WO2010045778A1 - 一种紧急广播的传输方法及装置 - Google Patents

一种紧急广播的传输方法及装置 Download PDF

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Publication number
WO2010045778A1
WO2010045778A1 PCT/CN2009/000841 CN2009000841W WO2010045778A1 WO 2010045778 A1 WO2010045778 A1 WO 2010045778A1 CN 2009000841 W CN2009000841 W CN 2009000841W WO 2010045778 A1 WO2010045778 A1 WO 2010045778A1
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WO
WIPO (PCT)
Prior art keywords
emergency broadcast
frame
multiplexed
terminal
broadcast message
Prior art date
Application number
PCT/CN2009/000841
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English (en)
French (fr)
Inventor
韦福
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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
Priority to US13/124,943 priority Critical patent/US20110289527A1/en
Priority to EP09821499.2A priority patent/EP2348669A4/en
Publication of WO2010045778A1 publication Critical patent/WO2010045778A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/13—Arrangements for device control affected by the broadcast information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/16—Arrangements for broadcast or for distribution of identical information repeatedly

Definitions

  • the present invention relates to the field of mobile multimedia broadcasting, and in particular, to a method and apparatus for transmitting an emergency broadcast.
  • Emergency broadcasting is a method of using a broadcast communication system to notify the public of an emergency.
  • Emergency broadcasts provide a quick and fast response to emergencies such as natural disasters, accident disasters, public health and social security that cause or can cause major casualties, property damage, ecological damage and serious social hazards that endanger public safety. Way of notification.
  • Emergency broadcasting is an important application of mobile multimedia broadcasting, which is implemented in the form of broadcast messages.
  • the terminal After receiving the emergency broadcast message, the terminal displays the information to the user according to the level and type of the emergency broadcast message.
  • emergency broadcast messages are in the form of text, pictures, and audio and video.
  • the mobile multimedia broadcast technology transmits a multimedia broadcast signal in a time division multiplexing manner, and the duration of the broadcast channel frame is 1 second, which is composed of 40 25 millisecond time slots, and one or more time slots can transmit data of one multiplexed frame package. .
  • the multiplexed frame is divided into a multiplexed frame header, a multiplexed frame payload, and a padding.
  • the mobile multimedia broadcast technology is transmitted in a manner that separates the control information from the service data.
  • the time slot transmits the control information
  • the corresponding multiplexing frame encapsulates the control information.
  • FIG. 1 the duration of the broadcast channel frame is 1 second, which is composed of 40 25 millisecond time slots, and one or more time slots can transmit data of one multiplexed frame package.
  • the multiplexed frame is divided into a multiplexed frame header, a multiplexed frame payload, and a padding.
  • the mobile multimedia broadcast technology is transmitted in a manner that separates the control information from the
  • the multiplex frame encapsulates the service data
  • the multiplex frame of the encapsulated service data includes one or more multiplexed subframes
  • each multiplex subframe encapsulates the video segment and the audio segment. And one or more of the data segments.
  • FIG. 4 is a structural block diagram of an emergency broadcast front-end device 400 in the prior art, including an emergency broadcast server 410, a multiplexer 420, a modulator 430, and a transmitting device 440 that are sequentially connected.
  • FIG. 5 is a structural block diagram of a television application module 500 of a terminal in the prior art, including a demultiplexing unit 510, an emergency broadcast processing unit 520, and an emergency broadcast message display unit 530 connected in sequence.
  • FIG. 6 shows a transmission method of an emergency broadcast in the prior art, which includes the following steps:
  • the emergency broadcast server 410 constructs an emergency broadcast message (editing text, encoding the image or audio and video, etc.), setting an emergency broadcast message level, and transmitting the constructed emergency broadcast message and emergency broadcast message level to the multiplexer 420;
  • the multiplexer 420 After receiving the emergency broadcast message, the multiplexer 420 sets the value of the "emergency broadcast indication" field in the multiplexing frame header of a multiplex frame to 1, and encapsulates the emergency broadcast message and the emergency broadcast message level into the In the multiplexing frame 0 after the multiplexing frame, the emergency broadcast message and its level are encapsulated into the control information table of the multiplexing frame 0, the identifier of the control information table is set to 0x10, and the multiplexed frame of the completed encapsulation is sent.
  • modulator 430 To modulator 430;
  • the above multiplex frame 0 is a multiplex frame 0 of the next broadcast channel frame after the broadcast channel frame to which the multiplex frame of the "emergency broadcast indication" field is 1 belongs.
  • the modulator 430 After receiving the multiplexed frame of the completed encapsulation, the modulator 430 modulates the received multiplexed frame onto the physical channel, and the transmitting device 440 transmits the multiplexed frame to the air through the electromagnetic signal;
  • the transmitting device 440 typically transmits an emergency broadcast signal in a carousel mode (the electromagnetic signal of the same emergency broadcast message is continuously retransmitted).
  • the carousel duration is typically set to about 10 minutes, and the carousel duration is the duration that the transmitting device 440 continuously repeats the transmission of the emergency broadcast signal.
  • the terminal receives the electromagnetic signal sent by the transmitting device 440, and the multiplexer frame is tuned by the tuner, and the multiplexed frame is sent to the demultiplexing unit 510 of the terminal television application module 500;
  • the demultiplexing unit 510 After receiving the multiplexing frame, the demultiplexing unit 510 determines, according to the “emergency broadcast indication” field, whether the emergency broadcast message is included in the next broadcast channel frame.
  • the demultiplexing unit 510 parses the emergency broadcast message level and the emergency broadcast data segment from the received multiplex frame 0 of the next broadcast channel frame, and sends the emergency broadcast data segment to the emergency.
  • the emergency broadcast processing unit 520 assembles the received emergency broadcast data segment into an emergency broadcast message, and transmits the emergency broadcast message and the emergency broadcast message level to the emergency broadcast message display unit.
  • the emergency broadcast message display unit 530 displays the emergency broadcast message according to the emergency broadcast level, if the emergency broadcast level is advanced (level 1 or 2), forcibly displays; if it is low level (3 or 4), prompts the user whether to display emergency Broadcast message, user select is displayed, otherwise not displayed.
  • the terminal user in order to save power, the terminal user usually turns off the terminal during periods when the terminal is not used very frequently. Most of the time, even if the terminal is powered on, the user does not always use the TV application module 500, that is, the TV application module 500 in most cases. Is off. When the TV application module 500 is not activated when the terminal is powered off or turned on, even if there is an emergency broadcast message at this time, the terminal cannot receive the call, and the purpose of alerting the user cannot be achieved, which may have catastrophic consequences.
  • the technical problem to be solved by the present invention is to provide an emergency broadcast transmission method and apparatus.
  • the terminal When the terminal is powered on and the television application module is turned off, the user can also ensure that the emergency broadcast message is received in time.
  • an emergency broadcast transmission method of the present invention includes: when the terminal is powered on and its television application module is turned off, the terminal starts an emergency broadcast background module; the tuner transmits the tuned multiplexed frame to the emergency broadcast background. Module; The emergency broadcast background module parses the emergency broadcast information after receiving the multiplex frame.
  • the terminal closes the emergency broadcast background module, and the tuner transmits the tuned multiplexed frame to the television application module; after receiving the multiplexed frame, the television application module parses the emergency broadcast information.
  • the terminal periodically turns the tuner on and off, and the cycle time is less than the carousel duration of the emergency broadcast transmitting device.
  • the terminal sets the timed power on, and turns on the terminal through the timed power on, and the timing interval of the timed power on is less than the carousel duration of the emergency broadcast transmitting device.
  • the emergency broadcast background module determines, according to the "emergency broadcast indication" field of the multiplexed frame header of the received multiplex frame, whether the next broadcast channel frame contains an emergency broadcast message, if the next If the broadcast channel frame does not contain an emergency broadcast message, the terminal is notified to set the timed power on, and the terminal is turned off.
  • the multiplexer separates the emergency broadcast message level and the emergency broadcast message, and encapsulates the emergency broadcast message level in a multiplexing frame header of the multiplexing frame or a multiplexer of the multiplexing frame.
  • the emergency broadcast message is encapsulated in the control information table of the multiplex frame 0 of the next broadcast channel frame of the multiplex frame.
  • the demultiplexing unit of the emergency broadcast background module parses the emergency broadcast message level from the multiplexed frame header of the received multiplexed frame or the multiplexed subframe header of the multiplexed subframe under the multiplexed frame.
  • the present invention also provides an emergency broadcast transmission apparatus, the apparatus comprising: a tuner and a television application module, the television application module is connected to the tuner, and further comprises an emergency broadcast background module, an emergency broadcast background module and tuning
  • the emergency broadcast background module is configured to parse the emergency broadcast message from the received multiplex frame sent by the tuner when the terminal is powered on and its television application module is turned off.
  • the transmission device of the emergency broadcast further includes an emergency broadcast front-end device
  • the emergency broadcast front-end device includes a multiplexer for separately separating and packaging the emergency broadcast message level and the emergency broadcast message, and packaging the emergency broadcast message level in a complex
  • the emergency broadcast message is encapsulated in the control information table of the multiplex frame 0 of the next broadcast channel frame of the multiplexed frame by the multiplexed frame header of the frame or the multiplexed subframe header of the multiplexed subframe of the multiplexed frame.
  • the emergency broadcast background module includes a demultiplexing unit that parses the emergency broadcast from the multiplexed frame header of the received multiplexed frame or the multiplexed subframe header of the multiplexed subframe under the multiplexed frame Message level.
  • the present invention uses the emergency broadcast background module to process the emergency broadcast message, which complements the TV application module to ensure that the user can receive the emergency broadcast message even if the terminal is turned off.
  • the emergency broadcast message can also be received by the method of the present invention, thereby ensuring that the user can receive the emergency broadcast message at any time, and achieve the purpose of providing emergency information to the user in time.
  • DRAWINGS 1 is a structural diagram of a mobile multimedia broadcast multiplexing frame header in the prior art
  • FIG. 2 is a structural diagram of a multiplexed frame payload of a mobile multimedia broadcast multiplex frame 0 in the prior art
  • FIG. 3 is a structural diagram of a multiplexed frame payload of a multiplex frame of a mobile multimedia broadcast encapsulated service data in the prior art
  • FIG. 4 is a structural block diagram of a front end device of an emergency broadcast in the prior art
  • FIG. 5 is a structural block diagram of an emergency broadcast terminal device in the prior art
  • Figure 7 is a block diagram showing the structure of a terminal device of the present invention.
  • FIG. 9 is a flowchart of processing of an emergency broadcast when the terminal is powered off according to the present invention. detailed description
  • the invention provides an emergency broadcast background module 700 in the terminal, and uses the emergency broadcast background module 700 to process the emergency broadcast message when the TV application module of the terminal is closed, so as to prompt the user to prompt the emergency broadcast message.
  • the 7 is a transmission apparatus of an emergency broadcast according to the present invention, including: a tuner 710, a television application module 500, and an emergency broadcast background module 700, and a television application module 500 and an emergency broadcast background module 700 are respectively connected to a tuner 710, wherein an emergency broadcast is provided.
  • the internal structure of the background module 700 is the same as that of the TV application module 500, and includes: a demultiplexing unit, an emergency broadcast processing unit, and an emergency broadcast message display unit that are sequentially connected.
  • the emergency broadcast background module 700 is for processing emergency broadcast messages with the television application module 500 turned off. At some point, the terminal only runs one of the emergency broadcast background module 700 and the television application module 500.
  • FIG. 8 is a diagram showing a method for processing an emergency broadcast by the present invention when the terminal is powered on, including:
  • the user starts up, after the terminal initialization is completed, the emergency broadcast background module 700 is started;
  • the TV application module 500 After the terminal is powered on, the TV application module 500 is in a closed state, and the user needs to perform an open operation. Can start.
  • the terminal receives the electromagnetic signal, and the multiplex frame is tuned by the tuner 710, and the multiplex frame is sent to the emergency broadcast background module 700, and the emergency broadcast background module 700 processes the multiplex frame (processing procedure refers to steps 605-608);
  • the tuner 710 sends the tuned multiplexed frame to the television application module 500, and the television application module 500 processes the multiplexed frame;
  • the terminal starts the emergency broadcast background module 700 again, and the tuner 710 sends the tuned multiplexed frame to the emergency broadcast background module 700, and the emergency broadcast background module 700 processes the multiplexed frame. .
  • the terminal may periodically turn the tuner 710 on and off, and the cycle time should be less than the carousel duration to ensure that the tuner 710 can receive the emergency. broadcast.
  • FIG. 9 shows a method for processing an emergency broadcast message by the present invention when the terminal is powered off, including:
  • the terminal sets the timed power on, and the timing interval should be less than the rotation duration of the transmitting device 440 transmitting the emergency broadcast message;
  • the timing interval refers to the time interval during which the terminal is turned off to the timed start of the terminal.
  • the timing interval is shorter than the duration of the broadcast of the emergency broadcast message to ensure that the terminal is turned on during the carousel duration of the emergency broadcast message to receive the emergency broadcast.
  • the terminal is turned off, and after the time is up, the emergency broadcast background module 700 is started, and the tuner 710 sends the demultiplexed multiplex frame to the emergency broadcast background module 700.
  • the demultiplexing unit of the emergency broadcast background module 700 parses the multiplex frame, and determines whether the next broadcast channel frame contains an emergency broadcast message according to the “emergency broadcast indication” field;
  • step 905 If the next broadcast channel frame does not contain the emergency broadcast message, notify the terminal to set the scheduled power on, the timing interval is smaller than the rotation duration of the emergency broadcast message sent by the transmitting device 440, and the hopping Go to step 902.
  • the multiplexer 420 encapsulates the emergency broadcast message and the emergency broadcast message level into the control information table of the multiplex frame 0.
  • the emergency broadcast message may also be used. The method for separating the encapsulation of the level and the emergency broadcast message, encapsulating the emergency broadcast message level in the multiplexing frame header or the multiplexing subframe header, and encapsulating the emergency broadcast message in the control information table of the multiplexing frame 0 of the next broadcast channel frame.
  • the demultiplexing unit of the TV application module 500 and the emergency broadcast background module 700 directly parses the emergency broadcast message level from the multiplex frame header or the multiplex subframe header, and parses the emergency from the multiplex frame 0 of the next broadcast channel frame. Broadcast data segment.
  • the emergency broadcast background module can be used to process the emergency broadcast message when the user is turned on and the television application module is turned off, and the television application module is complementary to ensure that the user can receive the emergency broadcast message. Even if the terminal is powered off, the emergency broadcast message can be received by the method of the present invention, thereby ensuring that the user can receive the emergency broadcast message at any time, and achieve the purpose of providing emergency information to the user in time.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Description

一种紧急广播的传输方法及装置
技术领域
本发明涉及移动多媒体广播领域， 尤其涉及一种紧急广播的传输方法及 装置。
背景技术
近年来， 数字移动多媒体广播技术和标准发展迅速， 各种标准为移动多 媒体广播终端用户提供了多种服务内容， 譬如广告、 天气预报、 新闻、 体育 节目、 综艺、 多媒体广播剧以及电影等， 用户可以根据自己的爱好选择移动 多媒体广播的服务节目。
紧急广播是一种利用广播通信系统向公众通告紧急事件的方法。 当发生 自然灾害、 事故灾难、 公共卫生和社会安全等突发事件， 造成或者可能造成 重大人员伤亡、 财产损失、 生态环境破坏和严重社会危害， 危及公共安全时， 紧急广播提供了一种迅速快捷的通告方式。 紧急广播是移动多媒体广播的一 种重要的应用， 釆用了广播消息的形式来实现。 终端收到紧急广播消息后， 根据紧急广播消息的级别和类型釆用相应的展示方式显示给用户。 其中， 紧 急广播消息有文字、 图片和音视频等形式。
移动多媒体广播技术釆用时分复用方式发送多媒体广播信号， 其广播信 道帧的持续时间为 1秒， 由 40个 25毫秒时隙组成， 一个或多个时隙可以传 送一个复用帧封装的数据。 如图 1所示， 在移动多媒体广播的复用帧结构中， 复用帧分为复用帧头、 复用帧净荷和填充三部分。 移动多媒体广播技术釆用 控制信息和业务数据分离的方式发送。 如图 2所示， 当时隙传送控制信息时， 对应复用帧封装控制信息。 如图 3所示， 当时隙传送业务数据时， 对应复用 帧封装业务数据， 封装业务数据的复用帧包括一个或多个复用子帧， 每个复 用子帧封装视频段、 音频段和数据段的其中一种或多种。
图 4为现有技术中紧急广播前端装置 400的结构框图， 包括依次相连的 紧急广播服务器 410、 复用器 420、 调制器 430和发射设备 440。 图 5为现有 技术中终端的电视应用模块 500 的结构框图， 包括依次相连的解复用单元 510、 紧急广播处理单元 520和紧急广播消息显示单元 530。 图 6所示为现有技术中紧急广播的传输方法， 包括以下步骤：
601 : 紧急广播服务器 410构建紧急广播消息（编辑文字， 对图像或音视 频进行编码等） 、 设置紧急广播消息级别， 将所构建的紧急广播消息和紧急 广播消息级别发送给复用器 420;
602:复用器 420接收到紧急广播消息后，将一复用帧的复用帧头中的 "紧 急广播指示" 字段的值设置为 1 , 并将紧急广播消息和紧急广播消息级别封 装到该复用帧之后的复用帧 0中， 其中， 紧急广播消息及其级别封装到该复 用帧 0的控制信息表中， 控制信息表的标识设置为 0x10, 并将完成封装的复 用帧发送给调制器 430;
上述复用帧 0是 "紧急广播指示" 字段为 1的复用帧所属广播信道帧之 后的下一广播信道帧的复用帧 0。
603: 调制器 430接收到完成封装的复用帧后， 将接收到的复用帧调制到 物理信道上， 发射设备 440通过电磁信号将复用帧发射到空中；
为方便终端接收， 提高终端接收效率， 发射设备 440通常釆用轮播方式 (同一紧急广播消息的电磁信号不断重播发送）发送紧急广播信号。 轮播持 续时间通常设置为 10分钟左右，轮播持续时间是指发射设备 440不断重复发 送紧急广播信号的持续时间。
604: 终端接收发射设备 440发送的电磁信号， 通过调谐器调谐得到复用 帧， 并将复用帧发送给终端电视应用模块 500的解复用单元 510;
605: 解复用单元 510接收到复用帧后， 解析复用帧头根据 "紧急广播指 示" 字段判断下一个广播信道帧中是否含有紧急广播消息；
如果 "紧急广播指示" 字段的值为 1 , 表示下一个广播信道帧中含有紧 急广播消息。
606: 如果下一个广播信道帧中含有紧急广播消息， 解复用单元 510从接 收到的下一个广播信道帧的复用帧 0中解析得到紧急广播消息级别和紧急广 播数据段， 并发送给紧急广播处理单元 520;
607: 紧急广播处理单元 520将接收到的紧急广播数据段拼装为紧急广播 消息， 将紧急广播消息与紧急广播消息级别发送给紧急广播消息显示单元 608: 紧急广播消息显示单元 530根据紧急广播级别显示紧急广播消息， 如果紧急广播级别为高级（ 1或 2级），则强制显示；如果为低级（ 3或 4级）， 则提示用户是否显示紧急广播消息， 用户选择是则显示， 反之不显示。
以上是现有技术中紧急广播的实现方法。 在实际中， 为节省电能， 终端 用户在终端使用不很频繁的时段通常会将终端关闭， 多数时间即使终端开机 用户也并不总是使用电视应用模块 500 , 即电视应用模块 500多数情况下均 处于关闭状态。 在终端关机或开机时电视应用模块 500未启动时， 即使此时 有紧急广播消息， 终端也无法进行接收， 无法达到警示用户的目的， 由此可 能产生灾难性的后果。
发明内容
本发明要解决的技术问题是提供一种紧急广播的传输方法及装置， 在终 端开机而电视应用模块关闭的情况下， 也能够保证用户及时接收到紧急广播 消息。
为解决上述技术问题， 本发明的一种紧急广播的传输方法包括： 当终端 开机且其电视应用模块关闭时， 终端启动紧急广播后台模块； 调谐器将调谐 得到的复用帧发送给紧急广播后台模块； 紧急广播后台模块接收到复用帧后， 解析出紧急广播信息。
进一步地， 当用户启动电视应用模块时， 终端关闭紧急广播后台模块， 调谐器将调谐得到的复用帧发送给电视应用模块； 电视应用模块接收到复用 帧后， 解析出紧急广播信息。
进一步地， 终端周期性打开和关闭调谐器， 周期时间小于紧急广播发射 设备的轮播持续时间。
进一步地， 当用户按关机键选择关机时， 终端设置定时开机， 通过定时 开机打开终端，定时开机的定时间隔小于紧急广播发射设备的轮播持续时间。
进一步地， 紧急广播后台模块根据接收到的复用帧的复用帧头的 "紧急 广播指示" 字段判断下一个广播信道帧中是否含有紧急广播消息， 如果下一 个广播信道帧中不含有紧急广播消息， 则通知终端设置定时开机， 并关闭终 端。
进一步地， 在紧急广播前端装置中， 复用器将紧急广播消息级别和紧急 广播消息分离封装， 将紧急广播消息级别封装在一复用帧的复用帧头或该复 用帧的复用子帧的复用子帧头中， 将紧急广播消息封装在复用帧的下一个广 播信道帧的复用帧 0的控制信息表中。
进一步地， 紧急广播后台模块的解复用单元从接收到的复用帧的复用帧 头或复用帧下的复用子帧的复用子帧头中解析紧急广播消息级别。
为解决上述技术问题， 本发明还提供一种紧急广播的传输装置， 该装置 包括： 调谐器和电视应用模块， 电视应用模块与调谐器相连， 还包括紧急广 播后台模块， 紧急广播后台模块与调谐器相连； 紧急广播后台模块用于当终 端开机且其电视应用模块关闭时， 从接收到的由调谐器发送的复用帧中解析 出紧急广播消息。
进一步地， 该紧急广播的传输装置还包括紧急广播前端装置， 紧急广播 前端装置包括复用器， 复用器用于将紧急广播消息级别和紧急广播消息分离 封装， 将紧急广播消息级别封装在一复用帧的复用帧头或该复用帧的复用子 帧的复用子帧头中， 将紧急广播消息封装复用帧的下一个广播信道帧的复用 帧 0的控制信息表中。
进一步地， 紧急广播后台模块包括解复用单元， 该解复用单元从接收到 的复用帧的复用帧头或复用帧下的复用子帧的复用子帧头中解析紧急广播消 息级别。
综上所述， 在用户开机而电视应用模块被关闭的情况下， 本发明釆用紧 急广播后台模块处理紧急广播消息， 与电视应用模块形成互补， 保证用户可 以接收到紧急广播消息， 即使终端关机时釆用本发明的方法也可以接收到紧 急广播消息， 从而保证了用户在任何时间均可以接收到紧急广播消息， 达到 及时向用户提供紧急信息的目的。
附图说明 图 1为现有技术中移动多媒体广播复用帧头的结构图；
图 2为现有技术中移动多媒体广播复用帧 0的复用帧净荷的结构图； 图 3为现有技术中移动多媒体广播封装业务数据的复用帧的复用帧净荷 的结构图；
图 4为现有技术中紧急广播的前端装置的结构框图；
图 5为现有技术中紧急广播终端装置的结构框图；
图 6为现有技术中传输紧急广播的处理流程图；
图 7为本发明的终端装置的结构框图；
图 8为本发明的终端开机时紧急广播的处理流程图；
图 9为本发明的终端关机时紧急广播的处理流程图。 具体实施方式
本发明在终端内增设一紧急广播后台模块 700, 在终端的电视应用模块 关闭的情况下使用该紧急广播后台模块 700处理紧急广播消息， 达到了及时 向用户提示紧急广播消息的目的。
下面结合附图对本发明的具体实施方式进行说明：
图 7所示为本发明紧急广播的传输装置， 包括： 调谐器 710、 电视应用 模块 500和紧急广播后台模块 700, 电视应用模块 500和紧急广播后台模块 700分别与调谐器 710相连， 其中紧急广播后台模块 700的内部结构与电视 应用模块 500相同， 均包括： 依次相连的解复用单元、 紧急广播处理单元和 紧急广播消息显示单元。
紧急广播后台模块 700用于在电视应用模块 500关闭的情况下处理紧急 广播消息。某一时刻，终端仅运行紧急广播后台模块 700与电视应用模块 500 的其中之一。
图 8所示为终端开机时本发明处理紧急广播的方法， 包括：
801 : 用户开机， 终端初始化完成后， 启动紧急广播后台模块 700;
终端开机后电视应用模块 500处于关闭状态， 需要用户执行打开操作才 能启动。
802: 终端接收电磁信号通过调谐器 710调谐得到复用帧， 将复用帧发送 给紧急广播后台模块 700, 紧急广播后台模块 700对复用帧进行处理（处理 过程参考步骤 605-608 ) ；
803: 当用户选择开启电视应用模块 500时， 终端关闭紧急广播后台模块
700, 调谐器 710将调谐得到的复用帧发送给电视应用模块 500, 电视应用模 块 500对复用帧进行处理；
804: 当用户选择退出电视应用模块 500时， 终端再次启动紧急广播后台 模块 700, 调谐器 710将调谐得到的复用帧发送给紧急广播后台模块 700, 紧 急广播后台模块 700对复用帧进行处理。
当釆用紧急广播后台模块 700处理复用帧时， 为减少不必要的功耗， 终 端可周期性打开和关闭调谐器 710, 周期时间应小于轮播持续时间， 以保证 调谐器 710能够接收紧急广播。
图 9所示为终端关机时本发明处理紧急广播消息的方法， 包括：
901 : 当用户按关机键选择关机时， 终端设置定时开机， 定时间隔应小于 发射设备 440发射紧急广播消息的轮播持续时间；
定时间隔是指终端关闭到终端定时开机的时间间隔， 定时间隔小于紧急 广播消息的轮播持续时间可以保证终端在紧急广播消息的轮播持续时间内开 机， 以接收到紧急广播。
902: 终端关闭， 定时时间到达后开机， 启动紧急广播后台模块 700, 调 谐器 710将解复用得到的复用帧发送给紧急广播后台模块 700;
903: 紧急广播后台模块 700的解复用单元对复用帧进行解析， 根据 "紧 急广播指示" 字段判断下一个广播信道帧中是否含有紧急广播消息；
904: 如果下一个广播信道帧中含有紧急广播消息， 则进行接收处理， 结 束；
905: 如果下一个广播信道帧中不含有紧急广播消息， 则通知终端设置定 时开机， 定时间隔小于发射设备 440发射紧急广播消息的轮播持续时间， 跳 转到步骤 902。
目前， 紧急广播前端装置 400中， 复用器 420是将紧急广播消息和紧急 广播消息级别一起封装到复用帧 0的控制信息表中， 为使终端处理方便， 也 可以釆用将紧急广播消息级别和紧急广播消息分离封装的方法， 将紧急广播 消息级别封装在复用帧头或复用子帧头中， 将紧急广播消息封装在下一个广 播信道帧的复用帧 0的控制信息表中。
电视应用模块 500和紧急广播后台模块 700的解复用单元直接从复用帧 头或复用子帧头中解析出紧急广播消息级别， 从下一个广播信道帧的复用帧 0中解析出紧急广播数据段。
当然， 本发明还可有其他多种实施例， 在不背离本发明精神及其实质的 些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 工业实用性
釆用本发明的方法和装置， 可以在用户开机而电视应用模块被关闭的情 况下， 釆用紧急广播后台模块处理紧急广播消息， 与电视应用模块形成互补， 保证用户可以接收到紧急广播消息， 即使终端关机时釆用本发明的方法也可 以接收到紧急广播消息， 从而保证了用户在任何时间均可以接收到紧急广播 消息， 达到及时向用户提供紧急信息的目的。

Claims

权 利 要 求 书
1、 一种紧急广播的传输方法， 包括：
当终端开机且其电视应用模块关闭时， 终端启动紧急广播后台模块； 调谐器将调谐得到的复用帧发送给所述紧急广播后台模块；
所述紧急广播后台模块接收到复用帧后， 解析出紧急广播信息。
2、 如权利要求 1所述的方法， 还包括：
当用户启动所述电视应用模块时， 终端关闭所述紧急广播后台模块， 所 述调谐器将调谐得到的复用帧发送给所述电视应用模块；
所述电视应用模块接收到复用帧后， 解析出紧急广播信息。
3、 如权利要求 1所述的方法， 其中，
所述终端周期性打开和关闭调谐器， 周期时间小于紧急广播发射设备的 轮播持续时间。
4、 如权利要求 1所述的方法， 还包括：
当用户关机时， 终端设置定时开机， 通过定时开机打开终端， 定时开机 的定时间隔小于紧急广播发射设备的轮播持续时间。
5、 如权利要求 4所述的方法， 其中，
所述紧急广播后台模块根据接收到的复用帧的复用帧头的 "紧急广播指 示" 字段判断下一个广播信道帧中是否含有紧急广播消息， 如果下一个广播 信道帧中不含有紧急广播消息， 则通知终端设置定时开机， 并关闭终端。
6、 如权利要求 1所述的方法， 还包括：
在紧急广播前端装置中， 复用器将紧急广播消息级别和紧急广播消息分 离封装， 将紧急广播消息级别封装在一复用帧的复用帧头或该复用帧的复用 子帧的复用子帧头中， 将紧急广播消息封装在所述复用帧的下一个广播信道 帧的复用帧 0的控制信息表中。
7、 如权利要求 6所述的方法， 其中，
所述紧急广播后台模块的解复用单元从接收到的复用帧的复用帧头或复 用帧下的复用子帧的复用子帧头中解析紧急广播消息级别。
8、 一种紧急广播的传输装置， 该装置包括： 调谐器和电视应用模块， 所 述电视应用模块与所述调谐器相连， 其特征在于， 还包括紧急广播后台 模块， 所述紧急广播后台模块与所述调谐器相连；
所述紧急广播后台模块设置为当终端开机且其电视应用模块关闭时， 从 接收到的由所述调谐器发送的复用帧中解析出紧急广播消息。
9、 如权利要求 8所述的装置， 其中，
该紧急广播的传输装置还包括紧急广播前端装置， 所述紧急广播前端装 置包括复用器， 所述复用器设置为将紧急广播消息级别和紧急广播消息分离 封装， 将紧急广播消息级别封装在一复用帧的复用帧头或该复用帧的复用子 帧的复用子帧头中， 将紧急广播消息封装在所述复用帧的下一个广播信道帧 的复用帧 0的控制信息表中。
10、 如权利要求 9所述的装置， 其中，
所述紧急广播后台模块包括解复用单元， 该解复用单元从接收到的复用 帧的复用帧头或复用帧下的复用子帧的复用子帧头中解析紧急广播消息级 别。
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