The Post-processing Unit of MPEG-1 Layer III

Introduction

The post-processing unit of MPEG-1 Layer III (MP3)

¨ DWIMDCT

¨ Synthesis filterbank

These two are the most computationally intensive area in MP3 algorithm

Features

DWIMDCT

¨ IMDCT

¨ Dynamic windowing

¨ Overlap between granules

Synthesis filterbank

¨ SIMDCT

¨ IPQMF

Results

Fast algorithm

1.DWIMDCT

2.SIMDCT

Architecture

Computation comparisons between the original and proposed decoding algorithm

Comparisons of required coefficients between the original and proposed scheme

Chip specification

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