Abstract: A communication system transmitter comprises an adaptive error correction encoder. The adaptive error correction encoder is configured to generate a plurality of error correction frames with each such error correction frame comprising a plurality of data packets and one or more error correction packets. A given one of the error correction packets comprises information relating to the plurality of data packets of its corresponding frame and additional information relating to a different one of the error correction frames. The additional information may be inserted into a header of the given error correction packet, and may comprise a next frame sequence number indicator and a corresponding next frame mask value for a subsequent one of the error correction frames. Other aspects of the invention relate to a communication system receiver comprising an adaptive FEC decoder, adaptive FEC encoding and decoding methods, integrated circuits, and associated computer program products.

Abstract: In one embodiment, a receiver for a frame of media packets employing the real-time transmission protocol (RTP) and forward error correction (FEC) is disclosed. The receiver comprises a packet buffer and an FEC decoder. After a packet is received by the packet buffer, the FEC decoder reads the packet and, as part of FEC processing, performs an XOR operation on the packet, without waiting for the entire frame (or, indeed, for any subsequent packet of the frame) to be received. The XOR operation results are accumulated until sufficient packets are received to reconstruct a missing packet in the frame. Because the XOR operations are performed immediately after a packet is received, without any delay from waiting for subsequent packets, the receiver has a very low latency, and the packet buffer may be relatively small.

Abstract: In one aspect, a communication system transmitter comprises an adaptive error correction encoder. The adaptive error correction encoder is configured to generate a plurality of error correction frames with each such error correction frame comprising a plurality of data packets and one or more error correction packets. A given one of the error correction packets comprises information relating to the plurality of data packets of its corresponding frame and additional information relating to a different one of the error correction frames. For example, the additional information relating to the different one of the error correction frames may be inserted into a header of the given error correction packet, and may comprise a next frame sequence number indicator and a corresponding next frame mask value for a subsequent one of the error correction frames.

Abstract: An attacker is prevented from obtaining information about the configuration of a computer system. Each of one or more revealing content elements that may be found in outgoing data transmitted by the computer system and that are capable of being used by the attacker to obtain the information about the configuration of the computer system is associated with one or more respective replacement content elements. Outgoing data to be transmitted by the computer system are then scanned for these one or more revealing content elements. A revealing content element found in the outgoing data is replaced by a replacement content element from the one or more replacement content elements associated with that revealing content element. This is done before the outgoing data is transmitted.

Abstract: A method and system for reducing channel changing time in multicast media, that can include the steps of receiving at least one of a plurality of available channels from a service provider at a residential gateway through a network, ranking the popularity of at least one of the available channels at a ranking engine connected to the residential gateway, and requesting to receive a number of the channels available from the service provider at the residential gateway based on the ranking. The rank is at least partly based on the data stored in the database.

Abstract: In one embodiment, a receiver for a frame of media packets employing the real-time transmission protocol (RTP) and forward error correction (FEC) is disclosed. The receiver comprises a packet buffer and an FEC decoder. After a packet is received by the packet buffer, the FEC decoder reads the packet and, as part of FEC processing, performs an XOR operation on the packet, without waiting for the entire frame (or, indeed, for any subsequent packet of the frame) to be received. The XOR operation results are accumulated until sufficient packets are received to reconstruct a missing packet in the frame. Because the XOR operations are performed immediately after a packet is received, without any delay from waiting for subsequent packets, the receiver has a very low latency, and the packet buffer may be relatively small.

Abstract: A method and system for reducing channel changing time in multicast media, that can include the steps of receiving at least one of a plurality of available channels from a service provider at a residential gateway through a network, ranking the popularity of at least one of the available channels at a ranking engine connected to the residential gateway, and requesting to receive a number of the channels available from the service provider at the residential gateway based on the ranking. The rank is at least partly based on the data stored in the database.

Abstract: An attacker is prevented from obtaining information about the configuration of a computer system. Each of one or more revealing content elements that may be found in outgoing data transmitted by the computer system and that are capable of being used by the attacker to obtain the information about the configuration of the computer system is associated with one or more respective replacement content elements. Outgoing data to be transmitted by the computer system are then scanned for these one or more revealing content elements. A revealing content element found in the outgoing data is replaced by a replacement content element from the one or more replacement content elements associated with that revealing content element. This is done before the outgoing data is transmitted.