Wave transmission lines and networks – Coupling networks – Frequency or time domain filters and delay lines utilizing...
Patent
1980-05-05
1982-07-06
Nussbaum, Marvin L.
Wave transmission lines and networks
Coupling networks
Frequency or time domain filters and delay lines utilizing...
84 124, 84DIG26, 179 1J, 333166, H03H 1502, G10H 100
Patent
active
043385818
ABSTRACT:
Room acoustics simulation is achieved by digitally defining delay and weighting parameters and generating sampled analog signal responses. In the early portion of a response term an accurate impulse response is provided and subsequently high echo density is simulated using sampled analog signal Schroeder sections. A sampled data analog signal device is used which employs charge transfer devices as programmable delay media, multiplying digital to analog converters to generate weighting of the analog signal and a general purpose microprocessor as a parameter calculator. The early impulse response characteristic is accomplished by providing a time domain finite impulse response (FIR) section in a transversal filter arrangement which directly feeds to an ultimate output and to parallel comb filter sections which in turn input to at least one all pass section of the so-called Schroeder configuration. The charge transfer devices are employed as programmable delays to propagate the analog signals. All weighting coefficient products are generated by multiplying digital-to-analog converters.
REFERENCES:
patent: 3110771 (1963-11-01), Logan, Jr. et al.
patent: 4063034 (1977-12-01), Peters
patent: 4181820 (1980-01-01), Blesser et al.
patent: 4244262 (1981-01-01), Imai
Nussbaum Marvin L.
The Regents of the University of California
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