Method and system for adaptive transmission of smoothed data over wireless channels
AssigneeAT&T Intellectual Property II, L.P.
InventorsZhimei Jiang, Leonard Kleinrock
Life of this patent
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Abstract
A method and system that reduces the impact of packet loss on video data quality. Packet selection is performed by the method and system to selectively drop low priority packets so that the overall quality of the received video data may be improved. In one exemplary embodiment, the probability of higher priority layers being delivered on time is computed and a packet is transmitted only if this probability is greater than a given threshold h. In another exemplary embodiment, the system and method have the capability of backing up the process to transmit previously skipped packets, if time allows.
Claims20
A method of transmitting data packets comprising:
- identifying a priority of each packet of a plurality of packets to be transmitted;
- selectively transmitting higher priority packets before transmitting lower priority packets of the plurality of packets;
- receiving the transmitted packets;
- smoothing the received data packets;
- and
- playing-out the smoothed packets,
- wherein, the step of selectively transmitting is performed by calculating a probability of higher priority packets being delivered prior to play-out times for the higher priority packets and transmitting a packet only if this probability is greater than a set threshold.
A system for data packet transmission, the system comprising:
- a central transmission unit including a unit controller coupled to a unit buffer and a unit transceiver, the unit buffer also being coupled to the unit transceiver, the unit buffer storing a plurality of data packets for selective transmission by the unit transceiver;
- a transmission channel that carries the plurality of data packets transmitted by the unit transceiver,
- wherein, the unit controller controls selective transmission of the plurality of data packets from the unit transceiver along the transmission channel to client equipment.
Dependencies are inferred from the claim text.