IT1181059B - Printed circuit prodn. - Google Patents

Printed circuit prodn.

Info

Publication number
IT1181059B
IT1181059B IT42909/84A IT4290984A IT1181059B IT 1181059 B IT1181059 B IT 1181059B IT 42909/84 A IT42909/84 A IT 42909/84A IT 4290984 A IT4290984 A IT 4290984A IT 1181059 B IT1181059 B IT 1181059B
Authority
IT
Italy
Prior art keywords
block
data
digitised
communication link
printed circuit
Prior art date
Application number
IT42909/84A
Other languages
Italian (it)
Other versions
IT8442909A0 (en
IT8442909A1 (en
Inventor
Pierluigi Terni
Original Assignee
Pierluigi Terni
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 Pierluigi Terni filed Critical Pierluigi Terni
Priority to IT42909/84A priority Critical patent/IT1181059B/en
Publication of IT8442909A0 publication Critical patent/IT8442909A0/en
Publication of IT8442909A1 publication Critical patent/IT8442909A1/en
Application granted granted Critical
Publication of IT1181059B publication Critical patent/IT1181059B/en

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Landscapes

  • Time-Division Multiplex Systems (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.
IT42909/84A 1984-07-04 1984-07-04 Printed circuit prodn. IT1181059B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT42909/84A IT1181059B (en) 1984-07-04 1984-07-04 Printed circuit prodn.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT42909/84A IT1181059B (en) 1984-07-04 1984-07-04 Printed circuit prodn.

Publications (3)

Publication Number Publication Date
IT8442909A0 IT8442909A0 (en) 1984-07-04
IT8442909A1 IT8442909A1 (en) 1986-01-04
IT1181059B true IT1181059B (en) 1987-09-23

Family

ID=11254624

Family Applications (1)

Application Number Title Priority Date Filing Date
IT42909/84A IT1181059B (en) 1984-07-04 1984-07-04 Printed circuit prodn.

Country Status (1)

Country Link
IT (1) IT1181059B (en)

Also Published As

Publication number Publication date
IT8442909A0 (en) 1984-07-04
IT8442909A1 (en) 1986-01-04

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