published_or_final_version / Electrical Engineering / Master / Master of Philosophy

published_or_final_version / Computer Science and Information Systems / Master / Master of Philosophy

Šiame baigiamajame darbe atlikta analizė, kurioje gilinamasi į podcast`ingo privalumus ir pranašumus ir galimybes, lyginant su video transliavimu, dar kitaip vadinamu video „streaming“. Taip pat gilinamasi į tai, kokius pranašumus televizija turėtų prieš kitas, kurios nenaudoja podcast technologijos laidų anonsavimui žiūrovams. Ieškoma alternatyvių projektų, kuriuose bandoma padaryti kažką panašaus. Aprašant projektinius sprendimus, supažindinama su:  būsimu prototipu  televizijos reklamos sprendimas panaudojant podcast technologiją  terminalo tipo atpažinimas  atsiunčiamų transliacijos įrašų panaudojimas televizijos laidų reklamai pritaikymas pagal terminalo tipą  alternatyviu atsiunčiamų transliacijos įrašų panaudojimu televizijos laidų reklamai mobiliajame telefone Atlikus praktinius tyrimus, įsitikinome, kad padarytas prototipas veikia. Tiesa, turi šiokių tokiu trūkumų, kurie dar galėtu būti tobulinami ateityje. / This master `s work analystes advantage of podcasting versus video broadcasting, in other words – video streaming, video podcast expectation of using it. Also I will look through what advantage has Tv stations against these who don`t use podcast technology. Also, there will be looking for some similar podcast projects too. Solutions will be presented:  prototipe  advertisements of tv`s shows  identification of terminal  video announcement`s broadcasting using any type of terminal  video announcement`s broadcasting using mobile phones  alternative video announcement`s broadcasting on mobile phones. In conclusion we can see prototipe is working. In thruth it is not everything working perfect and it should be developed near in future.

With the rapid development of network visual communication technologies, digital video has become ubiquitous and indispensable in our everyday lives. Video acquisition, communication, and processing systems introduce various types of distortions, which may have major impact on perceived video quality by human observers. Effective and efficient objective video quality assessment (VQA) methods that can predict perceptual video quality are highly desirable in modern visual communication systems for performance evaluation, quality control and resource allocation purposes. Moreover, perceptual VQA measures may also be employed to optimize a wide variety of video processing algorithms and systems for best perceptual quality. This thesis exploits several novel ideas in the areas of video quality assessment and enhancement. Firstly, by considering a video signal as a 3D volume image, we propose a 3D structural similarity (SSIM) based full-reference (FR) VQA approach, which also incorporates local information content and local distortion-based pooling methods. Secondly, a reduced-reference (RR) VQA scheme is developed by tracing the evolvement of local phase structures over time in the complex wavelet domain. Furthermore, we propose a quality-aware video system which combines spatial and temporal quality measures with a robust video watermarking technique, such that RR-VQA can be performed without transmitting RR features via an ancillary lossless channel. Finally, a novel strategy for enhancing video denoising algorithms, namely poly-view fusion, is developed by examining a video sequence as a 3D volume image from multiple (front, side, top) views. This leads to significant and consistent gain in terms of both peak signal-to-noise ratio (PSNR) and SSIM performance, especially at high noise levels.

No description available.

No description available.

Šiandieninėje kultūroje, dar vadinamoje vaizdų kultūra, labai svarbią vietą užima technologijos, kurios sparčiai įsilieja ir į meno procesus. Meno ir technologijų sąveikos bei kūrybiškos naujų technologijų panaudojimo galimybės aktyviai atsispindi kūrybiniuose procesuose, tad darbe aptariami tarpdisciplininiai kontekstai, sietini su šiuolaikine Lietuvos tekstile ir jos sąsajomis su videomeno formomis. Meninės tekstilės santykio su video raiška tema Lietuvoje iki šiol plačiau netyrinėta, nors pastaraisiais metais vis daugiau kūrėjų ieškodami įdomesnių ir išskirtinesnių raiškos būdų pasitelkia video raišką praktiniam kūrinio įgyvendinimui. Tad šiame darbe tarpdiscipliniškumas šiuolaikinėje tekstilėje apmąstomas iš praktinės perspektyvos, pabrėžiant jos santykį su video. Surinkti pavyzdžiai iliustruoja šiandienines tendencijas ir menininkų poreikį judančio vaizdo buvimui. Nagrinėjamos aktualios temos – kodėl tekstilės meno atstovai renkasi video raišką greta tekstilės ir ką duoda šių dviejų raiškų jungtis, kaip viena kitą papildo. Į kylančius klausimus bandoma atsakyti apžvelgiant ir analizuojant šiuolaikinės Lietuvos tekstilės meninį lauką bei bendraujant su pačiais kūrėjais. Susisteminti išsamūs interviu pateikiami prieduose. Tyrimo metu nustatyta, kad video atsiradimas šiuolaikinės Lietuvos tekstilės lauke leidžia kvestionuoti tekstilės kaip dailės šakos daugialypiškumą, bei pačios materijos kaip jungties su šiuolaikinėmis medijomis svarumą vaizdų kultūros plotmėje... [toliau žr. visą tekstą] / In contemporary culture, also called the culture of images, technology is playing a very important role as it is being rapidly involved in art processes. Interaction of arts with technology and the possibilities of involving new technologies in creating arts are actively reflected in creative processes, so in this work is discussed the interdisciplinary contexts, which are linked with contemporary Lithuanian textile and its relation with different form of video art. Even though during recent years many artists choose to use video resolution in order to present their work in a more interesting and unusual way, until now the relation between textile as a form of art and video usage was not thoroughly discussed in Lithuania. Therefore in this work the interdisciplinarity of contemporary textile is presented from the practical side while underlining its collaboration with video art. Gathered examples indicates modern trends and artists needs to have a moving images. Important topics are analyzed – why representatives of textile arts choose to use video usage next to textile and what is the purpose of this combination, how does it supplement each other. The raised question are being tried to answer while analyzing Lithuanian field of textile arts and while discussing with the artists themselves. Structured detailed interviews are attached in the appendix. The investigation has reveled that the appearance of video in the field of contemporary Lithuanian field of textile allows us... [to full text]

Šiandieninėje kultūroje, dar vadinamoje vaizdų kultūra, labai svarbią vietą užima technologijos, kurios sparčiai įsilieja ir į meno procesus. Meno ir technologijų sąveikos bei kūrybiškos naujų technologijų panaudojimo galimybės aktyviai atsispindi kūrybiniuose procesuose, tad darbe aptariami tarpdisciplininiai kontekstai, sietini su šiuolaikine Lietuvos tekstile ir jos sąsajomis su videomeno formomis. Meninės tekstilės santykio su video raiška tema Lietuvoje iki šiol plačiau netyrinėta, nors pastaraisiais metais vis daugiau kūrėjų ieškodami įdomesnių ir išskirtinesnių raiškos būdų pasitelkia video raišką praktiniam kūrinio įgyvendinimui. Tad šiame darbe tarpdiscipliniškumas šiuolaikinėje tekstilėje apmąstomas iš praktinės perspektyvos, pabrėžiant jos santykį su video. Surinkti pavyzdžiai iliustruoja šiandienines tendencijas ir menininkų poreikį judančio vaizdo buvimui. Nagrinėjamos aktualios temos – kodėl tekstilės meno atstovai renkasi video raišką greta tekstilės ir ką duoda šių dviejų raiškų jungtis, kaip viena kitą papildo. Į kylančius klausimus bandoma atsakyti apžvelgiant ir analizuojant šiuolaikinės Lietuvos tekstilės meninį lauką bei bendraujant su pačiais kūrėjais. Susisteminti išsamūs interviu pateikiami prieduose. Tyrimo metu nustatyta, kad video atsiradimas šiuolaikinės Lietuvos tekstilės lauke leidžia kvestionuoti tekstilės kaip dailės šakos daugialypiškumą, bei pačios materijos kaip jungties su šiuolaikinėmis medijomis svarumą vaizdų kultūros plotmėje... [toliau žr. visą tekstą] / In contemporary culture, also called the culture of images, technology is playing a very important role as it is being rapidly involved in art processes. Interaction of arts with technology and the possibilities of involving new technologies in creating arts are actively reflected in creative processes, so in this work is discussed the interdisciplinary contexts, which are linked with contemporary Lithuanian textile and its relation with different form of video art. Even though during recent years many artists choose to use video resolution in order to present their work in a more interesting and unusual way, until now the relation between textile as a form of art and video usage was not thoroughly discussed in Lithuania. Therefore in this work the interdisciplinarity of contemporary textile is presented from the practical side while underlining its collaboration with video art. Gathered examples indicates modern trends and artists needs to have a moving images. Important topics are analyzed – why representatives of textile arts choose to use video usage next to textile and what is the purpose of this combination, how does it supplement each other. The raised question are being tried to answer while analyzing Lithuanian field of textile arts and while discussing with the artists themselves. Structured detailed interviews are attached in the appendix. The investigation has reveled that the appearance of video in the field of contemporary Lithuanian field of textile allows us... [to full text]

The research reported in this thesis investigates the performance of the transport layer Stream Control Transfer Protocol (SCTP) for streaming video over CDMA2000 cellphone and data wireless networks. The main measure of performance was quality of the received video at a given buffer size, as cellphones have memory of limited capacity. The hypothesis was that SCTP would be able to improve the quality of streamed video over UDP under the same memory requirements. Our study involved two series of simulation experiments and measurements in a testbed on the Telecom NZ CDMA2000 network, to test the performance of video streaming under SCTP and under UDP. It was found that SCTP did not improve the quality in streamed video with up to 5 second buffers. While other scenarios that have been tested by other people with high packet loss or congestion have shown that SCTP can improve the quality, the CDMA2000 network does not suffer from the impairments that SCTP could neutralise, and because of that, in this scenario, the quality of video streaming under SCTP and UDP are similar. The complexity that SCTP adds does not correspond to an increase in quality.

The relationships between violent content and aggression have not been fully understood and explained in video game research literature. This study sought to determine if video game players" flow experience--a psychological absorption—explains the aggression that can follow video game playing. Employing a survey, this project sought to determine if relationships existed among degrees of violence portrayed in video games, degrees of flow experience, and subsequent aggressive attitudes after gaming. In this study, it was determined that a player's flow experience is more strongly correlated with aggression than is the violent content of video games. Moreover, contradicting the common belief that the video game companies make more profit by increasing the quantity of violent content, there is actually no significant relationship between violence and purchase of video games. However, along the same lines of Hoffman and Novak (1977), this study discovered an increase in purchasing intent related to flow experiences in video games. / Department of Telecommunications