Abstract
MP3 is the popular audio coding standard. But now, a new higher quality audio coding standard Advanced Audio Coding (AAC) is proposed and widely used. The quantization/re-quantization is essential in both MP3 and AAC. This paper proposes a new high accuracy estimation algorithm for MP3 and MEPG-4 AAC audio coding. The algorithm can be applied not only for re-quantization process in decoder, but also for quantization in encoder. According to the floating-point behavior description, the proposed algorithm can achieve the lowest error result measured in quantization/re-quantization. Furthermore, in order to maintain the high quality with limited data precision, finite word length for fixed-point effects are investigated. Our algorithm has the low complexity advantages of multiplication-free and low memory requirements which will be more suitable in VLSI design for audio encoder/decoder.
| Original language | English |
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| Pages (from-to) | III/851-III/854 |
| Journal | Proceedings - IEEE International Symposium on Circuits and Systems |
| Volume | 3 |
| State | Published - 2002 |
| Event | 2002 IEEE International Symposium on Circuits and Systems - Phoenix, AZ, United States Duration: 26 May 2002 → 29 May 2002 |