Cast in Concrete
January 4, 2008
From RFC 3551 (RTP Profile for Audio/Video), for G722:
Even though the actual sampling rate for G.722 audio is 16,000 Hz, the RTP clock rate for the G722 payload format is 8,000 Hz because that value was erroneously assigned in RFC 1890 and must remain unchanged for backward compatibility.
Ouch. Even Internet RFC’s aren’t immune to errors, and backward compatibility will always be with us.