发明授权
US08305492B2 Dual burst locked oscillator architecture for an analog television receiver
有权
用于模拟电视接收机的双脉冲锁定振荡器架构
- 专利标题: Dual burst locked oscillator architecture for an analog television receiver
- 专利标题(中): 用于模拟电视接收机的双脉冲锁定振荡器架构
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申请号: US12759673申请日: 2010-04-13
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公开(公告)号: US08305492B2公开(公告)日: 2012-11-06
- 发明人: Yongru Gu
- 申请人: Yongru Gu
- 申请人地址: US CA Lake Forest
- 专利权人: Newport Media, Inc.
- 当前专利权人: Newport Media, Inc.
- 当前专利权人地址: US CA Lake Forest
- 代理机构: Rahman LLC
- 主分类号: H04N9/45
- IPC分类号: H04N9/45
摘要:
Color information decoding on a composite video signal that includes modulated color information for an analog television receiver. A first burst locked oscillator (BLO) operates in a first loop gain, and a second BLO operates in second loop gain and is operatively connected to the first BLO. The first loop gain is higher than the second loop gain. A method includes receiving, in a first burst accumulator, mixed down color information directly from a first phase detector without filtering the mixed down color information, converting the composite video signal to a burst gate signal, accumulating one or more of the burst gate signal, and calculating a frequency offset for the second BLO in the first BLO expedite the calculating of the frequency offset and to compensate for the second BLO operating in the second loop gain.
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