A method for processing audio data, wherein the method comprises: obtaining a noise frame of an audio signal, and decomposing the noise frame into a noise low-band signal and a noise high-band signal; and encoding the noise low-band signal by using a first discontinuous transmission mechanism and transmitting the encoded noise low-band signal by using the first discontinuous transmission mechanism, and encoding the noise high-band signal by using a second discontinuous transmission mechanism and transmitting the encoded noise high-band signal by using the second discontinuous transmission mechanism, wherein a policy for sending a first silence insertion descriptor frame, SID, of the first discontinuous transmission mechanism is different from a policy for sending a second SID of the second discontinuous transmission mechanism; wherein the encoding the noise high-band signal by using a second discontinuous transmission mechanism and transmitting the encoded noise high-band signal by using the second discontinuous transmission mechanism comprises: generating a deviation extent value according to a first ratio and a second ratio, wherein the first ratio is a ratio of an energy of the noise high-band signal to an energy of the noise low-band signal of the noise frame, and the second ratio is a ratio of an energy of a noise high-band signal to an energy of a noise low-band signal at a moment when a SID comprising a noise high-band parameter is sent last time before the noise frame; and determining whether the deviation extent value reaches a preset threshold; if yes, encoding a SID of the noise high-band signal by using the policy for encoding the second SID, and sending the SID; and if not, determining that the noise high-band signal does not need to be encoded and transmitted. obtaining a noise frame of an audio signal, and decomposing the noise frame into a noise low-band signal and a noise high-band signal; and encoding the noise low-band signal by using a first discontinuous transmission mechanism and transmitting the encoded noise low-band signal by using the first discontinuous transmission mechanism, and encoding the noise high-band signal by using a second discontinuous transmission mechanism and transmitting the encoded noise high-band signal by using the second discontinuous transmission mechanism, wherein a policy for sending a first silence insertion descriptor frame, SID, of the first discontinuous transmission mechanism is different from a policy for sending a second SID of the second discontinuous transmission mechanism; generating a deviation extent value according to a first ratio and a second ratio, wherein the first ratio is a ratio of an energy of the noise high-band signal to an energy of the noise low-band signal of the noise frame, and the second ratio is a ratio of an energy of a noise high-band signal to an energy of a noise low-band signal at a moment when a SID comprising a noise high-band parameter is sent last time before the noise frame; and determining whether the deviation extent value reaches a preset threshold; if yes, encoding a SID of the noise high-band signal by using the policy for encoding the second SID, and sending the SID; and if not, determining that the noise high-band signal does not need to be encoded and transmitted.