Video data resending method
First Claim
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1. A data resending method, comprising:
- receiving a resend request message of data received in error, said resend request message including information identifying a storage area where the requested data is stored, said storage area including a copy of the requested data received in error and being divided according to variable-length codes such that an individual variable-length code can be accessed; and
sending the requested data with data to be currently sent, said sending step including multiplexing the requested data and the data to be currently sent.
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Abstract
A video data resending apparatus and method is disclosed. The present invention is capable of performing a selective resending process with respect to a local bit error of a previously sent video data packet, using a CONTRAXPAND™ buffer. The present invention has the effect of overcoming a time delay and overcoming sending suspension due to the resending of the video data. Also, the present invention can accurately block a distortion propagation to the adjacent video due to the local bit error.
25 Citations
30 Claims
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1. A data resending method, comprising:
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receiving a resend request message of data received in error, said resend request message including information identifying a storage area where the requested data is stored, said storage area including a copy of the requested data received in error and being divided according to variable-length codes such that an individual variable-length code can be accessed; and sending the requested data with data to be currently sent, said sending step including multiplexing the requested data and the data to be currently sent. - View Dependent Claims (2, 3, 4, 5)
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6. A video data sending and resending method between a coder and decoder, comprising:
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storing video data in at least one buffer; packeting the video data from said at least one buffer and sending the resultant video data packet to a receiver; receiving a resend request message of video data if an error is detected in the sent data, the resent request message including information identifying an area of a buffer where the requested video data is stored, said buffer area including a copy the requested video data in error and being divided according to variable-length codes such that an individual variable-length code can be accessed; and sending the requested video data with video data to be currently sent from said at least one buffer to the receiver, wherein said step of sending the requested video data includes multiplexing the requested video data and the video data to be currently sent. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A video coding and decoding system, comprising:
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at least one buffer being divided according to variable-length codes such that individual variables-length codes can be retrieved; a video data coding processor storing a compressed video data in said at least one buffer; a data sending processor configured to packet the video data from the at least one buffer and transmit the video data packets; and a data receiving processor configured to receive the video data packets and send a resend request message of a video data to the data sending processor if an error is detected, the resend request message including information identifying an area of a buffer where the requested video data is stored, said buffer area including a copy the requested video data in error, wherein the data sending processor is further configured to multiplex the requested video data and video data to be currently sent from said at least one buffer to the data sending processor. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A data resending method, comprising:
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receiving a resend request message of data received in error; and multiplexing the requested data with data to be currently sent, said requested data including only the data received in error, wherein the resend request message includes information identifying a storage area where the requested data is stored, said storage area including a copy of the requested data received in error and being divided accordingly to variable-length codes such that an individual variable-length code can be accessed. - View Dependent Claims (27, 28, 29, 30)
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Specification