H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/37, 350/48,
H04N 3/00 (2006.01) H04N 5/956 (2006.01)
Patent
CA 1134022
APHN 8741 25.8.77 ABSTRACT: In a circuit arrangement for the digital correction of time base errors in a television signal this signal is converted into digital television sig- nals with a certain clock frequency in an analog/ digital converter, which signals are consecutively written into the individual addresses of a random access memory (RAM) with the same clock frequency and in the meantime are read from specific addres- ses of the memory with the game frequency. Which addresses are read depends on the magnitude and sign of the time base error, which is determined in a detection circuit from a comparison signal of the television signal and is converted into digital time base error signals which are quantized with a given time interval, which error signals are applied to all address signal which depending on the number of time intervals, which are defined by the clock frequency in the time base error signals relative to the number of addresses of the memory controls the selection of the addresses to be read. - 31 -
297153
Grove A. Leonard
N.v. Philips Gloeilampenfabrieken
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