Picture encoding apparatus, picture encoding method, picture enc

Details Picture encoding apparatus, picture encoding method, picture enc Picture encoding apparatus, picture encoding method, picture enc

1997-09-17

2000-01-11

Le, Vu

Television

Bandwidth reduction system

Data rate reduction

348420, H04N 732

Patent

active

060141743

ABSTRACT:
On a decoding side, parameters (minimum value MIN and dynamic range DR) are optimized in such a manner that a decoded error of original signal values and restored values becomes minimum. A maximum value detecting portion 2 detects the maximum value MAX of pixels of each block composed of (3.times.3) pixels. Likewise, a minimum value detecting portion 3 detects the minimum value MIN. A subtracting portion 4 generates a dynamic range DR. A subtracting portion 5 subtracts MIN from each of input pixel values y and generates normalized values. A step width calculating portion 6 calculates a quantizing step width .DELTA. with DR. A quantizing portion 7 generates quantized values x (each of which is composed of 4 bits) with .DELTA.. A least squares method based estimating portion 8 generates decoded values y' with y and x and obtains an optimized dynamic range DR' and an optimized minimum value MIN' in such a manner that the sum of square of an error (y'-y) becomes minimum. A framing portion 11 frames x, DR', and MIN' and records the framed data on a record medium 15 through an error-correction-code adding portion 12, a modulating portion 13, and a recording portion 14.

REFERENCES:
patent: 4703352 (1987-10-01), Kondo
patent: 4772947 (1988-09-01), Kono
patent: 5049990 (1991-09-01), Kondo et al.
patent: 5150208 (1992-09-01), Otaka et al.
patent: 5193003 (1993-03-01), Kondo
patent: 5196931 (1993-03-01), Kondo
patent: 5416604 (1995-05-01), Park
patent: 5444487 (1995-08-01), Kondo et al.
patent: 5481554 (1996-01-01), Kondo
patent: 5528606 (1996-06-01), Kondo et al.
patent: 5612751 (1997-03-01), Kondo
patent: 5627905 (1997-05-01), Sebok et al.
patent: 5734433 (1998-03-01), Kondo et al.

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