Residual DPCM about Motion Compensated Residual Signal for H.264 Lossless Coding

Ki-Hun HAN  Kamisetty R. RAO  Yung-Lyul LEE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E92-A   No.5   pp.1386-1389
Publication Date: 2009/05/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E92.A.1386
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Image
lossless coding,  DPCM,  Inter prediction,  H.264,  

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In this letter, a new Inter lossless coding method based on a residual DPCM (Differential Pulse Code Modulation) is proposed to improve compression ratio in the H.264 standard. Since the spatial correlation in a residual block can be further exploited among the residual signals after motion estimation/compensation, horizontal or vertical DPCM in the residual signals can be applied to further reduce the magnitudes of the residual signals. The proposed method reduces the average bitrates of 3.5% compared with the Inter lossless coding of the H.264 standard.