Results 21 to 30 of about 1,421 (152)
Advances in Electrical and Computer Engineering, 2010 In this article DPCM (Differential Pulse Code Modulation) speech coding scheme with a simple switched first order predictor is presented. Adaptation of the quantizer to the signal variance is performed for each particular frame. Each frame is classified
VELIMIROVIC, L. +3 more
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GPU-Based Lossless Compression of Aurora Spectral Data using Online DPCM
Remote Sensing, 2019 It is well known that aurorae have very high research value, but the data volume of aurora spectral data is very large, which brings great challenges to storage and transmission.
Jiaojiao Li, Jiaji Wu, Gwanggil Jeon
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ADPCM Using a Second-order Switched Predictor and Adaptive Quantizer
Advances in Electrical and Computer Engineering, 2011 Adaptive differential pulse code modulation (ADPCM) with forward gain-adaptive quantizer and second-order switched predictor based on correlation is presented in this article.
DESPOTOVIC, V., PERIC, Z.
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A New Frame Memory Compression Algorithm with DPCM and VLC in a 4×4 Block
EURASIP Journal on Advances in Signal Processing, 2009 Frame memory compression (FMC) is a technique to reduce memory bandwidth by compressing the video data to be stored in the frame memory. This paper proposes a new FMC algorithm integrated into an H.264 encoder that compresses a 4×4 block by ...
Yongje Lee, Yongseok Jin, Hyuk-Jae Lee
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PSNR Improvement using Different Prediction Coding in Image Compression
Tikrit Journal of Engineering Sciences, 2010 Differential Pulse Code Modulation (DPCM) is one of the predictive coding techniques. The number of previous pixels employed in the estimate operation is referred to as the order of the predictor. Predictor using one pixel for estimation is called “first
Khamies K. Hasan
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Adaptive Image Compressive Sensing Using Texture Contrast
International Journal of Digital Multimedia Broadcasting, Volume 2017, Issue 1, 2017., 2017 The traditional image Compressive Sensing (CS) conducts block‐wise sampling with the same sampling rate. However, some blocking artifacts often occur due to the varying block sparsity, leading to a low rate‐distortion performance. To suppress these blocking artifacts, we propose to adaptively sample each block according to texture features in this ...
Fang Sun +4 more
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Rate‐Distortion and Rate‐Energy‐Distortion Evaluations of Compressive‐Sensing Video Coding
International Journal of Digital Multimedia Broadcasting, Volume 2017, Issue 1, 2017., 2017 Compressive‐Sensing Video Coding (CSVC) is a new video coding framework based on compressive‐sensing (CS) theory. This paper presents the evaluations on rate‐distortion performance and rate‐energy‐distortion performance of CSVC by comparing it with the popular hybrid video coding standard H.264 and distributed video coding (DVC) system DISCOVER ...
Bingyu Ji +3 more
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Further investigation on adaptive search
The Journal of Engineering, Volume 2014, Issue 5, Page 238-247, May 2014., 2014 Adaptive search is one of the fastest fractal compression algorithms and has gained great success in many industrial applications. By substituting the luminance offset by the range block mean, the authors create a completely new version for both the encoding and decoding algorithms.
Ming Hong Pi +3 more
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Realization of DVCCTA Based Versatile Modulator
Active and Passive Electronic Components, Volume 2014, Issue 1, 2014., 2014 A Differential Voltage Current Conveyor Transconductance Amplifier (DVCCTA) based versatile modulator is proposed which can work as an amplitude modulator, frequency modulator, delta modulator, and sigma delta modulator. The modulator operational scheme uses pulse generator as a core and its output is used as carrier signal.
Neeta Pandey +4 more
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Edge-Based and Prediction-Based Transformations for Lossless Image Compression
Journal of Imaging, 2018 Pixelated images are used to transmit data between computing devices that have cameras and screens. Significant compression of pixelated images has been achieved by an “edge-based transformation and entropy coding” (ETEC) algorithm recently ...
Md. Ahasan Kabir +1 more
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