—        Voice chat used to create a voice call interaction. In this process two type of voice transformation as possible

1. with use of vocoder

2. With out use of vocoder

—        two types of vocoder used

1. Using first law

2. Using second law

Both of these laws used to convert the analog to digital

First law:

• It used to create a small dynamic range. It takes   input data in the size of 13 bit. During the process it converts these 13 bit data into 8 bit data for transfer process.
• In a law it create a small signal distortion

Second law:

• It used to create a large dynamic range. It take   input data in the size of 14bit .During the process these 14 bit magnitude by 32 bit for transfer process
• It reduces small signal distortion