scholarly journals Low complexity code design for lossless and near-lossless side information source codes

2003 ◽  
Author(s):  
Qian Zhao ◽  
M. Effros
Keyword(s):  
Side Information ◽  
Information Source ◽  
Low Complexity ◽  
Code Design ◽  
Source Codes

Advanced Information Hiding for G.711 Telephone Speech

2013 ◽  
pp. 129-163 ◽  
Author(s):  
Akinori Ito ◽  
Yôiti Suzuki
Keyword(s):  
Data Hiding ◽  
Side Information ◽  
Low Complexity ◽  
Speech Quality ◽  
Rate Data ◽  
Bit Rate ◽  
Bandwidth Extension ◽  
Low Bit Rate ◽  
Speech Codec ◽  
Popular Speech

G.711 is the most popular speech codec for Voice over IP (VoIP). This chapter proposes a method for embedding data into G.711-coded speech for conveying side information for enhancing speech quality such as bandwidth extension or packet loss concealment. The proposed method refers to a low-bit rate encoder to determine how many bits are embedded into each sample. First, a variable-bit rate data hiding method is proposed as a basic framework of the proposed method. Then, the proposed method is extended to achieve fixed bit rate data hiding. According to comparison experiments, the proposed method is proved to achieve higher speech quality compared with the conventional method. Moreover, the authors developed a low-complexity speech bandwidth extension method that uses the proposed data hiding method.

scholarly journals Fountain code design for data multicast with side information

2009 ◽  
Vol 8 (10) ◽  
pp. 5155-5165 ◽  
Author(s):  
D. Sejdinovic ◽  
R. Piechocki ◽  
A. Doufexi ◽  
M. Ismail
Keyword(s):  
Side Information ◽  
Code Design ◽  
Fountain Code

Residual-Quantization Based Code Design for Compressing Noisy Sources With Arbitrary Decoder Side Information

2016 ◽  
Vol 64 (4) ◽  
pp. 1711-1725 ◽  
Author(s):  
Yi-Peng Wei ◽  
Shih-Chun Lin ◽  
Song-Jheng Lin ◽  
Hsuan-Jung Su ◽  
H. Vincent Poor
Keyword(s):  
Side Information ◽  
Code Design

scholarly journals Edge Dissimilarity Reduced-Reference Quality Metric with Low Overhead Bitrate

2018 ◽  
Vol 10 (2) ◽  
pp. 631
Author(s):  
Farah Diyana Abdul Rahman ◽  
Dimitris Agrafiotis ◽  
Ahmad Imran Ibrahim
Keyword(s):  
Side Information ◽  
Video Quality ◽  
Low Complexity ◽  
Edge Information ◽  
Quality Metric ◽  
Objective Quality ◽  
Reference Quality ◽  
Edge Based ◽  
Video Quality Metric

In multimedia transmission, it is important to rely on an objective quality metric which accurately represents the subjective quality of processed images and video sequences. Reduced-reference metrics make use of side-information that is transmitted to the receiver for estimating the quality of the received sequence with low complexity. In this paper, an Edge-based Dissimilarity Reduced-Reference video quality metric with low overhead bitrate is proposed. The metric is evaluated by finding the dissimilarity between the edge information of original and distorted sequences. The edge degradation can be detected in this manner as perceived video quality is highly associated with edge structural. Due to the high overhead using the Soergel distance, it is pertinent to find a way to reduce the overhead while maintaining the edge information that can convey the quality measure of the sequences. The effects of different edge detection operator, video resolution and file compressor are investigated. The aim of this paper is to significantly reduce the bitrate required in order to transmit the side information overhead as the reduced reference video quality metric. From the results obtained, the side information extracted using Sobel edge detector maintained consistency throughout the reduction of spatial and temporal down-sample.

DESIGN AND IMPLEMENTATION OF WIRELESS SENSOR NETWORK FOR ROBOT NAVIGATION

2007 ◽  
Vol 04 (01) ◽  
pp. 77-89 ◽  
Author(s):  
WANMING CHEN ◽  
HUAWEI LIANG ◽  
TAO MEI ◽  
ZHUHONG YOU ◽  
SHIFU MIAO ◽  
...  
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Robot Navigation ◽  
Information Source ◽  
Low Complexity ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Localization Algorithm ◽  
Distributed Information ◽  
Communication Method

Global Positioning System (GPS) is often used as a main information source for robot localization and navigation. However, it cannot be used in room or in field complex environment because of the bad signal there. To solve this problem, the authors designed and implemented a specific wireless sensor network (WSN) to provide information about the environment and indicate path for robot navigation. A two-stage auto-adaptive route selecting mechanism of the WSN was proposed to facilitate data relaying in localization and the robot's navigation. A low complexity localization algorithm was used to localize both the nodes and the robot. An indirect communication method was designed to make the communication between the WSN and the robot possible. In addition, a robot navigation method was proposed based on the wireless sensor network. In this method, the robot did not need to obtain the environment information; the wireless sensor nodes collected and fused the distributed information and then indicate a path for the robot. Experiments showed that the wireless sensor network can result in obstacle avoidance navigation, and can implement the online navigation.

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