초록 ▼

In a teleconferencing system activity levels of digital voice signals are compared over activity selection times and the signals are multiplied, over frame delays, by predetermined constants dependent on the relative levels of activity. The most active signal is multiplied by a constant of at least

In a teleconferencing system activity levels of digital voice signals are compared over activity selection times and the signals are multiplied, over frame delays, by predetermined constants dependent on the relative levels of activity. The most active signal is multiplied by a constant of at least about 0.8, so that signal dominates through a frame delay, but the frame delays are sufficiently short that multiple speakers can be understood from the summed signal. No speaker maintains dominance for a sufficiently long time to substantially suppress speech of others.

대표청구항 ▼

Electronic signal processing apparatus for combining digital voice signals in teleconferencing comprising: comparator means for comparing the activity levels of a plurality of digital signals to be combined and for determining a most active digital signal which has the greatest activity level; multi

Electronic signal processing apparatus for combining digital voice signals in teleconferencing comprising: comparator means for comparing the activity levels of a plurality of digital signals to be combined and for determining a most active digital signal which has the greatest activity level; multiplier generator means for generating a multiplier for each of the digital voice signals, the multiplier for the most active digital signal being substantially greater than the other multipliers and the sum of the multipliers being about one; digital multiplier means for multiplying each digital voice signal with its respective multiplier, the same multiplier being applied through a plurality of digital samples; and digital summing means for summing the outputs of the multiplier means.