Adjusting the playing speed and signal pitch of an audio signal in a compressed representation, such as MP3, presents special challenges. The proposed approach modifies the input of the inverse modified discrete cosine transform in the process of MP3 decoding. The method provides a high-quality frequency shift from the mathematical model, which can extract the frequency, amplitude, and phase of the frequency components located at subband boundaries. Using the extracted information, frequency shifts were made and the performance of the proposed method was analyzed and compared with other methods by quantitative and subject tests. For a subjective analysis, the MOS test with five professional musicians was carried out. The subjects generally gave the result a score of 4. The proposed method has a computation complexity of approximately 43% of the synchronized overlap-add algorithm for MP3 music, which is known as a simple frequency-shift algorithm.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
