Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 29, 1986
Issued Date -
N/A
app pub date -
Aug 14, 1984
filing date -
Aug 16, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An analog signal stacking method and apparatus permits transmission of n analog signals of given spectrum width over a narrow band communication circuit having bandwidth approximately equal to the spectrum width of one analog signal by compressing the spectrum of each signal by a factor of 1/n and frequency offsetting the compressed signals to occupy contiguous frequency bands within the bandwidth of the circuit. Received signals are processed to remove the frequency offset and expand the baseband signals to restore each analog signal to its normal spectrum. A dial through circuit permits application of the stacking feature to place two conventional dialed calls on a single line of the telephone network using a circuit for processing both dial and voice signals.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully