8×8 transform and quantization

Details 8×8 transform and quantization 8×8 transform and quantization

2004-11-16

2011-11-29

Bullock, Jr., Lewis (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S400000, C375S240170, C382S205000, C382S248000

Reexamination Certificate

active

08069201

ABSTRACT:
Low complexity (16 bit arithmetic) video compression has 8×8 block with transforms using 8×8 integer matrices and quantization with look up table scalar plus constant right shift for all quantization steps. Inverse quantization also a look up table scalar plus right shift dependent upon the quantization step and inverse transform using the 8×8 integer matrices.

REFERENCES:
patent: 5276784 (1994-01-01), Ohki
patent: 5854757 (1998-12-01), Dierke
patent: 6195466 (2001-02-01), Schwartz et al.
patent: 6587590 (2003-07-01), Pan
patent: 7082450 (2006-07-01), Hallapuro et al.
patent: 2003/0078953 (2003-04-01), Hallapuro et al.
patent: 2004/0010528 (2004-01-01), Kumar et al.

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