Television – Bandwidth reduction system – Data rate reduction
Patent
1995-08-22
1997-12-02
Au, Amelia
Television
Bandwidth reduction system
Data rate reduction
348412, H04N 736
Patent
active
056941714
ABSTRACT:
A moving image encoding apparatus includes an image encoder and a prediction structure determination unit. The image encoder having a first mode for performing intra-frame coding for moving image data without performing prediction along a time axis, the moving image data being constituted by a plurality of continuous frames, a second mode for performing inter-frame prediction for the moving image data using one-way prediction along the time axis, and a third mode for performing frame interpolation prediction for the moving image data using two-way prediction along the time axis. The prediction structure determination unit determines positions for one or more frames to be subjected to the intra-frame coding in the first mode, frames to be subjected to the inter-frame prediction in the second mode, and a frames to be subjected to the frame interpolation prediction in the third mode in accordance with at least the number of frames corresponding to inter-frame prediction coding in the second mode that occur in an input image signal.
REFERENCES:
patent: 5134476 (1992-07-01), Aravind et al.
patent: 5185819 (1993-02-01), Ng et al.
patent: 5473378 (1995-12-01), Tamitani
"Embedded Image Coding Using Zerotrees of Wavelet Coefficients" by J.M. Shapiro, IEEE Transactions on Signal Processing, vol. 41, No. 12, Dec., 1993, pp. 3445-3462.
"Subband Coding of Images" by J.W. Woods et al., IEEE Transactions on Acoustics Speech Processing, vol. ASSP 34, No. 5, Oct., 1986, pp. 1278-1288.
Au Amelia
NEC Corporation
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