2006-10-10 08:11:03 · 4 answers · asked by Anonymous in Computers & Internet ➔ Computer Networking
Packet switching really doesn't enter into it, other than being a much better alternative to the circuit-switched sytem in use by the PSTN (Public Switched Telephone Network).
I believe that voice quality has improved for two reasons:
1. Improved bandwidth - Years ago we were trying to implement VOIP when 128k ISDN lines were the norm. Nowadays, even the school network I work for is pushing VOIP over fiber links between buildings.
2. Improved Codecs: Even the G.729 codec at 8,000 samples per second is a nice compromise between sound and efficiency. Some might say it is the most commonly used VOIP codec, but I generally see more G.711, sampling at 64,000 per second, which is compressed so well it's generally not perceptable to the human ear.
There's a decent article that will give you a leg up on the topic in the Know your Source below:
2006-10-10 08:25:13 · answer #1 · answered by spinsmart 2 · 2⤊ 0⤋
1
2016-12-20 14:04:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
simple answer the improvement in technology
eg from dialup to broadband, replacing twisted copper pair cables with fiber optics to give large data transmition etc..
2006-10-10 08:13:32 · answer #3 · answered by Paultech 7 · 0⤊ 0⤋
In additon to spinsmart, the development of QoS has also helped out
2006-10-10 09:10:00 · answer #4 · answered by ifoam 3 · 1⤊ 0⤋
I Dont know but to see its answers i m answer to track this question
2006-10-10 08:16:19 · answer #5 · answered by alamgeer 2 · 0⤊ 0⤋