Method and apparatus for detecting noise of audio signals

An apparatus for detecting noise of audio signals, comprising:

• a storage device;
• and
• a processor, coupled to the storage device, converting an audio signal into a plurality of audio frames, wherein the audio frames are arranged in a chronological order while taking a target frame as a center, calculating a plurality of magnitudes respectively corresponding to a plurality of spectral components of each of the audio frames, and stores the magnitudes to the storage device, calculating differences between the adjacent magnitudes in a time-frequency domain to obtain a plurality of difference values in at least two directions orthogonal to each other in the time-frequency domain, wherein the time-frequency domain is defined by the audio frames, determining a maximum degree of difference of the magnitudes in the time-frequency domain according to the difference values, and determining whether a part of the audio signal corresponding to the target frame is a noise according to the maximum degree of difference.