A new approach for designing bilayer and multi-layer LDPC codes is proposed studied in the asymptotic regime. The ensembles are defined through individual uni-variate degree distributions, one each layer. We present a construction that: 1) enables low-complexity decoding high-SNR channel instances, 2) provably approaches capacity low-SNR 3) scales linearly (in terms of design complexity) number...

Over the years, the focus in noise robust speech recognition has shifted from noise robust features to model based techniques such as parallel model combination and uncertainty decoding. In this paper, we contrast prime examples of both approaches in the context of large vocabulary recognition systems such as used for automatic audio indexing and transcription. We look at the approximations the...

Non-intrusive and automatic raw part alignment for machining process is a current challenge for industry, due to the high cost of bad machining. The use of artificial markers, such as coded-targets (CT) provides a promising technique to be applied within industrial environments due to its robustness, non-intrusive nature and low cost. In this paper, an CT identification and decoding algorithm i...

By optimum combination of optical pre-processing and digital post-processing, or optical coding and digital decoding of the image information, incoherent optical systems invariant to numerous aberrations can be formed. The theory of aberration invariance can also be used with low-cost, low-precision optics to produce systems that image with the performance of high-cost, high-precision, or near ...

Speed Enhancements to DID (Section 2) When Document Image Decoding (DID) was proposed [15], its attractiveness lay primarily in its potential for high recognition accuracy, owing to its communications-theoretic framework, and well defined models and objective function (posterior probability). In its initial implementations it suffered from high computational cost relative to commercial OCR meth...

The deployment of video services to the home will continue to push the development of low cost Digital Set Top Units (STUs) for decoding MPEG video. One technique for reducing cost is to minimize the bu er space in the network interface. This means that the STU will only accept small packets. Video pump design for this situation is complex when the video pump is based on a general purpose works...