CN103236880A - Satellite digital distribution system and satellite digital distribution method - Google Patents
Satellite digital distribution system and satellite digital distribution method Download PDFInfo
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- CN103236880A CN103236880A CN2013101344007A CN201310134400A CN103236880A CN 103236880 A CN103236880 A CN 103236880A CN 2013101344007 A CN2013101344007 A CN 2013101344007A CN 201310134400 A CN201310134400 A CN 201310134400A CN 103236880 A CN103236880 A CN 103236880A
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Abstract
The invention discloses a satellite digital distribution system and a satellite digital distribution method. The satellite digital distribution system comprises a satellite head end and at least one local area network; the satellite head end is used for transmitting modulated digital multimedia data; each local area network comprises a node server and at least one user terminal; each node server is connected with the satellite head end by a satellite link and comprises a satellite receiving antenna, a data processing unit and a memory, the satellite receiving antenna is used for receiving the modulated digital multimedia data, the data processing unit is used for processing the modulated digital multimedia data, and the memory stores processed digital multimedia data; and the user terminals are connected with the node servers via the local area networks and can directly acquire the processed digital multimedia data from the node servers. The satellite digital distribution system and the satellite digital distribution method are used for transmitting the digital media data from the satellite head end to user terminals.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of satellite digital publishing system and method.
Background technology
Existingly utilize satellite digital publishing system that satellite comes the transmitting digital media data as shown in fig. 1, comprise the satellite head end 10 for the emission digital media data, and at least one is for the user terminal that receives described digital media data, as exemplarily showing two user terminals 30 and 40 among Fig. 1.Between satellite head end 10 and user terminal 30 and 40 via satellite link 20 be connected, like this satellite head end 10 just can be with the digital media data real time propelling movement to each user terminal.Utilize the characteristics that the satellite system overlay area is wide, communication mode is many, can realize at a distance, transmit data on a large scale, and not be subjected to the restriction of time place and meteorological condition, therefore be with a wide range of applications.But because the satellite repeater lease cost is higher, cost also can raise accordingly when causing adopting satellite to push a large amount of digital media datas.
Simultaneously, the satellite head end just can send after need processing such as modulating to armed digital media data, hardware device such as corresponding demodulator so just need be set just can offer user's use after the digital media data that receives is handled at user terminal.This will cause the manufacturing cost of user terminal also can raise.
In sum, utilize satellite to transmit a large amount of digital media datas, will face expensive problem.
Summary of the invention
The invention provides a kind of satellite digital publishing system and method, be used for digital media data is sent to user terminal from the satellite head end, utilize satellite communication to carry out the too high problem of cost of transfer of data with solution.
Described satellite digital publishing system comprises:
The satellite head end is used for the modulated digital media data of emission;
At least one LAN, each LAN in described at least one LAN comprises:
With a described satellite head end link-attached node server via satellite; Described node server comprises for the satellite earth antenna that receives described modulated digital media data, described modulated digital media data is carried out the data processing unit that data handle and stores the memory of the described digital media data of handling through data;
At least one user terminal, it is connected with described node server by described LAN, directly to obtain the described digital media data of handling through data from described node server.Wherein, described local area network (LAN) can be Ethernet.
Preferably, described satellite head end is arranged in the satellite idle periods and sends described digital media data.
Particularly, described node server is pushed to described user terminal with the described digital media data of handling through data.Perhaps, described user terminal is initiatively visited described node server and is downloaded the described digital media data of handling through data.
Particularly, described data processing unit comprises at least: modulator-demodulator, and in order to described digital media data is carried out demodulation.Further, can also comprise one or more in following:
The high-frequency/low-frequency signal converter is in order to be converted to low frequency signal with described digital media data from high-frequency signal;
The analog/digital signal conversion device is in order to being digital signal with described digital media data from analog signal conversion;
Demodulation multiplexer is in order to carry out demultiplexing to described digital media data; With
The PID filter filters in order to described digital media data is carried out PID.
Described satellite digital distributing method comprises:
By the digital media data after the satellite head end link transmission via satellite modulation;
Receive described digital media data by the node server in the LAN, and described digital media data is carried out storing after data are handled;
Directly obtain the described digital media data of handling through data from described node server with described node server by at least one user terminal that described LAN is connected.Wherein, described LAN is specifically as follows Ethernet.
Particularly, described node server is pushed to described user terminal with the described digital media data of handling through data.Perhaps, described user terminal is initiatively visited described node server and is downloaded the described digital media data of handling through data.
Particularly, described data are handled and are comprised at least described modulated digital media data is carried out demodulation process.Further, can also comprise one or more in following: high-frequency/low-frequency signal conversion processes, analog/digital signal conversion are handled, demultiplexing is handled and the PID filtration treatment.
Utilize satellite digital publishing system provided by the invention and method, can and carry out at node server termination receipts digital media data storing after data necessary is handled, user terminal directly can be connected to obtain digital media data after the described processing by local area network (LAN) with described node server like this, and need not satellite earth antenna to be set and to carry out the necessaries that described data are handled at each user terminal, thereby can reduce the user terminal cost.In addition, each node server can be connected with a plurality of user terminals, be transferred to each user terminal than digital media data that directly will be to be issued from the satellite head end, and from the satellite head end described digital media data is transferred to node server, can reduce and utilize the satellite link data quantity transmitted, thereby reach the purpose of saving cost.Further, owing to can described digital media data be stored at the node server end, from the satellite head end described digital media data is transferred to the time of node server like this, the time of obtaining described digital media data with user terminal just can be asynchronous, utilize the time that satellite link transmits described digital media data to go up just unrestricted, thereby can utilize the free time of satellite link to transmit data, saving cost further.
Description of drawings
Figure 1 shows that the structural representation of existing satellite digital publishing system;
Figure 2 shows that the structural representation of the satellite digital publishing system that one embodiment of the invention provides;
Figure 3 shows that the node server structural representation shown in Fig. 2;
Figure 4 shows that the schematic flow sheet of the satellite digital distributing method that another embodiment of the present invention provides.
Embodiment
Describe the present invention below in conjunction with drawings and the specific embodiments.
The invention provides a kind of satellite digital publishing system, with digital media data from the satellite head end via satellite link transmission carry out that data are handled and preserve to node server, user terminal can directly obtain data by local area network (LAN) from node server like this.Than each user terminal directly via satellite link obtain data from the satellite head end, reduced the data volume of link transmission via satellite, thereby can save cost.
As a preferred embodiment of the present invention, in the satellite digital publishing system as shown in Figure 2, satellite head end 100 is launched modulated digital media data, and link 200 is transmitted at least one local area network (LAN) via satellite.Exemplary two local area network (LAN)s 501 and 502 of showing among Fig. 2.Comprise node server 201 and four user terminals 301～304 that exemplarily illustrate in the local area network (LAN) 501.Similarly, comprise node server 202 and four user terminals 305～308 that exemplarily illustrate in the local area network (LAN) 502.Be appreciated that in this satellite digital publishing system also can comprise more or less local area network (LAN), in each local area network (LAN), also can comprise more or less user terminal.
Each node server 201 and 202 can be as shown in Figure 3, comprise for the satellite earth antenna 401 that receives described modulated digital media data, described modulated digital media data is carried out the data processing unit 402 that data handle and stores the memory 403 of the described digital media data of handling through data.Each user terminal all can be connected to obtain the described digital media data of handling through data by the local area network (LAN) at its place with described node server in this local area network (LAN).Wherein, described digital media data can be music, books, newpapers and periodicals, magazine, courseware or recreation.Described digital media data is can directly described digital media data be shown to user's data after described user terminal obtains.
Particularly, described node server can be pushed to each user terminal with described digital media data multicast.Certainly, user terminal also can obtain described digital media data by initiatively visiting described node server.
Because described digital media data is not directly to be pushed to user terminal by the satellite head end, but receive and preserve by node server, the satellite head end transmits the time of described digital media data like this, and the time of obtaining described digital media data with described user terminal is can be nonsynchronous.Satellite head end 100 can utilize satellite link 200 idle periods to transmit data on the node server 201,202 to preserve like this, and the lease cost that can save satellite repeater also can improve high utilization of satellite on the other hand on the one hand.Described idle periods is the time period that the channel of satellite link 200 is in relative idle condition.
Because in the satellite communication process, need be in 100 pairs of various complex process of described digital media datas process of satellite head end so that it can adapt to the satellite communication mode, transmission needs satellite earth antenna to receive afterwards through satellite, and further needs other hardware devices that described digital media data is carried out the digital media data that corresponding data processing could obtain to adapt to described user terminal.By data reception antenna 401 and data processing unit 402 being set finishing receiving course and described data handling procedure on the described node server, and then obtain to adapt to the digital media data of user terminal in the present embodiment.Than at each user terminal satellite earth antenna and data processing unit being set, the mode that provides in the present embodiment can be simplified the hardware device of user terminal, reduces the user terminal cost of manufacture.
In one embodiment, described data processing unit 402 can comprise:
Modulator-demodulator is used for described modulated digital media data is carried out demodulation process;
The high-frequency/low-frequency signal converter is in order to be converted to low frequency signal with described digital media data from high-frequency signal;
The analog/digital signal conversion device is in order to being digital signal with described digital media data from analog signal conversion;
Demodulation multiplexer is in order to carry out demultiplexing to described digital media data; With
The PID filter filters in order to described digital media data is carried out PID.
In another embodiment, this data processing unit 402 also can include only above-mentioned every part of listing.In another embodiment, described data processing unit 402 can also comprise the hardware device that carries out other processing for to described modulated digital media data, meets the final data of user terminal demand with acquisition, thereby simplifies the hardware device of user terminal.Here it will be appreciated that the hardware device for the data processing unit 402 at node server comprises then can save in corresponding user terminal.
Described user terminal 301～308 is specifically as follows set-top box, computer or smart mobile phone, and those skilled in the art are easy to understand that described user terminal is not restricted to only be the said equipment.
A kind of satellite digital distributing method that provides for another embodiment of the present invention as shown in Figure 4 comprises:
Step 11, by the satellite head end via satellite link send modulated digital media data;
Step 12 receives described modulated digital media data by the node server in the LAN, and described modulated digital media data is carried out storing after data are handled;
Step 13 is directly obtained the described digital media data of handling through data from described node server with described node server by at least one user terminal that described LAN is connected.
Wherein, described user terminal can initiatively obtain the described digital media data of handling through data from described node server.Perhaps, described node server is pushed to described user terminal with the described digital media data multicast of handling through data, to adapt to different local area network (LAN) bandwidth.
Described LAN is preferably Ethernet.
Described data handling procedure comprises: described modulated digital media data is carried out demodulation process, high-frequency/low-frequency signal conversion processes, analog/digital signal conversion processing, demultiplexing processing and PID filtration treatment, in order to make the described digital media data after data are handled to meet the user terminal demand, thereby simplify the processing procedure of user terminal.Certainly, those skilled in the art should know that above-mentioned data procedures is not limited to this, can adjust described data handling procedure according to the actual requirements.
Above embodiment only is used for explanation technical scheme of the present invention, is not limited to protection scope of the present invention.The modification that those skilled in the art can carry out technical scheme of the present invention or equal the replacement, and do not break away from the spirit and scope of technical solution of the present invention.
Claims (13)
1. a satellite digital publishing system is used for digital media data is sent to user terminal from the satellite head end, and described satellite digital publishing system comprises:
The satellite head end is used for the modulated digital media data of emission;
At least one LAN, each LAN in described at least one LAN comprises:
With a described satellite head end link-attached node server via satellite; Described node server comprises for the satellite earth antenna that receives described modulated digital media data, described modulated digital media data is carried out the data processing unit that data handle and stores the memory of the described digital media data of handling through data;
At least one user terminal, it is connected with described node server by described LAN, directly to obtain the digital media data of handling through data from described node server.
2. satellite digital publishing system according to claim 1 is characterized in that, described satellite head end is arranged in the satellite idle periods and sends described digital media data.
3. satellite digital publishing system according to claim 1 and 2 is characterized in that, described node server is pushed to described user terminal with the described digital media data of handling through data.
4. satellite digital publishing system according to claim 1 and 2 is characterized in that, described user terminal is initiatively visited described node server and downloaded the described digital media data of handling through data.
5. satellite digital publishing system according to claim 2 is characterized in that, described data processing unit comprises:
Modulator-demodulator is in order to carry out demodulation to described digital media data.
6. satellite digital publishing system according to claim 5 is characterized in that, described data processing unit also comprises one or more in following:
The high-frequency/low-frequency signal converter is in order to be converted to low frequency signal with described digital media data from high-frequency signal;
The analog/digital signal conversion device is in order to being digital signal with described digital media data from analog signal conversion;
Demodulation multiplexer is in order to carry out demultiplexing to described digital media data; With
The PID filter filters in order to described digital media data is carried out PID.
7. according to the arbitrary described satellite digital publishing system of claim 1-6, it is characterized in that described local area network (LAN) is Ethernet.
8. satellite digital distributing method comprises:
By the digital media data after the satellite head end link transmission via satellite modulation;
Receive described digital media data by the node server in the LAN, and described digital media data is carried out storing after data are handled;
Directly obtain the described digital media data of handling through data from described node server with described node server by at least one user terminal that described LAN is connected.
9. satellite digital distributing method according to claim 8 is characterized in that, described node server is pushed to described user terminal with the described digital media data of handling through data.
10. satellite digital distributing method according to claim 8 is characterized in that, described user terminal is initiatively visited described node server and downloaded the described digital media data of handling through data.
11. arbitrary described satellite digital distributing method is characterized in that according to Claim 8-10, described data processing comprises at least carries out demodulation process to described modulated digital media data.
12. satellite digital distributing method according to claim 11, it is characterized in that described data are handled and also comprised one or more in following: high-frequency/low-frequency signal conversion processes, analog/digital signal conversion are handled, demultiplexing is handled and the PID filtration treatment.
13. satellite digital distributing method according to claim 12 is characterized in that, described local area network (LAN) is Ethernet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310134400.7A CN103236880B (en) | 2013-04-18 | 2013-04-18 | A kind of satellite digital publishing system and method |
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| CN201310134400.7A CN103236880B (en) | 2013-04-18 | 2013-04-18 | A kind of satellite digital publishing system and method |
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| CN103236880B CN103236880B (en) | 2016-08-10 |
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| CN103763018A (en) * | 2014-01-17 | 2014-04-30 | 航天数字传媒有限公司 | Data receiving method for user terminal of satellite |
| CN104539633A (en) * | 2015-01-21 | 2015-04-22 | 冯山泉 | Large multimedia file content receiving method and system |
| CN105049415A (en) * | 2015-06-09 | 2015-11-11 | 上海文广科技（集团）有限公司 | Method and system for remotely transmitting data through satellite |
| CN106059654A (en) * | 2016-08-04 | 2016-10-26 | 深圳市华讯星通讯有限公司 | Wireless communication method and device for terminal |
| WO2018023526A1 (en) * | 2016-08-04 | 2018-02-08 | 深圳市华讯星通讯有限公司 | Wireless communication method for terminal, and terminal |
| CN113452431A (en) * | 2021-06-25 | 2021-09-28 | 亚太卫星宽带通信（深圳）有限公司 | Method for optimizing satellite network data service by utilizing edge computing technology |
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| CN106059654A (en) * | 2016-08-04 | 2016-10-26 | 深圳市华讯星通讯有限公司 | Wireless communication method and device for terminal |
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| CN113452431A (en) * | 2021-06-25 | 2021-09-28 | 亚太卫星宽带通信（深圳）有限公司 | Method for optimizing satellite network data service by utilizing edge computing technology |
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| CN103236880B (en) | 2016-08-10 |
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