We extend our previous work on space-frequency quantization (SFQ) for image coding from wavelet transforms to the more general wavelet packet transforms [2]. The resulting wavelet packet coder offers a universal transform coding framework within the constraints of filterbank structures by allowing joint transform and quantizer design without assuming a priori statistics of the input image. In o...

This paper describes the evaluation, test and selection of STANAG 4591, the future NATO Narrow Band Voice Coder (NBVC). STANAG 4591 will enable high performance interoperable secure speech communications in harsh acoustic and channel error environments at rates of 1.2kbps and 2.4kbps. The low data rate requirements of this voice coder allow it to operate on channels with low throughput, such as...

A new characteristic waveform (CW) interpolation coder is proposed in this paper. In the proposed coder, two characteristic waveforms are extracted from LPC residual signal at each frame. The Waveform Interpolation (WI) is operated within the frame. In the novel WI, variable dimension vector quantization (VDVQ) and power vector quantization are proposed and the low frequency band (LFB) and high...

In this paper we present a coder for polygon mesh connectivity that delivers the best connectivity compression rates meshes reported so far. Our coder is an extension of the vertex-based coder for triangle mesh connectivity by Touma and Gotsman [26]. We code polygonal connectivity as a sequence of face and vertex degrees and exploit the correlation between them for mutual predictive compression...

Abstract Long-term geomagnetic data monitoring will generate a huge amount of data, and compression algorithms be required to reduce the save storage transmission expenses. To adapt application with limited resources, CCSDS lossless algorithm is applied measurement in our work. This made up two parts: preprocessor an adaptive entropy coder. In this study, unit-delay predictor chosen as based on...

A motion-compensated wavelet video coder is presented that uses adaptive mode selection (AMS) for each macroblock (MB). The block-based motion estimation is performed in the spatial domain, and an embedded zerotree wavelet coder (EZW) is employed to encode the residue frame. In contrast to other motion-compensated wavelet video coders, where all the MBs are forced to be in INTER mode, we constr...

This work investigates a Distributed Video Coding (DVC) method for single view video sources. DVC is different from hybrid block-based video coding as there is no temporal prediction included in the encoding process. This makes video codecs with low encoder workload possible. DVC in this thesis is an extension of source coding with side information, a subset of Slepian-Wolf coding. The theoreti...

This paper proposes an integrated approach to Internet video streaming and multicast (e.g., receiver-driven layered multicast (RLM) by McCanne) based on combined wavelet video coding and error control. We design a packetized wavelet video (PWV) coder to facilitate its integration with error control. The PWV coder produces packetized layered bitstreams that are independent among layers while bei...

This paper describes the development of a dual-rate Sinusoidal Transform Coder in which a 2400 b/s coder is embedded as a separate packet in the 4800 b/s bit skream. The underlying coding structure provides the flexibility necessary for multirate speech coding and multimedia applications.

imated nonlinear filter banks has been introduced [4, 8,9], where PR is obtained by imposing restrictions on the filter structure instead of on the filter coefieients. We use here a particularisation of a we propose a the general structure of a JPEG coder, but which uses a nonlinear transform to replace the DCT. The nonlinear transform pyramidal coder' which