Another key technology for IPTV on cable TV networks is called CDN, which means that content distribution networks are a strategy. Based on what considerations? The cable TV network is basically a hybrid network. The backbone uses an optical fiber network, and there are various ways to connect to the user. Now, the cable is mainly used to connect to the user. If IPTV services are launched on this network, there are several bottlenecks. One is the bottleneck of the server. The capacity of the server itself is limited. It is already a good server to support hundreds of streams to thousands of streams. But if a large deployment is watched by tens of thousands of users, and it is impossible to realize it on one machine, what should we do? Generally speaking, the method of clustering is adopted to expand the servers, and the servers are assembled in a cluster. Another bottleneck is the network, installed to the home, tens of millions or tens of thousands of users are watching at the same time, the bandwidth is very wide, and the network bandwidth is very large, so the CDN content distribution method is mainly used in the core edge method, the server In the way of distribution, all programs are stored in the central core station, and the content is distributed to the edge websites through the backbone network of the radio and television, and the edge websites are basically close to the users. In the community, the fiber optic point, in fact, the user’s service, Service directly by the edge router relieves the pressure on the bandwidth of the backbone network, but what problem does this bring? We need a strategy for how to distribute the content to the edge streaming server.
Now a new technology has emerged, using a more advanced method, using high-performance streaming media servers at the front end. Of course, the price is relatively high, the performance is relatively high, and it can serve thousands or tens of thousands of users at the same time. The network delivers programs directly to users, but only an edge band is used for management in the edge community, which requires a very high backbone network, reaching above 10G. This method has a great advantage. For users, the networking is very simple. And like the previous method, there is a problem. As the number of users increases, there will be more and more edge servers. For operators, the cost of managing these edge servers is very high.
IPTV programs, electronic program guides generally use HTML, which are transmitted to the set-top box through the IT network, and the set-top box is displayed with a built-in browser, allowing mutual cooperation. The use of IP systems in the CATV system of radio and television also requires back-end technology, which is the back-end support, mainly including billing, digital rights management, and user management services. The billing in this way is very flexible. It can be based on the media type, time period, and people to visit. The billing group can be monthly subscription, pay-per-use, and so on. Backstage management and related technology is digital copyright technology. The scheme used in DVB-C cable TV is called CA technology, which performs user management and authorization authentication, but IPTV mainly uses authentication technology and digital rights management methods to authenticate users' copyrights.
The realization of digital copyright mainly uses digital encryption technology, and higher watermark technology to protect the copyright of streaming media, and it is a point-to-point security mechanism that can realize information authentication, anti-denial, and intrusion behavior Respond to achieve the goal of safety.
To realize IPTV in the cable TV network, another technology is access technology. The radio and television access technology is currently undergoing two-way transformation, mainly using the cat technology. But there are also some technologies that use Category 5 cables. There is also ADLS technology, and even wireless broadband, the recent development is very fast, the technology has reached 100 megabytes. In addition, there are some access technologies, but they are all non-mainstream.
Another technology is the set-top box, directly to the user. To realize IPTV technology in the field of cable TV, first of all, the way cable TV is now spread is MPEG-2. If IPTV is implemented, the decoding also needs to monitor PMEG-4 in real time. There are several aspects to the technology, including hardware compression. Hardware for MPEG-4, will be launched by the end of the year or next year. The current implementation method is mainly soft decompression technology, and the decompressed program is counted as DSP technology.
There are some resources that can be used directly for IPTV services in cable TV. Cable TV already has some management interfaces, such as the user management interface SMS and settlement interfaces. There is also an interface for supervision. The supervised interface is the need of the radio and television industry, and there must be a supervised interface for the safety of programs.
To realize the IPTV system, there is no need to establish a set of user interface and settlement interface by yourself, and you can directly use the existing interface of the cable TV to reduce the investment of the operator.
Of course, if these interfaces are to be used directly, it is necessary to define the interface technology and standardize the interface.
The Internet Research Institute has mainly carried out several researches, hoping to cooperate with a large number of equipment manufacturers and radio and television operators to promote the development of IPTV in the radio and television industry and promote the transition of cable television from analog technology to digital technology.
|
|
|
|
How far(long) the transmitter cover?
The transmission range depends on many factors. The true distance is based on the antenna installing height , antenna gain, using environment like building and other obstructions , sensitivity of the receiver, antenna of the receiver . Installing antenna more high and using in the countryside , the distance will much more far.
EXAMPLE 5W FM Transmitter use in the city and hometown:
I have a USA customer use 5W fm transmitter with GP antenna in his hometown ,and he test it with a car, it cover 10km(6.21mile).
I test the 5W fm transmitter with GP antenna in my hometown ,it cover about 2km(1.24mile).
I test the 5W fm transmitter with GP antenna in Guangzhou city ,it cover about only 300meter(984ft).
Below are the approximate range of different power FM Transmitters. ( The range is diameter )
0.1W ~ 5W FM Transmitter ：100M ~1KM
5W ~15W FM Ttransmitter : 1KM ~ 3KM
15W ~ 80W FM Transmitter : 3KM ~10KM
80W ~500W FM Transmitter : 10KM ~30KM
500W ~1000W FM Transmitter : 30KM ~ 50KM
1KW ~ 2KW FM Transmitter : 50KM ~100KM
2KW ~5KW FM Transmitter : 100KM ~150KM
5KW ~10KW FM Transmitter : 150KM ~200KM
How to contact us for the transmitter?
Call me +8618078869184 OR
Email me [email protected]
1.How far you want to cover in diameter ?
2.How tall of you tower ?
3.Where are you from ?
And we will give you more professional advice.
About Us
FMUSER.ORG is a system integration company focusing on RF wireless transmission / studio video audio equipment / streaming and data processing .We are providing everything from advice and consultancy through rack integration to installation, commissioning and training.
We offer FM Transmitter, Analog TV Transmitter, Digital TV transmitter, VHF UHF Transmitter, Antennas, Coaxial Cable Connectors, STL, On Air Processing, Broadcast Products for the Studio, RF Signal Monitoring, RDS Encoders, Audio Processors and Remote Site Control Units, IPTV Products, Video / Audio Encoder / Decoder, designed to meet the needs of both large international broadcast networks and small private stations alike.
Our solution has FM Radio Station / Analog TV Station / Digital TV Station / Audio Video Studio Equipment / Studio Transmitter Link / Transmitter Telemetry System / Hotel TV System / IPTV Live Broadcasting / Streaming Live Broadcast / Video Conference / CATV Broadcasting system.
We are using advanced technology products for all the systems, because we know the high reliability and high performance are so important for the system and solution . At the same time we also have to make sure our products system with a very reasonable price.
We have customers of public and commercial broadcasters, telecom operators and regulation authorities , and we also offer solution and products to many hundreds of smaller, local and community broadcasters .
FMUSER.ORG has been exporting more than 15 years and have clients all over the world. With 13 years experience in this field ,we have a professional team to solve customer's all kinds of problems. We dedicated in supplying the extremely reasonable pricing of professional products & services. Contact email : [email protected]
Our Factory
We have modernization of the factory . You are welcome to visit our factory when you come to China.
At present , there are already 1095 customers around the world visited our Guangzhou Tianhe office . If you come to China , you are welcome to visit us .
At Fair
This is our participation in 2012 Global Sources Hong Kong Electronics Fair . Customers from all over the world finally have a chance to get together.
Where is Fmuser ?
You can search this numbers " 23.127460034623816,113.33224654197693 " in google map , then you can find our fmuser office .
FMUSER Guangzhou office is in Tianhe District which is the center of the Canton . Very near to the Canton Fair , guangzhou railway station, xiaobei road and dashatou , only need 10 minutes if take TAXI . Welcome friends around the world to visit and negotiate .
Contact: Sky Blue
Cellphone: +8618078869184
WhatsApp: +8618078869184
Wechat: +8618078869184
E-mail: [email protected]
QQ: 727926717
Skype: sky198710021
Address: No.305 Room HuiLan Building No.273 Huanpu Road Guangzhou China Zip:510620
|
|
|
|
English: We accept all payments , such as PayPal, Credit Card, Western Union, Alipay, Money Bookers, T/T, LC, DP, DA, OA, Payoneer, If you have any question , please contact me [email protected] or WhatsApp +8618078869184
-
PayPal.  www.paypal.com
We recommend you use Paypal to buy our items ,The Paypal is a secure way to buy on internet .
Every of our item list page bottom on top have a paypal logo to pay.
Credit Card.If you do not have paypal,but you have credit card,you also can click the Yellow PayPal button to pay with your credit card.
---------------------------------------------------------------------
But if you have not a credit card and not have a paypal account or difficult to got a paypal accout ,You can use the following:
Western Union.  www.westernunion.com
Pay by Western Union to me :
First name/Given name: Yingfeng
Last name/Surname/ Family name: Zhang
Full name: Yingfeng Zhang
Country: China
City: Guangzhou
|
---------------------------------------------------------------------
T/T . Pay by T/T (wire transfer/ Telegraphic Transfer/ Bank Transfer)
First BANK INFORMATION (COMPANY ACCOUNT):
SWIFT BIC: BKCHHKHHXXX
Bank name: BANK OF CHINA (HONG KONG) LIMITED, HONG KONG
Bank Address: BANK OF CHINA TOWER, 1 GARDEN ROAD, CENTRAL, HONG KONG
BANK CODE: 012
Account Name : FMUSER INTERNATIONAL GROUP LIMITED
Account NO. : 012-676-2-007855-0
---------------------------------------------------------------------
Second BANK INFORMATION (COMPANY ACCOUNT):
Beneficiary: Fmuser International Group Inc
Account Number: 44050158090900000337
Beneficiary's Bank: China Construction Bank Guangdong Branch
SWIFT Code: PCBCCNBJGDX
Address: NO.553 Tianhe Road, Guangzhou, Guangdong,Tianhe District, China
**Note: When you transfer money to our bank account, please DO NOT write anything in the remark area, otherwise we won't be able to receive the payment due to government policy on international trade business.
|
|
|
|
* It will be sent in 1-2 working days when payment clear.
* We will send it to your paypal address. If you want to change address, please send your correct address and phone number to my email [email protected]
* If the packages is below 2kg,we will be shipped via post airmail, it will take about 15-25days to your hand.
If the package is more than 2kg,we will ship via EMS , DHL , UPS, Fedex fast express delivery,it will take about 7~15days to your hand.
If the package more than 100kg , we will send via DHL or air freight. It will take about 3~7days to your hand.
All the packages are form China guangzhou.
* Package will be sent as a "gift" and declear as less as possible,buyer don't need to pay for "TAX".
* After ship, we will send you an E-mail and give you the tracking number.
|
|
|
For Warranty .
Contact US--->>Return the item to us--->>Receive and send another replace .
Name: Liu xiaoxia
Address: 305Fang HuiLanGe HuangPuDaDaoXi 273Hao TianHeQu Guangzhou China.
ZIP:510620
Phone: +8618078869184
Please return to this address and write your paypal address,name,problem on note: |
|
