发明名称 |
television picture zoom system. |
摘要 |
<p>A digital video zoom system includes circuitry for writing (20) image samples into a memory (16) at a standard rate and for reading (22) samples from the memory at a reduced rate. Samples are read from the memory under control of a digital accumulator (22) which repeatedly adds a value N to a stored value, modulo M, to obtain a new stored value. Samples are read from the memory only when an overflow condition is detected in the accumulator. The four most significant bits of the value held by the accumulator are also used to develop interpolation factors which are used (28-34) to combine successive sample values provided by the memory to develop interpolated sample values which are used to produce the enlarged image. The image is increased in size by a factor of M/N relative to an unmagnified image.</p> |
申请公布号 |
EP0287333(A2) |
申请公布日期 |
1988.10.19 |
申请号 |
EP19880303283 |
申请日期 |
1988.04.12 |
申请人 |
RCA LICENSING CORPORATION |
发明人 |
SHIRATSUCHI, SHINICHI APARTMENT 402 |
分类号 |
H04N1/393;G06T3/40;H04N5/262;H04N5/44;H04N9/64;H04N9/74 |
主分类号 |
H04N1/393 |
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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