Picture-encoding apparatus and picture-encoding method

Details Picture-encoding apparatus and picture-encoding method Picture-encoding apparatus and picture-encoding method

2005-04-05

2005-04-05

Couso, Yon J. (Department: 2625)

Image analysis

Image compression or coding

Pyramid, hierarchy, or tree structure

C382S243000, C382S244000, C382S248000, C382S252000, C341S094000, C341S095000, C375S240110, C375S240180

Reexamination Certificate

active

06876772

ABSTRACT:
A picture-encoding apparatus provided by the present invention includes a wavelet transformation unit for carrying out wavelet transformation on an input picture to generate wavelet-transformation coefficients, a bit-plane encoding-pass-generating unit for spreading the wavelet-transformation coefficients over bit-planes, an arithmetic encoding unit for carrying out an arithmetic encoding process in an encoding pass, a rate control unit for controlling an encoded-data quantity of the generated arithmetic code so as to achieve a target encoded-data quantity, a header-generating unit for generating a header, a packet-generating unit for generating a packet by addition of the header to the arithmetic code experiencing control of the encoded-data quantity executed by the rate control unit, and an encoded-code-stream-truncating means for truncating an encoded-code stream completing processing through all the encoding passes by discarding a rear portion of the stream so as to make an encoded-data quantity of the stream equal to a target encoded-data quantity.

REFERENCES:
patent: 5798794 (1998-08-01), Takahashi
patent: 5825935 (1998-10-01), Murakoshi
patent: 6125143 (2000-09-01), Suzuki et al.
patent: 6229926 (2001-05-01), Chui et al.
patent: 6477280 (2002-11-01), Malvar
patent: 6560369 (2003-05-01), Sato

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