Patent ID: 7778177

Claim:
An apparatus for controlling the quality of service (QoS) of a variable bandwidth multi-codec comprising: a network state detection unit detecting a network state including at least one of a packet loss ratio, a packet loss interval, and a packet delay time based on a real-time transport protocol (RTP) packet transmitted to and received from a destination for which a call connection is established; and a codec control unit updating a transmission rate by comparing a detected resultant value based on the detecting network state with an already set reference value and increasing or decreasing the transmission rate, and controlling the variable bandwidth multi-codec to code data with the updated transmission rate, wherein the network state detection unit detects a network state at predetermined intervals and the predetermined intervals are adjustable via the codec control unit according to the network state such that the predetermined intervals are increased or decreased based on the result of comparing a value of a current detected network state with a value of a previously detected network state.