| 摘要 |
A reference voltage is cyclically varied within a range of dark and bright television picture signals. Binary one signals are produced when an instantaneous picture brightness signal voltage is higher, i.e. brighter, than the instantaneous level of the cyclically varied reference voltage. Zeros indicate that the instantaneous value of the television signal is below the corresponding instantaneous level of the reference voltage. The binary signals are amplified when necessary, and are stored or transmitted to a receiver. The binary inputs are used directly in a conventional receiver, permitting the eye to integrate closely adjacent signals to distinguish levels of brightness.
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