Integrated circuits and embedded firmware used in portable phones for controlling the operation of the phone, and for performing general signal processing functions, namely, speech compression, acoustic echo cancellation, and noise suppression; and for enabling the user interface features namely, voice memo, voice recognition, audio enhancements, hands-free operation, GPS-based E911 position location; and related developer's tool kit with instruction manuals.

'acoust':27 'audio':45 'base':53 'cancel':29 'circuit':2 'compress':26 'control':11 'develop':59 'e911':54 'echo':28 'embed':4 'enabl':35 'enhanc':46 'featur':39 'firmwar':5 'free':49 'function':23 'general':20 'gps':52 'gps-base':51 'hand':48 'hands-fre':47 'instruct':64 'integr':1 'interfac':38 'kit':62 'locat':56 'manual':65 'memo':42 'name':24,40 'nois':31 'oper':13,50 'perform':19 'phone':9,16 'portabl':8 'posit':55 'process':22 'recognit':44 'relat':58 'signal':21 'speech':25 'suppress':32 'tool':61 'use':6 'user':37 'voic':41,43

QDSP4

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