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
Links
- -1 Carboxy-chromonyl Chemical group 0.000 title 2
- 150000003839 salts 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 |
|---|---|---|---|
| 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) |
-
1985
- 1985-05-03 IT IT48032/85A patent/IT1181895B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IT8548032A0 (en) | 1985-05-03 |
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