How does voice over Internet protocol (VoIP) work?
There has been a great deal of work, time and effort, which has gone into the overall steps of VoIP creation. This process is anything but simple. However here is a general run down in order to give an idea of how this technological break through came about and how it works.
Using a computer, the sounds from our voice are recorded as sorts by a computer. These sounds are then turned into data. Now of course this is at a very high speed, which is about 8000 times faster than normal. In addition, a compressing process makes that data down to be a smaller amount of information. This is all without removing any of the quality of the sound.
In order to compress these sounds the algorithm, which I am referring to is a CODEC. Many CODEC are best used for compressing voices. This process significantly reduces the bandwidth used in comparison to a normal uncompressed voice stream.
Once the sound has been recorded and compressed, this compressed data is collected into larger amounts of information. This information is then transferred over the IP network.
In this packet, there will be 10 or more milliseconds of audio however with a good set up 20-30 milliseconds are more common.
This process is similar in a sense to sending a very long text message. The text process allows so many digits to be entered. However, the message you are trying to get across is much longer than one text, therefore, you have to type several messages to get the point across, so you have to send several text messages.
Therefore, you can think of data packets as a series of text messages that are compressed together and comes across in one long message.
Much like text messages, a few packets of sound may get lost in the process. The way the CODEC will compensate this, is to fill in the blank areas with sounds that are acceptable for our hearing.
There can also be times that the sounds are delayed in the conversation. This is due to the packets being delayed in the transformation from sound to data. This has been a bit of a problem, however with the growing technologies, this will soon be a hiccup in the past.
There is much more to the process of VoIP, however, this is a basic explanation. It is not just simply the sending of audio and video packets over the Internet. There must also be a protocol agreement between the two computers. This is how they find each other and transfer the information back and forth.
There are a large number of devices that can be used to implement VoIP. Therefore, before the audio or video can be sent over the Internet, between the two computers, a certain protocol must be established to find the remote device.
There was a fear of privacy invasion with the use of VoIP. In order to address the security concerns of the public the RTP was designed with encryption, authentication, and integrity, to prevent the invasion of privacy from happening.
If you are not sure about VoIP and how it will work for your communication needs, keep in mind, you may already be using VoIP on your long distance calling. The process is painless, and can be a very cost effective move. This being that most of the time, you will not pay for the extra services like caller ID, call waiting, Voice messaging and long distance.