Results 21 to 30 of about 1,429 (153)
Sparse representation based intraframe and semi‐intraframe video coding schemes for low bitrates
IET Image Processing, Volume 15, Issue 5, Page 1128-1143, April 2021., 2021 Abstract This paper proposes some extensions of the successful sparse coding of still images to intraframe and semi‐intraframe video coding. The presented frameworks apply the efficient K‐singular value decomposition and recursive least squares dictionary learning methods for sparse representation of videos to study their coding performances.
Maziar Irannejad +1 more
wiley +1 more source
JPEG Lifting Algorithm Based on Adaptive Block Compressed Sensing
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 This paper proposes a JPEG lifting algorithm based on adaptive block compressed sensing (ABCS), which solves the fusion between the ABCS algorithm for 1‐dimension vector data processing and the JPEG compression algorithm for 2‐dimension image data processing and improves the compression rate of the same quality image in comparison with the existing ...
Yongjun Zhu +5 more
wiley +1 more source
The Methods toward Improving Communication Performance in Transparent Radio Frequency Signals
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 In wireless digital communications, amplitude‐shift keying (ASK) and frequency‐shift keying (FSK) modules are often used and radio frequency (RF), communication synchronization, and noise problems affect the performance very much. In particular, the sending of byte‐type data called synchronous and preamble before sending data in intermodule ...
Nihat Daldal +3 more
wiley +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source