http://slideplayer.com/slide/4179379/

at slide #18, have a question about pulse stufing.

i understand about 'pulse stuffing' and why this we need this.

but i can't get it why 7.2kbps raise to 8kbps.

i think this is because

1. after 4bit ADC, signal output rate is 64kbps

2. there are 8 digital source (from src4 to src11)

3. 64kbps can be chopped to 8 x 8bps.

4. so, at 1 frame, each slot can contain 8kb.

5. we need to raise to fill slot -> raise 7.2 to 8k using pulse stuffing

am i right? or please write your explanation. Thanks.