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CCDA - G.7xx codec
CCDA - G.7xx codec
14
Engineering
Graduate
10/16/2007

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Cards

Term
What is the bit rate in kb/s for the G.711 codec?
Definition
64kbps
Term
What is the bit rate in kb/s for the G.721 codec?
Definition
32 kbps
Term
What is the bit rate in kb/s for the G.722 codec?
Definition
64 kbps
Term
What is the bit rate in kb/s for the G.722.1 codec?
Definition
24 and 32 kbps
Term
What is the bit rate in kb/s for the G.722.2 codec?
Definition
16 kbps
Term
What is the bit rate in kb/s for the G.726 codec?
Definition
16, 24, 32, and 40 kbps
Term
What is the bit rate in kb/s for the G.727 codec?
Definition
Varies, with 2, 3, 4, and 5 kbps
Term
What is the bit rate in kb/s for the G.728 codec?
Definition
16 kbps
Term
What is the bit rate in kb/s for the G.729 codec?
Definition
8 kbps
Term
What is the bit rate in kb/s for the G.723.1 codec?
Definition
5.6 or 6.3 kbps
Term

What are the bite rates for the following codec :

1. G711

2. G.722

3. G.723

4. G.726

5. G728 

Definition

1. 64 kbps

2. 64 kbps

3. 24 and 40 kbps

4. 16/24/32/40 kbps

5.  16 kbps

Term

What are the bit rates for the following codec?

1. G.721

2. G.722.1

3. G.723.1

4. G.727

5. G.729 

Definition

1. 32 kbps

2. 24/32 kbps

3. 5.6/6.3 kbps

4. varies, from 2/3/4/5 kbps

5 8 kbps

Term
What is the basic formula when calculating how many calls can be made when given the codec be used, the payload size, the packet header size, and wheather or not CRTP is being used?
Definition

1. Find out the bit rate of the specified codec.

2. Calculate the total size of the payload. This would be the starting payload + the header size + 40 bytes (IP+UDP+RTP) (2-4 bytes is CRTP is used)

3. Divide the new payload by the starting payload, to get the new percent needed

4. Multiply the new percent with the bit rate for the specified codec

5. Divide the available bandwidth by the new requirement per call 

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