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Journal articles on the topic 'Codec2'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

Korobeynikov, A. V., M. A. Boyarshinov, A. I. Nistyuk, and V. N. Emelianov. "Using the Standard P.862 to Compare the Quality of Low-Bitrate Vocoders." Intellekt. Sist. Proizv. 16, no. 4 (2019): 109. http://dx.doi.org/10.22213/2410-9304-2018-4-109-113.

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Рассматриваются объективные методы оценки качества речевого сигнала: 1) Perceptual Evaluation of Speech (PESQ, рекомендация МСЭ-T P.862) - оценка восприятия качества речи, 2) Listening Quality Objective (LQO, рекомендация, МСЭ-T P.800.1) - качество прослушивания. Приведено краткое описание и схемы работы методики PESQ и формулы для преобразования оценок Raw MOS в MOS-LQO и обратно. Для тестирования были выбраны низкоскоростные вокодеры: 1) MEPLe, 2) Speex, 3) Codec2. Тестирование вокодеров проводилось на битовых скоростях от 700 до 4800 бит/с. Для тестирования использовались аудиофайлы артикул

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Susiani Pande, Putu Sintia, Pande Ketut Sudiarta, and I. Made Oka Widyantara. "PENGUKURAN KINERJA VOIP DENGAN CODEC G.711?, G.711a DAN G.729 DI MEDIA TRANSMISI NIRKABEL BERBASIS SIP DAN IAX." Jurnal SPEKTRUM 5, no. 1 (2018): 21. http://dx.doi.org/10.24843/spektrum.2018.v05.i01.p04.

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Voice over Internet Protocol (VoIP) is a technology that can send real-time data with IP-based networks (Internet Protocol). In VoIP technology with wireless network has several problems that cause the performance of the network to be varied due to the QoS (Quality of Service) include delay, jitter, packet loss and MOS that affect the wireless network. This research uses G.711?, G.711a and G.729 codec based on SIP and IAX server on wireless network which then the QoS result from each codec compared with ITU-T standard which become the reference of whether the network is good or not so that lat

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Gunawan, Teddy Surya, Muhammad Khalif Mat Zain, Fathiah Abdul Muin, and Mira Kartiwi. "Investigation of Lossless Audio Compression using IEEE 1857.2 Advanced Audio Coding." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (2017): 422. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp422-430.

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<p>Audio compression is a method of reducing the space demand and aid transmission of the source file which then can be categorized by lossy and lossless compression. Lossless audio compression was considered to be a luxury previously due to the limited storage space. However, as storage technology progresses, lossless audio files can be seen as the only plausible choice for those seeking the ultimate audio quality experience. There are a lot of commonly used lossless codecs are FLAC, Wavpack, ALAC, Monkey Audio, True Audio, etc. The IEEE Standard for Advanced Audio Coding (IEEE 1857.2)

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Pratama, Aditya. "Practicum Module Design and Comparative Analysis of Codecs for VoIP." Jurnal Jartel: Jurnal Jaringan Telekomunikasi 3, no. 2 (2016): 7–13. http://dx.doi.org/10.33795/jartel.v3i2.214.

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Several types of codecs in VoIP are G.711, iLBC, GSM and Speex. This study aims to compare the quality of calls through different codecs and design a VoIP practicum module for students. The research method was carried out by conducting literature studies, planning network design, device configuration, determining QoS parameters and testing VoIP calls to determine the quality of VoIP calls through different codecs. From the analysis, it is found that G.711 is an audio codec with very good QoS parameters, namely a delay of 5.28 ms; jitter 5.12 ms; 347.04 kbps throughput, 0% packet loss, and 64 k

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Zhang, Jian Ru, Kai Du, Hao Tian, and Yong Feng Ju. "Research of Compatibility Quality Objective Evaluation Method of H.264 Video Codec Based on Compatibility Matrix." Applied Mechanics and Materials 556-562 (May 2014): 5582–86. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.5582.

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To evaluate the compatibility quality of various H.264 codecs, and promote H.264 codec benign competition in the market, this paper proposes an objective evaluation method. Firstly, this method adopts video distributor, video capture card and other facilities to collect two-way videos, one of which is reference video, and the other is the video encoded and decoded respectively; Then it utilizes SSIM algorithm to find "the best similar frame" between the two videos in order to solve the problem of “Homologous Asynchronous”; Finally, it establishes codec compatibility matrix which can objectivel

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Das, Mousumi, Atahar Mostafa, and Khan Wahid. "Division-Free Multiquantization Scheme for Modern Video Codecs." Advances in Multimedia 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/302893.

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The current trend of digital convergence leads to the need of the video encoder/decoder (codec) that should support multiple video standards on a single platform as it is expensive to use dedicated video codec chip for each standard. The paper presents a high performance circuit shared architecture that can perform the quantization of five popular video codecs such as H.264/AVC, AVS, VC-1, MPEG-2/4, and JPEG. The proposed quantizer architecture is completely division-free as the division operation is replaced by shift and addition operations for all the standards. The design is implemented on

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Gibson, Jerry. "Mutual Information, the Linear Prediction Model, and CELP Voice Codecs." Information 10, no. 5 (2019): 179. http://dx.doi.org/10.3390/info10050179.

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We write the mutual information between an input speech utterance and its reconstruction by a code-excited linear prediction (CELP) codec in terms of the mutual information between the input speech and the contributions due to the short-term predictor, the adaptive codebook, and the fixed codebook. We then show that a recently introduced quantity, the log ratio of entropy powers, can be used to estimate these mutual informations in terms of bits/sample. A key result is that for many common distributions and for Gaussian autoregressive processes, the entropy powers in the ratio can be replaced

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Afrianto, Yuggo, Maswan Maswan, and Eko Hadi. "Analisis Kinerja ROIP Gateway Menggunakan TeamSpeak 3 Pada Komunitas RAPI Dengan Frequency 141,470 MHZ." KREA-TIF 6, no. 1 (2018): 10. http://dx.doi.org/10.32832/kreatif.v6i1.2193.

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<h1 align="center"><strong>Abstraks</strong></h1><p>HT (Handy Talkie) saat ini masih menjadi salah satu perangkat komunikasi radio yang banyak digunakan oleh suatu organisasi ataupun komunitas. HT mudah digunakan dan tidak memerlukan biaya dalam penggunaanya, namun memiliki keterbatasan di perangkat dan kemampuan jangkuan komunikasinya. Sistem ROIP (Radio Over IP) gateway berfungsi untuk menghubungkan komunikasi data analog radio ke digital komputer atau smartphone. Sehingga permasalahan interoperabiltas perangkat dan jangkauan tidak lagi menjadi suatu permasalaha

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Vybornova, A. "A SURVEY ON HAPTIC CODEC DESIGN APPROACHES." Telecom IT 7, no. 1 (2019): 31–40. http://dx.doi.org/10.31854/2307-1303-2019-7-1-31-40.

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Tactile communication as a part of Tactile Internet concept now is one of the most promising research areas in telecommunications. Methods and approaches to design tactile codec, as well as equipment for the tactile sensation capture and display were the research subject of this work. As a research method author engaged collection and analysis of the known approaches to the subject of research. Core result. In this article author provide a survey of tactile data capture and display methods. Additionally, author propose a promising approach to the tactile codecs design, where vibration with sam

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Sapunova, E., S. Leontiev, and A. Vybornova. "Traffic analysis for a parametric tactile codec." Telecom IT 8, no. 2 (2020): 67–76. http://dx.doi.org/10.31854/2307-1303-2020-8-2-67-76.

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This article is devoted to the haptic communications types and methods. Haptic and tactile codecs were the research subject. As a research method authors engaged analysis of the current research re-sults in the area, research and development of the parametric tactile codec, as well as statistical analysis of the obtained tactile traffic. Core result. In this article authors provide a classification of the haptic interactions and tactile codes approaches. The other result of the work is a simple parametric tactile co-dec. Also, authors have found out that such type of codec created quite intens

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Jang, Bong-Joo, Suk-Hwan Lee, Young-Suk Lee, and Ki-Ryong Kwon. "Biological Viral Infection Watermarking Architecture of MPEG/H.264/AVC/HEVC." Electronics 8, no. 8 (2019): 889. http://dx.doi.org/10.3390/electronics8080889.

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This paper addresses the viral infectious watermarking (VIW) model using biological virus infection for a new-paradigm of video copyright protection of MPEG/H.264/AVC/HEVC. Our model aims to spread or infect the watermark to different codecs each time video contents are copied, edited, or transcoded. Thus, we regard the watermark as the infectious virus, the video content as the host, and the video codec as the contagion medium and then model pathogen, mutant, and contagion as the infectious watermark. Then, we define the techniques of viral infectious watermark generation, kernel-based VIW, a

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Shikakura, Akihiro, and Yoshimichi Ohtsuka. "Recent Technologies of Digital Broadcasting System. Recent Codec Equipments. HDTV Codecs." Journal of the Institute of Television Engineers of Japan 47, no. 4 (1993): 482–85. http://dx.doi.org/10.3169/itej1978.47.482.

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Uhl, Tadeus, and Christian Hoppe. "A New Parameterized Model for Determining Quality of Online Video Service Using Modern H.265/HEVC and VP9 Codecs." Journal of Telecommunications and Information Technology 4 (December 30, 2020): 72–78. http://dx.doi.org/10.26636/jtit.2020.146220.

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This paper describes a new measurement method (VS model) for determining the quality of online video services relying on modern H.265/HEVC and VP9 codecs. The said method has been developed on the basis of VQuad-HD curves (according to ITU-T J.341). This model does not refer to signal analysis, but protocol analysis instead. The parameters used are: type of video codec, encoding rate, transport technique, packet loss and burst size. The method may be implemented quickly and easily, which is one of the great advantages when using this method to measure QoS.

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Lara-Cueva, Roman Alcides, and Michael Santiago Simba-Herrera. "Performance evaluation for outdoor wireless scenarios based on IEEE 802.11b/g in the presence of co-channel interference." Bulletin of Electrical Engineering and Informatics 9, no. 1 (2020): 187–97. http://dx.doi.org/10.11591/eei.v9i1.1649.

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Voice over Internet Protocol (VoIP) has evolved over the years, being a real-time service. VoIP has been coupled to different technologies, one of them is WiFi, which is one of the most used for wireless local area networks in domestic and commercial environments. In this paper, we evaluate the performance of wireless scenarios by considering VoIP traffic, based on WiFi technology in conformance with IEEE 802.11b/g in interfered outdoor scenarios, by considering an intrusive injection traffic technique, for codecs G711 (1 sample), G711 (2 samples), G723, G729 (2 samples), and G729 (3 samples),

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Phillips, Peter, Kyle Schiefelbein-Guerrero, and Jonas Kurlberg. "Defining Digital Theology: Digital Humanities, Digital Religion and the Particular Work of the CODEC Research Centre and Network." Open Theology 5, no. 1 (2019): 29–43. http://dx.doi.org/10.1515/opth-2019-0003.

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AbstractThis article seeks to define Digital Theology, first by exploring the development of the CODEC Research Centre at Durham University – perhaps the only centre developed to explore Digital Theology. The aims of the centre and some of its projects are explored leading to a discussion of CODEC’s place within Digital Humanities. The article concludes with a focus on different aspects and definitions of Digital Theology.

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Arzumanyan, R. V. "Arithmetic coder optimization for compressing images obtained through remote probing of water bodies." Vestnik of Don State Technical University 19, no. 1 (2019): 86–92. http://dx.doi.org/10.23947/1992-5980-2019-19-1-86-92.

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Introduction.The fast program algorithm of arithmetic coding proposed in the paper is for the compression of digital images. It is shown how the complexity of the arithmetic coder algorithm depends on the complexity measures (the input size is not considered). In the course of work, the most computationally complex parts of the arithmetic coder algorithm are determined. Performance optimization of their software implementation is carried out. Codecs with the new algorithm compress photo and video records obtained through the remote probing of water bodies without frame-to-frame difference.Mate

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Guimarães, Almir Pereira, Dênis Da Silva Rodrigues, and Bruno Costa e. Silva Nogueira. "Performability Evaluation of Voice Services in Converged Networks." Revista de Informática Teórica e Aplicada 27, no. 4 (2020): 11–19. http://dx.doi.org/10.22456/2175-2745.94016.

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In the last years, the transmission of voice services in converged networks has experienced a huge growth. However, there are still some questions considering the ability of these networks to deliver voice services with acceptable quality. In this paper, we applied analytical modeling and simulation to analyze the quality of voice services using a new index, called MOS a , which considers jointly the MOS index and the availability of the subjacent infrastructure. We consider the influence of different CODECs (G.711 and G.729), queuing policies (Priority Queuing and Custom Queuing), and the war

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Kang, Sang-Ick, and Sangmin Lee. "Improvement of Speech/Music Classification for 3GPP EVS Based on LSTM." Symmetry 10, no. 11 (2018): 605. http://dx.doi.org/10.3390/sym10110605.

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The competition of speech recognition technology related to smartphones is now getting into full swing with the widespread internet of thing (IoT) devices. For robust speech recognition, it is necessary to detect speech signals in various acoustic environments. Speech/music classification that facilitates optimized signal processing from classification results has been extensively adapted as an essential part of various electronics applications, such as multi-rate audio codecs, automatic speech recognition, and multimedia document indexing. In this paper, we propose a new technique to improve

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Trieu Duong, Dinh, Huy Phi Cong, and Xiem Hoang Van. "A Novel Consistent Quality Driven for JEM Based Distributed Video Coding." Algorithms 12, no. 7 (2019): 130. http://dx.doi.org/10.3390/a12070130.

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Distributed video coding (DVC) is an attractive and promising solution for low complexity constrained video applications, such as wireless sensor networks or wireless surveillance systems. In DVC, visual quality consistency is one of the most important issues to evaluate the performance of a DVC codec. However, it is the fact that the quality of the decoded frames that is achieved in most recent DVC codecs is not consistent and it is varied with high quality fluctuation. In this paper, we propose a novel DVC solution named Joint exploration model based DVC (JEM-DVC) to solve the problem, which

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Coelho, Diego F. G., Renato J. Cintra, Fábio M. Bayer, et al. "Low-Complexity Loeffler DCT Approximations for Image and Video Coding." Journal of Low Power Electronics and Applications 8, no. 4 (2018): 46. http://dx.doi.org/10.3390/jlpea8040046.

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This paper introduced a matrix parametrization method based on the Loeffler discrete cosine transform (DCT) algorithm. As a result, a new class of 8-point DCT approximations was proposed, capable of unifying the mathematical formalism of several 8-point DCT approximations archived in the literature. Pareto-efficient DCT approximations are obtained through multicriteria optimization, where computational complexity, proximity, and coding performance are considered. Efficient approximations and their scaled 16- and 32-point versions are embedded into image and video encoders, including a JPEG-lik

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Lebl, Aleksandar, Dragan Mitic, Vladimir Matic, Mladen Mileusnic, and Zarko Markov. "A novel method for the codecs’ performance analysis in mobile telephony systems." Facta universitatis - series: Electronics and Energetics 33, no. 2 (2020): 243–59. http://dx.doi.org/10.2298/fuee2002243l.

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This paper presents a novel method of expressing the quality of service in a mobile telecommunication system when its performance depends on several factors including applied codecs? characteristics (voice quality and data flow rate) and telecommunications traffic service possibilities. The influence of these factors is unified in one variable - quality of service measure. The proposed method is especially applicable in the cases when two-dimensional systems are analyzed - for example when two codecs with different flow rate and different achievable connection quality are used in a system. As

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Meliones, A., E. Touloupis, and J. Perello. "Embedded Parallelism Enabling Ultralow-Power Zigbee Voice Communications." Journal of Computer Networks and Communications 2019 (February 5, 2019): 1–14. http://dx.doi.org/10.1155/2019/6595282.

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Short-range wireless technologies are known to transmit voice, audio, image, and video messages in real time. Energy consumption and transmission reach are critical in such networks, especially for portable and power autonomous devices. The purpose of the Voice over Zigbee technology is to provide a competitive offering that excels in these performance aspects. Due to the CSMA-CA mechanism implemented in the 802.15.4 layer, a well-designed strategy must be considered in Zigbee to create a robust, reliable, and full-duplex conversation. In past efforts, we proved that the radio channel of Zigbe

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Bone, Donald J. "Orthonormal Fractal Image Encoding Using Overlapping Blocks." Fractals 05, supp01 (1997): 187–99. http://dx.doi.org/10.1142/s0218348x97000759.

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This paper presents a novel approach to partitioned fractal image encoding. In this we seek to address a number of problems with earlier fractal encodings. These are: the artefacts associated with the block based approaches at high compression ratios; accuracy limitations imposed by the constraint that only one domain block is used to construct each range block; convergence problems which have required that constraints be imposed on the scaling coefficients to ensure that the mapping functions are contractive. These problems are addressed with a technique based on an orthonormal basis expansio

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Alsarayreh, Mahmoud, and Hussein Alzoubi. "GME of MPEG-4 on Multicore Processors." International Journal of Computer Vision and Image Processing 7, no. 4 (2017): 16–27. http://dx.doi.org/10.4018/ijcvip.2017100102.

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Multicore processor systems are leading the microprocessor industry today. This has placed more pressure upon programmers to write parallel programs that wisely balance load among cores on the same system and optimize performance. On the other hand, the video-form of data is getting more and more importance. Video is the fuel for many contemporary Internet applications like YouTube. Video is the most storage and bandwidth-hungry type of data, especially in the context of new video applications like HDTV and IPTV. Exploiting video compression manifests itself in real-time applications. In light

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Voges, Jan, Tom Paridaens, Fabian Müntefering, et al. "GABAC: an arithmetic coding solution for genomic data." Bioinformatics 36, no. 7 (2019): 2275–77. http://dx.doi.org/10.1093/bioinformatics/btz922.

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Abstract Motivation In an effort to provide a response to the ever-expanding generation of genomic data, the International Organization for Standardization (ISO) is designing a new solution for the representation, compression and management of genomic sequencing data: the Moving Picture Experts Group (MPEG)-G standard. This paper discusses the first implementation of an MPEG-G compliant entropy codec: GABAC. GABAC combines proven coding technologies, such as context-adaptive binary arithmetic coding, binarization schemes and transformations, into a straightforward solution for the compression

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Palau, Roberta De Carvalho Nobre, Bianca Santos da Cunha Silveira, Robson André Domanski, et al. "Modern Video Coding: Methods, Challenges and Systems." Journal of Integrated Circuits and Systems 16, no. 2 (2021): 1–12. http://dx.doi.org/10.29292/jics.v16i2.503.

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With the increasing demand for digital video applications in our daily lives, video coding and decoding become critical tasks that must be supported by several types of devices and systems. This paper presents a discussion of the main challenges to design dedicated hardware architectures based on modern hybrid video coding formats, such as the High Efficiency Video Coding (HEVC), the AOMedia Video 1 (AV1) and the Versatile Video Coding (VVC). The paper discusses eachstep of the hybrid video coding process, highlighting the main challenges for each codec and discussing the main hardware solutio

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Uhrina, Miroslav, Anna Holesova, Juraj Bienik, and Lukas Sevcik. "Impact of Scene Content on High Resolution Video Quality." Sensors 21, no. 8 (2021): 2872. http://dx.doi.org/10.3390/s21082872.

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This paper deals with the impact of content on the perceived video quality evaluated using the subjective Absolute Category Rating (ACR) method. The assessment was conducted on eight types of video sequences with diverse content obtained from the SJTU dataset. The sequences were encoded at 5 different constant bitrates in two widely video compression standards H.264/AVC and H.265/HEVC at Full HD and Ultra HD resolutions, which means 160 annotated video sequences were created. The length of Group of Pictures (GOP) was set to half the framerate value, as is typical for video intended for transmi

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Nehme, Ali, Hassan Dakik, Frédéric Picou, et al. "Horizontal meta-analysis identifies common deregulated genes across AML subgroups providing a robust prognostic signature." Blood Advances 4, no. 20 (2020): 5322–35. http://dx.doi.org/10.1182/bloodadvances.2020002042.

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Abstract Advances in transcriptomics have improved our understanding of leukemic development and helped to enhance the stratification of patients. The tendency of transcriptomic studies to combine AML samples, regardless of cytogenetic abnormalities, could lead to bias in differential gene expression analysis because of the differential representation of AML subgroups. Hence, we performed a horizontal meta-analysis that integrated transcriptomic data on AML from multiple studies, to enrich the less frequent cytogenetic subgroups and to uncover common genes involved in the development of AML an

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Edan, Naktal, and Sanabil A. Mahmood. "Design and implement a new mechanism for audio, video and screen recording based on WebRTC technology." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 3 (2020): 2773. http://dx.doi.org/10.11591/ijece.v10i3.pp2773-2778.

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Many years ago, Flash was essential in browsers to interact with the user media devices, such as a microphone and camera. Today, Web Real-Time Communication (WebRTC) technology has come to substitute the flash, so browsers do not need the flash to access media devices or establish their communication. However, WebRTC standards do not express precisely how browsers can record audios, videos or screen instead of describing getUserMedia API that enables a browser to access microphone and camera. The prime objective of this research is to create a new WebRTC recording mechanism to record audios, v

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Cunningham, Stuart, and Iain McGregor. "Subjective Evaluation of Music Compressed with the ACER Codec Compared to AAC, MP3, and Uncompressed PCM." International Journal of Digital Multimedia Broadcasting 2019 (July 11, 2019): 1–16. http://dx.doi.org/10.1155/2019/8265301.

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Audio data compression has revolutionised the way in which the music industry and musicians sell and distribute their products. Our previous research presented a novel codec named ACER (Audio Compression Exploiting Repetition), which achieves data reduction by exploiting irrelevancy and redundancy in musical structure whilst generally maintaining acceptable levels of noise and distortion in objective evaluations. However, previous work did not evaluate ACER using subjective listening tests, leaving a gap to demonstrate its applicability under human audio perception tests. In this paper, we pre

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Yeh, Cheng-Yu, and Hung-Hsun Huang. "An Upgraded Version of the Binary Search Space-Structured VQ Search Algorithm for AMR-WB Codec." Symmetry 11, no. 2 (2019): 283. http://dx.doi.org/10.3390/sym11020283.

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Adaptive multi-rate wideband (AMR-WB) speech codecs have been widely used for high speech quality in modern mobile communication systems, e.g., handheld mobile devices. Nevertheless, a major handicap is that a remarkable computational load is required in the vector quantization (VQ) of immittance spectral frequency (ISF) coefficients of an AMR-WB coding. In view of this, a two-stage search algorithm is presented in this paper as an efficient way to reduce the computational complexity of ISF quantization in AMR-WB coding. At stage 1, an input vector is assigned to a search subspace in an effici

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Kwan, Chiman, Jude Larkin, Bence Budavari, Bryan Chou, Eric Shang, and Trac D. Tran. "A Comparison of Compression Codecs for Maritime and Sonar Images in Bandwidth Constrained Applications." Computers 8, no. 2 (2019): 32. http://dx.doi.org/10.3390/computers8020032.

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Since lossless compression can only achieve two to four times data compression, it may not be efficient to deploy lossless compression in bandwidth constrained applications. Instead, it would be more economical to adopt perceptually lossless compression, which can attain ten times or more compression without loss of important information. Consequently, one can transmit more images over bandwidth limited channels. In this research, we first aimed to compare and select the best compression algorithm in the literature to achieve a compression ratio of 0.1 and 40 dBs or more in terms of a performa

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Kaul, Siddarth, and Anuj Jain. "Opus and Session Initiation Protocol Security in Voice over IP (VOIP )." European Journal of Engineering Research and Science 4, no. 12 (2019): 27–37. http://dx.doi.org/10.24018/ejers.2019.4.12.1625.

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The purpose of the paper is to clearly elaborate how Opus Codec can be used as Voice over IP or Unified Communication as known Opus is an Audio Codec which is royalty free and most versatile format of Audio Codec the Opus codec is used for Interactive Voice and Multimedia application, Opus codec with WEBRTC (Web Real Time Communication) is a framework based on the Chrome Web Browser the codec behavior is usually effectively utilized under testing conditions for understanding the MOS assessment in comparison to the Opus Codec.The Opus codec is generally a low latency codec used for real time in

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Testoni, Vanessa, and Max H. M. Costa. "Entropy coders and 3D-Hadamard coefficients sequency scan order for a fast embedded color video codec." Computers & Electrical Engineering 36, no. 4 (2010): 676–90. http://dx.doi.org/10.1016/j.compeleceng.2008.11.018.

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Gantenbein, Rex E., and Barbara J. Robinson. "Decoding CODECs." Journal of Telemedicine and Telecare 14, no. 2 (2008): 59–61. http://dx.doi.org/10.1258/jtt.2007.070810.

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Riesco-Chueca, Pascual, and Alfonso M Gañán-Calvo. "Microfluidic Codecs." Small 3, no. 7 (2007): 1140–42. http://dx.doi.org/10.1002/smll.200700194.

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Saputra, Indra, Harun Mukhtar, and Januar Al Amien. "Analisis Perbandingan Performa Codec H.264 & H.265 Video Streaming Dari Segi Quality of Service." Jurnal CoSciTech (Computer Science and Information Technology) 2, no. 1 (2021): 9–13. http://dx.doi.org/10.37859/coscitech.v2i1.2190.

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Video streaming is a technology that is often used when watching videos on the internet without having to download then video to play it. Some problems that affect the performance of video streaming are such as the large capacity of the video size, the capacity of the video size affects the smoothness when streaming video. In this research, two video compression methods will be compared, namely H.264 codec and H.265 codec. The test is carried out to determine the effect of using the compression method according to changes in the codec ang framerate used. After testing the two codec, it can be

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Maturana-Espinosa, José Carmelo, Juan Pablo García-Ortiz, Daniel Müller, and Vicente González-Ruiz. "Layer Selection in Progressive Transmission of Motion-Compensated JPEG2000 Video." Electronics 8, no. 9 (2019): 1032. http://dx.doi.org/10.3390/electronics8091032.

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MCJ2K (Motion-Compensated JPEG2000) is a video codec based on MCTF (Motion- Compensated Temporal Filtering) and J2K (JPEG2000). MCTF analyzes a sequence of images, generating a collection of temporal sub-bands, which are compressed with J2K. The R/D (Rate-Distortion) performance in MCJ2K is better than the MJ2K (Motion JPEG2000) extension, especially if there is a high level of temporal redundancy. MCJ2K codestreams can be served by standard JPIP (J2K Interactive Protocol) servers, thanks to the use of only J2K standard file formats. In bandwidth-constrained scenarios, an important issue in MC

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Darmawan, Darmawan, and Yayan Syafriyatno. "Analisa Perbandingan Quality of Service Voice Over IP dengan Pengujian Codec Menggunakan Algoritma Low Latency Queuing." Jurnal Nasional Teknologi dan Sistem Informasi 3, no. 2 (2017): 249–54. http://dx.doi.org/10.25077/teknosi.v3i2.2017.249-254.

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Voice over IP (VoIP) adalah solusi komunikasi suara yang murah karena menggunakan jaringan IP dibanding penggunaan telephone analog yang banyak memakan biaya. Dalam penerapannya, VoIP mengalami permasalahan karena menggunakan teknologi packet switching yang mana penggunaannya bersamaan dengan paket data sehingga timbul delay, jitter, dan packet loss. Pada penelitian ini, algoritma Low Latency Queuing (LLQ) diterapkan pada router cisco. Algoritma LLQ merupakan gabungan dari algoritma Priority Queuing (PQ) dan Class Based Weight Fair Queuing (CBWFQ) sehingga dapat memprioritaskan paket suara dis

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Oujezdský, Aleš. "Optimizing Video Clips in Educational Materials." International Journal of Information and Communication Technologies in Education 1, no. 2 (2012): 68–79. http://dx.doi.org/10.1515/ijicte-2012-0006.

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Abstract The use of videos from digital camcorders has become a standard in education in recent years. The curriculum is easily accessible and appeals to a wider audience. The lessons use videos of various physical processes and chemical experiments. However there can be problems with this format. The video quality is often degraded in the final stage when the video is being prepared for placement in education. These include teaching materials in the form of web pages, elearning courses or flash multimedia objects. The final product of editing video from a digital camcorder is a DVD video. How

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MAEDA, Toshiyuki. "JPEG Codec." Journal of Japan Society for Fuzzy Theory and Systems 11, no. 2 (1999): 259–62. http://dx.doi.org/10.3156/jfuzzy.11.2_75.

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Fujimoto, Mitsuo. "Speech codec." Journal of the Acoustical Society of America 100, no. 5 (1996): 2904. http://dx.doi.org/10.1121/1.417153.

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Ismail, Mohd Nazri. "Best Approach for Video Codec Selection Over VoIP Conversation Using Wireless Local Area Network." International Journal of Interdisciplinary Telecommunications and Networking 3, no. 1 (2011): 36–49. http://dx.doi.org/10.4018/jitn.2011010103.

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This study evaluates video codec performance over VoIP using a campus wireless network. Today, the deployment of VoIP occurs in various platforms, including VoIP over LAN, VoIP over WAN and VoIP over VPN. Therefore, this study defines which video codec provides good video quality over VoIP transmission. The soft phone is used as a medium for communication between two parties. A network management system is used to evaluate and capture the video quality performance over VoIP. The quality of video codec is based on MOS, jitter, delay and packet loss. The experimental scope is limited to G.722 wi

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Wang, Lin, Xingfu Wang, Ammar Hawbani, Yan Xiong, and Xu Zhang. "Rethinking Separable Convolutional Encoders for End-to-End Semantic Image Segmentation." Mathematical Problems in Engineering 2021 (April 16, 2021): 1–12. http://dx.doi.org/10.1155/2021/5566691.

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With the development of science and technology, the middle volume and neural network in the semantic image segmentation of the codec show good development prospects. Its advantage is that it can extract richer semantic features, but this will cause high costs. In order to solve this problem, this article mainly introduces the codec based on a separable convolutional neural network for semantic image segmentation. This article proposes a codec based on a separable convolutional neural network for semantic image segmentation research methods, including the traditional convolutional neural networ

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Wang, Hui Yang, Xiang Dong You, and Hao Pan. "A Solution to Improving the Performance of VVOIP Based on C-Native Android OS." Applied Mechanics and Materials 380-384 (August 2013): 2067–70. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.2067.

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VVOIP is an extended application from VOIP, and just because of the video function VVOIP is more complicated than VOIP, for video processing, video capturing, video codec and video transmission need more CPU processing power and net bandwidth. In this paper, a hardware codec solution is proposed to improve the performance of the VVOIP application based on Android OS. Video hardware codec can help decrease the load of mobile devices CPU, leaving users enjoying more applications at the same time. The hardware-codec VVOIPs performance of VGA-size is 15%-20% better than the unimproved one through

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Rodriguez, A. A., and K. Morse. "Evaluating Video Codecs." IEEE Multimedia 1, no. 3 (1994): 25. http://dx.doi.org/10.1109/mmul.1994.318980.

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Ulmann, Philippe. "The CODECS Project." HEPAC Health Economics in Prevention and Care 1, no. 2 (2000): 129–30. http://dx.doi.org/10.1007/pl00012212.

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Rajagopal, S., and A. Shenbagavalli. "Design of Real Time Video Encryption System Based on Adaptive Elastic Motion Model in H.264." Journal of Computational and Theoretical Nanoscience 13, no. 10 (2016): 7156–70. http://dx.doi.org/10.1166/jctn.2016.5685.

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For the safeguard of bit streams of H.264 video codec, a new method was offered by this paper. In this document an optimized way of producing motion parameters is suggested. An extremely secure encryption system for H.264 codec can be proposed by encrypting this optimized motion parameter. The video compression is carried out with the help of adaptive PSO (Adaptive Particle Swarm Optimization) algorithm to obtain the best motion parameter in the elastic motion model of H.264 codec. Using ECC (Elliptic Curve Cryptography) algorithm the motion parameters are optimized and which are next encrypte

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Liu, Yanji, and Hee-Jong Suh. "A Comparison of Raptor Code Using LDGM and LDPC code." Journal of the Korea institute of electronic communication sciences 8, no. 1 (2013): 65–70. http://dx.doi.org/10.13067/jkiecs.2013.8.1.065.

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Young, Su Heo, Gun Bang, and Gwang Hoon Park. "A Design for Extension Codec based on Legacy Codec." Journal of Broadcast Engineering 20, no. 4 (2015): 509–20. http://dx.doi.org/10.5909/jbe.2015.20.4.509.

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