round-trip delay time

2000 ◽  
pp. 1504-1504
Author(s):  
Martin H. Weik
Keyword(s):  
Delay Time ◽  
Round Trip ◽  
Round Trip Delay

scholarly journals Hierarchical-P Reference Picture Selection Based Error Resilient Video Coding Framework for High Efficiency Video Coding Transmission Applications

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 310
Author(s):  
Htoo Maung Maung ◽  
Supavadee Aramvith ◽  
Yoshikazu Miyanaga
Keyword(s):  
Video Coding ◽  
Delay Time ◽  
Error Propagation ◽  
High Efficiency ◽  
Packet Error Rate ◽  
Round Trip ◽  
High Efficiency Video Coding ◽  
Error Resilient ◽  
Feedback Information ◽  
Round Trip Delay

In this paper, a new reference picture selection (RPS) is proposed for a high efficiency video coding (HEVC) framework. In recent studies, HEVC has been shown to be sensitive to packet error which is unavoidable in transmission applications especially for wireless networks. RPS is an effective error resilient technique for video transmission systems where a feedback channel with short round trip delay time is available. However, its procedure cannot directly apply to the HEVC framework and thus this paper expands it. In RPS, error propagation can still happen during round trip delay time. To alleviate the effect of error propagation for better quality, the proposed algorithm considers both the RPS technique and the region-based intra mode selection method by using some novel features of HEVC. Experimental results demonstrate that the proposed method outperforms the hierarchical-P RPS algorithm in terms of PSNR and other metrics. The average PSNR improvement of the proposed algorithm over the reference algorithm under 10% packet error rate is 1.56 dB for 1080p sequences, 2.32 dB for 720p sequences and 1.01 dB for wide video graphics array (WVGA) sequences, respectively. The performance of proposed method is also tested for applications where feedback information is not available. The proposed method shows noticeable improvement for video sequences that contain low or moderate level of motions.

At Sensor Diagnosis for Smart Healthcare

2018 ◽  
Vol 10 (4) ◽  
pp. 1-13
Author(s):  
Chetna Laroiya ◽  
Vijay Bhushan Aggarwal
Keyword(s):  
Joint Probability ◽  
Sliding Window ◽  
Communication Technologies ◽  
Data Streaming ◽  
Round Trip ◽  
Time Data ◽  
Smart Healthcare ◽  
Body Sensors ◽  
Round Trip Delay

In order to implement IoT-based health-care for improved quality of life, we have to deal with sensor and communication technologies. In this article, the authors propose an approach to analyse real-time data streaming from a patient's surface body sensors, which are to be looked upon in a small sliding window frame. Time series analysis of data from the sensors is effective in reducing the round-trip delay between patient and the medical server. Two algorithms are for the sensor, and odd measures are proposed based on joint probability and joint conditional probability. The proposed algorithms are to be SQL compliant, as traces of at-sensor UDBMS alongside elementary capabilities supports databases with a meagre amount of SQL, which is evident in the literature.

scholarly journals Performance Evaluation of an IEEE 802.15.4 Wireless Sensor Network on a Coastal Environment

2017 ◽  
Vol 11 (1) ◽  
pp. 98
Author(s):  
Carlos Flores-Cortés ◽  
Raymundo Buenrostro-Mariscal ◽  
Antonio Gurrero-Ibañez ◽  
Fermín Estrada-González ◽  
Jesus Sandoval-Orozco
Keyword(s):  
Ieee 802.15.4 ◽  
Signal Strength ◽  
Ocean Waves ◽  
Coastal Environment ◽  
Wireless Sensor ◽  
Round Trip ◽  
Commercial Activities ◽  
Received Signal Strength Indication ◽  
The Impact ◽  
Round Trip Delay

Wireless Sensor Networks (WSNs) have an enormous potential for investigating oceanographic problems such as the impact of industrial, touristic and commercial activities in coastal areas, among others. However, ocean waves, fog, humidity and other environmental conditions make difficult communication between nodes. This paper presents an evaluation on-site of the performance of an IEEE 802.15.4 WSN. In particular, received signal strength indication, throughput, round trip delay time and the rate of efficiency are evaluated.  Different settings were tested and results shown which settings performed better on these environments.

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