JPS6451774A - Two-picture display device - Google Patents
Two-picture display deviceInfo
- Publication number
- JPS6451774A JPS6451774A JP20738687A JP20738687A JPS6451774A JP S6451774 A JPS6451774 A JP S6451774A JP 20738687 A JP20738687 A JP 20738687A JP 20738687 A JP20738687 A JP 20738687A JP S6451774 A JPS6451774 A JP S6451774A
- Authority
- JP
- Japan
- Prior art keywords
- scanning line
- reduction ratio
- field
- picture
- slave picture
- 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
Links
Landscapes
- Studio Circuits (AREA)
Abstract
PURPOSE:To obtain the excellent linearity of a slave picture in vertical direction by thinning out scanning lines in one side of either odd or even field of the slave picture, respectively by a ratio corresponding to a reduction ratio, when the reduction ratio is a reciprocal of an even number. CONSTITUTION:At the time of reducing to a reciprocal of an even number in the slave picture, the scanning line of every n=2k (here, k is integer) scanning line is extracted one by one every other field at an equal interval, and besides, the scanning line of every second extracted scanning line and the scanning line of every second other scanning line are stored in the different areas of a memory 10. The interlaced child picture is obtained by reading out these areas alternately by one field unit. Thus, the output signal of an n-frequency divider 3 is used for extracting the scanning line and distributing and storing it in the respective area, and the dividing phase of it is set by a phase control circuit 6 according to the output signal of a two-frequency divider 5. Besides, in a case that the reduction ratio is the fraction of one to the odd number, the scanning line is thinned out respectively in every field of the slave picture signal by the ratio corresponding to the reduction ratio.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20738687A JPH0748822B2 (en) | 1987-08-22 | 1987-08-22 | Dual screen display |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20738687A JPH0748822B2 (en) | 1987-08-22 | 1987-08-22 | Dual screen display |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6451774A true JPS6451774A (en) | 1989-02-28 |
JPH0748822B2 JPH0748822B2 (en) | 1995-05-24 |
Family
ID=16538876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20738687A Expired - Lifetime JPH0748822B2 (en) | 1987-08-22 | 1987-08-22 | Dual screen display |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0748822B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0318183A (en) * | 1989-06-15 | 1991-01-25 | Sharp Corp | Two-screen television receiver |
US5175624A (en) * | 1990-04-03 | 1992-12-29 | Canon Kabushiki Kaisha | Video system having image combining function |
US5936677A (en) * | 1997-09-12 | 1999-08-10 | Microsoft Corporation | Microbuffer used in synchronization of image data |
US6417889B1 (en) | 1997-12-02 | 2002-07-09 | Nec Corporation | Picture size conversion method and device thereof |
-
1987
- 1987-08-22 JP JP20738687A patent/JPH0748822B2/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0318183A (en) * | 1989-06-15 | 1991-01-25 | Sharp Corp | Two-screen television receiver |
US5175624A (en) * | 1990-04-03 | 1992-12-29 | Canon Kabushiki Kaisha | Video system having image combining function |
US5936677A (en) * | 1997-09-12 | 1999-08-10 | Microsoft Corporation | Microbuffer used in synchronization of image data |
US6417889B1 (en) | 1997-12-02 | 2002-07-09 | Nec Corporation | Picture size conversion method and device thereof |
Also Published As
Publication number | Publication date |
---|---|
JPH0748822B2 (en) | 1995-05-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term | ||
FPAY | Renewal fee payment (prs date is renewal date of database) |
Year of fee payment: 13 Free format text: PAYMENT UNTIL: 20080524 |