IT1181654B - Arene carboxylic acids prepn. - Google Patents

Arene carboxylic acids prepn.

Info

Publication number
IT1181654B
IT1181654B IT48042/85A IT4804285A IT1181654B IT 1181654 B IT1181654 B IT 1181654B IT 48042/85 A IT48042/85 A IT 48042/85A IT 4804285 A IT4804285 A IT 4804285A IT 1181654 B IT1181654 B IT 1181654B
Authority
IT
Italy
Prior art keywords
block
data
carboxylic acids
digitised
communication link
Prior art date
Application number
IT48042/85A
Other languages
Italian (it)
Other versions
IT8548042A0 (en
Inventor
Sergio Fumasoni
Claudio Fumasoni
Giancarlo Ortaggi
Original Assignee
Sergio Fumasoni
Claudio Fumasoni
Giancarlo Ortaggi
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 Sergio Fumasoni, Claudio Fumasoni, Giancarlo Ortaggi filed Critical Sergio Fumasoni
Priority to IT48042/85A priority Critical patent/IT1181654B/en
Publication of IT8548042A0 publication Critical patent/IT8548042A0/en
Application granted granted Critical
Publication of IT1181654B publication Critical patent/IT1181654B/en

Links

Landscapes

  • Time-Division Multiplex Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

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.
IT48042/85A 1985-05-06 1985-05-06 Arene carboxylic acids prepn. IT1181654B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT48042/85A IT1181654B (en) 1985-05-06 1985-05-06 Arene carboxylic acids prepn.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT48042/85A IT1181654B (en) 1985-05-06 1985-05-06 Arene carboxylic acids prepn.

Publications (2)

Publication Number Publication Date
IT8548042A0 IT8548042A0 (en) 1985-05-06
IT1181654B true IT1181654B (en) 1987-09-30

Family

ID=11264146

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48042/85A IT1181654B (en) 1985-05-06 1985-05-06 Arene carboxylic acids prepn.

Country Status (1)

Country Link
IT (1) IT1181654B (en)

Also Published As

Publication number Publication date
IT8548042A0 (en) 1985-05-06

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