Patent
Differential entropy based data compression for waveforms
TLDR
In this paper, a truncated entropy encoding map is generated and the values within the map are selected to be encoded or unencoded to provide an overall compression of the data, which is then used by an encoder to further sub-select the values.Abstract:
Waveforms are digitally sampled and compressed for storage in memory. The compression of the data includes generating a truncated entropy encoding map and using the values within the map to obtain good compression. An encoder further sub-selects values to be encoded and values to remain unencoded to provide an overall compression of the data.read more
Citations
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Patent
Depth of consciousness monitor including oximeter
Ammar Al-Ali,Yassir Abdul-Hafiz +1 more
TL;DR: In this article, the authors present a sensor for monitoring the depth of consciousness of a patient, which includes a plurality of light sources, light detectors, and in some embodiments, electrodes.
Patent
Modular physiological sensors
Ammar Al-Ali,Kevin Forrest +1 more
TL;DR: In this paper, modular physiological sensors that are physically and/or electrically configured to share a measurement site for the comfort of the patient and to ensure proper operation of the sensors without interference from the other sensors are presented.
Patent
Methods and devices for data compression using context-based coding order
TL;DR: In this paper, a context model is used to determine the context of each symbol and a probability estimation is made for each symbol, and a method is presented for revising the coding order to be context-based, grouping symbols consecutively on the basis that they have a common context.
Patent
Encoding and decoding methods and devices employing dual codesets
Gergely Ferenc Korodi,Dake He +1 more
TL;DR: In this paper, a context model is used to select an encoding tree corresponding to an estimated probability at the encoder, which is used by the decoder to select a decoding tree.
Patent
Method and device for compression of binary sequences by grouping multiple symbols
Gergely Ferenc Korodi,Dake He +1 more
TL;DR: In this article, a 2L-ary encoding tree with codewords associated with leaf nodes is used to select an encoding tree corresponding to an estimated probability at the encoder, which is then used by the decoder to select a decoding tree.
References
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Journal ArticleDOI
ECG data compression techniques-a unified approach
TL;DR: The theoretical bases behind the direct ECG data compression schemes are presented and classified into three categories: tolerance-comparison compression, DPCM, and entropy coding methods and a framework for evaluation and comparison of ECG compression schemes is presented.
Patent
Heart rejection monitoring apparatus and method
TL;DR: An implantable cardiac allograft rejection monitoring apparatus and method for measuring stimulated intracardiac electrogram potentials, performing processing and time based analysis of changes in the potential, and deriving from the time history of the analyzed signals allOGraft rejection control parameters are presented in this article.
Patent
Data compression methods and apparatus for use with physiological data
TL;DR: In this article, the authors describe a process of physiological data compression, notably cardiac activity, especially for a recording of an electrocardiogram or a Holter electrogram, which is characterized by the following successive operations: (a) acquisition of data by collection of an electrical signal and sampling of this signal at a given frequency; (b) determination of the first derivative of the sampled signal; (c) determination and analysis of the second derivative of sampled signal, and (d) analyze predictively, according to a plurality of values of first and second derivatives and selection, for
Patent
Prediction of spectral coefficients in waveform coding and decoding
TL;DR: In this article, techniques and tools for prediction of spectral coefficients in encoding and decoding are described, where the authors exploit correlation between adjacent spectral coefficients, making subsequent entropy encoding more efficient.
Patent
Image coding/recording apparatus and image coding/recording method
Katsuo Saigo,Hiroshi Arakawa +1 more
TL;DR: In this paper, the authors proposed an image coding/recording apparatus which can solve problems of large processing loads due to real-time re-coding and problems of complicated controls and circuits for returning processing.