Lossless Compression of Mapped Domain Linear Prediction Residual for ITU-T Recommendation G.711.0

Abstract

ITU-T Rec. G.711 is widely used for the narrow band speech communication. ITU-T has just established a very low complexity and efficient lossless coding standard for G.711, called G.711.0 - Lossless compression of G.711 pulse code modulation. This paper introduces some coding technologies newly proposed and applied to the G.711.0 codec, such as Plus-Minus zero mapping for the mapped domain linear predictive coding and escaped-Huffman coding combined with adaptive recursive Rice coding for lossless compression of the prediction residual. Performance test results for those coding tools are shown in comparison with the results for the conventional technology. The performance is measured based on the figure of merit (FoM), which is a function of the trade-off between compression performance and computational complexity. The proposed tools improve the compression performance by 0.16% in total while keeping the computational complexity of encoder/decoder pair low (about 1.0 WMOPS in average and 1.667 WMOPS in the worst-case).