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IT1181324B - Plastic air grating - Google Patents

Plastic air grating

Info

Publication number
IT1181324B
IT1181324B IT12032/84A IT1203284A IT1181324B IT 1181324 B IT1181324 B IT 1181324B IT 12032/84 A IT12032/84 A IT 12032/84A IT 1203284 A IT1203284 A IT 1203284A IT 1181324 B IT1181324 B IT 1181324B
Authority
IT
Italy
Prior art keywords
block
data
digitised
communication link
circuit
Prior art date
Application number
IT12032/84A
Other languages
Italian (it)
Other versions
IT8412032A0 (en
Inventor
Giuseppe Cervi
Original Assignee
Giuseppe Cervi
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 Giuseppe Cervi filed Critical Giuseppe Cervi
Priority to IT12032/84A priority Critical patent/IT1181324B/en
Publication of IT8412032A0 publication Critical patent/IT8412032A0/en
Application granted granted Critical
Publication of IT1181324B publication Critical patent/IT1181324B/en

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  • 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.
IT12032/84A 1984-10-24 1984-10-24 Plastic air grating IT1181324B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT12032/84A IT1181324B (en) 1984-10-24 1984-10-24 Plastic air grating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT12032/84A IT1181324B (en) 1984-10-24 1984-10-24 Plastic air grating

Publications (2)

Publication Number Publication Date
IT8412032A0 IT8412032A0 (en) 1984-10-24
IT1181324B true IT1181324B (en) 1987-09-23

Family

ID=11139378

Family Applications (1)

Application Number Title Priority Date Filing Date
IT12032/84A IT1181324B (en) 1984-10-24 1984-10-24 Plastic air grating

Country Status (1)

Country Link
IT (1) IT1181324B (en)

Also Published As

Publication number Publication date
IT8412032A0 (en) 1984-10-24

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Effective date: 19961030