1 Summary We propose a context-based, adaptive, predictive coding system for lossless/nearly-lossless compression of continuous-tone images. The system provides better compression than other lossless image coders in the literature. This is accomplished with low time and space complexities. The high coding eeciency of the proposed image compression system is due to the use of a novel, nonlinear,...

A novel predictive lossless coding scheme is proposed. The prediction is based on a new weighted cascaded least mean squared (WCLMS) method. WCLMS is especially designed for music/speech signals. It can be used either in combination with psycho-acoustically preltered signals (an idea presented in [1]) to obtain perceptually lossless coding, or as a stand-alone lossless coder. Experiments on a d...

Recently, an MPEG2 AAC [1] based lossless audio codec with the Integer MDCT (IntMDCT) was proposed [2]. The IntMDCT was constructed by lifting scheme [3] to hold the perfect reconstruction(PR). In this paper, we will evaluate the IntMDCT implemented by fixed-point arithmetic with quantized lifting coefficients in the MPEG2 AAC based lossless audio coding. The results indicate that there exists ...

Context-based adaptive variable length coding (CAVLC) and context-based adaptive binary arithmetic coding (CABAC) are entropy coding methods employed in the H.264/ AVC standard. Since these entropy coders are originally designed for encoding residual data, which are zigzag scanned and quantized transform coefficients, they cannot provide adequate coding performance for lossless video coding whe...

Since context-based adaptive binary arithmetic coding (CABAC) as the entropy coding method in H.264/AVC was originally designed for lossy video compression, it is inappropriate for lossless video compression. Based on the fact that there are statistical differences of residual data between lossy and lossless video compression, we propose an efficient differential pixel value coding method in CA...

As the latest extension of MPEG-4 Audio coding, MPEG-4 Lossless Audio Coding includes a scalable audio coding solution (SLS) that integrates the functionalities of lossless audio coding, perceptual audio coding, and fine granular scalable audio coding into a single coder framework while providing backward compatibility to MPEG Advanced Audio Coding (AAC) at the bit-stream level. Despite its abu...

In this paper, we propose an improved DC prediction method for high-efficiency video coding (HEVC) intra coding. The technique involves the application of pixel-wise predictors rather than block-based predictor in the DC mode. In HEVC, the pixels of neighboring reconstructed blocks are used to support multiple directional spatial prediction modes and reduce spatial redundancy. For lossless codi...

We have seen rapid progress in high-quality compression of wideband audio signals. Today’s coding algorithms can achieve substantially better compression than was thought possible only a few years ago. In the case of audio coding with its bandwidth of 20 kHz and more, the concept of perceptual coding has paved the way for significant bit rate reductions. However, multiple coding can reveal orig...