发明授权
- 专利标题: Impulse noise detection circuit for TV signals
- 专利标题(中): 电视信号的脉冲噪声检测电路
-
申请号: US275711申请日: 1981-06-22
-
公开(公告)号: US4398210A公开(公告)日: 1983-08-09
- 发明人: Frank C. Liu , Yih-Sien Kao
- 申请人: Frank C. Liu , Yih-Sien Kao
- 申请人地址: NY New York
- 专利权人: RCA Corporation
- 当前专利权人: RCA Corporation
- 当前专利权人地址: NY New York
- 主分类号: H04N5/213
- IPC分类号: H04N5/213 ; H04N5/21 ; H04N9/535
摘要:
Impulse noise detection circuitry for determining the occurrence of short noise pulses in TV video signal includes two 1H delay lines to align successive image lines for signal comparison. The amplitude of signal from one image line is compared with the signal amplitude of a succeeding and a preceding image line along a vertical line. If the amplitude of the one signal concurrently exceeds the signal of both the preceding and the succeeding image lines, then a control signal, indicative of the presence of impulse noise, is produced.
公开/授权文献
- US6121767A Digital multimeter with variable color range indication 公开/授权日:2000-09-19