A Low Complexity, Narrow Baseline Beamformer For Cell Phones

Abstract

A beamforming method is developed to enhance voice quality and improve speech recognition accuracy for handheld devices. Stringent constraints for this algorithm include a low baseline, low complexity and low hardware requirements. The algorithm utilizes two microphones spaced 4 cm apart, small enough for operation on handheld devices. Method of implementing this frequency -independent algorithm is discussed and is compared to a far field frequency-dependent beamformer. Projected SNR improvements are simulated for both algorithms. Using only two microphones, this novel algorithm represents an excellent compromise among low hardware/software complexity, narrow baseline and SNR improvement.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Broadband beamforming; Frequency invariant beamformer; Narrow baseline; Speech processing

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 ACTA Press, All rights reserved.

Publication Date

01 Dec 2003

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