CN100394783C - Roaming method of mobile digital TV. - Google Patents
Roaming method of mobile digital TV. Download PDFInfo
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- CN100394783C CN100394783C CNB2005101001322A CN200510100132A CN100394783C CN 100394783 C CN100394783 C CN 100394783C CN B2005101001322 A CNB2005101001322 A CN B2005101001322A CN 200510100132 A CN200510100132 A CN 200510100132A CN 100394783 C CN100394783 C CN 100394783C
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Abstract
The present invention relates to a roaming method of mobile digital televisions, which relates to a roaming proposal of mobile digital televisions, particularly to a transmitting proposal of a mobile digital television and a receiving proposal of a roaming digital stb. The roaming method of mobile digital televisions comprises a transmitting method of a digital television signal and a receiving method of a roaming digital stb, wherein the transmitting method of a digital television signal comprises transmitting platforms of the digital television signal, wherein the transmitting platforms are respectively arranged in at least two areas. A transmitting platform of the digital television signal of each area uniformly transmits network information data in each digital television communication channel. The receiving method of the roaming digital stb comprises that when signals are interrupted or arrive in some place boundary, the stb is used for hazily inquiring map data and the data of a network information table according to current address information and current coded information of the transmitting platforms; then, the signals of the transmitting platforms around the current transmitting platforms are searched according to inquiring and processing results of the data; after the signals of one of the surrounding transmitting platforms are received, the signals are switched to the frequency point and the playing program of the transmitting platform. The present invention can realize interregional automatic and smooth switch of networks and programs of a mobile stb.
Description
Technical field
The present invention relates to the roaming processing scheme of mobile digital TV, particularly the reception programme of the emission of mobile digital TV and roaming digital set-top box.
Background technology
In the epoch of Digital Television develop rapidly, the terrestrial wireless transfer of data becomes one of of paramount importance a kind of form in the network communication, must also have very big development.Present wireless transmission method mainly contains gsm (GSM) standard, Code Division Multiple Access communication system (CDMA) standard, 802.11g standard (a kind of up-to-date Wireless Networking standard) and DMB-T scheme.
The purpose of DMB-T scheme provides a kind of digital information transmission method, and the core of system has adopted time-domain synchronization OFDM (the TDS-OFDM:Time DomainSynchronous-Orthogonal Frequency Division Multiplexing) modulation technique of mQAM/QPSK; The forward error correction coding technology of system's exploitation of innovation; And hierarchical modulation and coding have been realized; Simultaneously can realize multimedia service.
Wherein the advantage of DMB-T is fairly obvious:
(1) cheapness, its cost may be 1/tens of other wireless transmission method;
(2) high bandwidth is existing more than several times even tens times of other wireless transmission method;
(3) long transmission distance, coverage is big.
(4) move reception.
Developing rapidly in the process of terrestrial DTV, the each place platform has all been set up the place operation of oneself, and the network and the program of emission all are not quite similar, and this objective having caused occurs the situation that can not frequency locking can not continue to play when receiving in that mobile set-top box is trans-regional.
Summary of the invention
The object of the present invention is to provide a kind of transregional loaming method that can search the mobile digital TV of frequency and frequency locking continuation broadcast.
Purpose of the present invention can realize like this, designs a kind of loaming method of mobile digital TV, comprises the method for reseptance of digital television signal launching technique and roaming digital set-top box;
Described digital television signal launching technique comprises: the digital television signal transmitting station is set respectively at least 2 zones; Described each regional digital television signal transmitting station is the unified network information data that send in digital-TV channel separately;
The method of reseptance of described roaming digital set-top box comprises: when the signal of current playing program interruption occurred or arrives the border, somewhere, set-top box was according to current address information and current transmitting station coded message, fuzzy query map datum and network information data; Then, search the current transmitting station signal of transmitting station on every side according to the data query result; After receiving the signal of one of transmitting station on every side, switch to the frequency of this transmitting station and play the program of this transmitting station.
The present invention can realize that mobile set-top box is trans-regional automatically, take over seamlessly network and program.Set-top box is being crossed over differently when regional, and all handover operations all carry out automatically on the backstage, all are sightless for the user, have save manual trouble.
Description of drawings
Fig. 1 is the information processing schematic diagram of roaming set-top box of the present invention.
The schematic diagram of launching tower and set-top box when Fig. 2 is of the present invention the roaming.
Embodiment
The invention will be further described below in conjunction with embodiment.
A kind of loaming method of mobile digital TV comprises the method for reseptance of digital television signal launching technique and roaming digital set-top box;
Described digital television signal launching technique comprises: the digital television signal transmitting station is set respectively at least 2 zones; Described each regional digital television signal transmitting station is the unified network information data that send in digital-TV channel separately;
The method of reseptance of described roaming digital set-top box comprises: when the signal of current playing program interruption occurs or arrives the border, somewhere, top box of digital machine is according to current address information and current transmitting station coded message, fuzzy query map datum and network information data; Then, search the current transmitting station signal of transmitting station on every side according to the data query result; After receiving the signal of one of transmitting station on every side, switch to the frequency of this transmitting station and play the program of this transmitting station, as shown in Figure 1.
The digital television signal transmitting station is provided with respectively in two zones at least, just the possibility that can roam thus.In most cases, guarantee the coverage rate of signal, 2 to 3 transmitting stations are set in each area usually at least; As in the urban district, being provided with one, transmitting station or the like is set respectively in each district or county.As shown in Figure 2, when F1 signal losing lock, set-top box receives the F2 signal with automatic redirect.
In the launching technique of described digital television signal, described each regional transmitting station comprises the unified program information data that sends in the information of each channel transmission of this TV station.In order to bring into play the advantage that allows the user utilize existing network, require each channel of each transmitting station to perform in a radio or TV programme programme signal unified network information data and the program information data of formulating of transmission simultaneously in addition normal the transmission; Although the program that each channel of each transmitting station is play is not quite similar, but the data such as identity information of each transmitting station all are unified the formulations in these network information data and program information data, the roaming set-top box can go to search automatic roaming according to these information that are provided with, and searches quickly frequently and frequency locking.
In the launching technique of described digital television signal, described each regional transmitting station unified each all network information packet in zone that send in digital-TV channel contains: the table of comparisons of transmitting station coding, local information, channel parameter information.
Can adopt several different methods to broadcast to network, program information data issues.
In the launching technique of described digital television signal, described network information data and program information data are unified to be sent; Wherein the transmission of network information data is by NIT or pmt table, and the transmission of program information data is by BAT, PAT or pmt table.Network and program information data unification issue.For example, network information data are by NIT, pmt table, and network information tables of data has comprised the relevant organizational information of TS/Multiplexes that transmits in the network, has also transmitted the physical features of network self simultaneously; And program information data is also issued, and for example, transmits programme information by BAT, PAT, PMT.
In the launching technique of described digital television signal, the unified transmission of described network information data and program information data adopted the private data table.
Comprise table code (table_id), segment length (section_length), network ID (network_id), frequency (frequency), network description length (network_descriptor_lenth), network description (descriptor) and check code data such as (CRC_32) in the tables of data of described network information data; Comprise table code (table_id), segment length (section_length), network ID (network_id), programm name (pgm_name), program PID (PCR_PID), program in the tables of data of described program information data and describe length (network_descriptor_lenth), network description (descriptor) and check code data such as (CRC_32).
The private data table can adopt following form.
Network information data format:
| Syntax | Value |
| table_id | To be allocated |
| section_length | |
| for(l＝0；l++；l＜N){ | |
| network_id | To be allocated |
| version_number | |
| frequency | |
| network_descriptor_lenth | |
| for(l＝0j；l＜N；l++){ | |
| descriptor() | |
| } | |
| CRC_32 |
Wherein:
● table code (Table_id): in order to distinguish other SI tables.
● segment length (section_length): privately owned table data length.
● network ID (network_id): mobile network identification number, the value of network_id are that the whole network is unique.
● version number (version_number):
● frequency (frequency): the frequency that corresponding network sends.
● network description length (network_descriptor_lenth);
● network description (descriptor);
● check code (CRC_32).
The program information data form
| Syntax | Value |
| table_id | To be allocated |
| section_length | |
| for(l＝0；l++；l＜N){ | |
| Pgm_id | |
| network_id | To be allocated |
| version_number | |
| Pgm_name | |
| PCR_PID |
| Pgm_descriptor_lenth | |
| for(l＝0j；l＜N；l++){ | |
| descriptor() | |
| } | |
| CRC_32 |
Wherein:
● table code (Table_id): in order to distinguish other SI tables;
● segment length (section_length): privately owned table data length;
● program ID Pgm_id): program identification number;
● network ID (network_id): belonging network identification number;
● version number (version_number):
● programm name (Pgm_name);
● program PID (PCR_PID);
● program is described length (network_descriptor_lenth);
● network description (descriptor);
● check code (CRC_32).
Network information data and the program information data mode by private data mode or regulation form is issued, standard the method for roaming digital TV, convenient, flexible.
The cartographic information data have dual mode to offer set-top box.The first: described cartographic information data are launched by transmitting station, and mobile set-top box receives, and is stored in the memory of set-top box.It two is: described cartographic information data are in the memory that is stored in advance in the set-top box.
The roaming digital radiovisor comprises mobile set-top box, antenna and display screen.Display screen adopts liquid crystal display screen usually.Mobile set-top box comprises tuner, demodulation chip, main decoder chip, video decode module, video amplification module, audio decoder module, audio frequency amplification module and memory.
When the roaming digital set-top box is trans-regional, current demand signal will occur interrupts, set-top box is carried out the processing of data fuzzy query according to cartographic information data of having stored in current address information data that store in the memory or input and former current transmitting station coding information data that receives and the machine and channel information table data by processor, automatically search the current transmitting station signal of transmitting station on every side according to the data of fuzzy query result then, after receiving the signal of one of transmitting station on every side, and automatic switchover frequency, the program of frequency locking and this transmitting station of broadcast, and provide multiple mode to switch.
Described across a network broadcast program is the direct redirect of same program; Different programs are sought default program or are selected at random.The program of two transmitting stations is identical, and set-top box is carried out direct redirect with regard to directly switching frequency.The program of two transmitting stations is different, can adopt the broadcast default program, as the program or the like of the 1st channel of back one transmitting station; It perhaps is exactly the program of a transmitting station after the shuffle.
Set-top box is being crossed over differently when regional, and all handover operations all carry out automatically on the backstage, all are sightless for the user, have save manual trouble.
Above-mentioned mobile digital TV loaming method is implemented, and can be applicable to equally also can be applicable in DMB-H, DVB-T, the DVB-H system in the network of DMB-T and in the DMB-T roaming set-top box.
Claims (9)
1. the loaming method of a mobile digital TV is characterized in that: the method for reseptance that comprises digital television signal launching technique and roaming digital set-top box;
Described digital television signal launching technique comprises: the digital television signal transmitting station is set respectively at least 2 zones; Described each regional digital television signal transmitting station is the unified network information data that send in digital-TV channel separately;
The method of reseptance of described roaming digital set-top box comprises: when the signal of current playing program interruption occurred or arrives the border, somewhere, set-top box was according to current address information and current transmitting station coded message, fuzzy query map datum and network information data; Then, search the current transmitting station signal of transmitting station on every side according to the data query result; After receiving the signal of one of transmitting station on every side, switch to the frequency of this transmitting station and play the program of this transmitting station.
2. the loaming method of mobile digital TV according to claim 1 is characterized in that: in the described digital television signal launching technique, described each regional transmitting station comprises the unified program information data that sends in each channel transmission information of this TV station.
3. the loaming method of mobile digital TV according to claim 1, it is characterized in that: in the described digital television signal launching technique, each regional transmitting station unified each all network information packet in zone that send in digital-TV channel contains: the table of comparisons of transmitting station coding, local information, channel parameter information.
4. the loaming method of mobile digital TV according to claim 1, it is characterized in that: in the described roaming digital set-top box method of reseptance, the across a network broadcast program is the direct redirect of same program; Different programs are sought default program or are selected at random.
5. the loaming method of mobile digital TV according to claim 2 is characterized in that: in the described digital television signal launching technique, network information data and program information data are unified to be sent; Wherein the transmission of network information data is by NIT or pmt table, and the transmission of program information data is by BAT, PAT or pmt table.
6. the loaming method of mobile digital TV according to claim 2 is characterized in that: in the described digital television signal launching technique, the unified transmission of network information data and program information data adopted the private data table.
7. the loaming method of mobile digital TV according to claim 6 is characterized in that: the data that comprise table code (table_id), segment length (section_length), network ID (network_id), frequency (frequency), network description length (network_descriptor_lenth), network description (descriptor) and check code (CRC_32) in the tables of data of described network information data; Comprise table code (table_id), segment length (section_length), network ID (network_id), programm name (pgm_name), program PID (PCR_PID), program in the tables of data of described program information data and describe the data of length (network_descriptor_lenth), network description (descriptor) and check code (CRC_32).
8. the loaming method of mobile digital TV according to claim 1, it is characterized in that: described map datum is launched by transmitting station, and mobile set-top box receives.
9. the loaming method of mobile digital TV according to claim 1, it is characterized in that: described map datum is to be stored in the set-top box in advance.
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| CNB2005101001322A CN100394783C (en) | 2005-09-28 | 2005-09-28 | Roaming method of mobile digital TV. |
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| CNB2005101001322A CN100394783C (en) | 2005-09-28 | 2005-09-28 | Roaming method of mobile digital TV. |
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| CN100394783C true CN100394783C (en) | 2008-06-11 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100574230C (en) * | 2006-08-30 | 2009-12-23 | 鸿富锦精密工业（深圳）有限公司 | Remote control, wireless family network system and automatic switch broadcasting method |
| CN100448264C (en) * | 2006-11-08 | 2008-12-31 | 常德广达广播电视宽带网络有限公司 | Method for quick writing channel information into cable digital TV set-top box |
| CN101600085B (en) * | 2008-06-06 | 2012-05-23 | Tcl集团股份有限公司 | Management method of mobile digital television |
| CN101668191B (en) * | 2008-09-02 | 2011-02-09 | 中广电信有限公司 | Method and system for receiving digital broadcast signal by high-speed running train |
| CN101677395B (en) * | 2008-09-18 | 2012-08-22 | 华为技术有限公司 | Method, system and equipment for realizing video-on-demand service |
| CN102164260B (en) * | 2011-02-18 | 2013-07-31 | 宇龙计算机通信科技(深圳)有限公司 | Method and device for tracking mobile television channel |
| CN103856805A (en) * | 2012-11-28 | 2014-06-11 | 上海聚音信息科技有限公司 | Cross-time-zone program list transition method |
| CN102946555B (en) * | 2012-11-28 | 2019-01-29 | 康佳集团股份有限公司 | A kind of control method and system of directional reception data broadcast service |
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