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Algorithm for achieving adaptive tiling of time axis for audio coding purposes

Algorithm for achieving adaptive tiling of time axis for audio coding purposes

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A new algorithm for achieving flexible tiling of the time axis for audio coding purposes is presented. It is based on the calculus of the distances among a predetermined number of time-frequency pairs. From the computed distances, a clustering process determines the final subdivision of each audio frame. Experimental results demonstrates the good performance of the proposed algorithm, which provides high coding efficiency with a reduced complexity.

Inspec keywords: audio coding; adaptive signal processing

Other keywords: audio coding; time-frequency pairs; complexity reduction; time axis; clustering process; audio frame; high coding efficiency; adaptive tiling

Subjects: Speech and audio coding

References

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      • Tewfik, A.H., Ali, M.: `Enhanced wavelet based audio coder', Proc. 27th Asilomar Conf. on Signals, systems and computers, 1993, Pacific Grove, California, USA, p. 896–900.
    2. 2)
      • N. González , A. Pena . An adaptive tiling of the time-frequency plane with application to multiresolution-based perceptual audio coding. Signal Process. , 301 - 319
    3. 3)
      • Ruiz, N.: ‘Codificación de audio basada en la selección de la mejor base de funciones wavelet ortogonales’. Tesis Doctoral, Universidad de Alcalá, 2001.
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    5. 5)
      • Herley, C., Xiong, Z., Ramchandran, K., Orchard, M.T.: `An efficient algorithm to find a jointly optimal time-frequency segmentation using time-varying filter banks', Proc. IEEE Int. Conf. Acoustics, Speech and Signal Processing, 1994, 3, p. 109–112.
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