Relevant bibliographies by topics / G.729D

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  2. Dissertations / Theses
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  4. Conference papers

Academic literature on the topic 'G.729D'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "G.729D"

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CHEN, F. K., and Y. R. TSAI. "Switching Search Method for Pulse Assignment in ITU-T G.729D." IEICE Transactions on Information and Systems E91-D, no. 10 (2008): 2532–35. http://dx.doi.org/10.1093/ietisy/e91-d.10.2532.

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Cox, R. V., and M. Hashem. "Standardization and Characterization of G.729." IEEE Communications Magazine 35, no. 9 (1997): 38. http://dx.doi.org/10.1109/mcom.1997.620523.

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Hwang, Shaw-Hwa. "Computational improvement for G.729 standard." Electronics Letters 36, no. 13 (2000): 1163. http://dx.doi.org/10.1049/el:20000773.

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Shen, Yan Chun. "VoIP Data Transmission System Based on G.729A." Applied Mechanics and Materials 443 (October 2013): 354–58. http://dx.doi.org/10.4028/www.scientific.net/amm.443.354.

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It uses Windows low-level audio API to record and broadcast voice packets, encodes and decodes through G.729A, and groups by TCP/IP protocol, transmits data packets by UDP on the SOCK_DGRAM SOCKET between the client and the server, So as to achieve the function of Internet voice communication. To ensure user friendly interface, the premise here using multi-threaded programming. In addition, the system also in application-layer protocol adds the text chat function which based on TCP transmission. The essence of the design is to realize software to communicate by voice or text which based Windows operating system. The successful debugging of this software will have a positive effect on the PC to PC kind of VoIP communications system.
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Fufang, Li, Li Binbin, Liu Liangchen, Feng Yuanyong, and Peng Lingxi. "A Steganography Method for G.729a Speech Coding." International Journal of Performability Engineering 16, no. 5 (2020): 784. http://dx.doi.org/10.23940/ijpe.20.05.p12.784791.

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Yan, Shufan, Guangming Tang, and Yanling Chen. "Incorporating data hiding into G.729 speech codec." Multimedia Tools and Applications 75, no. 18 (2015): 11493–512. http://dx.doi.org/10.1007/s11042-015-2865-1.

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Lee, Min-Ki, and Hong-Goo Kang. "Non-Intrusive Speech Quality Estimation of G.729 Codec using a Packet Loss Effect Model." Journal of the Acoustical Society of Korea 32, no. 2 (2013): 157–66. http://dx.doi.org/10.7776/ask.2013.32.2.157.

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Kurihara, Sachiko, Akitoshi Kataoka, Shinji Hayashi, and Takao Kaneko. "Quality assessment for extending ITU-T G.729 Annexes." Systems and Computers in Japan 36, no. 5 (2005): 33–44. http://dx.doi.org/10.1002/scj.20208.

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Zilic, Sladjana, Marija Milivojevic, Sladjana Sobajic, and Milan Maksimovic. "Effect of multiple alleles on oxidative stability and germination of soybean seeds subsequent to the accelerated ageing test." Genetika 38, no. 1 (2006): 37–48. http://dx.doi.org/10.2298/gensr0601037z.

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The purpose of this study was to determine changes of lipoxygenase activities, contents of antioxidants (tocopherol ?, ?-carotene and chlorophyll) fatty acids and soluble proteins, as well as, vigor in accelerated aged soybean seeds. The following soybean cultivars were used in the study: Williams 82, Goyou Kurakake and L93-7290. Subsequent to the accelerated ageing test (AAT), 23% of seeds of the cultivar Goyou Kurakake retained normal germination, while grain of the two remaining cultivars L93-7290 and Williams 82, completely lost germination ability. According to our results, the seeds of the cultivar Goyou Kurakake (the absence of lipoxygenases 2) is characterized by a significantly higher content of all observed antioxidants (tocopherol ? 2.7 mg 100g-1, ?-carotene 6.1 ?g g-1 chlorophyll 4.9 ?g g-1). The contents of (?-carotene and chlorophyll decreased after AAT in the seed of the cultivar Goyou Kurakake by 42.8% and 60.5%, respectively, while the content of tocopherol a remained the same. Furthermore, the tocopherol a content was not changed after AAT neither in the cultivar L93-7290 nor in the cultivar Williams 82. The content of ?-carotene after AAT remained the same in seeds of the cultivar Williams 82 while it decreased by 7.7% in the cultivar L93-7290. Since changes of the fatty acids content were not pronounced in the cultivar Goyou Kurakake after AAT it can be concluded that the antioxidative system had a crucial role in seeds protection against lipid peroxidation.
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Núñez Cuadrado, Marcelo David, Carlos Andres Jativa Huilcapi, and Román Alcides Lara Cueva. "Performance evaluation of VoIP technology in an extended service set, in concordance with IEEE 802.11g." Sistemas y Telemática 15, no. 42 (2017): 85–100. http://dx.doi.org/10.18046/syt.v15i42.2541.

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In this paper, we evaluate the performance in function of the metrics associated to Quality of Service [QoS] and Quality of user Experience [QoE] in an experimental way in the VoIP service for G.711 and G.729 códecs. This was performed over an extended service set based on Wi-Fi technology in concordance with IEEE 802.11g standard using embedded systems. QoS related metrics are obtained by using the intrusive traffic injection technique. In addition, we assessed the QoE using the MOSc [Mean Opinion Score conversational] analysis. The best results were obtained for G.729, reaching up to 25 simultaneous injections with optimal delay, jitter and packet loss values according to the ITU-T recommendation for VoIP. However, the G.711 codec presented a better throughput. On the other hand, QoE evaluation indicates a slight superiority of G.729 in the MOSc appreciation. Finally, we conclude that packet loss and delay are the most influential metrics in VoIP service degradation.
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Dissertations / Theses on the topic "G.729D"

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Thorell, Hampus. "Voice Activity Detection in the Tiger Platform." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6586.

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<p>Sectra Communications AB has developed a terminal for encrypted communication called the Tiger platform. During voice communication delays have sometimes been experienced resulting in conversational complications.</p><p>A solution to this problem, as was proposed by Sectra, would be to introduce voice activity detection, which means a separation of speech parts and non-speech parts of the input signal, to the Tiger platform. By only transferring the speech parts to the receiver, the bandwidth needed should be dramatically decreased. A lower bandwidth needed implies that the delays slowly should disappear. The problem is then to come up with a method that manages to distinguish the speech parts from the input signal. Fortunately a lot of theory on the subject has been done and numerous voice activity methods exist today.</p><p>In this thesis the theory of voice activity detection has been studied. A review of voice activity detectors that exist on the market today followed by an evaluation of some of these was performed in order to select a suitable candidate for the Tiger platform. This evaluation would later become the foundation for the selection of a voice activity detector for implementation.</p><p>Finally, the implementation of the chosen voice activity detector, including a comfort noise generator, was done on the platform. This implementation was based on the special requirements of the platform. Tests of the implementation in office environments show that possible delays are steadily being reduced during periods of speech inactivity, while the active speech quality is preserved.</p>
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Carbonneau, Patrice. "Transmission vocale via Internet utilisant les codeurs G.729 et G.729a." Mémoire, Sherbrooke : Université de Sherbrooke, 2002. http://savoirs.usherbrooke.ca/handle/11143/1183.

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Leite, Cavalcante Dirceu. "Uma análise comparativa dos codificadores/ decodificadores de voz para comunicações digitais." Universidade Federal de Pernambuco, 2009. https://repositorio.ufpe.br/handle/123456789/5370.

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Made available in DSpace on 2014-06-12T17:38:38Z (GMT). No. of bitstreams: 2 arquivo6843_1.pdf: 6495590 bytes, checksum: 70920d84d99aaea507f54372f16579da (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2009<br>O presente trabalho apresenta uma análise comparativa dos codificadores utilizados em comunicações digitais, notadamente em chamadas VoIP, para fonemas da Língua Portuguesa. O foco deste trabalho é a análise da capacidade do processamento se adaptar às variações do trato vocal durante a pronúncia de intervalos contendo fonemas em frases, simulando uma resposta em tempo real durante uma conversação. Para tal, foram extraídas as freqüências fundamental e das três primeiras formantes para cada um dos intervalos para um grupo de homens e mulheres de várias faixas etárias. A criação de tais intervalos e extração das freqüências foram efetuadas através do programa Praat, com a utilização de análise perceptual e espectrogramas. Resultados mostram uma sutil diferença no processamento da freqüência das formantes entre homens e mulheres. Observou-se também um fenômeno de correção da freqüência fundamental em intervalos contendo variantes consonantais tanto para ambos os sexos. Foram analisados os codificadores de voz G.722, G.723.1, G.726, G.728, G.729A, iLBC e Speex
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Trilling, Romain. "Codage large bande de la parole par encapsulation du codeur ITU G.729 (CS-ACELP)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0002/MQ40628.pdf.

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Khadra, Ali. "Amélioration de la robustesse de décodeurs de parole basés sur le modèle CELP en utilisant les informations retardées : application au standard G.729 pour la voix sur IP = Improving the robustness of CELP-like speech decoders using late-arrival packets information : application to G.729 standard in VoIP." Sherbrooke : Université de Sherbrooke, 2004.

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Khadra, Ali. "Amélioration de la robustesse de décodeurs de parole basés sur le modèle CELP en utilisant les informations retardées application au standard G.729 pour la voix sur IP." Mémoire, Université de Sherbrooke, 2003. http://savoirs.usherbrooke.ca/handle/11143/1229.

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Voice over Internet applications is the new trend in telecommunications and networking industry today. Packetizing data/voice is done using the Internet protocol (IP). Various codecs exist to convert the raw voice data into packets. The coded and packetized speech is transmitted over the Internet. At the receiving end some packets are either lost, damaged or arrive late. This is due to constraints such as network delay (fitter), network congestion and network errors. These constraints degrade the quality of speech. Since voice transmission is in real-time, the receiver can not request the retransmission of lost or damaged packets as this will cause more delay. Instead, concealment methods are applied either at the transmitter side (coder-based) or at the receiver side (decoder-based) to replace these lost or late-arrival packets. This work attempts to implement a novel method for improving the recovery time of concealed speech The method has already been integrated in a wideband speech coder (AMR-WB) and significantly improved the quality of speech in the presence of jitter in the arrival time of speech frames at the decoder. In this work, the same method will be integrated in a narrowband speech coder (ITU-T G.729) that is widely used in VoIP applications. The ITUT G.729 coder defines the standards for coding and decoding speech at 8 kb/s using Conjugate Structure Algebraic Code-Excited Linear Prediction (CS-CELP) Algorithm.
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Kovařík, Jiří. "Detektor řečové aktivity v signálovém procesoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219784.

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In this diploma thesis were created voice activity detectors according to the standard ITU-T G.729 and G.723.1. The voice activity detectors were implements in the digital signal processor TMS320C6416 made by Texas Instruments. At the same time detectors were designed using by MATLAB programming language. The diploma thesis can be divided into two parts. In the theoretical section provides information on how to report detectors in the standard ITU-T G.729 and G.723.1. In the implementation part is described steps in the implementation of the detector in signal processor TMS320C6416 and there are discussed various differences compared to the documentation.
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Adamec, Michal. "Moderní rozpoznávače řečové aktivity." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217322.

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This masters theses deals with standard detection methods of speech/pause - voice activity detectors are based on the principles of short-time energy, real spectrum, short-time intensity and on a combinations of these three detectors. In the next parts, there are mentioned other voice activity detectors based on hidden Markovov‘s models and a detector described in the ITU-T G.729 standard. All the detectors, mentioned above, were implemented in research environment MATLAB. Further there was created an user interface for testing functions of the implemented detectors. Finally, there was done an evaluation by ROC characteristics according to the results of the testing.
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Lúdik, Michal. "Porovnání hlasových a audio kodeků." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219793.

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This thesis deals with description of human hearing, audio and speech codecs, description of objective measure of quality and practical comparison of codecs. Chapter about audio codecs consists of description of lossless codec FLAC and lossy codecs MP3 and Ogg Vorbis. In chapter about speech codecs is description of linear predictive coding and G.729 and OPUS codecs. Evaluation of quality consists of description of segmental signal-to- noise ratio and perceptual evaluation of quality – WSS and PESQ. Last chapter deals with description od practical part of this thesis, that is comparison of memory and time consumption of audio codecs and perceptual evaluation of speech codecs quality.
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陳建吉. "Computational Improvement for G.729 Standard." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/79305205596461365434.

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碩士<br>國立臺北科技大學<br>電機工程系碩士班<br>91<br>The computational improvement on G.729 standard is studied in this thesis. Three algorithms are employed and proposed to enhance the computational performance of G.729. Firstly, the “TIE+PDE” algorithm is employed to reduce the VQ-based quantization of LSP parameter. More than 13.97% of computation is reduced. Secondly, the “WD-LSP” algorithm is proposed to reduce the computation of open-loop pitch. More than 23.69% of computation is reduced. Finally, the “NCPL” algorithm is proposed to reduce the search space of fixed codebook. More than 18.38% of computation is reduced. Finally, three algorithms are simultaneously applied, which result in a total reduction of 56.04% in computation, with a reasonable good quality of synthesized speech sound.
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Book chapters on the topic "G.729D"

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Kazemitabar, Haniyeh, and Abas Md. Said. "Capacity Analysis of G.711 and G.729 Codec for VoIP over 802.11b WLANs." In Informatics Engineering and Information Science. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25462-8_47.

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Yochanang, Kiattisak, Therdpong Daengsi, Tuul Triyason, and Pongpisit Wuttidittachotti. "A Comparative Study of VoIP Quality Measurement from G.711 and G.729 Using PESQ and Thai Speech." In Advances in Information Technology. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-03783-7_22.

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Raval, Kalpesh, Ravi P. Ramachandran, Sachin S. Shetty, and Brett Y. Smolenski. "Feature and Signal Enhancement for Robust Speaker Identification of G.729 Decoded Speech." In Neural Information Processing. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-34500-5_41.

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Wu, Zhijun. "The G.729-Based Speech Information Hiding Approach." In Information Hiding in Speech Signals for Secure Communication. Elsevier, 2015. http://dx.doi.org/10.1016/b978-0-12-801328-1.00006-9.

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"Real-Time DSP Implementation of ITU-T G.729/A Speech Coder." In Principles of Speech Coding. CRC Press, 2010. http://dx.doi.org/10.1201/b15821-17.

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Conference papers on the topic "G.729D"

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Shevchuk, Ruslan. "Method of Converting Speech Codec Formats between G.723.1 and G.729A." In 2007 9th International Conference - The Experience of Designing and Applications of CAD Systems in Microelectronics. IEEE, 2007. http://dx.doi.org/10.1109/cadsm.2007.4297625.

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Tan, Xiaoqiong, Ruimin Hu, Weiping Tu, and Haojun Ai. "Implementation of G.729A on Embedded SIMD Processor." In 2011 Fourth International Symposium on Parallel Architectures, Algorithms and Programming (PAAP). IEEE, 2011. http://dx.doi.org/10.1109/paap.2011.29.

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Su, Ya-min, Yong-feng Huang, and Xing Li. "Steganography-Oriented Noisy Resistance Model of G.729a." In Multiconference on "Computational Engineering in Systems Applications. IEEE, 2006. http://dx.doi.org/10.1109/cesa.2006.4281615.

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Amro, Islam. "Higher Compression Rates for ITU-T G.729." In 2013 8th EUROSIM Congress on Modelling and Simulation (EUROSIM). IEEE, 2013. http://dx.doi.org/10.1109/eurosim.2013.76.

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Liu, Lihua, Mingyu Li, Qiong Li, and Yan Liang. "Perceptually Transparent Information Hiding in G.729 Bitstream." In 2008 Fourth International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP). IEEE, 2008. http://dx.doi.org/10.1109/iih-msp.2008.297.

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Zhang, Zhengwen, Geng Wang, and Yongjie Zhang. "Implementation of G.729 algorithm based on ARM9." In 2012 2nd International Conference on Consumer Electronics, Communications and Networks (CECNet). IEEE, 2012. http://dx.doi.org/10.1109/cecnet.2012.6201699.

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Servetti, Antonio, and Juan Carlos De Martin. "Perception-based selective encryption of G.729 speech." In Proceedings of ICASSP '02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.5743794.

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Servetti and De Martin. "Perception-based selective encryption of G.729 speech." In IEEE International Conference on Acoustics Speech and Signal Processing ICASSP-02. IEEE, 2002. http://dx.doi.org/10.1109/icassp.2002.1005816.

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Jiao, Yuhua, Yubo Tian, Qiong Li, and Xiamu Niu. "Content Integrity Verification for G.729 Coded Speech." In Third International Conference on Intelligent Information Hiding and Multimedia Signal Processing. IEEE, 2007. http://dx.doi.org/10.1109/iihmsp.2007.4457709.

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Labyad, Younes, Mohamed Moughit, Abderrahim Marzouk, and Abdelkrim Haqiq. "Comparative of developed VoLTE AC algorithm with existing one using G.711, G.723 and G.729." In 2015 Third World Conference on Complex Systems (WCCS). IEEE, 2015. http://dx.doi.org/10.1109/icocs.2015.7483216.

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