Low-complexity error-resilient coder using a block-based standar

Details Low-complexity error-resilient coder using a block-based standar Low-complexity error-resilient coder using a block-based standar

1998-02-02

2000-10-31

Lee, Thomas D.

Image analysis

Image compression or coding

Interframe coding

382238, 348415, 348466, G06K 936, H04N 712, H04N 700

Patent

active

061414484

ABSTRACT:
Disclosed is an error-correction method and apparatus for transmission of block-based coding standard compliant video data, such as H.263, MPEG or JPEG. A picture is divided into slices wherein each slice of the picture is coded into a group of blocks (GOB) in which each macroblock in the GOB is encoded only with reference to other macroblocks in the same GOB. An erasure slice, which is also a GOB, is then formed wherein the data for each macroblock of the erasure slice is determined by summing a corresponding macroblock in each of the GOBs containing slices of the picture. The GOBs containing slices of the picture are then transmitted, along with the GOB containing the erasure slice, as block-based coding standard compliant data packets. The result is that if any one of the GOBs containing slices of the picture is lost, then the lost GOB can be reconstructed from the remaining GOBs and the erasure slice.

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