In a data extraction circuit used for reproducing character data such as a closed caption and a text, a horizontal sync digital PLL circuit generates an fh sync system clock signal, which is synchronized with a horizontal sync signal fh, in response to a digital video signal from an ADC. Based on the...http://www.google.fr/patents/US6462782?utm_source=gb-gplus-shareBrevet US6462782 - Data extraction circuit used for reproduction of character data
Data extraction circuit used for reproduction of character data
