INFORMATION SECURITY

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1 ISSN Science-Base Technologies (8) 79 INFORMATION SECRITY DC THE METHOD OF TIME SPENT ESTIMATING ON PROCESSING AND TRANSMISSION OF COMPRESSED VIDEO STREAM A. Leah I. Cheremsoy 2 I. Kozheub Air Force niversiy Kharov 2 Naional Technical niversiy Kharov Polyechnic Insiue alberleah@mail.ru The paper analyzes he main characerisics of he efficiency of mehos for processing vieo which influence he evaluaion ime coss in he processing an ransmission of he vieo sream. An evaluaion of he effeciveness of ime spen in he processing an ransmission of he vieo sream base on he experimenal harware an sofware implemenaions for he saionary bacgroun of ynamic images from ifferen values of he hreshol filering. Buil meho for esimaing he ime spen on processing an ransmission of he vieo sream. The coniions uner which he ime require for he processing an ransmission of he vieo sream o he evelope echnology reuces he relaive ime coss for he echnology MPEG. Keywors: ime coing ecoing ime he ransfer ime he spee of aa ransmission he vieo sream. У статті проаналізовано основні характеристики ефективності методів обробки відеопотоку які впливають на оцінку часових витрат під час обробки і передачі відеопотоку. Проводиться оцінка ефективності часових витрат при обробці і передачі відеопотоку на основі експериментальної програмно-апаратної реалізації для динамічних зображень стаціонарного фону від різних значень порогу фільтрації. Побудовано метод оцінки часових витрат на обробку і передачу відеопотоку. Визначені умови при яких часові витрати на доставку відеопотоку для розробленої технології зменшуються щодо часових витрат для технології MPEG. Ключові слова: тимчасове кодування час декодування час передачі швидкість передачі даних відеопотік. Leah A. Cheremsoy I. 203 Inroucion Proviing vieoinformaion services in auomae vieo surveillance sysems in rail ranspor wih he use of wireless communicaion echnologies is he curren issues of scienific an applie research. This is on one han limie by he characerisics of wireless echnology for imeconsuming processing an ransmiing vieo an he oher sharp increase image qualiy. To overcome his imbalance evelope vieo compression sysems [ 3]. One of he mos efficien vieo compression echnologies are consiere in [4; 5] ha reuce he volume of vieo sreams in erms of he echnical implemenaion of he permissible reamen processes. Such sysems are escribe in [4; 5]. To evaluae he effeciveness of he evelope mehos regaring he processing of vieoaa necessary o esimae he ime require for he processing an ransmission of he vieo sream in elecommunicaion sysems. Hence he goal of research is o consruc a meho for esimaing he ime spen on processing an ransmission of compresse vieo in elecommunicaion sysems base on he echnology of ynamic images compac represenaion of saionary bacgroun wih he formaion of ifferenially represene by he framebase processing of ynamic conen binary mas saionary bacgroun an marix signs. Esimae he ime spen on processing an ransmiing compresse vieo Esimae he ime spen on processing an ransmission of compresse vieo is performe o compression echnology evelope by ynamic images saionary bacgroun wih he formaion of ifferenially represene by he frame. This echnology is base on he processing of he ynamic componen ue o a one-imensional posiion-encoing wih aapive selecion of he base on he processing of binary mas saionary bacgroun a he expense of he wo lenghs coing capaciy of he binary alphabe series an on he reamen of he marix of characers ue o encoing he alphabe in power aing ino accoun he srucural similariy wih he marix binary mas. The values var of he oal processing ime an he frame is calculae by he formula: var = + + where he ime require respecively for coing an ecoing vieoaa; esimae of he aa ransmission in he elecommu-nicaions newor.

2 80 ISSN Science-Base Technologies (8) Time spen on coing an ecoing of he firs frame respecively are eermine from he expressions: =ν / MP ; =ν / MP where ν ν he average number of machine operaions respecively spen on coing an ecoing; MP spee of he microprocessor. Average compresse frame ransmission ime calculae by he formula = V / () where he ransmission spee of he communicaion channel (expresse as he number of bis per secon); V he average number of bis spen for one frame compresse represenaion. The average volume V for a single frame in he compresse represenaion of he flow is given by f Σ Vi V = (2) f where V i he number of bis i aes one frame compresse represenaion; f frames per secon; f Σ Vi a concise represenaion of he flow rae f. Volume compresse frame is calculae by he formula V =ν ( la + li) where ν he number of coewors in he compresse image; la l i he lengh of he aress an aa pars of he coewor. Subsiuing ino () he expression (2) for he value V of an expression for he esimae of he average ransmission ime of one frame f Σ Vi =. f Knowing he ime of coing an ecoing he curren frame an he average ime for aa ransmission in a elecommunicaions newor we can calculae he oal ime var of processing an ransmiing vieo aa. For he ime epenence of he evelope meho of ecoing frames on he values Δ Р of percolaion hreshol will be symmerical encoing ime frame of he hreshols. Diagram of he epenence of he encoing ifferen hreshol values Δ Р shown in fig.. From he analysis of he char in fig. can raw he following conclusions:. Encoing ime frame when choosing a hreshol wih a goo-qualiy moe (number 2) was 0.2 ms which is 48% less han he encoing ime frame when choosing a hreshol wihou loss of informaion (moe number ). 2. Depening on he percolaion hreshol Δ Р ime coe frames varies from 6.4 ms o 6. ms. The ime coe frames ecreases wih increasing values Δ Р of he percolaion hreshol on he average 28 %. Graph comparing he encoing ime frame of ifferen hreshol values Δ Р base on he echnology evelope an base on he MPEG echnology is shown in fig. 2. From he analysis of he char in fig. 2 we can mae he following conclusions:. Depening on he hreshol values Δ Р for he encoing frame of he echnology is reuce on average by 2% an for MPEG echnology reuce on average by 56%. 2. The ime frame for he coing of he echnology accoring o he percolaion hreshol Δ Р will be less han 00 o 0 imes han he ime bloc coing echnology for MPEG. Figure ransmission ime frames accoring o he meho evelope by a pea signal/noise raio a a aa rae of he communicaion channel = 26 bps is shown in fig. 3. Fig.. A plo of he encoing ime for ifferen hreshols Δ Р

3 ISSN Science-Base Technologies (8) 8 Fig. 2. Graph comparing encoing ime frame of he hreshol values for he evelope echnology an MPEG Δ Р Fig. 3. A graph of he ransmission ime of he pea signal/noise raio ρ a = 26 bps From he analysis of he char in fig. 3 he following conclusions:. Time frames for he ransmission of his meho a a aa rae of he communicaion channel = 26 bps is change from 6.4 s o 0.8 s epening on he pea signal/noise raio. 2. Wih he change of he pea values of he signal/noise raio from 44 o 37 b a a aa rae of he communicaion channel = 26 bps ransmission ime frame is reuce by an average of 45 %. Figure ransmission ime frames accoring o he meho evelope by a pea signal/noise raio ρ a a aa rae of he communicaion channel = 52 bps is shown in fig. 4. From he analysis of he char in fig. 4 i can be conclue ha he ime п frame for he ransmission of his meho a a aa rae of he communicaion channel = 52 bps is change from.6 s o 0.2 s epening on he pea signal/noise raio ρ. Figure ransmission ime frames accoring o he meho evelope by a pea signal/noise raio ρ a a aa rae of he communicaion channel = mbps is shown in fig. 5. From he analysis of he char in fig. 5 i can be conclue ha he ime frame for he ransmission of his meho a a aa rae of he communicaion channel = mbps ranges from 0.39 s o 0.05 s epening on he pea signal/noise raio ρ. Graph comparing he ransmission ime frames accoring o he pea signal/noise raio ρ a a aa rae of he communicaion channel = mbps an he evelope echnology base on MPEG echnology is shown in fig. 6. From he analysis of he char in fig. 6 he following conclusions:. A he pea signal/noise raio ρ of 44b up o 38.5 b a a aa rae of he communicaion channel = mbps ransmission ime п frame for echnology evelope by an average of 39% less han he ime frame for he ransfer of echnology MPEG. 2. A he pea signal/noise raio ρ 37b a a aa rae of he communicaion channel = mbps ransmission ime п frame for he evelope echnology an echnology for MPEG approximaely he same.

4 82 ISSN Science-Base Technologies (8) Fig. 4. A graph of he ransmission ime of he pea signal/noise raio ρ a = 52 bps Fig. 5. A graph of he ransmission ime of he pea signal/noise raio ρ a = mbps Fig. 6. Char comparing he ime o ransmi a frame a a spee image ransmission = mbps on he basis of he echnology an echnology-base MPEG 3. Time frame ransmission wih a aa rae of he communicaion channel = mbps a he pea signal/noise raio ρ 44 b for he evelope echnology for MPEG echnology will be he greaes. 4. Time frame ransmission wih a aa rae of he communicaion channel = mbps a he pea signal/noise raio ρ of 37 b an evelope echnology for MPEG echnology will be he smalles. Conclusions Develope a meho for evaluaion of he ime spen on processing an ransmission of compresse vieo which provie he following esimaes: ) epening on he hreshol Δ Р filering he encoing frame varies from 6.4 ms o 6. ms. Wih increasing hreshol values a he ime of encoing is reuce by an average 28%. 2) The ime frame for he coing of he echnology accoring o he percolaion hreshol is less han an average of 48 imes han he ime bloc coing echnology for MPEG. 3) when he pea signal/noise raio ρ of 44 o 37 b an increasing he aa rae of he communicaion channel uring ransmission of he frame is change from 6.4 s o 0.05 s. Depening on he pea signal/noise raio ρ an aa rae of he communicaion channel u-ring ransmission frame is reuce by an average 45%.

5 ISSN Science-Base Technologies (8) 83 4) evelope echnology provies real-ime epening on he percolaion hreshol which eermines he qualiy of he reconsruce image wih a aa rae of he communicaion channel mbps: he frame rae of b an ransfer ime from 0.39 c 2-3 frames per secon a a frame rae of 397 b an ransfer ime from 0.9 s 5 frames per secon a a frame rae of 47.4 b 4.7 b respecively an he ransfer ime o 0.07 s s o 4 frames per secon a a frame rae of 03.3 b an he ransmission ime of 0.05 s 20 frames per secon. 5) he ime frame ransmission epening on he values of he pea signal/noise raio ρ a a spee image ransmission = mbps for echnology evelope by an average of 39% less han he ime frame for he ransfer of echnology MPEG. REFERENCES. Selomon D. Daa compression image an soun/ D. Selomon M. : Technosphere p. ISBN Х. 2. Gonzales R. C. Digial image processing / R. C. Gonzales R. E. Woos. Prenice Inc. pper Sale River New Jersey p. 3. Baranni V. V. Coing ransforme images in he informaion an communicaion sysems / V. V. Baranni V. P. Polyov. K. :KAF p. 4. Leah A. A. The meho of processing he binary mas ifferenially represene in he frame of he objecive conrol sysems imaging / A. A. Leah A. V. Yaoveno / Curren special echnique S Leah A. A. Processing meho base on he ynamic componen of posiional coing wih aapive selecion of he base / A. A. Leah. Elecronics an Compuer Science P Aricle receive