JPS5713812A - Digitization device - Google Patents

Digitization device

Info

Publication number
JPS5713812A
JPS5713812A JP8666680A JP8666680A JPS5713812A JP S5713812 A JPS5713812 A JP S5713812A JP 8666680 A JP8666680 A JP 8666680A JP 8666680 A JP8666680 A JP 8666680A JP S5713812 A JPS5713812 A JP S5713812A
Authority
JP
Japan
Prior art keywords
timing
shading waveform
digitization
slicing level
memory
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.)
Granted
Application number
JP8666680A
Other languages
Japanese (ja)
Other versions
JPS6214132B2 (en
Inventor
Mitsuharu Tadauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8666680A priority Critical patent/JPS5713812A/en
Publication of JPS5713812A publication Critical patent/JPS5713812A/en
Publication of JPS6214132B2 publication Critical patent/JPS6214132B2/ja
Granted legal-status Critical Current

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
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Abstract

PURPOSE:To achieve digitization at a precise slicing level, by making a difference in timing between the writing of a digitized shading waveform in a memory and the reading of it. CONSTITUTION:A gate generating circuit 6 and an AND gate AND are added. The address timing when a signal with a shading waveform (b) is converted into a digital signal and stored in a memory 2 and its reading timing are varied according to a start pulse ST. Consequently, a shading waveform (b1) resproduced by an A/D reverse converting circuit 4 coincides with the original shading waveform (b) in terms of timing. This shading waveform (b1) is voltage-divided to generate a slicing level (c) and a comparing circuit 5 performs digitization. Thus, the precise slicing level is generated and accurate digitization is achieved.
JP8666680A 1980-06-27 1980-06-27 Digitization device Granted JPS5713812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8666680A JPS5713812A (en) 1980-06-27 1980-06-27 Digitization device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8666680A JPS5713812A (en) 1980-06-27 1980-06-27 Digitization device

Publications (2)

Publication Number Publication Date
JPS5713812A true JPS5713812A (en) 1982-01-23
JPS6214132B2 JPS6214132B2 (en) 1987-03-31

Family

ID=13893351

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8666680A Granted JPS5713812A (en) 1980-06-27 1980-06-27 Digitization device

Country Status (1)

Country Link
JP (1) JPS5713812A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132066A (en) * 1975-05-13 1976-11-16 Mitsubishi Electric Corp A-d converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51132066A (en) * 1975-05-13 1976-11-16 Mitsubishi Electric Corp A-d converter

Also Published As

Publication number Publication date
JPS6214132B2 (en) 1987-03-31

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