H - Electricity – 04 – L
Patent
H - Electricity
04
L
354/222, 350/3,
H04L 1/00 (2006.01) G11B 20/18 (2006.01) H04N 5/782 (2006.01) H04N 5/92 (2006.01) H04N 5/926 (2006.01) H04N 5/93 (2006.01) H04N 9/888 (2006.01)
Patent
CA 1170738
38SO1482 S81P218 DIGITAL SIGNAL PROCESSING METHOD AND APPARATUS ABSTRACT OF THE DISCLOSURE An identification signal is generated to identify a digital signal, such as a digital video signal reproduced by a digital video tape recorder (DVTR), as odd or even. Commencing periodically, such as at the onset of each field interval, identification signals occurring at inter- vals in the digital signal are sampled, and an odd plu- rality (e.g., three) thereof determined to be error-free are stored. A synthetic identification signal is generated whose value is determined by the majority of the stored identification signals. The generated signal is then stored, for example, in a cascade of flip-flops, to provide a second synthetic identification signal from the onset of each field interval until the majority of the sampled identification signals is determined. In a circuit for processing a digital video signal, an identification signal for identifying line intervals as even or odd is derived by taking the modulo-two sum of field and frame identifi- cation signals to determine the state of the line identifi- cation signal at the beginning of each field, and thereafter inverting the identification signal at each line interval.
388328
Gowling Lafleur Henderson Llp
Sony Corporation
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