Low complexity and unified transforms for video coding

Details Low complexity and unified transforms for video coding Low complexity and unified transforms for video coding

2008-02-15

2009-12-01

Bali, Vikkram (Department: 2624)

Image analysis

Image compression or coding

Transform coding

C382S232000, C382S233000, C382S248000, C375S240200

Reexamination Certificate

active

07627187

ABSTRACT:
A method and apparatus is disclosed herein for decoding data (e.g., video data) using transforms. In one embodiment, the decoding process comprises scaling a block of coefficients using a scaling factor determined for each coefficient by computing an index for said each coefficient and indexing a look-up table (LUT) using the index. The index is based on a quantization parameter, a size of the block of coefficients, and a position of said each coefficient within the block. The method also comprises applying a transform to the block of scaled coefficients.

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