IT1181379B - Phosphorane cpds. - Google Patents

Phosphorane cpds.

Info

Publication number
IT1181379B
IT1181379B IT41003/84A IT4100384A IT1181379B IT 1181379 B IT1181379 B IT 1181379B IT 41003/84 A IT41003/84 A IT 41003/84A IT 4100384 A IT4100384 A IT 4100384A IT 1181379 B IT1181379 B IT 1181379B
Authority
IT
Italy
Prior art keywords
block
data
digitised
communication link
circuit
Prior art date
Application number
IT41003/84A
Other languages
Italian (it)
Other versions
IT8441003A0 (en
IT8441003A1 (en
Inventor
Giovanni Moggi
Graziella Chiodini
Gianna Cirillo
Original Assignee
Montedison Spa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montedison Spa filed Critical Montedison Spa
Priority to IT41003/84A priority Critical patent/IT1181379B/en
Publication of IT8441003A0 publication Critical patent/IT8441003A0/en
Publication of IT8441003A1 publication Critical patent/IT8441003A1/en
Application granted granted Critical
Publication of IT1181379B publication Critical patent/IT1181379B/en

Links

Abstract

The data reduction apparatus is used in a system where speech signals, e.g. between telephones, are digitised in a circuit and later reconverted. Successive blocks of digitised data, e.g. 16m seconds thereof, are compared with each other in the frequency domain in a comparator. The conversion is effected in a circuit block. If one block is similar to its predecessor within pre-set limits, that block is not sent to the output, and instead a control signal is passed to the communication link to instruct a store to repeat the previous block at the other end of the communication link. Thus only critical data blocks are transmitted and the data rate is reduced.
IT41003/84A 1984-06-11 1984-06-11 Phosphorane cpds. IT1181379B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT41003/84A IT1181379B (en) 1984-06-11 1984-06-11 Phosphorane cpds.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT41003/84A IT1181379B (en) 1984-06-11 1984-06-11 Phosphorane cpds.

Publications (3)

Publication Number Publication Date
IT8441003A0 IT8441003A0 (en) 1984-06-11
IT8441003A1 IT8441003A1 (en) 1985-12-11
IT1181379B true IT1181379B (en) 1987-09-23

Family

ID=11250012

Family Applications (1)

Application Number Title Priority Date Filing Date
IT41003/84A IT1181379B (en) 1984-06-11 1984-06-11 Phosphorane cpds.

Country Status (1)

Country Link
IT (1) IT1181379B (en)

Also Published As

Publication number Publication date
IT8441003A0 (en) 1984-06-11
IT8441003A1 (en) 1985-12-11

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