Patent ID: 6512792
Filing Date: 2003-01-28
Classification: H04N

Abstract:
A moving image encoding apparatus, comprising:prediction means for predicting a pixel block in a current frame of an input moving image signal from a preceding frame of the input moving image signal using motion compensation to produce a predictive error frame; orthogonal transform means for orthogonally transforming the predictive error frame; quantization means for quantizing the orthogonally transformed frame; encoding means for encoding the quantized frame; a transmission buffer for storing the frame encoded by said encoding means; moving/still discrimination means for discriminating a moving area and a still area of the input moving image signal; and control means for receiving output from said moving/still discrimination means and remaining capacity of said transmission buffer and for providing a noise elimination parameter to said quantization means; said quantization means controlled by said noise elimination parameter quantizing the orthogonally transformed frame from said orthogonal transform means with a quantization step size having a different characteristic from that of a quantization step size which is used in dequantization included in the prediction processing of said prediction means and is used for the encoding processing by said encoding means.