NO781338L - Fremgangsmaate til aa bedre billedkvaliteten ved faksimile-overfoering - Google Patents
Fremgangsmaate til aa bedre billedkvaliteten ved faksimile-overfoeringInfo
- Publication number
- NO781338L NO781338L NO781338A NO781338A NO781338L NO 781338 L NO781338 L NO 781338L NO 781338 A NO781338 A NO 781338A NO 781338 A NO781338 A NO 781338A NO 781338 L NO781338 L NO 781338L
- Authority
- NO
- Norway
- Prior art keywords
- signal
- polarity
- image signal
- black
- white
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 22
- 230000005540 biological transmission Effects 0.000 title description 26
- 230000008859 change Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000004069 differentiation Effects 0.000 description 4
- 230000007306 turnover Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 206010067482 No adverse event Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002336 repolarization Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/40—Picture signal circuits
- H04N1/409—Edge or detail enhancement; Noise or error suppression
- H04N1/4092—Edge or detail enhancement
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/41—Bandwidth or redundancy reduction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Facsimile Scanning Arrangements (AREA)
- Solid State Image Pick-Up Elements (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2720079A DE2720079C3 (de) | 1977-05-05 | 1977-05-05 | Verfahren zur Verbesserung der Bildqualität bei der Faksimile-Übertragung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO781338L true NO781338L (no) | 1978-11-07 |
Family
ID=6008068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO781338A NO781338L (no) | 1977-05-05 | 1978-04-17 | Fremgangsmaate til aa bedre billedkvaliteten ved faksimile-overfoering |
Country Status (14)
| Country | Link |
|---|---|
| AT (1) | AT372561B (xx) |
| AU (1) | AU518941B2 (xx) |
| BE (1) | BE866727A (xx) |
| CH (1) | CH627317A5 (xx) |
| DE (1) | DE2720079C3 (xx) |
| DK (1) | DK191378A (xx) |
| FI (1) | FI781369A (xx) |
| FR (1) | FR2390056A1 (xx) |
| GB (1) | GB1604106A (xx) |
| IT (1) | IT1095722B (xx) |
| NL (1) | NL7804772A (xx) |
| NO (1) | NO781338L (xx) |
| SE (1) | SE7804769L (xx) |
| YU (1) | YU101778A (xx) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826755A1 (de) * | 1978-06-19 | 1979-12-20 | Hell Rudolf Dr Ing Gmbh | Abtasteinrichtung |
| US4589034A (en) * | 1980-12-05 | 1986-05-13 | Canon Kabushiki Kaisha | Image processing apparatus |
| DE3441152A1 (de) * | 1984-11-10 | 1986-05-28 | Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth | Verfahren zur magnetischen aufzeichnung und wiedergabe von telekommunikations-signalen, insbesondere von videotext- und/oder kabeltext-signalen |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3189685A (en) * | 1961-04-21 | 1965-06-15 | Philco Corp | Two-level quantization system |
| DE1268657B (de) * | 1965-07-14 | 1968-05-22 | Hell Rudolf Dr Ing Fa | Verfahren zur Steigerung der Schaerfe bei der Aufzeichnung der Reproduktionen lichtelektrisch abgetasteter Bildvorlagen |
| US3538246A (en) * | 1968-05-22 | 1970-11-03 | Southern Pacific Transport Co | Bandwidth reduction technique for analog signals |
| US3495032A (en) * | 1968-10-07 | 1970-02-10 | Graphic Transmission Systems I | Bandwidth reduction system |
| US3761610A (en) * | 1971-02-16 | 1973-09-25 | Graphics Sciences Inc | High speed fascimile systems |
| DE2114149C3 (de) * | 1971-03-24 | 1973-09-20 | Robert Bosch Fernsehanlagen Gmbh, 6100 Darmstadt | Amphtudendiskriminator fur eine Schaltungsanordnung zur Erzeugung eines Korrektursignals zur Flankenverstelle rung von Impulsen |
| US3795765A (en) * | 1971-12-29 | 1974-03-05 | Xerox Corp | Alternate analog encoding method and apparatus |
-
1977
- 1977-05-05 DE DE2720079A patent/DE2720079C3/de not_active Expired
-
1978
- 1978-04-07 CH CH375478A patent/CH627317A5/de not_active IP Right Cessation
- 1978-04-17 NO NO781338A patent/NO781338L/no unknown
- 1978-04-26 SE SE7804769A patent/SE7804769L/xx unknown
- 1978-04-27 AT AT0303978A patent/AT372561B/de not_active IP Right Cessation
- 1978-04-27 YU YU01017/78A patent/YU101778A/xx unknown
- 1978-05-03 NL NL7804772A patent/NL7804772A/xx not_active Application Discontinuation
- 1978-05-03 DK DK191378A patent/DK191378A/da not_active Application Discontinuation
- 1978-05-03 FR FR7813231A patent/FR2390056A1/fr not_active Withdrawn
- 1978-05-03 FI FI781369A patent/FI781369A/fi not_active Application Discontinuation
- 1978-05-03 IT IT22932/78A patent/IT1095722B/it active
- 1978-05-04 AU AU35770/78A patent/AU518941B2/en not_active Expired
- 1978-05-05 BE BE187411A patent/BE866727A/xx not_active IP Right Cessation
- 1978-05-05 GB GB18069/78A patent/GB1604106A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU518941B2 (en) | 1981-10-29 |
| FI781369A (fi) | 1978-11-06 |
| YU101778A (en) | 1982-08-31 |
| IT7822932A0 (it) | 1978-05-03 |
| AT372561B (de) | 1983-10-25 |
| NL7804772A (nl) | 1978-11-07 |
| DK191378A (da) | 1978-11-06 |
| IT1095722B (it) | 1985-08-17 |
| BE866727A (fr) | 1978-09-01 |
| DE2720079B2 (de) | 1981-01-22 |
| ATA303978A (de) | 1983-02-15 |
| CH627317A5 (en) | 1981-12-31 |
| SE7804769L (sv) | 1978-11-06 |
| DE2720079C3 (de) | 1981-11-05 |
| FR2390056A1 (xx) | 1978-12-01 |
| DE2720079A1 (de) | 1978-11-09 |
| AU3577078A (en) | 1979-11-08 |
| GB1604106A (en) | 1981-12-02 |
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