Method of increasing the dynamic range and reducing quantization noise of video signals

Claim 1

Method of minimizing video quantization noise in digitalized composite televison signals in which synchronizing signals appear interposed in blanking intervals between television-line picture signals said television line picture signals occupying a predetermined range of values available for them, and said synchronizing signals including discrete synchronization pulses and wave bursts of a synchronization frequency, including the steps of: providing from a tabular memory containing stored data representing a digital discrete synchronization pulse and a digital synchronizing frequency wave burst, in response to a television blanking signal representing said blanking intervals, said stored data representing said digital discrete pulse and said digital wave burst occupying the same range of values as said television-line picture signals and said stored data being provided within each of said blanking intervals from said memory in synchronized sequence corresponding to the sequence of said pulses and bursts of said synchronizing signals, and substituting, by a switching operation during said blanking intervals, said stored data representing said digital synchronization pulse and said digital wave burst provided from said memory for the synchronization pulses and the waves bursts of said digitalized composite television signals, whereby digitalized modified composite signals are produced comprising said television-line signals and said stored data provided from said memory occupying said same range of values.