Two-dimensional orthogonal transformation and quantization...

Details Two-dimensional orthogonal transformation and quantization... Two-dimensional orthogonal transformation and quantization...

2007-04-10

2007-04-10

Tran, Phuoc (Department: 2624)

Image analysis

Image compression or coding

Transform coding

C382S277000

Reexamination Certificate

active

10335856

ABSTRACT:
In a process of resolving the two-dimensional orthogonal transformation into the one-dimension orthogonal transformations in a horizontal direction and a vertical direction, with respect to each signal vector within the block memory to be orthogonal-transformed in a vertical direction orthogonal transforming unit after having been orthogonal-transformed in a horizontal direction orthogonal transforming unit, a power calculating unit calculates the power of each signal vector, a threshold obtaining unit requires a threshold enabling the quantized coefficient signal to take a value other than zero, and a value comparing unit compares the both powers. When the power calculated by the power calculating unit is below the threshold, the vertical-directional orthogonal transformation and quantization processing as for the corresponding signal vector is omitted and a zero coefficient vector generating unit generates the quantized coefficient signal vector simply consisting of zero and supplies it as the calculation result.

REFERENCES:
patent: 4394774 (1983-07-01), Widergren et al.
patent: 5086488 (1992-02-01), Kato et al.
patent: 2001/0026642 (2001-10-01), Kang et al.
patent: 3-85871 (1991-04-01), None
patent: 6-70175 (1994-03-01), None
patent: 10-173759 (1998-06-01), None
patent: 2001-196935 (2001-07-01), None
patent: 10-0237885 (1999-10-01), None

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