[Asterisk-Users] Bandwidth usage for codecs

[Kanishka Somaratne]

hi
how much bandwidth is used for the following codecs

723 r 5.3
723 r 6.3
723 r 8

what i know so far is the 

723 r 5.3 uses 5.3 k up and 5.3k down 
723 r 6.3 uses 6.3 k up and 6.3k down 
729 r 8 uses 8 k up and 8k down 

is this correct or is it like the following

723 r 5.3 uses 11 k up and 11k down 
723 r 6.3 uses 13 k up and 13k down 
729 r 8 uses 16 k up and 16k down 

if u guy know, please let me know.