480x320, 640x480 SD
1024x720p HD
1920x1080i (interlaced scan) also belongs to HD
1920x1080p Full HD
3840x2160, 7680x4320 Ultra (High) Definition
The Consumer Electronics Association of America (CEA) officially named the 4K resolution as Ultra HD (Ultra High-Definition)
The current video resolution specifications in the video industry:
(1) High Definition (High Definition) is a term that we are relatively familiar with. HD was first proposed in the field of radio and television, and related standards were first formulated by authoritative organizations such as the Society of Motion Picture and Television Engineers (SMPTE). In the field of video surveillance, radio and television standards were also widely used. "HD" is defined as three standard forms of 720p, 1080i and 1080p, and 1080P has another name-Full High Definition. Regarding the high-definition standards, there are two internationally recognized: the vertical video resolution exceeds 720p or 1080i; the video aspect ratio is 16:9.
(2) Standard Definition is a video format with a physical resolution below 720p.
(3) Ultra High-Definition, which is our focus today. According to the latest information approved by the International Telecommunication Union, the official name of "4K resolution (3840×2160 pixels)" has been designated as "Ultra High-Definition (Ultra High-Definition)". At the same time, this name also applies to "8K resolution (7680×4320 pixels)".
CEA requires that all consumer-level monitors and televisions must meet the following conditions before they can be labeled "Ultra HD": First, the screen pixels must reach 8 million effective pixels (3840×2160), without changing the screen In the case of resolution, at least one transmission end can transmit 4K video, the display of 4K content must be native, not up-conversion, and the aspect ratio is at least 16:9. At the same time, in the television industry, the same as naming high-definition televisions HDTV, for the naming of 4K televisions, the Consumer Electronics Association of the United States has made an official name for 4K televisions UHDTV, which is also called ultra-high-definition television.
720p format, resolution is 1280×720p/60Hz, line frequency is 45kHz.
4K resolution is 4 times that of 1080p 3840×2160 = 1920×2×1080×2
8K resolution is 4 times that of 4K 7680×4320 = 3840×2×2160×2
The difference between I and p
P: progressive, meaning progressive scan, frame encoding
I: interlace, which means interlaced scanning, field coding
Both are encoding methods in video encoding, with the same resolution
h264 and h265
Different encoding methods
1. What is the video bit rate?
Video bit rate is the number of bits output per second of video data (video color, brightness, and pixels). The commonly used unit is kbps.
2. The necessity of setting the video bit rate
In video conferencing applications, video quality and network bandwidth occupancy are contradictory. Generally, the higher the bandwidth occupied by the video stream, the higher the video quality; if high-quality video effects are required, the larger the network bandwidth is required; The key to solving this contradiction is of course video coding and decoding technology. Judging the pros and cons of a video codec technology is to compare which video quality is better under the same bandwidth condition, and which occupies less network bandwidth under the same video quality condition.
Is the higher the video bit rate, the better the quality? In theory, this is the case, but within the range of our naked eyes, when the bit rate is high to a certain level, it feels like there is no difference. Therefore, the bit rate setting has its optimal value, in the H.264 (also called AVC or X.264) document
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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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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.
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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
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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
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.
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* 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.
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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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