Data transmission in non-reliable networks

Details Data transmission in non-reliable networks Data transmission in non-reliable networks

2006-05-23

2006-05-23

Srivastava, Vivek (Department: 2617)

Interactive video distribution systems

Video distribution system with upstream communication

Server or headend

C725S116000, C725S131000, C375S240260, C375S240270

Reexamination Certificate

active

07051358

ABSTRACT:
The present invention relates to a method and apparatus for transmitting video and/or audio data in a non-reliable and bandlimited network from a server to a client. The network may for instance be a wireless network. The data stream includes P-frames and I-frames. If during transmission a frame gets lost, the client notifies the server of the data loss when the next packet is received at the client correctly. The server then skips all the P-frames of the current P-frame sequence and continues the transmission with the next I-frame. Preferably, each packet has assigned a sequence number and the message from the client includes the sequence number of the currently received packet. The server may ignore a message from the client if the client's request for skipping the P-frames has already been executed. It is preferred to make use of the present invention for streaming MPEG data.

REFERENCES:
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patent: 5784527 (1998-07-01), Ort
patent: 5974028 (1999-10-01), Ramakrishnan
patent: 10-262256 (1998-09-01), None
S. Fukunaga et al., “Error Resilient Video Coding by Dynamic Replacing of Reference Pictures”, Global Telecommunications Conference (Globecom), US, New York, IEEE, Nov. 18, 1996, pp. 1503-1508, XP000748704 ISBN: 0-7803-3337-3.
Shigeru Fukunaga et al., “Error Resilient Video Coding by Dynamic Replacing of Reference Pictures”, Nov. 18, 1996, pp. 1503-1508.
T. Chujoh et al., “Error-Resilient Techniques for MPEG-4”, Toshiba Review, vol. 57, No. 6, 2002, pp. 6-9 along with Partial English Translation.

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