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US 6,151,479 AGranted
Single clock 27 MHZ oscillator in MPEG-2 system
AssigneeEchoStar Engineering Corp.
InventorDavid A. Kummer
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AssigneeEchoStar Engineering Corp.
InventorDavid A. Kummer
Estimating the term…
This invention provides a method of generating multiple frequencies for use in a digital data transmission system including a remote transmitter and receiver. The reference frequency used in the transmitter is replicated in a remote receiver. A single crystal oscillator is used to generate a reference frequency similar to that used in the transmitter. The receiver reference frequency is manipulated by dividing the frequency into required multiple frequencies for use within the receiver. A constant comparison is made between the clock signal received in the transmitted data stream with the receiver reference frequency and the divisors are adjusted accordingly to maintain the clock frequency in the receiver within a predetermined tolerance range. This allows the output signal for display from the receiver to match the quality of the input display provided to the transmitter.
A method of generating multiple frequencies from a single crystal oscillator in a video and audio satellite transmission system, said satellite transmission system including an uplink transmitter for providing a reference frequency for the encoding of the digital video and audio data stream and a receiver for the decoding of said data stream for display on a television set or monitor, the method comprising the steps of:
A method of generating multiple frequencies in an MPEG data transmission system having a transmitter and receiver for transferring an encoded digital data stream for the transmission and utilization of data;
Dependencies are inferred from the claim text.