Modern low-speed speech codecs provide the satisfactory quality of signal transmission up to the speed of about 600 bps. High speech quality is obtained at the speed of more than 1200 bps, speeds of 200 and less are practically not used, because the intelligibility rapidly falls after the values of about 300 bps.
For the lidar signal detection in a radar warning receiver (RWR) very simple design solutions like a single-limit comparator after the input amplifier are often used. Further processing is conducted with the help of the built-in processor, which uses only the values of time intervals between pulses for the analysis. It is clear that such an approach to the detection problem solving has multiple disadvantages. For example, the comparator output signal has passed a non-linear and irreversible transformation and the pulse amplitude information is lost irreversibly.
Currently, our obviously underestimated estimates, by means of "Telecard" they give not less than 100 000 telemedicine consultations per year in Russia and Ukraine. Even if we assume that only one of hundreds transmitted electrocardiograms is really vital, and the probability of a correct decision on the provision of emergency assistance is 1/2, then not less than five hundred people a year do not give up the ghost or become disabled as a result of a timely remote diagnosis. Naturally, loss of the state decreases also - according to official data, about 15,000 USD per one person - a total of 15000х500=7.5 million cabbage annually.
In spite of the fact that some people, having read glossy ads of various firms, think that there are no problems in ECG recording, severe practice of post-soviet (and other as well) medical institutions reveal, sometimes-somewhere, the trends. Especially during Holter examinations. And they considerably hamper the medical analysis. What concerns radio monitoring systems and bedside monitors, the trend for them is especially unpleasant, as the analysis is real-time by definition. All the more the operator reacts to what he sees on the screen here and now. And when the curves are spread all over the screen or, even worse, have reached its boundaries, the situation becomes disgusting indeed.
Let us suppose that there is an idealized radio locator with the task to detect a target with the RCS approaching very small values. We suppose the noise of the locator receiver unit to be non-changeable non-zero and data accumulation when using multiple location is not permissible. We also think that the size of the target shining point is negligibly small compared to the “pencil” beam spot. The method of detection and selection of the decision making threshold are considered close to the theoretical optimum.
Slightly paraphrasing Brodsky, we can say that we live in a time of complete and final victory of ideas of Montesquieu that have disfigured the world, multiplied by the inveterate liberalism, when the separation of powers, universal, equal and secret suffrage and other unimaginable for adequate management postulates have become a quite dangerous commonplace. All the more dangerous because for ignoring these postulates one can "get his ass kicked in full" from the Boss, and the literal fulfillment of the democratic demands will inevitably lead to the degradation of any state.
In this paper we offer the substitution of basic QRS complex detection algorithm which is able to use the benefits of raised computational power. Implementation of an optimal detection / recognition method and replacement of AGC with Pearson correlator can dramatically lower the number of false heart beat detections during ECG analysis.
More than four years have passed since the telemedical network of urgent ECG diagnosis “Telecard” was created and launched in Ukraine. Now this network covers all regions and all levels of health care.
This article is the third, which has become already traditional, overview of problems and achievements in the course of the “Telecard” network development. The material of this article is based on the data collected in the course of annual monitoring carried out by the initiative of the TREDEX LLC enterprise – the developer and manufacturer of the “Telecard” equipment.
R.V.Pavlovich (Ph.D.(Tech), Director of “TREDEX Company” LLC)
The most important task of health care in a civilized state, which contributes to the stability of the society, is ensuring the rights of a citizen on medical service regardless his or her social status and residence... However, while the problems of provisioning medical and prophylactic institutions with full-fledged financing, equipping with up-to-date equipment and other resources can be solved at least theoretically, it is impossible to staff each regional hospital with world-class specialists even in theory. Such problem can be solved only by introducing telemedical technologies into the practice of health care institutions.
(Concept of development of telemedical technologies in the Russian Federation; approved by the order of the Ministry of Health of RF No. 344/76 from August 27,2001)
Summary: «Telecard» - is a functionally complete part of medical diagnostic set «Tredex» (designed and manufactured by LLC «TREDEX Company», Kharkov), intended for transtelephone ECG consultations within the scope of telemedical approach to the creation of the system of urgent cardiological diagnosis. It has a number of undeniable advantages that distinguish it on the background of existing counterparts; ensures transmission of a digital synchronous standard 12-channel ECG over any distance by means of any voice communication channels (standard telephone lines, mobile phones, radio extenders of any model, portable and stationary radio stations, etc.)
