The performance of wavelets in terms of vanishing moments, regularity, and complexity is investigated for low bit-rate coding of audio signals. To assess the coding gain of wavelets, a codec model has been designed and implemented based on a wavelet packet algorithm and an auditory perception model combined with entropy noiseless coding. The wavelet packet-based coding approach is compared to the MPEG-audio international standard in terms of objective and subjective measurements and is shown to be superior to MPEG-audio Layer I and competitive with Layer II. The trade-offs between the two approaches are discussed.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.