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A 4K×2K H.265/HEVC video codec chip is fabricated in a 28nm CMOS process with a core area of 2.16mm2. This LSI chip integrates a dual-standard (H.265 and H.264) video codec and a series of prevalent (VC-1, WMV-7/8/9, VP-6/8, AVS, RM-8/9/10, MPEG-2/4) decoders into a single chip. It contains 3,558K logic gates and 308KB of internal SRAM. Moreover, it simplifies intra/inter-rate-distortion optimization...
Internet video coding (IVC) is an exploration within MPEG to develop a video compression technology that is expected of royalty-free and targeted to the compression performance comparable to MPEG-4 AVC/H.264 Constrained Baseline Profile (CBP). IVC codec has been steadily enhanced since 2011, so it is valuable to report comparison results in the progress. In this paper, we evaluate the codec performance...
Encoding multimedia streams of video calls is a very compute-intense task that significantly decreases battery lifetime of mobile phones. This paper introduces an approach to reduce power consumption of mobile phones by offloading video encoding efforts from mobile devices to external services. These services are hosted on servers co-located with cellular base stations. The paper describes how these...
We present an extension of the graph theory analysis of encoding/decoding delay in multiview video coding schemes for hardware devices with limited processing capacity. With this, we provide a unified methodology for the analysis of multiview delay in device models with unlimited and limited processing capacity.
The H.265/MPEG-HEVC is the latest video coding standard, which achieves an increase of about 50% in coding efficiency compared to its predecessor H.264/MPEG-AVC. Ever since H.265/MPEG-HEVC was designed to replace almost all existing H.264/ MPEG-AVC codecs, high-resolution video coding beyond High Definition (4K, 8K, etc.) has drawn more attention. On the other hand, it's well known that reference...
This paper presents a performance evaluation of the three newest video coding standards Advanced Video Coding (H.264/MPEG-AVC), High-Efficiency Video Coding (H.265/MPEG-HEVC) and VP9 on the basis of subjective and objective quality evaluations. The main goal of the encoder is to compress video contents. In this paper, the compression of High Definition (HD) and Ultra High Definition (UHD) video contents...
Motion JPEG simply compresses each frame in a video sequence using JPEG still image compression standard. This video codec satisfies power consumption and real-time properties of embedded systems while having very low complexity. However, the downside is its inefficiency in reducing the bit-rate because there are still redundancies between encoded frames. In this paper, we focus on reducing temporal...
Wireless technology for audio transmitting has many aspects of use. This paper describes one solution of a wireless audio system based on G.722 codec. One of a major problem in wireless technology is an electromagnetic interferences which can corrupt transmitted data. To protect against that problem, FEC (Forward Error Correction) technique was developed. One implementation of FEC is described in...
Video file carving is crucial to computer forensic« and very challenging for researchers. Identification of related data plays a key role in video file carving. Most researches on this topic rely on statistical analysis by establishing a machine learning model. However, they didn't show good performance on video data. It is almost impossible to give a general method to classify all kinds of file blocks...
To combat with multiple-users interference and malicious eavesdropping, this talk presents a double signatures scrambling scheme over wavelength/time for a cryptographic optical code-division multiple-access (OCDMA) network data transmissions. Optical switches and fiber delay lines are placed with arrayed-waveguide grating (AWG) coder/decoders (codecs) to realize wavelength-spreading and time-hopping...
In this paper, we propose a bitstream syntax reconfiguration approach to improve coding efficiency of video codec. The video compression within a codec is conducted by several compression tools, and the usage of the tools is dependent on how bitstream syntax is composed. Accordingly, proper modification on the bitstream syntax may leads to the improved usage of compression tools, resulting in the...
I-frame affects image quality seriously, but costs enormous bits in video coding processing. In order to optimize the increasing bit rate caused by I-frame, we design a novel video codec based on residual image for the latest video coding standard HEVC. An appropriate method to obtain residual image is proposed depend on the characteristic analysis. The proposed codec reduces considerably by up to...
Virtual screen system is becoming an essential part in the mobile cloud computing platform. However, designing a low-latency interactive communication for the high-resolution screen content is still challenging due to the network dynamics and the unique characteristics of screen content. In this paper we propose a H.264 based low-latency screen sharing system. To achieve high play-out frame rate,...
In this paper, we discuss the improvement of MPEG Syntactic Description Language (MSDL) for its usage in the MPEG Reconfigurable Media Coding (RMC) framework. We have tested the description performance of the proposed language through experiments based on MPEG-4 Simple Profile bitstream syntax.
In this work a novel lossless coding approach for color images is considered. It is based on local-adaptive combination of inter- and intra-component prediction. New context modeling method based on decomposition to binary layers is used for prediction errors. Compression performance of proposed algorithm is proved by experimental results obtained for popular public benchmarks.
The multi-view video coding (MVC) extension of H.264/AVC is one of the well-known codecs for generating 3D views. It allows for multiple cameras to capture a scene from different views or perspectives to create a 3D output. In this paper, we shall introduce a new method to implement within the codec that enables the merging of multiple matrices of pictures (MOPs) from different participants to produce...
Wavelet-based coding systems commonly employ uniform scalar deadzone quantization (USDQ) together with a bitplane coding strategy to progressively refine image quality. Our previous work presents a quantization scheme that employs 2 step sizes depending on the magnitude of the coefficients. This 2-step scalar deadzone quantization (2SDQ) scheme is introduced in the framework of JPEG2000 by modifying...
In this paper, an embedded stereo coding algorithm is proposed. It is developed for the multiple participants video conference. The proposed algorithm is an embedded stereo tool, which can be grouped with any mono voice codec (e.g. AMR-WB, SILK etc.). Subband coding and transform coding methods are used for the proposed stereo tool. Simulation results show that the proposed the stereo voice codec...
Nonvolatile (NV) processors have attracted much attention in recent years due to their zero standby power, resilience to power failures, and instant-on feature. One design challenge of NV processors is the excess area needed by NV registers. This paper introduces a parallel compare and compress (PaCC) architecture to reduce such excess area. A key component of the PaCC architecture is a new codec...
In this paper we evaluate four mainstream video encoders: H.264/MPEG-4 Advanced Video Coding, Google's VP8, High Efficiency Video Coding, and Google's VP9, studying conventional figures-of-merit such as performance in terms of encoded frames per second, and encoding efficiency in both PSNR and bit-rate of the encoded video sequences. Additionally, two platforms equipped with a large number of cores,...
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