Analysis of neural spikes is well established [4]. Many methods can be used to uncover distinct patterns of spikes. Consider two spike trains: 10101010 and 11110000, recorded in 1 s (where 1 represents the occurrence of a spike in a bin of length 1000/8 ms). The firing rates of both spike trains are identical (4 Hz), however the patterns are different; that is, the first train shows an oscillat...

The poor quality of wireless electrocardiography (ECG) recordings can lead to misdiagnosis and waste of medical resources. This study presents an interpretation of Lempel-Ziv (LZ) complexity in terms of ECG quality assessment, and verifies its performance on real ECG signals. Firstly, LZ complexities for typical signals, namely high-frequency (HF) noise, low-frequency (LF) noise, power-line (PL...

Video coding technologies have played a major role in the explosion of large market digital video applications and services. In this context, the very popular MPEG-x and H-26x video coding standards adopted a predictive coding paradigm, where complex encoders exploit the data redundancy and irrelevancy to 'control' much simpler decoders. This codec paradigm fits well applications and services s...

We consider the problem of decompressing the Lempel-Ziv 77 representation of a string S ∈ [σ] using a working space as close as possible to the size z of the input. The folklore solution for the problem runs in optimal O(n) time but requires random access to the whole decompressed text. A better solution is to convert LZ77 into a grammar of size O(z log(n/z)) and then stream S in optimal linear...

OBJECTIVE The neurodevelopmental-neurodegenerative debate is a basic issue in the field of the neuropathological basis of schizophrenia (SCH). Neurophysiological techniques have been scarcely involved in such debate, but nonlinear analysis methods may contribute to it. METHODS Fifteen patients (age range 23-42 years) matching DSM IV-TR criteria for SCH, and 15 sex- and age-matched control sub...

Artificial multi-cellular organisms develop from a single zygote to different structures and shapes, some simple, some complex. Such phenotypic structural complexity is the result of morphogenesis, where cells grow and differentiate according to the information encoded in the genome. In this paper we investigate the structural complexity of artificial cellular organisms at phenotypic level, in ...

We consider the Wyner–Ziv (WZ) problem of lossy compression where the decompressor observes a noisy version of the source, whose statistics are unknown. A new family of WZ coding algorithms is proposed and their universal optimality is proven. Compression consists of sliding-window processing followed by Lempel–Ziv (LZ) compression, while the decompressor is based on a modification of the discr...

Diagnosis of mild Traumatic Brain Injury (mTBI) was difficult due to the variability of obvious brain lesions using magnetic resonance imaging (MRI) or computed tomography (CT) scans. A promising tool for exploring potential biomarkers for mTBI is magnetoencephalography which has the advantage of high spatial and temporal resolution. By adopting proper analytic tools from the field of symbolic ...

Distributed video coding (DVC) is a new video coding paradigm based on two key Information Theory results: the Slepian-Wolf and Wyner-Ziv theorems. Recently, promising results were shown in Wyner-Ziv (WZ) video coding, a particular case of DVC. In the literature, many practical WZ coding approaches model the correlation noise between the original frame and the so-called side information by a gi...