发明名称 |
Television standard discriminating apparatus. |
摘要 |
<p>A television signal kind discriminating apparatus which can discriminate an input television signal in a short time between a MUSE signal having a three-value type horizontal synchronizing signal and a popular television signal such as an NTSC signal having a horizontal synchronizing signal consisting only of signals of a single polarity is disclosed. An input television signal is converted into a binary signal by a level comparator using a level between first and second polarity signal portions of the horizontal synchronizing signal of the MUSE signal, and the binary signal is delayed by a predetermined time by a delay circuit. An exclusive OR signal between the binary signal not delayed and the binary signal delayed is outputted from a gate, and a temporal position of a mid point of the horizontal synchronizing signal of the input television signal is detected by a detector. Whether the input television signal is a MUSE signal or a popular television signal is discriminated based on the exclusive OR signal within the predetermined time after the thus detected temporal position of the mid point of the horizontal synchronizing signal. <IMAGE></p> |
申请公布号 |
EP0561570(A2) |
申请公布日期 |
1993.09.22 |
申请号 |
EP19930301897 |
申请日期 |
1993.03.12 |
申请人 |
SONY CORPORATION |
发明人 |
KAWASHIMA, HIROYUKI;OKUMURA, YUJI |
分类号 |
H04N5/04;H04N5/46;H04N7/015 |
主分类号 |
H04N5/04 |
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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