Patent ID: 7835912

Claim:
A signal processing method in packet loss concealment, comprising: receiving a good frame following a lost frame, obtaining an energy ratio R of energy of a signal of the good frame to energy of a synthesized signal corresponding to the same time of the good frame; and adjusting the synthesized signal in accordance with the energy ratio; wherein the synthesized signal is generated over at least the lost frame and the good frame following the lost frame; wherein the energy ratio R of energy of the signal of the good frame to energy of the synthesized signal corresponding to the same time of the good frame is: R = sign ⁡ ( E 1 - E 2 ) ⁢  E 1 - E 2  E 1 where sign( )is a symbolic function, E 1 is the energy of the synthesized signal corresponding to the same time of the good frame, and E 2 is the energy of the signal of the good frame; wherein the synthesized signal is adjusted in accordance with the following formula: yl ⁡ ( n ) = yl ′ ⁡ ( n ) * ( 1 - R L + N * n ) n = 0 , … ⁢ , L + N - 1 , wherein L is the frame length, N is the length of the signal required for cross-fading, yl′ (n) is the synthesized signal before adjusting, and yl(n) is the synthesized signal after adjusting.