Quantizing apparatus and quantizing method

Details Quantizing apparatus and quantizing method Quantizing apparatus and quantizing method

1998-05-07

2000-06-06

Pham, Chi H.

Pulse or digital communications

Pulse code modulation

375245, 341143, 348472, H04B 1404

Patent

active

06072837&

ABSTRACT:
A subtraction device subtracts a predicted value generated by a predicting portion from a digital picture signal supplied through an input terminal. The subtraction device generates a difference signal as an output signal. A quantizing portion detects an activity of the difference signal, designates the number of quantizing steps corresponding to the activity, and quantizes the difference signal with the number of quantizing steps. The quantizing portion outputs side information to an output terminal.

REFERENCES:
patent: 5136615 (1992-08-01), Tanoi
patent: 5231484 (1993-07-01), Gonzales et al.
patent: 5291286 (1994-03-01), Murakami et al.
patent: 5555273 (1996-09-01), Ishino
patent: 5587708 (1996-12-01), Chiu
patent: 5870434 (1999-02-01), Kondo et al.

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