CN100394783C - Roaming Method of Mobile Digital TV - Google Patents
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Abstract
Translated fromChineseDescription
Translated fromChinese技术领域technical field
本发明涉及移动数字电视的漫游处理方案，特别涉及移动数字电视的发射与漫游数字机顶盒的接收方案。The invention relates to a roaming processing scheme of a mobile digital TV, in particular to a scheme of transmitting a mobile digital TV and receiving a roaming digital set-top box.
背景技术Background technique
在数字电视飞速发展的时代，地面无线数据传输成为一个网络通讯中的最为重要的一种形态之一，必然也会有很大的发展。目前的无线传输方式主要有全球数字移动电话系统(GSM)标准、码分多路访问通信系统(CDMA)标准、802.11g标准(一种最新的无线联网标准)以及DMB-T方案。In the era of rapid development of digital TV, terrestrial wireless data transmission has become one of the most important forms of network communication, and it is bound to have great development. The current wireless transmission methods mainly include the Global System for Mobile Phones (GSM) standard, the Code Division Multiple Access Communication System (CDMA) standard, the 802.11g standard (a newest wireless networking standard) and the DMB-T solution.
DMB-T方案的目的是提供一种数字信息传输方法，系统的核心采用了mQAM/QPSK的时域同步正交频分复用(TDS-OFDM：Time DomainSynchronous-Orthogonal Frequency Division Multiplexing)调制技术；系统使用创新的前向纠错编码技术；并实现了分级调制和编码；同时可以实现多媒体业务。The purpose of the DMB-T scheme is to provide a digital information transmission method. The core of the system uses mQAM/QPSK Time Domain Synchronous Orthogonal Frequency Division Multiplexing (TDS-OFDM: Time Domain Synchronous-Orthogonal Frequency Division Multiplexing) modulation technology; the system Use innovative forward error correction coding technology; and realize hierarchical modulation and coding; at the same time, multimedia services can be realized.
其中DMB-T的优点十分明显：Among them, the advantages of DMB-T are very obvious:
(1)廉价，其成本可能只是别的无线传输方式的几十分之一；(1) Cheap, its cost may be only a few tenths of other wireless transmission methods;
(2)高带宽，是现有其它无线传输方式的几倍甚至几十倍以上；(2) High bandwidth, which is several times or even dozens of times that of other existing wireless transmission methods;
(3)传输距离远，覆盖范围大。(3) The transmission distance is long and the coverage area is large.
(4)移动接收。(4) Mobile reception.
在地面数字电视的迅速发展过程中，各地方台都建立了自己的地方运营，发射的网络和节目都不尽相同，这客观造成了，在移动机顶盒跨区域接收时出现不能锁频不能继续播放的情况。During the rapid development of terrestrial digital TV, local stations have established their own local operations, and the networks and programs they transmit are not the same. This objectively causes the frequency lock and cannot continue to play when the mobile set-top box receives across regions. Case.
发明内容Contents of the invention
本发明的目的在于提供一种跨区可以搜频和锁频继续播放的移动数字电视的漫游方法。The purpose of the present invention is to provide a mobile digital TV roaming method that can search and lock the frequency to continue playing across regions.
本发明的目的可以这样实现，设计一种移动数字电视的漫游方法，包括数字电视信号发射方法和漫游数字机顶盒的接收方法；The purpose of the present invention can be achieved like this, design a kind of roaming method of mobile digital TV, comprise the receiving method of digital TV signal transmission method and roaming digital set-top box;
所述数字电视信号发射方法包括：在至少2个区域内分别设置数字电视信号发射台；所述各区域的数字电视信号发射台在各自的数字电视信道中统一发送网络信息数据；The digital TV signal transmitting method includes: respectively setting digital TV signal transmitting stations in at least two areas; the digital TV signal transmitting stations in each area uniformly send network information data in their respective digital TV channels;
所述漫游数字机顶盒的接收方法包括：在当前播放节目的信号出现中断或者到达某地方边界时，机顶盒依据当前地址信息和当前发射台编码信息，模糊查询地图数据及网络信息数据；然后，根据数据查询处理结果搜寻当前发射台周围发射台的信号；在接收到周围发射台之一的信号后，切换至该发射台的频点和播放该发射台的节目。The method for receiving the roaming digital set-top box includes: when the signal of the currently broadcast program is interrupted or reaches the border of a certain place, the set-top box fuzzily inquires map data and network information data according to the current address information and the current transmitting station code information; then, according to the data Query processing results Search for the signals of the transmitting stations around the current transmitting station; after receiving the signal of one of the surrounding transmitting stations, switch to the frequency point of the transmitting station and play the program of the transmitting station.
本发明可实现移动机顶盒跨区域自动、平滑切换网络和节目。机顶盒在跨越不同的区域时，所有的切换操作都是在后台自动进行的，对于用户来说都是不可见的，省却了手动的麻烦。The invention can realize automatic and smooth switching of networks and programs across regions of the mobile set-top box. When the set-top box crosses different areas, all switching operations are automatically performed in the background, which is invisible to the user, saving manual trouble.
附图说明Description of drawings
图1是本发明的漫游机顶盒的信息处理示意图。Fig. 1 is a schematic diagram of information processing of the roaming set-top box of the present invention.
图2是本发明的漫游时发射塔与机顶盒的示意图。Fig. 2 is a schematic diagram of a transmission tower and a set-top box during roaming according to the present invention.
具体实施方式Detailed ways
以下结合实施例对本发明作进一步的描述。Below in conjunction with embodiment the present invention is further described.
一种移动数字电视的漫游方法，包括数字电视信号发射方法和漫游数字机顶盒的接收方法；A roaming method for mobile digital TV, including a digital TV signal transmitting method and a roaming digital set-top box receiving method;
所述数字电视信号发射方法包括：在至少2个区域内分别设置数字电视信号发射台；所述各区域的数字电视信号发射台在各自的数字电视信道中统一发送网络信息数据；The digital TV signal transmitting method includes: respectively setting digital TV signal transmitting stations in at least two areas; the digital TV signal transmitting stations in each area uniformly send network information data in their respective digital TV channels;
所述漫游数字机顶盒的接收方法包括：在当前播放节目的信号出现中断或者到达某地方边界时，数字机顶盒依据当前地址信息和当前发射台编码信息，模糊查询地图数据及网络信息数据；然后，根据数据查询处理结果搜寻当前发射台周围发射台的信号；在接收到周围发射台之一的信号后，切换至该发射台的频点和播放该发射台的节目，如图1所示。The receiving method of the roaming digital set-top box includes: when the signal of the currently broadcast program is interrupted or reaches a certain boundary, the digital set-top box fuzzily inquires map data and network information data according to the current address information and the current transmitting station code information; then, according to The data query processing results search for the signals of the surrounding transmitting stations of the current transmitting station; after receiving the signal of one of the surrounding transmitting stations, switch to the frequency point of the transmitting station and play the program of the transmitting station, as shown in Figure 1.
数字电视信号发射台至少在两个区域内分别设置，才会由此发生漫游的可能。大多数情况下，要保证信号的覆盖率，每个地区内通常至少设置2到3个发射台；如在市区内设置一个，在各区或县内各设置一个发射台等等。如图2所示，当F1信号失锁，机顶盒将自动跳转接收F2信号。The possibility of roaming will only occur if the digital TV signal transmitting stations are set up separately in at least two areas. In most cases, to ensure signal coverage, at least 2 to 3 transmitters are usually set up in each region; for example, one is set up in an urban area, and one transmitter is set up in each district or county, and so on. As shown in Figure 2, when the F1 signal is out of lock, the set-top box will automatically jump to receive the F2 signal.
所述数字电视信号的发射方法中，所述各区域的发射台在本台的各频道发送的信息中包含统一发送的节目信息数据。为了发挥让用户利用现有网络的优势，要求各发射台的各频道在正常发送演播节目信号以外同时发送统一制定的网络信息数据和节目信息数据；尽管各发射台的各频道所播放的节目不尽相同，但是在这些网络信息数据和节目信息数据中各个发射台的身份信息等数据都是统一制定的，漫游机顶盒可根据设置的这些信息去查找自动漫游，较快地搜频和锁频。In the method for transmitting digital TV signals, the information transmitted by the transmitting stations in each area includes the program information data sent uniformly in the information transmitted by the channels of the station. In order to allow users to take advantage of the existing network, each channel of each transmitting station is required to send uniformly formulated network information data and program information data in addition to the normal transmission of broadcast program signals; although the programs played by each channel of each transmitting station are different They are all the same, but in these network information data and program information data, the identity information and other data of each transmitting station are uniformly formulated, and the roaming set-top box can search for automatic roaming according to the set information, and search and lock the frequency quickly.
所述数字电视信号的发射方法中，所述各区域的发射台在数字电视信道中统一发送各区域所有的网络信息数据包含有：发射台编码、地方信息、频道参数信息的对照表。In the method for transmitting digital TV signals, the transmitting stations in each region uniformly send all the network information data in each region in the digital TV channel, including: a comparison table of transmitting station codes, local information, and channel parameter information.
对网络、节目信息数据可以采用多种方法进行广播下发。Network and program information data can be broadcast and distributed in various ways.
所述数字电视信号的发射方法中，所述网络信息数据和节目信息数据统一发送；其中网络信息数据的发送通过NIT或PMT表，节目信息数据的发送通过BAT、PAT或PMT表。网络和节目信息数据统一下发。例如，网络信息数据通过NIT、PMT表，网络信息数据表包含了网络中传送的TS/Multiplexes相关的组织信息，同时也传递了网络自身的物理特征；并且节目信息数据也被下发，例如，通过BAT、PAT、PMT传递节目信息。In the method for transmitting digital TV signals, the network information data and program information data are sent together; the network information data is sent through the NIT or PMT table, and the program information data is sent through the BAT, PAT or PMT table. The network and program information data are issued in a unified manner. For example, the network information data passes through the NIT and PMT tables, and the network information data table contains the organization information related to TS/Multiplexes transmitted in the network, and also conveys the physical characteristics of the network itself; and the program information data is also delivered, for example, Transfer program information through BAT, PAT, PMT.
所述数字电视信号的发射方法中，所述网络信息数据和节目信息数据的统一发送采用私有数据表。In the method for transmitting digital TV signals, the unified transmission of the network information data and program information data adopts a private data table.
所述网络信息数据的数据表内包含表代码(table_id)、段长度(section_length)、网络ID(network_id)、频率(frequency)、网络描述长度(network_descriptor_lenth)、网络描述(descriptor)和校验码(CRC_32)等数据；所述节目信息数据的数据表内包含表代码(table_id)、段长度(section_length)、网络ID(network_id)、节目名称(pgm_name)、节目PID(PCR_PID)、节目描述长度(network_descriptor_lenth)、网络描述(descriptor)和校验码(CRC_32)等数据。The data table of the network information data includes table code (table_id), section length (section_length), network ID (network_id), frequency (frequency), network description length (network_descriptor_lenth), network description (descriptor) and check code ( CRC_32) and other data; the data table of the program information data includes table code (table_id), segment length (section_length), network ID (network_id), program name (pgm_name), program PID (PCR_PID), program description length (network_descriptor_lenth ), network description (descriptor) and check code (CRC_32) and other data.
私有数据表可以采用如下格式。A private data table can take the following format.
网络信息数据格式：Network information data format:
其中：in:
●表代码(Table_id)：用以区分其他SI表。●Table code (Table_id): used to distinguish other SI tables.
●段长度(section_length)：私有表数据长度。●Segment length (section_length): private table data length.
●网络ID(network_id)：网络标识号，network_id的值是全网唯一。●Network ID (network_id): network identification number, the value of network_id is unique in the whole network.
●版本号(version_number)：●version number (version_number):
●频率(frequency)：相应网络发送的频率。●Frequency: The frequency sent by the corresponding network.
●网络描述长度(network_descriptor_lenth)；● Network description length (network_descriptor_lenth);
●网络描述(descriptor)；● network description (descriptor);
●校验码(CRC_32)。● check code (CRC_32).
节目信息数据格式Program Information Data Format
其中：in:
●表代码(Table_id)：用以区分其他SI表；●Table code (Table_id): used to distinguish other SI tables;
●段长度(section_length)：私有表数据长度；●Section length (section_length): private table data length;
●节目ID Pgm_id)：节目标识号；●Program ID (Pgm_id): program identification number;
●网络ID(network_id)：所属网络标识号；●Network ID (network_id): the identification number of the network to which it belongs;
●版本号(version_number)：●version number (version_number):
●节目名称(Pgm_name)；● program name (Pgm_name);
●节目PID(PCR_PID)；●Program PID (PCR_PID);
●节目描述长度(network_descriptor_lenth)；● program description length (network_descriptor_lenth);
●网络描述(descriptor)；● network description (descriptor);
●校验码(CRC_32)。● check code (CRC_32).
将网络信息数据和节目信息数据通过私有数据方式或规定表格的方式下发，规范了漫游数字电视的方法，方便灵活。The network information data and program information data are distributed through private data or specified forms, standardizing the method of roaming digital TV, which is convenient and flexible.
地图信息数据有两种方式提供给机顶盒。其一是：所述地图信息数据由发射台发射，移动机顶盒接收，存储在机顶盒的存储器中。其二是：所述地图信息数据是预先存储在机顶盒内的存储器中。The map information data is provided to the set-top box in two ways. One is: the map information data is transmitted by the transmitting station, received by the mobile set-top box, and stored in the memory of the set-top box. The second is: the map information data is pre-stored in the memory in the set-top box.
漫游数字电视接收装置包括移动机顶盒、天线和显示屏。显示屏通常采用液晶屏。移动机顶盒包括调谐器、解调芯片、主解码芯片、视频解码模块、视频放大模块、音频解码模块、音频放大模块和存储器。The roaming digital TV receiving device includes a mobile set-top box, an antenna and a display screen. The display usually adopts an LCD screen. The mobile set-top box includes a tuner, a demodulation chip, a main decoding chip, a video decoding module, a video amplification module, an audio decoding module, an audio amplification module and a memory.
在漫游数字机顶盒跨区域时，将会出现当前信号中断，机顶盒根据存储器内储存的或输入的当前地址信息数据以及原接收到的当前发射台编码信息数据和机内已存储的地图信息数据及频道信息表数据由处理器进行数据模糊查询处理，然后根据模糊查询处理结果的数据自动搜寻当前发射台周围发射台的信号，在接收到周围发射台之一的信号后，并自动切换频点，锁频和播放该发射台的节目，并提供多种方式切换。When the roaming digital set-top box crosses the region, the current signal will be interrupted, and the set-top box will use the current address information data stored in the memory or input, as well as the current coded information data of the current transmitting station received and the map information data and channels stored in the machine. The information table data is processed by fuzzy data query by the processor, and then automatically searches the signals of the transmitting stations around the current transmitting station according to the data of the fuzzy query processing results. After receiving the signal of one of the surrounding transmitting stations, it automatically switches the frequency point and locks Video and play the program of the launch station, and provide a variety of ways to switch.
所述跨网络播放节目为相同节目直接跳转；不同节目寻找默认节目或随机选择。两个发射台的节目是相同的，机顶盒就直接切换频点进行直接跳转。两个发射台的节目是不同的，可以采用播放默认节目，如后一发射台的第1频道的节目等等；或者就是随机播放后一发射台的节目。The cross-network broadcast program directly jumps to the same program; different programs search for a default program or randomly select it. The programs of the two transmitting stations are the same, and the set-top box directly switches the frequency point for direct jumping. The programs of the two transmitting stations are different, and the default program can be played, such as the program of channel 1 of the latter transmitting station, etc.; or the program of the latter transmitting station is played randomly.
机顶盒在跨越不同的区域时，所有的切换操作都是在后台自动进行的，对于用户来说都是不可见的，省却了手动的麻烦。When the set-top box crosses different areas, all switching operations are automatically performed in the background, which is invisible to the user, saving manual trouble.
上述移动数字电视漫游方法实施，可应用于DMB-T的网络中以及DMB-T漫游机顶盒中，同样也可应用于DMB-H、DVB-T、DVB-H系统中。The implementation of the mobile digital TV roaming method above can be applied to DMB-T networks and DMB-T roaming set-top boxes, and can also be applied to DMB-H, DVB-T, and DVB-H systems.
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|---|---|
| CN1750604A (en) | 2006-03-22 |
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