SETUP IN HOME THEATRE OR OTHER SOUND REPRODUCTION EQUIPMENT

摘要

Setup to be used in a home theatre or other sound reproduction system for handling the low frequency sound signals with a signal source providing several full bandwidth digital sound channels (L, R, LS, RS, C) and possibly one or several digital low frequency subwoofer channels (S). The setup consists of delay and level control unit (1...5) at least for each full bandwidth signal channel, which is equipped with a speaker not capable of reproducing low frequency sounds, a first summing stage (6) for creating the sum channel (SC) by summing the delay and level controlled signal channels, a second summing stage (8) for adding the subwoofer signal to the lowpass-filtered sum channel in order to create a digital bass channel and (DB), a DA-conversion-, amplification-, lowpass-filtering- and volume control unit (9) for preforming these functions to the digital bass channel in order to create an analog bass channel AB. Alternatively lowpass-filtering may be done with a digital filter (7) in which case the analog lowpass-filtering may be omitted.