A VLSI implementation of filterbank for MPEG2/4 AAC encoder

Tsung Han Tsai, Yu Jie Sha

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we proposed a VLSI architecture of the modified discrete cosine transform (MDCT) for MPEG 2/4 AAC encoders. The MDCT transforms the time domain input signals to the frequency domain spectrums. It is considered one of the most computational intensive part in implementing the AAC encoder. The AAC encoder allows four types of audio blocks while encoding the audio files. With our algorithm, the proposed design can share the coefficients needed in the MDCT. Moreover, we used a 2-dimensional folding technique to reduce the hardware cost while maintaining the audio quality. The proposed design is realized in TSMC 0.18-um 1P6M technology and is operated at 50 MHz. With these techniques on special hardware design, the result shows some advantages on low complexity.

Original languageEnglish
Title of host publicationApplied Materials and Electronics Engineering, AMEE 2012
Pages569-572
Number of pages4
DOIs
StatePublished - 2012
Event2012 International Conference on Applied Materials and Electronics Engineering, AMEE 2012 - HongKong, Hong Kong
Duration: 18 Jan 201219 Jan 2012

Publication series

NameAdvanced Materials Research
Volume378-379
ISSN (Print)1022-6680

Conference

Conference2012 International Conference on Applied Materials and Electronics Engineering, AMEE 2012
Country/TerritoryHong Kong
CityHongKong
Period18/01/1219/01/12

Keywords

  • Digital audio coding
  • Filterbank
  • MDCT
  • MPEG-2/4 AAC encoder

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