Digital broadcasting system and error correction method thereof
OwnerYang Liuinventor
Life of this patent
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Abstract
A digital broadcasting system comprising of a digital broadcasting station, a set of digital broadcast receivers, and a switched network, wherein the digital broadcasting station transmits a digital signal to the set of digital broadcast receivers, and the digital broadcast receivers exchange error correction information with each other using the network to compensate errors in local receptions of the digital signal at each digital broadcast receiver location.
Claims26
A digital broadcast receiver comprising:
- a demodulating circuit converting a received analog signal into a digital signal;
- a network interface controller communicating with one or more additional digital broadcast receivers;
- an error correction circuit coupled to the demodulating circuit, the error correction circuit generating a modified digital signal by identifying and correcting errors in the digital signal using parity data included in the digital signal;
- a buffer coupled to the error correction circuit for storing the modified digital signal;
- and
- a parity coding and decoding circuit coupled to the buffer and to the network interface controller, the parity coding and decoding circuit generating revised parity code blocks from the modified digital signal and generating a corrected digital signal by correcting errors in the modified digital signal using additional parity code blocks received from an additional digital broadcast receiver via the network interface controller.
A system for compensating independent bit errors encountered during a digital broadcast transmission, the system comprising:
- a local digital broadcast receiver generating a digital signal by demodulating an analog signal, the digital signal including errors, generating a modified digital signal including uncorrected errors using parity data included in the digital signal to correct a subset of the errors and transmitting a request for data correcting the uncorrected errors;
- a remote digital broadcast receiver communicatively coupled to the local digital broadcast receiver, the remote broadcast receiver demodulating the analog signal to generate a remote digital signal, generating remote parity data from the remote digital signal and communicating the remote parity data to the local digital broadcast receiver,
- wherein the local digital broadcast receiver corrects the uncorrected errors in the modified digital signal using the remote parity data.
A method for compensating independent bit errors encountered during a digital broadcast transmission, the method comprising the steps of:
- generating a digital signal from an analog signal, the digital signal including errors;
- generating a modified digital signal including uncorrected errors by correcting a subset of errors in the digital signal using parity data included in the digital signal;
- transmitting a request for additional error correction data to a remote digital broadcast receiver which also receives the analog signal;
- receiving remote parity data generated by the remote digital broadcast receiver from the analog signal;
- and
- generating a corrected digital signal by correcting the uncorrected errors in the modified digital signal using the remote parity data.
A system for intercepting a communication comprising:
- a local digital broadcast receiver receiving a broadcast communication, generating a digital signal by demodulating the broadcast communication, the digital signal including errors, generating a modified digital signal including uncorrected errors using parity data included in the broadcast communication to correct a subset of the errors and transmitting a request for data correcting the uncorrected errors;
- a remote digital broadcast receiver communicatively coupled to the local digital broadcast receiver and receiving the broadcast communication, the remote broadcast receiver demodulating the broadcast communication to generate a remote digital signal, generating remote parity data from the remote digital signal and communicating the remote parity data to the local digital broadcast receiver responsive to receiving the request for data correcting the uncorrected errors,
- wherein the local digital broadcast receiver corrects the uncorrected errors in the modified digital signal using the remote parity data.
Dependencies are inferred from the claim text.