Picture encoding apparatus, picture encoding method, picture encoding and transmitting method, and picture record medium

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