IT1181895B - Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn. - Google Patents

Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn.

Info

Publication number
IT1181895B
IT1181895B IT48032/85A IT4803285A IT1181895B IT 1181895 B IT1181895 B IT 1181895B IT 48032/85 A IT48032/85 A IT 48032/85A IT 4803285 A IT4803285 A IT 4803285A IT 1181895 B IT1181895 B IT 1181895B
Authority
IT
Italy
Prior art keywords
block
chromonyl
prepn
carboxy
propane
Prior art date
Application number
IT48032/85A
Other languages
Italian (it)
Other versions
IT8548032A0 (en
Inventor
Giovanni Casini
Original Assignee
Nuovo Consor Sanitar Nazionale
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 Nuovo Consor Sanitar Nazionale filed Critical Nuovo Consor Sanitar Nazionale
Priority to IT48032/85A priority Critical patent/IT1181895B/en
Publication of IT8548032A0 publication Critical patent/IT8548032A0/en
Application granted granted Critical
Publication of IT1181895B publication Critical patent/IT1181895B/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.
IT48032/85A 1985-05-03 1985-05-03 Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn. IT1181895B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT48032/85A IT1181895B (en) 1985-05-03 1985-05-03 Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT48032/85A IT1181895B (en) 1985-05-03 1985-05-03 Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn.

Publications (2)

Publication Number Publication Date
IT8548032A0 IT8548032A0 (en) 1985-05-03
IT1181895B true IT1181895B (en) 1987-09-30

Family

ID=11264077

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48032/85A IT1181895B (en) 1985-05-03 1985-05-03 Carboxy-chromonyl:oxy hydroxy-propane and its salts prepn.

Country Status (1)

Country Link
IT (1) IT1181895B (en)

Also Published As

Publication number Publication date
IT8548032A0 (en) 1985-05-03

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