A Large-capability Self-adaptive Steganography Algorithm Based on G.723.1

Small capability is always the shortcoming of low bit speech code steganography.A large-capacity steganography algorithm in G.723.1 was introduced.The algorithm proposed a way to hide information in the noise frames and analyzed concealment performance of each parameter in source codec.Then the suitable bits situation in noise frames was proposed.Test results demonstrated that embedding in noise had good concealment performance.The self-adaptive steganography algorithm increased hiding rate of G.723.1 obviously.