Adaptive playout strategies for packet video receivers with finite buffer capacity

Laoutaris, Nikolaos; Stavrakakis, Ioannis

doi:10.1109/icc.2001.937381

Cited by 32 publications

(29 citation statements)

References 20 publications

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“…For example, the experiments in [12] assumed a send buffer size of fifty packets. The complexity of an adaptive rather than fixed-size play-out buffer [13], which can subsequently vary its size according to network conditions, may also deter mobile device implementation. Video smoothing was transferred to wireless networks in [14], given that the available bandwidth is even more subject to fluctuations than a fixed network.…”

Section: Related Workmentioning

confidence: 99%

Fuzzy Logic Control of Adaptive ARQ for Video Distribution over a Bluetooth Wireless Link

Razavi

Fleury

Ghanbari

2007

Advances in Multimedia

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Recommended by Tasos DagiuklasBluetooth's default automatic repeat request (ARQ) scheme is not suited to video distribution resulting in missed display and decoded deadlines. Adaptive ARQ with active discard of expired packets from the send buffer is an alternative approach. However, even with the addition of cross-layer adaptation to picture-type packet importance, ARQ is not ideal in conditions of a deteriorating RF channel. The paper presents fuzzy logic control of ARQ, based on send buffer fullness and the head-of-line packet's deadline. The advantage of the fuzzy logic approach, which also scales its output according to picture type importance, is that the impact of delay can be directly introduced to the model, causing retransmissions to be reduced compared to all other schemes. The scheme considers both the delay constraints of the video stream and at the same time avoids send buffer overflow. Tests explore a variety of Bluetooth send buffer sizes and channel conditions. For adverse channel conditions and buffer size, the tests show an improvement of at least 4 dB in video quality compared to nonfuzzy schemes. The scheme can be applied to any codec with I-, P-, and (possibly) B-slices by inspection of packet headers without the need for encoder intervention.

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Section: Related Workmentioning

confidence: 99%

Fuzzy Logic Control of Adaptive ARQ for Video Distribution over a Bluetooth Wireless Link

Razavi

Fleury

Ghanbari

2007

Advances in Multimedia

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“…To study the buffer size required for removing the jitter in networks, Yuang et al [1996Yuang et al [ , 1997, Steinbach et al [2001], Kalman et al [2004], and Laoutaris and Stavrakakis [2001] present Markov chain models based on Poisson arrivals. However, in wireless networks, the arrival of streaming traffic cannot be simply modeled as a Poisson distribution because the capacity changes due to wireless rate adaptation algorithms produces variance in the streaming traffic arrival rate.…”

Section: Playout Buffer Optimizationmentioning

confidence: 99%

“…There are a variety of strategies proposed to improve the effectiveness of client-side buffering that include optimizing the buffer size based on jitter removal [Mundur et al 1999;Ramjee et al 1994; Moon et al 1998;Fujimoto et al 2002], slowing down the media playout rate at the client to reduce the consumption rate and help prevent buffer underflow [Yuang et al 1996;Steinbach et al 2001;Laoutaris and Stavrakakis 2001;Kalman et al 2004], and mitigating the buffer size required by VBR media codecs [Yuang et al 1997;Feng and Sechrest 1995]. Since VBR streaming smoothers usually have a static size based on the media codec, and the adaptive playout rate can be used as an additive for reducing the buffer underflow events in most streaming systems, most buffer optimization algorithms are primarily for jitter removal.…”

Section: Playout Buffer Optimizationmentioning

confidence: 99%

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Playout buffer and rate optimization for streaming over IEEE 802.11 wireless networks

Claypool

Kinicki

2009

ACM Trans. Multimedia Comput. Commun. Appl.

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Most streaming rate selection and buffer optimization algorithms are developed for wired networks and can perform poorly over wireless networks. Wireless MAC layer behavior, such as rate adaptation, retransmissions, and medium sharing, can significantly degrade the effectiveness of current streaming algorithms. This article presents the Buffer and Rate Optimization for Streaming (BROS) algorithm to improve streaming performance. BROS uses a bandwidth estimation tool designed specifically for wireless networks and models the relationship between buffer size, streaming data rate, and available bandwidth distribution. BROS optimizes the streaming data rate and initial buffer size, resulting in a high data rate but with few frame losses and buffer underflow events, while still keeping a small initial buffer delay. BROS is implemented in the Emulated Streaming (EmuS) client-server system and evaluated on an IEEE 802.11 wireless testbed with various wireless conditions. The evaluation shows that BROS can effectively optimize the streaming rate and initial buffer size based on wireless network bandwidth conditions, thus achieving better performance than static rate or buffer selection and jitter removal buffers.

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“…Entre los primeros podemos destacar [ALV93], [RAM93b], [KÖL94], [RAM94], [ROT95], [ISH95], [SHI95], [STO95], [BIE96], [GEY96], [KOU96], [LIU96], [ISH97], [ISH99], [ROT97], [MOO98], [XIE99], [BAL00], [GON00], [ISH01a], [KUO01], [LAO01a], [LAO01b], [ROC01], [JEO02] y [LAO02].…”

Section: Soluciones Particulares Al Problema De La Sincronización De mentioning

confidence: 99%

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

Boronat¹

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In this thesis an algorithm for Multimedia Group Synchronisation is proposed. It is based on feedback techniques and a global time reference.The algorithm solves the multimedia group synchronization problem in non critical multimedia applications, such as remote learning and telesurveillance. It includes not only inter-stream synchronization but it also guarantees the interreceiver synchronization, playing all the streams at the same time at all receivers.To cite an example, we can consider the remote learning application in which a teacher can send a film to his students and talk about it so they can work interconnected or answer him.The proposed algorithm is based on RTP/RTCP utilization, defining new RTCP data structures or even modifying the existing ones. So the devices in a multimedia application can interchange control information useful for the algorithm. It also considers a global time provided by NTP.The author presents several results from an objective and subjective evaluation. They show that the algorithm works well over point-multipoint and multipoint-multipoint communications, whit several sources and several receivers. ResumenEn la presente Tesis se presenta un algoritmo de sincronización de grupo de flujos multimedia, basado en técnicas de realimentación y la utilización de una referencia de tiempo global común a todos los sistemas involucrados en una aplicación multimedia.Dicho algoritmo trata de solucionar el problema de la sincronización de grupo de flujos en aplicaciones multimedia no críticas como, por ejemplo, las de aprendizaje a distancia o televigilancia. No sólo se ocupa de la sincronización local entre flujos en un mismo receptor, sino que garantiza también la reproducción simultánea (sincronizada), de todos los flujos en todos los receptores al mismo tiempo. Como ejemplo podríamos citar una aplicación de aprendizaje a distancia, en la que, por ejemplo, el profesor o tutor envíe un vídeo de una película (flujo de contenido almacenado) y, al mismo tiempo, en determinados instantes, pueda hacer comentarios (flujo de contenido en directo) sobre las imágenes que se están viendo de la película y los estudiantes discutir dichos comentarios o incluso contestar al profesor.El algoritmo propuesto se basa en la utilización de los protocolos RTP y RTCP, definiendo nuevas estructuras de datos de éste último y modificando algunas ya existentes, para que los equipos que se comunican puedan intercambiar información esencial para dicho algoritmo. También hace uso del protocolo NTP como referencia de tiempo global.Se presentan los resultados de una evaluación del mismo, tanto objetiva como subjetivamente, mostrando un comportamiento satisfactorio sobre configuraciones punto-multipunto y multipunto-multipunto, con varias fuentes y varios receptores de flujos multimedia. ResumAmb aquesta Tesi es presenta un algoritme de sincronització de fluxos d'informació de diferent naturalesa (multimedia), basat en tècniques de realimentació i en la utilització d'una referència de temps global comú a tots el...

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Adaptive playout strategies for packet video receivers with finite buffer capacity

Cited by 32 publications

References 20 publications

Fuzzy Logic Control of Adaptive ARQ for Video Distribution over a Bluetooth Wireless Link

Fuzzy Logic Control of Adaptive ARQ for Video Distribution over a Bluetooth Wireless Link

Playout buffer and rate optimization for streaming over IEEE 802.11 wireless networks

Especificación y evaluación de un algoritmo de sincronización de grupo de flujos multimedia

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