integrated circuits and computer software for adding audio enhancement to audio played over stereo and multi-channel playback systems, namely DVD players and recorders, televisions, portable radios, audio speakers, stereo systems, home theatre systems, set-top boxes, computers and headphones

'ad':7 'audio':8,11,29 'box':39 'channel':18 'circuit':2 'comput':4,40 'dvd':22 'enhanc':9 'headphon':42 'home':33 'integr':1 'multi':17 'multi-channel':16 'name':21 'play':12 'playback':19 'player':23 'portabl':27 'radio':28 'record':25 'set':37 'set-top':36 'softwar':5 'speaker':30 'stereo':14,31 'system':20,32,35 'televis':26 'theatr':34 'top':38

QSURROUND

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