Two dimensional discrete wavelet transforms

Details Two dimensional discrete wavelet transforms Two dimensional discrete wavelet transforms

2007-10-02

2007-10-02

Rao, Andy (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240180

Reexamination Certificate

active

09614549

ABSTRACT:
The method performs a two-dimensional discrete wavelet transform on an image. The image comprises a plurality of blocks of pixels. The method generates (340) a current output block of subband data corresponding to a current block. The current output block is generated before either a one-dimensional discrete wavelet row or column transformation of a next block of pixels is completed, using intermediate lifting values stored (310, 350) during the generation of a plurality of previous blocks of subband data.

REFERENCES:
patent: 5870145 (1999-02-01), Yada et al.
patent: 5949912 (1999-09-01), Wu
patent: 6157746 (2000-12-01), Sodagar et al.
patent: 6523051 (2003-02-01), Majani et al.
patent: 6584154 (2003-06-01), Wu
patent: 6741666 (2004-05-01), Henry et al.

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