Single oscillator compressed digital information receiver

A receiver for demodulating a packetized input signal containing encoded timing information, comprising:

• a free running oscillator for producing an asynchronous sampling signal;
• digitizing means, connected to said free running oscillator, for digitizing the packetized input signal using the asynchronous sampling signal;
• interpolating means, connected to said digitizing means, for interpolating said digitized signal to produce an interpolated signal;
• a first timing loop, connected to said interpolating means, for synchronizing the interpolating means whereby symbols within the digitized signal are optimally interpolated;
• a demodulator, connected to said interpolating means, for demodulating the interpolated signal to produce a baseband signal;
• a transport decoder, connected to said demodulator, for extracting the encoded timing information from said baseband signal;
• a transport timing loop, connected to said transport decoder, for synchronizing a numerically controlled counter to the extracted timing information;
• decoder means, connected to said transport decoder and said numerically controlled counter, for decoding information contained in said baseband signal to generate a decoded signal;
• and
• an output interpolator, connected to decoder means and said numerically controlled oscillator, for interpolating said decoded signal to generate a continuous output signal.

A method of synchronizing a receiver and transmitter, where the transmitted signal is a packetized digital signal having transmitter timing information contained in periodically transmitted packets, said method comprising the steps of:

• digitizing said packetized digital signal to produce a digitized signal using a sampling signal from an oscillator;
• interpolating said digitized signal to produce an interpolated signal;
• processing said interpolated signal to synchronize said interpolation;
• extracting said transmitter timing information from said packets;
• initializing a counter with an initial count value equivalent to a transmitter count value contain in said timing information;
• counting, said sampling signal, from the initial value to produce a local count value;
• adjusting the local count value to compensate for burstiness in said interpolated signal;
• comparing said adjusted local count value to said transmitter count value in subsequently received packets containing transmitter timing information;
• producing an oscillator control signal in response to the comparison of the adjusted local count value and the transmitter count value;
• and
• controlling said oscillator with said control signal whereby said receiver is synchronized with said transmitter.

A method of synchronizing a receiver and transmitter, where the transmitted signal is a packetized digital signal having transmitter timing information contained in periodically transmitted packets, said method comprising the steps of:

• digitizing said packetized digital signal to produce a digitized signal using an asynchronous sampling signal from a free running oscillator;
• interpolating said digitized signal to produce an interpolated signal;
• processing said interpolated signal to synchronize said interpolation;
• extracting said transmitter timing information from said packets;
• counting, said sampling signal, with a numerically controlled counter to produce a local count value;
• adjusting the local count value to compensate for burstiness in said interpolated signal by applying a control signal to the numerically controlled counter;
• comparing said adjusted local count value to said transmitter count value in received packets containing timing information;
• producing a numerically controlled counter control signal in response to the comparison of the adjusted local count value and the transmitter count value;
• and
• controlling said numerically controlled counter with said control signal whereby said receiver is synchronized with said transmitter.