DPCM Coding of Video Signals

Delta Modulation and Dpcm Coding of Color Signals

A simple yet efficient class of coding systems employed extensively in coding correlated sources is the DPCM and delta modulation systems. We will study the performance of the adaptive and the simple delta modulators at high sampling rates and will compare that to the performance of well designed DPCM systems. The results are obtained by simulating the coding systems on a digital computer and u...

A survey of hybrid MC/DPCM/DCT video coding distortions

The motion-compensated hybrid DCT/DPCM algorithm has been successfully adopted in various video coding standards, such as H.261, H.263, MPEG-1 and MPEG-2. However, its robustness is challenged in the face of an inadequate bit allocation, either globally for the whole video sequence, or locally as a result of an inappropriate distribution of the available bits. In either of these situations, the...

Vectorial DPCM coding and application to wideband speech coding

This paper deals with optimal coding for vectorial signals by means of a decorrelating transform such as DPCM. We show that the optimal causal transform corresponds to a (Lower-Diagonal-Upper) triangular factorization of the autocorrelation matrix of the signal : the transformation matrix is triangular and unit diagonal. Each one of its rows is the optimal prediction filter for the correspondin...

Video coding with superimposed motion compensated signals

Adaptive residual DPCM for lossless intra coding

In the Differential Pulse-code Modulation (DPCM) image coding, the intensity of a pixel is predicted as a linear combination of a set of surrounding pixels and the prediction error is encoded. In this paper, we propose the adaptive residual DPCM (ARDPCM) for intra lossless coding. In the ARDPCM, intra residual samples are predicted using adaptive mode-dependent DPCM weights. The weights are est...