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
Links
- -1 Arene carboxylic acids Chemical class 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 abstract 1
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.
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) |
-
1985
- 1985-05-06 IT IT48042/85A patent/IT1181654B/en active
Also Published As
Publication number | Publication date |
---|---|
IT8548042A0 (en) | 1985-05-06 |
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