What is a Webcast?

Network broadcasting is an important embodiment of the multimedia form of network communication, and also an important embodiment of the online development of radio and television media. For traditional broadcasting, network broadcasting is a process of broadcasting development, which makes up for the shortcomings of traditional broadcasting.

April 1995, located

Network radio, also called Internet radio, is the product of the fusion of new media and traditional media, and is a new exploration of the development of broadcasting in the network age. It moves the traditional air radio to the Internet, and the professional Internet radio host broadcasts it in real time through the Internet. Users can listen to it by logging in to the radio website. Internet radio stations do not need to occupy satellite orbits and frequency resources, and their broadcast effects are affected by network bandwidth. ^[2]

Speaking of the role of NJ in webcasting, an "old" NJ wrote humorously: "If you say this NJ, the role is great. You know, for a website or forum, NJ is a window, As soon as a guest enters the door, the first thing I hear is the broadcast of our radio station NJ. The content of the forum is completely invisible. You must have experienced it as a guest? If the radio program is done well, the guest may leave a long message Live; if the radio station is exhausted, this guest may never come again, what do you say? So, every NJ is a gold sign on this website, the prosperity of the commune must rely on you "How about it? Unique sense of mission?"

The working procedure of NJ is usually:

Judging from the Internet, it has been less than a year since the emergence and prosperity of NJ, but I searched more than 97,000 NJ entries from Google Online, showing that it is gaining popularity.

The advantages of NJ are summarized as follows:

1.

With the popularization of the Internet in our country, Internet radio has also attracted more and more attention. On the whole, although web broadcasting has not been in China for a long time, it has developed very rapidly. Traditional broadcast media have joined the network broadcast one after another. In July 2005, China International Broadcasting Station launched the "International Online" webcast; in July 2005, China National Radio released the "Yinhetai" webcast. Various phenomena indicate that at present, webcasting has been obtained in China. Full recognition of mainstream media. Network broadcasting has developed rapidly in China. Moreover, with the continuous development and innovation of Internet technology, network broadcasting will also gain more development space. ^[3]

Network broadcasting is not only a new media format, it can realize professional and personalized service channels, and provide new services such as professional services for enterprises and institutions. It has more fully inherited the advantages of both network and broadcasting, mainly reflected in the following five aspect. ^[2]

It is foreseeable that with the development and growth of webcasting, more and more young people will come into webcasting and act as NJs. Whether it is a personal NJ (such as

Advantages: Network broadcasting has been digitized and networked from program production to transmission. The system has a high signal-to-noise ratio and does not generate noise during processing and transmission. Therefore, it can obtain better sound quality and can also perform stereo transmission.

Realize

Excellent Internet radios include: Listening to a music radio station, the voice of Chinese comrades, and the voice of Chinese public welfare.

Network broadcasting network radio erection method

Preliminary preparation

Hardware : A CPU with strong floating-point computing power (AthlonXP or Pentium 4 or better is best); a good one

Sound card (good for low CPU occupants, such as the innovative Live! And Audigy series); good uplink bandwidth (at least ISDN, can withstand 2 to 3 listeners); a microphone (too much DJ addiction) Of course, the above are only recommended configurations, and low points are also possible.

Software : Windows Media Encoder 9.0: Small resource occupation, high sound quality at low bit rate, easy to learn, easy to use and free; numerous digital audio format files: MP3, MPC, WMA, APE, WAV or CD, even VCD, DVD, etc. .

Encoder settings : Start the Windows Media encoder, and the software will automatically pop up the setup wizard. Select the default "Broadcast Live Event". Then select a sound card with a better recording quality as the audio device. If there is only one onboard AC'97, choose the default. The next choice is to choose the server that sends the broadcast, is it the PC that is currently being used, or a dedicated Windows Media server. Of course I can only use my computer when I wait for DIYer. Select Auto-encoder pull pass. The default service port of Windows Media Encoder is port 8080, but it is best not to use this default setting, click Find Available Ports, select a port that is not currently occupied, and choose a number that is easier to remember. The encoding options are related to bandwidth and sound quality, and also to the occupation of system resources, which is very critical. If the system configuration is high, you can choose "Multi-Bit-Rate Coding (CBR)". Selecting 135/70 / 54Kbps can adapt to more bandwidth conditions. If you do not plan to record, it is not recommended to save the broadcast to a file. So as not to take up unnecessary hard disk space.

Note : The most important thing in the above settings is the choice of encoding bit rate. If you are still not sure what encoding bit rate should be used, please ask a netizen to help you test it is a good choice.

Before debugging, you also need to modify the system's default recording options. Open the audio control panel, click "View-Audio Panel-Mixer-Recording Control-Options-Properties-Show the following volume control", check "Stereo Mixer" (due to different sound cards, mainly due to different name definitions in the driver, This option name may be different on different systems), choose an option that can record the entire sound of the system (an option that is not very clear, like Stereo Mixer here does not say what the device is, unlike "Mic" or the like OK then). After selecting, turn off the "Recording Control".

Note: If you can't find this option, please update the sound card driver. The onboard AC'97 has this option. Most sound cards support the collection of all sounds of the system. The choice of recording equipment is very important, it is related to whether the radio stations collected in real time can sound out. If it is not set correctly, you will not be able to create a radio station for real-time acquisition.

After setting up the encoder, click "Start Encoding" and find the favorite music to start broadcasting. Note that you must turn off the firewall (especially WinXP). At this time, the audio played by any player will be broadcasted externally through his personal radio station, so you can choose the player freely, try to use the player with excellent sound quality and small system resource occupation. Now you can start inviting your friends to listen to your broadcasts! address is:

mms // your IP address your custom port

Tip : Click "File-Save" to save the current settings to a file and make a few completely different settings. What kind of settings you want to call next time, just open the corresponding settings file.

Webcast establishes "source" mode radio

Although the real-time encoded radio station has good flexibility, it also has a lot of troubles: computer-operated system sounds, including QQ, MSN, and so on, will be broadcasted, affecting the broadcast quality. At the same time, the audience will often ask for songs, but you don't really want to listen to these songs, which is also a very depressing thing. What's more headache is that the microphone can broadcast all the sound in the room no matter when you want to talk. What is this DJ?

Fortunately, the Windows Media encoder provides a way to build a "source" radio. You can easily do songs and listen to songs yourself, and operate other programs without conflict. Click "New Session-Custom Session-Source Tab-Source From-File-Browse" on the main interface. After adding multiple files, there will be a lot of "sources" on the left. Select these "sources" and you can see that these are The file you just selected for playback. Then we need to set the action after the end of this source for each source, set to "Scroll to the next source" for continuous playback, and "Scroll to the first source" for overall loop playback.

Now click "Start Encoding" and you can broadcast to the outside. At this time, the encoder will directly encode and output the "source" file, which is not audible on your PC. Even if you use other players, the music is not played. Will enter the broadcast.

Tip : Just click View-Properties Panel to continue to operate on the source that is not currently playing, including adding and deleting Sources.

At this point, you can not only add other files to come in, but also add the device as the source, that is, we can use the device as the next source after playing a song, so that we can add between the two songs Voice over and so on to achieve the effect of a radio DJ.

Click "Add-Device-Configuration-Properties-Plug Line" under "Source" and select the required input device from the drop-down list. If you want to achieve the effect of the host, you can choose Mic (microphone), so you can pass the microphone Host the radio program; or select "Stereo Mixer" to play all the sounds of the system just like a real-time radio station. At this time, we can use the player to play the accompaniment while singing into a microphone to perform the Live Show or while playing songs Post your own review.

After setting, click "OK-Apply" to make the previous settings take effect. When you want to use this source, you can use the up and down arrows next to the "Add" button to move the selected source and place it to a near-end Behind the source (if you want to comment after a "source", you can move the device "source" behind that "source"). If you want to perform Live Show, you can also use the plug-in to make some modifications to the human voice, such as adding reverberation, etc., not much introduction.

Tip: The source method is a very special method, and it is also a more complicated method, but it can achieve more professional effects. At the same time, if set properly, you can get the radio and work right.

How to set up a radio station for Internet users

Some campus network users also have independent Internet IPs, but some schools can only be assigned one IP per dormitory. That is to say, students who share the Internet have no independent IPs. They belong to intranet users. How about it?

Intranet users need their gateway server (the gateway server has an independent Internet IP) to support port mapping and map their broadcast port to the gateway's port. Generally speaking, the current small gateway routers, or PCs with dual network cards as gateways can do port mapping. For the port mapping method, please refer to the instruction manual of the router. Generally, there will be a more detailed description. The port mapping of the gateway PC is related to the operating system. "Can be set port mapping.

Some software such as CCproxy also has port mapping function. After the setting is completed, the broadcast address is mms // the IP of the gateway.

If you want to build a long-term radio station, it is recommended that you apply for a second-level domain name to simplify your work, which will save you a lot of trouble (although this is not an effective method). This broadcast link is:

mms // your domain name your broadcast port

In short , an Internet radio station needs to be established and promoted by you. To attract the audience, you must rely on excellent content, good connection speed and sound quality to be perfect. I hope everyone's radio will be more exciting.