scholarly journals Context-Adaptive Arithmetic Coding Scheme for Lossless Bit Rate Reduction of MPEG Surround in USAC

2012 ◽  
Vol E95.D (7) ◽  
pp. 2013-2016 ◽  
Author(s):  
Sungyong YOON ◽  
Hee-Suk PANG ◽  
Koeng-Mo SUNG
Keyword(s):  
Arithmetic Coding ◽  
Bit Rate ◽  
Rate Reduction ◽  
Coding Scheme ◽  
Adaptive Arithmetic Coding

A Research of Intra Prediction Coding with Variance of Prediction Mode Number

2015 ◽  
Vol 719-720 ◽  
pp. 1177-1183
Author(s):  
Wei Zheng ◽  
Long Ye ◽  
Jing Ling Wang ◽  
Qin Zhang
Keyword(s):  
State Of The Art ◽  
Intra Prediction ◽  
Mode Number ◽  
Bit Rate ◽  
Rate Reduction ◽  
Directional Information ◽  
Mode Index ◽  
Residual Image ◽  
Prediction Mode ◽  
Direction Information

Intra prediction is a key step in H.264/AVC to improve the coding performance with the idea that removing the directional redundancy among neighboring blocks. In order to cover more directional information existed in the image frames, there are usually many prediction modes can be selected in the state-of-the-art coding frameworks, but more bits are also needed to encode the prediction mode index information, then how to achieve the maximum overall bit-rate reduction became a problem. In this paper, 16 kinds of prediction modes are adopted by considering the direction information for 8x8 image blocks. Through calculating the bit-rate both for the mode index and residual image under different number of prediction modes, we obtain the most suitable prediction mode number relatively from the graphs. Experimental results show that, with the increase of prediction mode number, the residual information decreases obviously, and the sum of residual information and prediction mode index information also decreases but levels off after reaching a certain mode number, even has an obviously rising trend.

scholarly journals DESIGN AND ANALYSIS OF DIFFERENT TECHNIQUES FOR ANALOG-TO-DIGITAL CONVERSION OF VIBRATION SIGNALS FOR WIRELESS MEASUREMENT SYSTEMS

2018 ◽  
Vol 17 (1) ◽  
pp. 39
Author(s):  
Milan Dinčić ◽  
Dragan Denić ◽  
Zoran Perić
Keyword(s):  
Digital Data ◽  
Bit Rate ◽  
Rate Reduction ◽  
Digital Conversion ◽  
Vibration Signals ◽  
Analog To Digital ◽  
Measurement Systems ◽  
Analog To Digital Conversion ◽  
Uniform Quantization ◽  
Wireless Measurement

The aim of this paper is to design, analyze and compare four different systems for ADC (analog-to-digital conversion) of vibration signals. Measurement of vibration signals is of particular importance in many areas, such as predictive maintenance or structural health monitoring. Wireless systems for vibration measurements becomes very topical, due to much easier and cheaper installation compared to wired systems. Due to the lack of transmission bandwidth and energy in wireless measurement systems, the amount of digital data being sent has to be reduced; hence, we have to apply ADC systems that can achieve the required digital signal quality, reducing the bit-rate. Four ADC systems are analyzed, for possible application in wireless measurement systems: PCM (pulse code modulation) based on uniform quantization; DPCM (differential PCM) to exploit high correlation of vibration signals; two adaptive ADC systems to cope with significant variations of characteristics of vibration signals in time - APCM (adaptive PCM) with adaptation on variance and ADPCM (adaptive DPCM), with double adaptation (both on variance and correlation). These ADC models are designed and optimized specifically for vibration signals, based on the analysis of 20 vibration signals from a referent database. An experiment is done, applying designed ADC systems for digitalization of vibration signals. APCM, DPCM and ADPCM systems allow significant bit-rate reduction compared to the PCM system, but with the increasing of complexity, hence the compromise between the bit-rate reduction and complexity is needed.

Level Reassignment: A Technique for Bit-Rate Reduction

1978 ◽  
Vol 57 (1) ◽  
pp. 61-73
Author(s):  
B. Prasada ◽  
F. W. Mounts ◽  
A. N. Netravali
Keyword(s):  
Bit Rate ◽  
Rate Reduction

Segmentation of Source Symbols for Adaptive Arithmetic Coding

2012 ◽  
Vol 58 (2) ◽  
pp. 228-235 ◽  
Author(s):  
Liang Zhang ◽  
Demin Wang ◽  
Dong Zheng
Keyword(s):  
Arithmetic Coding ◽  
Adaptive Arithmetic Coding

An efficient adaptive arithmetic coding image compression technology

2011 ◽  
Vol 20 (10) ◽  
pp. 104203 ◽  
Author(s):  
Xing-Yuan Wang ◽  
Jiao-Jiao Yun ◽  
Yong-Lei Zhang
Keyword(s):  
Image Compression ◽  
Arithmetic Coding ◽  
Adaptive Arithmetic Coding
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