FR1402275A - Système de transmission numérique de fac-similé - Google Patents
Système de transmission numérique de fac-similéInfo
- Publication number
- FR1402275A FR1402275A FR981000A FR981000A FR1402275A FR 1402275 A FR1402275 A FR 1402275A FR 981000 A FR981000 A FR 981000A FR 981000 A FR981000 A FR 981000A FR 1402275 A FR1402275 A FR 1402275A
- Authority
- FR
- France
- Prior art keywords
- transmission system
- facsimile transmission
- digital facsimile
- digital
- transmission
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
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
- H04N1/41—Bandwidth or redundancy reduction
- H04N1/4105—Bandwidth or redundancy reduction for halftone screened pictures
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
-
- 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
- H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
- H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR981000A FR1402275A (fr) | 1963-07-24 | 1964-07-07 | Système de transmission numérique de fac-similé |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US297454A US3294896A (en) | 1963-07-24 | 1963-07-24 | Digital encoder for facsimile transmission |
FR981000A FR1402275A (fr) | 1963-07-24 | 1964-07-07 | Système de transmission numérique de fac-similé |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1402275A true FR1402275A (fr) | 1965-06-11 |
Family
ID=26208761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR981000A Expired FR1402275A (fr) | 1963-07-24 | 1964-07-07 | Système de transmission numérique de fac-similé |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR1402275A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2591779A1 (fr) * | 1985-11-29 | 1987-06-19 | Ricoh Kk | Appareil de traitement de donnees de gradation |
-
1964
- 1964-07-07 FR FR981000A patent/FR1402275A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2591779A1 (fr) * | 1985-11-29 | 1987-06-19 | Ricoh Kk | Appareil de traitement de donnees de gradation |
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