发明名称 |
Reduction of visibility of spurious signals in video |
摘要 |
A system and method for altering the appearance of interference in a video signal caused by spurious interference generated by repeated high speed digital memory write operations affecting video processing in analog circuitry in thereceiver. In one particular embodiment, a picture-in-picture television receiver is provided wherein both the main and sub-pictures are processed on a single IC including analog processing circuitry, as well as a small picture memory array to which small picture video samples are repeatedly being written. The visibility of spurious interference in the picture is reduced by periodically altering the clock timing during the repetitive high speed writing operation to redistribute the interference so as to be less noticeable to the television viewer.
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申请公布号 |
US5982453(A) |
申请公布日期 |
1999.11.09 |
申请号 |
US19960719926 |
申请日期 |
1996.09.25 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
WILLIS, DONALD HENRY |
分类号 |
H04N5/21;H04N5/45;H04N5/775;(IPC1-7):H04N5/911 |
主分类号 |
H04N5/21 |
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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