Packet filtering
OwnerDominique Hamery, Lionel Tranchard +1inventors
InventorsDominique Hamery, Lionel Tranchard, Christophe Declerck
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Abstract
A method of filtering a packet data stream as transmitted in a digital audiovisual transmission system characterized in that transport packet data is filtered at a first stage by a digital filter according to the characteristics of the transport packet header, selected filtered data being then passed directly to a memory element within the receiver/decoder. In a second aspect, the method comprises filtering a packet data stream characterized in that transport packet data is filtered at a first stage by a first digital filter according to the characteristics of the transport packet header, selected filtered data from the paload corresponding to a continuous flux of data then being passed to a second digital filter for a second stage of filtering.
Claims8
A method of filtering a stream of transport data packets transmitted in a digital audiovisual transmission system, comprising:
- a step of extracting from the stream of transport data packets a first particular stream of data packets by a first digital filter based on predetermined information in a transport packet header, wherein thereby the first particular stream of data packets comprises a continuous flux of data in which data packets of the first particular stream of data packets each comprise a first packet header and a first payload, wherein the first payload comprises a second packet header and a second payload;
- and
- a step of extracting from the first particular stream of data packets a second particular stream of data packets by a second digital filter based on predetermined information in the second packet headers,
- wherein the first particular stream of data packets is directly passed from the first digital filter to the second digital filter.
A receiver for receiving data transmitted in an audiovisual transmission system, comprising:
- a first digital filter arranged to extract a first set of particular data packets from a plurality of data packets in an input data stream based on predetermined information in headers of the plurality of data packets;
- a second digital filter arranged to extract a second set of particular data packets from the first set of particular data packets based on predetermined information in data packets in the first set of particular data packets, wherein the first set of particular data packets is directly passed from the first digital filter to the second digital filter;
- and
- at least one memory element arranged to store the second set of particular data packets.
Dependencies are inferred from the claim text.