Patent ID: 7746780

Claim:
An adaptive estimation method of multimedia data transmission rate, the method comprising: receiving a real-time transport protocol (RTCP) receiver report packet from a multimedia data reception unit; detecting packet loss rate from the RTCP receiver report packet; and adaptively estimating an available transmission rate according to a range within which the packet loss rate belongs; wherein one RTCP sender report packet is transmitted every time a predetermined number of RTP packets are transmitted, wherein the estimating step comprises: estimating the available transmission rate according to a first equation, when the packet loss rate is in a first range; estimating the available transmission rate according to a second equation, when the packet loss rate is in a second range; and estimating the available transmission rate according to a third equation, when the packet loss rate is in a third range, wherein the second equation is: R 2 ⁡ ( p ⁡ ( t n ) ) = s × 20 × ( 1 - α × p ⁡ ( t n ) ) LSR ⁡ ( t n ) - LSR ⁡ ( t n - 1 ) + β , wherein: S=packet size, P(t n )=packet loss rate detected from n th RTCP receiver report (RR) packet, LSR(t n )=transmission time of n th RTCP receiver report (RR) packet, and α, β=weight factors.