Reduced memory implementation technique of filterbank and...

Details Reduced memory implementation technique of filterbank and... Reduced memory implementation technique of filterbank and...

2003-10-14

2008-08-26

Hudspeth, David R. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

With content reduction encoding

C704S203000, C341S050000

Reexamination Certificate

active

07418396

ABSTRACT:
Presented herein is a reduced memory implementation technique of filterbank and block switching for real-time audio applications. Calculation of the pulse code modulated samples from the IMDCT samples and inverse window functions is simplified by exploiting the symetric qualities of the IMDCT function. As a result, memory requirements and operations are significantly reduced.

REFERENCES:
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patent: 7065491 (2006-06-01), Tsai et al.
Tsai et al (“Architecture Design for MPEG-2 AAC Filterbank Decoder Using Modified Regressive Method”, Acoustics, Speech, and Signal Processing, 2002. Proceedings. (ICASSP '02). IEEE International Conference on vol. 3, May 13-17, 2002 pp. III-3216-III-3219 vol. 3).
Paik et al. (“Design of a novel synthesis filter for real-time MPEG-2 audio decoder implementation on a DSP chip”, Consumer Electronics, IEEE Transactions on Publication Date: Nov. 1999).

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