Television signal transmission system with carrier offset...

H - Electricity – 04 – N

Patent

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Details

H04N 5/38 (2006.01) H04N 5/44 (2006.01) H04N 7/08 (2006.01) H04N 7/24 (2006.01) H04N 7/13 (1990.01)

Patent

CA 2082654

ABSTRACT OF THE DISCLOSURE A television signal transmission system is used for transmitting an N-level video related data signal. The data signal is processed prior to transmission such that the majority of N-level symbols comprises a non-negative level for facilitating receiver lock-up. An in-phase pilot component may be added to the transmission by D.C. offsetting the processed signal to further facilitate the receiver lock- up. The processed signal is precoded by a modulo-N filter and postcoded by a complementary linear filter in the receiver to reduce interfering NTSC components. In the absence of interfering NTSC components, a complementary modulo-N postcoding filter may be used in the receiver to provide improved signal to noise performance.

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