发明名称 |
Television receiver capable of enlarging and compressing image. |
摘要 |
To provide an image which is matched with an aspect ratio of a screen of a display unit by compressing and enlarging the whole of the image to a desired size. A video signal is sequentially written into a field memory in response to a write clock from an input terminal (118). A clock generating circuit (119) supplies the field memory (103) with a read clock having a frequency which is about 4/3 times as high as that of the write clock. A vertical enlargement control circuit (110) reads a video signal from the field memory (103) with a line period corresponding to a magnification factor and inhibits writing to a one-line memory (105) with the same period to provide a line delayed output for an output signal from the field memory (13). A vertical interpolating circuit (106) generates a scanning line signal by an interpolation operation in accordance with a control signal from the vertical enlargement control circuit (110). <IMAGE> |
申请公布号 |
EP0630154(A3) |
申请公布日期 |
1995.04.12 |
申请号 |
EP19940109332 |
申请日期 |
1994.06.16 |
申请人 |
HITACHI LTD |
发明人 |
KATSUMATA KENJI;HIRAHATA SHIGERU;MURATA TOSHINORI;TAKATA HARUKI;TORIKOSHI SHINOBU;EDA TAKANORI;ISHIBASHI KOUICHI |
分类号 |
H04N5/262;H04N3/27;H04N5/46;H04N7/01 |
主分类号 |
H04N5/262 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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