Coding device, coding method and storage medium

Details Coding device, coding method and storage medium Coding device, coding method and storage medium

2005-09-27

2005-09-27

Rao, Andy (Department: 2613)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240180

Reexamination Certificate

active

06950471

ABSTRACT:
A code length of image coded data is length-fixed in accordance with a code length representing a required criterion. For this purpose, a discrete wavelet transformation unit110performs discrete wavelet transformation of image data. A factor quantization unit112performs quantization. An entropy coding unit113performs entropy coding of a factor quantized value by arithmetic coding. If the code length of quasi image coded data is longer than the code length designated by a designated image coded data code length inputting unit102, entropy coded values are deleted in the unit of sub-bands so that the code length of the quasi image code data equals the designated code length. If the code length of quasi image coded data is shorter than the designated code length, adjustment bits are added.

REFERENCES:
patent: 5867602 (1999-02-01), Zandi et al.
patent: 6549666 (2003-04-01), Schwartz

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