Weak current College】 【built camera must be understood 10 hardware device】.

Build a camera must have an understanding of the 10 kinds of hardware devices
This article is Beijing century sunflower digital media technology co., Ltd., senior technical staff, in order to help friends who understand video live broadcasting system may involve hardware products.
1, the camera (live video broadcast of the required)
Sony D31, D70, DV cameras, and so on, we want to according to their needs, budget choice for audio/video acquisition front-end. 2, modem, set-top boxes (TV broadcast the required)
If the original TV signals to digital television, live TV, you need a digital set-top boxes, digital set-top box general way AV signal demodulation, provide live one channel TV video source, digital TV set-top box we generally recommended that select large manufacturers such as: CHANGHONG, Haier, etc; if the original signal to cable TV (RF) signals, we generally recommend using RF modem, if you want synchronous demodulation out multiple TV channels AV signal, we recommend using professional multi-channel radio modem TV2AV, running stable and easy. 3. video acquisition card
Currently available leave audio and video capture card, in order to be able to have a commonality, we propose to choose compatibility good acquisition card, so that both can do video live broadcast, you can also do NLE systems acquisition card use, generally choose big brand manufacturers, such as: Osprey series, Winnov series, round steel, 10moons, high build, etc.; 4, professional encoder (multiple channel live private, such as television)
Campus, Government, business and other group types that users often need to construct a network TV stations, as it involves multiple channels of live, this is to use the traditional acquisition card + software, would be very inconvenient, it is difficult to be simultaneously broadcast multiple TV channels, this kind of situation we recommend the use of multiple video encoding device, such as: century sunflower VOD machine AVCaster, Envivio 4Caster of. 5. video switcher
Live scene possibly more, we will need to switch scene, this time with video switcher, video switcher is good or bad will directly affect the quality of the broadcast, we recommend the use of large brand, reliable switch, switch workmanship, use of the material is relatively good, generally from the outside will be able to have a preliminary judgment. 6, the audio matrix
For more than one sound source, select specify output, we get the audio matrix, we select the audio matrix is to pay attention to it's input and output parameters, and have purchased the parameters of the acquisition card. 7, professional-standard acquisition card (such as VGA acquisition card)
In order to capture the special video signal, we need professional video capture card, for example to live games, we can pass VGA card real-time acquisition player computer screen, through live software can make the game live, common to the VGA card are: United Kingdom Datapath company VGA card, domestic companies have microview VGA card. 8, set-top boxes
In the TV or monitor to receive video live, we need to set-top box, choose the set-top boxes, according to the set-top box decoding capability (the ability to decode audio and video formats), and supported network protocols. As a century of sunflower company VOD software LiveCast, as can support multiple compression LiveCast is encoded, we judge the decoding, determine the set-top box support encoding format LiveCast is able to support, network protocols, we should support HTTP protocol or transport stream. 9, microphone, ECHO suppressor
During the live broadcast, you want to use a microphone and echo suppressor, select directed according to the situation or to capture the entire Mike Hall sound Mike, according to the situation when echo is too large, or you can use the echo suppressor. 10, AV cable, conversion head
Do not underestimate these gadgets, this is the camera effects of the first condition, we recommend regular manufacturers of high quality audio and video with shielded cable, and taking into account the signal attenuation, not too long; use conversion head, compelling use, to choose the good, the best choice of copper conductor, looks better brightness, holding that there is a kind of feeling.