默认位置能力的可 选能力信息置于所述同步能力集的最前部。
5. 根据权利要求 1所述的方法, 其中, 所述 MCU或所述远程呈现终端、 以及所 述远端分别打开交互得出的公共能力的位置信息所对应的逻辑信道包括: 所述 MCU或所述远程呈现终端与所述远端之间交互打开逻辑信道消息, 其中, 各个所述打开逻辑信道消息中携带有该逻辑信道传送的媒体在发送端的 输入位置信息; 所述 MCU或所述远程呈现终端、 以及所述远端分别根据接收到的打开逻 辑信道消息确定媒体的输出位置;
所述 MCU或所述远程呈现终端与所述远端分别打开所述逻辑信道, 并交 互确认消息。
6. 根据权利要求 5所述的方法, 其中, 所述逻辑信道的数目与交互得到的公共能 力中包含的媒体数目相同。
7. 根据权利要求 5所述的方法, 其中, 通过以下至少之一的方式在所述打开逻辑 信道消息中携带所述输出位置信息:
对会话标识 sessionID字段进行扩展, 扩展后的所述 sessionID字段的值包 含所述位置信息;
增加设置为表示所述输出位置信息的属性字段。
8. 根据权利要求 1至 7中任一项所述的方法, 其中, 所述媒体的类型包括以下至 少之一: 音频、 主视频、 辅视频。
9. 一种基于远程呈现系统的信令交互装置, 设置于 MCU或远程呈现终端, 包括: 接收模块, 设置为接收远端构造的能力集消息, 其中, 所述能力集消息携 带有所述远端支持的全部媒体与位置信息的关联关系;
能力交互模块, 设置为根据所述 MCU或所述远程呈现终端支持的媒体的 位置信息以及接收到的所述关联关系与所述远端进行能力交互;
信道打开模块, 设置为打开交互得出的公共能力的位置信息所对应的逻辑 信道。
10. 根据权利要求 9所述的装置, 其中, 所述信道打开模块包括:
发送单元, 设置为向远端打开逻辑信道消息, 其中, 各个所述打开逻辑信 道消息中携带有该逻辑信道传送的媒体在发送端的输入位置信息;
确定单元, 设置为根据接收到的打开逻辑信道消息确定媒体的输出位置; 处理单元, 设置为打开所述逻辑信道, 并回复确认消息。
11. 一种基于远程呈现系统的信令交互装置, 设置于 MCU或远程呈现终端, 包括: 构造模块, 设置为根据其支持的全部媒体的路数和位置信息构造能力集消 息; 发送模块, 设置为发送所述构造模块构造的所述能力集消息。 根据权利要求 11所述的装置, 其中, 所述构造模块, 设置为在构造所述能力集 消息中的同步能力集时, 将默认位置能力的可选能力信息置于所述同步能力集 的最前部。
PCT/CN2012/074139 2011-07-15 2012-04-16 基于远程呈现系统的信令交互方法及装置 WO2012155739A1 (zh)

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104219487B (zh) * 2013-06-01 2019-05-07 中兴通讯股份有限公司 远程呈现端点的能力交互方法及装置、数据流
CN104219485B (zh) * 2013-06-01 2019-07-23 中兴通讯股份有限公司 远程呈现端点的能力交互方法及装置
CN104219486B (zh) * 2013-06-01 2019-05-17 中兴通讯股份有限公司 远程呈现端点的能力交互方法及装置
CN104219483B (zh) * 2013-06-01 2019-10-25 中兴通讯股份有限公司 远程呈现端点的能力交互方法及装置
CN104219484B (zh) * 2013-06-01 2019-05-31 中兴通讯股份有限公司 远程呈现端点的能力交互方法及装置
CN104519023B (zh) * 2013-09-29 2019-08-27 中兴通讯股份有限公司 能力协商处理方法、装置及远程呈现端点
CN104519305A (zh) 2013-09-29 2015-04-15 中兴通讯股份有限公司 端点信息交互处理方法、装置及远程呈现端点
CN105245487B (zh) 2014-06-11 2019-10-11 中兴通讯股份有限公司 远程呈现系统中协议栈的调度方法及装置
CN105744209B (zh) * 2014-12-12 2019-01-25 中兴通讯股份有限公司 媒体数据流的传输方法和装置
CN105635794B (zh) * 2015-10-21 2019-05-14 宇龙计算机通信科技(深圳)有限公司 一种录屏方法及系统
US9635072B1 (en) * 2016-11-02 2017-04-25 Veeva Systems Inc. System and method for remote presentation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101345845A (zh) * 2008-08-15 2009-01-14 中兴通讯股份有限公司 一种在ims环境中实现视频会议业务的方法
CN101483749A (zh) * 2009-01-20 2009-07-15 中兴通讯股份有限公司 基于媒体服务器的视频会议实现方法和系统
CN101820523A (zh) * 2010-02-26 2010-09-01 中兴通讯股份有限公司 一种会话处理方法和系统

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1258918C (zh) * 2000-02-01 2006-06-07 中兴通讯股份有限公司 一种扩大会议电视系统容量的方法
CN100505864C (zh) * 2005-02-06 2009-06-24 中兴通讯股份有限公司 一种多点视频会议系统及其媒体处理方法
CN1964475A (zh) * 2006-12-06 2007-05-16 杭州华为三康技术有限公司 视频会议的实现方法、控制设备与用户终端
CN101370114B (zh) * 2008-09-28 2011-02-02 华为终端有限公司 视频及音频处理方法、多点控制单元和视频会议系统
CN101594512B (zh) * 2009-06-30 2012-01-18 中兴通讯股份有限公司 实现高清多画面的终端、多点控制单元、系统及方法
CN101867770A (zh) * 2010-05-26 2010-10-20 中兴通讯股份有限公司 获取远端坐席位置信息的方法及远程呈现系统

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101345845A (zh) * 2008-08-15 2009-01-14 中兴通讯股份有限公司 一种在ims环境中实现视频会议业务的方法
CN101483749A (zh) * 2009-01-20 2009-07-15 中兴通讯股份有限公司 基于媒体服务器的视频会议实现方法和系统
CN101820523A (zh) * 2010-02-26 2010-09-01 中兴通讯股份有限公司 一种会话处理方法和系统

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