Efficient delivery of on-demand video streams to heterogeneous receivers

Qudah, Bashar; Sarhan, Nabil J.

doi:10.1145/1823746.1823754

Cited by 2 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• ZC : the standard value for the this parameter has also been used for modeling the video popularity skew of video rental scenarios in [34,[42][43][44][45][46]]. …”

Section: Workload and Operating Parameters For The Evaluation Of The mentioning

confidence: 99%

A novel caching algorithm for VoD proxy implementation and its evaluation including a new set of metrics for efficiency analysis

2015

View full text Add to dashboard Cite

Background: Video on demand (VoD) is a fast-growing digital service that requires a substantial amount of hardware resources for its implementation. To reduce the costs of running this service, an alternative is to use proxies that cache the most important portions of the video collection in order to meet the demand for this content in place of the primary server of the VoD system. Methods: To improve the efficiency of the proxies, we proposed a novel caching algorithm that explores the positioning of the active clients to determine the density of clients inside a time window existing in front of each video chunk. The algorithm attributes a higher caching priority to the video chunks with greater aggregate density in the memory. To evaluate our approach, we compared it with others of similar nature using both traditional metrics like hit ratio, as well as physical metrics such as the use of processing resources. This complementary set of metrics is produced by our simulator that, as far as we know, is the first one of its kind to enable the evaluation of hardware consumption used to implement the VoD proxy. Results: Results show that the novel algorithm can achieve a higher hit ratio while requiring a little more effort from the hardware. Additionally, it was identified that the processor constitutes the major bottleneck to this application when demand increases. Conclusions: Among the recent emergence of caching strategies which consider the positioning of clients as criterion for caching, the strategy of prioritizing the chunks with greater density of previous clients showed to be a more efficient solution.

show abstract

“…• ZC : the standard value for the this parameter has also been used for modeling the video popularity skew of video rental scenarios in [34,[42][43][44][45][46]]. …”

Section: Workload and Operating Parameters For The Evaluation Of The mentioning

confidence: 99%

A novel caching algorithm for VoD proxy implementation and its evaluation including a new set of metrics for efficiency analysis

2015

View full text Add to dashboard Cite

show abstract

Evaluation of Information Comprehension in Concurrent Speech-based Designs

Fazal

Ferguson

Johnston

2020

ACM Trans. Multimedia Comput. Commun. Appl.

View full text Add to dashboard Cite

In human-computer interaction, particularly in multimedia delivery, information is communicated to users sequentially, whereas users are capable of receiving information from multiple sources concurrently. This mismatch indicates that a sequential mode of communication does not utilise human perception capabilities as efficiently as possible. This article reports an experiment that investigated various speech-based (audio) concurrent designs and evaluated the comprehension depth of information by comparing comprehension performance across several different formats of questions (main/detailed, implied/stated). The results showed that users, besides answering the main questions, were also successful in answering the implied questions, as well as the questions that required detailed information, and that the pattern of comprehension depth remained similar to that seen to a baseline condition, where only one speech source was presented. However, the participants answered more questions correctly that were drawn from the main information, and performance remained low where the questions were drawn from detailed information. The results are encouraging to explore the concurrent methods further for communicating multiple information streams efficiently in human-computer interaction, including multimedia.

show abstract

Efficient delivery of on-demand video streams to heterogeneous receivers

Cited by 2 publications

References 17 publications

A novel caching algorithm for VoD proxy implementation and its evaluation including a new set of metrics for efficiency analysis

A novel caching algorithm for VoD proxy implementation and its evaluation including a new set of metrics for efficiency analysis

Evaluation of Information Comprehension in Concurrent Speech-based Designs

Contact Info

Product

Resources

About