发明授权
US07586544B2 Method and apparatus for testing lip-sync of digital television receiver
失效
用于测试数字电视接收机的唇同步的方法和装置
- 专利标题: Method and apparatus for testing lip-sync of digital television receiver
- 专利标题(中): 用于测试数字电视接收机的唇同步的方法和装置
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申请号: US10565106申请日: 2004-07-01
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公开(公告)号: US07586544B2公开(公告)日: 2009-09-08
- 发明人: Chan-Ho Han , Jong Sik Kim
- 申请人: Chan-Ho Han , Jong Sik Kim
- 申请人地址: KR Seoul
- 专利权人: LG Electronics Inc.
- 当前专利权人: LG Electronics Inc.
- 当前专利权人地址: KR Seoul
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: KR10-2003-0044233 20030701
- 国际申请: PCT/KR2004/001616 WO 20040701
- 国际公布: WO2005/004470 WO 20050113
- 主分类号: H04N17/02
- IPC分类号: H04N17/02 ; H04N9/475
摘要:
A lip synchronization test method for DTV receivers. The method includes the steps of: generating a digital audio stream having a frame index inserted therein and a video stream having a Transient Effect Area Test Signal (TATS) inserted therein; comparing the waveform of the time-indexed audio signal with that of the time-indexed video signal; and measuring and calculating a time difference dt between the audio and video signals based upon the time indexes of the time-indexed audio and video signals.
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