发明名称 |
TELEVISION SIGNAL DATA TRANSMISSION SYSTEM |
摘要 |
A television signal data transmission system comprises means for transmitting a television signal in which the phase of the RF carrier is modified during a periodically recurring interval by a SAW filter having a varying phase response between the video and audio carrier frequencies of the signal. The periodically recurring interval is modulated between a first width and a second smaller width respectively representing complementary logic states of a data bit. The first width of the width modulated interval preferably extends between two points respectively located within the non-viewable, overscan portions of the video signal immediately adjacent and on either side of a horizontal blanking interval of the television signal. The transmitted signal is received by a decoder which includes a phase modulation detector for detecting the width modulated intervals and a pulse width discriminator responsive thereto for deriving the data bits. |
申请公布号 |
CA1281409(C) |
申请公布日期 |
1991.03.12 |
申请号 |
CA19860503952 |
申请日期 |
1986.03.12 |
申请人 |
ZENITH ELECTRONICS CORPORATION |
发明人 |
CITTA, RICHARD W.;MUTZABAUGH, DENNIS M.;SGRIGNOLI, GARY J. |
分类号 |
H04N7/171 |
主分类号 |
H04N7/171 |
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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