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
  • 申请号: US12759673
    申请日: 2010-04-13
  • 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
Dual burst locked oscillator architecture for an analog television receiver
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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