Subband filtering is one of the compute-intensive operations in the MPEG audio coding standard. By using the periodicity of the cosine and the symmetric property of the window, the subband filtering equation can be rearranged to a 32-point DCT-II or DCT-III. That is to say, window operation is followed by a 32-point fast DCT and is computed efficiently by taking advantage of the modified window coefficients. So, in MPEG subband filtering by the authors' fast algorithm, 2560 multiplications in the MPEG subband filtering can be reduced to only 464 multiplications.

Authors: Park, Sung-Hee; Kim, Yeon-Bae; Kim, Sang-Wook; Seo, Yang-Seock
Affiliation: Samsung Advanced Institute of Technology, Suwon, Korea
AES Convention: 99 (October 1995) Paper Number: 4090
Publication Date: October 1, 1995
Subject: Low Bit-Rate Audio: Technologies

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.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

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.