Single sideband modulated chrominance information for compatible high-definition television

摘要: A television system having a fully compatible high-definition signal receivable at conventional resolution by TV receivers without auxiliary apparatus with one channel carrying the while high-frequency luminance and chrominance information is provided in second channel. The transmitted as two single sideband signals baseband containing components derived from lower output of product modulator whose inputs are taken an anti-alias filtered camera which produces wideband local oscillator frequency multiple subcarrier embedded signal. comprises Q' I' segments encoder circuit responsive to those initially encode each segment into pair double then suppress before transmission upper receiver. In addition, gates tone burst defining phase carrier vertical retrace interval. receiver represented first recreate missing multiplying twice thus producing sum-difference difference portion signals. After combining recreated signals, quadrature detection methods utilized recover portions information. uses generation phase.