1. Introduction to HDCP
HDCP (High-bandwidth Digital Content ProtecTIon): High-bandwidth digital content protection technology. The era of HDTV (High Definition Television) is approaching. In order to adapt to the high bandwidth of HDTV, HDMI has appeared. HDMI is a high-definition digital interface standard, it can provide a high bandwidth, lossless transmission of digital video and audio signals. In order to ensure that the high-definition signals transmitted by HDMI or DVI will not be illegally recorded, HDCP technology has emerged. The HDCP technical specification is led by Intel. When users make illegal copies, the technology will interfere and reduce the quality of the copied images, thereby protecting the content.
2. HDCP foreground
Frankly speaking, although HDCP has received widespread attention in the industry and its popularization is a foregone conclusion, from the perspective of HDCP principles, the protection process is too simple, and protection is only achieved in the external transmission process. This is quite limited in the era when computers are widely used. , This not only makes people feel that the makers are suspected of defrauding high licensing fees. And once the digital signal itself is read into the computer in a binary format, the copy process can still be realized, and the RIP method similar to DVD video discs can be used for separation.
3. What are the functions of HDCP
HDCP protects the video signal from beginning to end, which means that every link in the entire playback system must support the HDCP protocol. If the monitor does not support the HDCP protocol, then the HD program cannot be played normally, and only a black screen or low image quality can be seen in the show.
4. Basic principles of HDCP
1) Basic principles of HDCP
HDCP (High-bandwidth Digital Content ProtecTIon Broadband Digital Video Protection) is used to protect the transmission of HDMI-enabled transmitters and HDMI-enabled receivers. In order to protect copyrights, it is also used in the motion image industry (such as FOX, Universal, Warner Bros, etc.). It is based on HDMI, which transmits high-speed, high-bandwidth digital content protection. Other anti-copy technologies are not suitable for HDMI. For example, Macrovision is only suitable for analog signals, and DCTP only supports 100~400M bandwidth and only adapts to IEEE-1394.
To obtain this technology and produce HDCP-enabled products, you must obtain a license from Digital Content ProtecTIon LLC to obtain the device key required by HDCP. It is unique, one key per device.
The payment status of Licence is as follows:
You must first get HDCP confirmation (AuthenTIcation) before HDMI data transmission can be carried out. The process is as follows:
When the transmitter and receiver obtain a valid device key from Digital Content Protection LLC, there will be a corresponding Identifier (KSV) (Key Selection Vector).
(1) Confirm initialization, the HDCP crypto engine of transmitter A generates a 64-bit pseudo-random sequence An, together with its own
KSV (Aksv), transmitted to the receiving end, and the receiving end transmits its own KSV (Bksv) and REPEATER bit to the transmitting end to respond.
(2) The transmitting end uses Akey and Bksv to perform an algorithm to obtain Km, and then obtain Ks, Mo, R0 from Km, REPEATER, and An,
Similarly, the receiving end uses Bkey and Aksv to perform an algorithm to get Km', and then Km, REPEATER, and An get Ks', Mo', and Ro'.
(3) When R0 = R0', the initial confirmation of HDCP is passed.
Hdcp function and principle introduction
(4) After the field blanking period, starting from the 128th frame, every 2 seconds, Mi (initial value, I think it is equivalent to the previous An)
changes to a new value to calculate new Ri and Ri’, which means that Ri and Ri’ will be upgraded every 2 seconds. 5. When Ri = Ri’, the HDCP confirmation is passed, and the HDMI connection is continued.
2) Working principle of HDMI+HDCP+HPD+EDID
(1) HPD
(Hot Plug Detect) is a method to detect whether the receiving end is connected, regardless of whether the receiving end is powered on.
(2) EDID
When it is detected that the receiving end is connected, the EDID information is read from the EEPROM of the receiving end. EDID (Extended display Identification Data) is the display format of the monitor stored in the EEPROM of the receiving end, and the transmitting end (PC host) needs to be read EDID information to determine the output format.
(3) Confirmation of HD CP
① Check whether the receiving end is powered on
② Establish HDMI connection
③ Confirmation of HDCP
④ Retry three times
(4) HDMI data transmission and TMDS decoding.
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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
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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
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Pay by Western Union to me :
First name/Given name: Yingfeng
Last name/Surname/ Family name: Zhang
Full name: Yingfeng Zhang
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City: Guangzhou
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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
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Second BANK INFORMATION (COMPANY ACCOUNT):
Beneficiary: Fmuser International Group Inc
Account Number: 44050158090900000337
Beneficiary's Bank: China Construction Bank Guangdong Branch
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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.
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* It will be sent in 1-2 working days when payment clear.
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* 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.
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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.
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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: |
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