JPS54146920A - Interlace scanning method and its unit - Google Patents
Interlace scanning method and its unitInfo
- Publication number
- JPS54146920A JPS54146920A JP5453878A JP5453878A JPS54146920A JP S54146920 A JPS54146920 A JP S54146920A JP 5453878 A JP5453878 A JP 5453878A JP 5453878 A JP5453878 A JP 5453878A JP S54146920 A JPS54146920 A JP S54146920A
- Authority
- JP
- Japan
- Prior art keywords
- field
- scanning
- period
- interlace
- unit
- 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.)
- Pending
Links
Abstract
PURPOSE: To obtain a desired interlace ratio by selecting the period of vertical scanning for every field and changing the period of vertical scanning of required fields.
CONSTITUTION: In case that 3:1 interlace scanning is obtained, individual vertical scanning driving signals are given to the first field L1, the second field L2 and the third field L3. For example, the first field period T4, the second field period T5 and the third field period T6 are made 10/3 times, 10/3 times and 7/3 times as long as horizontal scanning period H respectively, so that 3:1 interlace scanning can be obtained. Vertical scanning driving signals are obtained by shifting scanning pulses 6' successively by 1/3H and 2/3H in the first field and the second field respectively. That is, desired scanning pulses corresponding to scanning times of respective fields are generated from one pulse and are used for every field.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5453878A JPS54146920A (en) | 1978-05-10 | 1978-05-10 | Interlace scanning method and its unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5453878A JPS54146920A (en) | 1978-05-10 | 1978-05-10 | Interlace scanning method and its unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54146920A true JPS54146920A (en) | 1979-11-16 |
Family
ID=12973435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5453878A Pending JPS54146920A (en) | 1978-05-10 | 1978-05-10 | Interlace scanning method and its unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54146920A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5616377A (en) * | 1979-07-11 | 1981-02-17 | Philips Nv | Interlace ratio switching television circuit |
-
1978
- 1978-05-10 JP JP5453878A patent/JPS54146920A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5616377A (en) * | 1979-07-11 | 1981-02-17 | Philips Nv | Interlace ratio switching television circuit |
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