JPS56144677A - Multiple-screen television receiver - Google Patents
Multiple-screen television receiverInfo
- Publication number
- JPS56144677A JPS56144677A JP4690480A JP4690480A JPS56144677A JP S56144677 A JPS56144677 A JP S56144677A JP 4690480 A JP4690480 A JP 4690480A JP 4690480 A JP4690480 A JP 4690480A JP S56144677 A JPS56144677 A JP S56144677A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- screen
- sampling
- memory
- subordinate
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To prevent picture quality from deterioration even when the number of sampling points and required memory capacity are reduced, by making sampling points different between two scanning lines. CONSTITUTION:Flip-flops 46A and 46B are inverted in logic level on every sampling scanning line to output the control signal of changeover switch level is ''1'' or a phase-inverted writing clock signal when ''0'', thereby controlling changeover switches 45A and 45B. Changeover switches 45A and 45B switch two kinds of 180 deg. out-of-phase signal on every sampling scanning line and input them to memory 41. The picture signal of a subordinate screen is stored in memory 41 and then inserted into a master screen signal by subordinate-screen inserting circuit 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4690480A JPS56144677A (en) | 1980-04-11 | 1980-04-11 | Multiple-screen television receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4690480A JPS56144677A (en) | 1980-04-11 | 1980-04-11 | Multiple-screen television receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56144677A true JPS56144677A (en) | 1981-11-11 |
Family
ID=12760337
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4690480A Pending JPS56144677A (en) | 1980-04-11 | 1980-04-11 | Multiple-screen television receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56144677A (en) |
-
1980
- 1980-04-11 JP JP4690480A patent/JPS56144677A/en active Pending
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