Title :
Hybrid picture coding with wavelet transform and overlapped motion-compensated interframe prediction coding
Author :
Ohta, Mutsumi ; Nogaki, Satoshi
Author_Institution :
C&C Inf. Technol. Res. Labs., NEC Corp., Kawasaki, Japan
fDate :
12/1/1993 12:00:00 AM
Abstract :
A novel video coding scheme using an orthonormal wavelet transform is proposed. The wavelet transform is used in a motion compensated interframe coder in which a blockless motion compensation technique is employed to increase efficiency of wavelet transform coding. A new scanning method for wavelet coefficients is also proposed which is rather different from subband coding. Simulation work is carried out to evaluate the proposed coding method. Significant improvement in subjective quality is obtained over that obtained with conventional hybrid coding methods that use blockwise motion compensation and DCT. Some improvement has also been realized in the signal to noise ratio. Although wavelet coding is still in its early stages of development, it appears to hold great promise for motion picture coding
Keywords :
codecs; filtering and prediction theory; image coding; motion estimation; video signals; wavelet transforms; blockless motion compensation technique; hybrid picture coding; motion compensated interframe coder; motion picture coding; orthonormal wavelet transform; overlapped motion-compensated interframe prediction coding; scanning method; signal to noise ratio; subjective quality; video coding scheme; wavelet coefficients; wavelet transform; Discrete cosine transforms; Entropy coding; Filter bank; Frequency domain analysis; Image coding; Noise reduction; Quantization; Transform coding; Video coding; Wavelet transforms;
Journal_Title :
Signal Processing, IEEE Transactions on
