Trends in cell phone voice processing

Chris Forrester

Abstract


Some of the significant trends in cell phone voice processing are discussed. It has been observed that the increase in processing power has enabled DSP audio engineers to use more advanced voice processing to provide features and solve several unresolved problems. Continued efforts have been made to develop smaller, thinner, and lighter cell phones after the introduction of the first wireless phone. This trend to shrink the cell phone has a significant impact on the acoustic design and has driven the need for better voice processing features and performance. Microphones move away from the mouth of a speaker as devices continue to shrink in size, reducing signal-to-noise ratio (SNR) at the microphone. Another trend has emerged to provide multiple microphones in an effort to address the need for improved background noise reduction.

Keywords


Acoustic intensity; Microphones; Mobile phones; Signal to noise ratio; Telecommunication equipment; Telephone; Acoustic design; Background noise reduction; Cell phone; In-cell; Processing power; Significant impacts; Wireless phones

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