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Recently, the forward error correction (FEC) codes are gaining popularity in video transmission community because of its capability of recovering lost packets in lossy wireless networks. The state-of-the-art scheme for FEC video transmission are the delay-aware fountain codes (DAF), which combine the ratelessness of fountain codes with the property of video coding. However, DAF assumes that all the...
We present a field programmable gate array (FPGA) based implementation of the H.264 video decoder algorithm. The novelty of our design is that the communication between the decoder modules is done using a network-on-chip (NoC). This makes our design scalable and easily integrated within larger future NoC based systems, where the same hardware platform can host other algorithms such as compression,...
An important feature of today's mobile devices is their ability to capture and display high resolution photos in an acceptable amount of time. These images are stored in flash memory on the mobile device using the JPEG codec which is almost a quarter of a century old but remains the industry standard. With increasing pixel counts on both mobile image sensors and screens, software solutions will struggle...
This paper describes a new 120 fps (frames per second) real-time HEVC encoder for higher frame rate video encoding and transmission. Modification in the flexible customizable software architecture of encoder LSIs makes it possible to achieve the temporally scalable HEVC encoding with upward compatibility for existing 60 fps-based systems. The encoder also achieves 4K/120fps video encoding in real...
Recent broadcast standards support Layered Division Multiplexing (LDM) to achieve graceful degradation as signal quality degrades at the receiver. LDM is accomplished by using different constellations within the same Radio Frequency (RF) spectrum. LDM thus enables delivering multiple service tiers in a single broadcast channel. LDM when used in conjunction with scalable source coding codecs such as...
The High Efficiency Video Coding (HEVC) standard, as the newest generation video coding standard issued in 2013, significantly improves compression performance relative to existing standards in about 50% bit-rate reduction for equal perceptual video quality with the cost of greatly increasing the computation complexity of the encoder/decoder. In order to improve the decoding efficiency, we design...
Image resolution in modern video processing and display systems are rocketing up in recent years. With the main stream video quality evolving from standard definition to high-definition, and further towards the emerging super high-definition, the bandwidth and power consumption of external memory are becoming serious bottlenecks. In this paper, frequency domain analysis is made on image down-sampling,...
The FSM-SADF model of computation is especially suitable for analysing real-time applications with input-dependent behaviour such as different modes, variable execution times and scalable parallelism. Although FSM-SADF specifies which scenario transitions are possible, it does not specify how and when they are decided at runtime. Multiple actors of a scenario, e.g. video stream header parsing, may...
The next generation video coding standard High Efficiency Video Coding (HEVC) provides better compression rate for high resolution videos, at the cost of substantially higher computational complexity. While some latest off-the-shelf consumer electronics support HEVC via ASIC solutions, software implementation of real-time HEVC remains an open challenge for resource-constraint embedded systems. In...
Recently, video traffic has rapidly increased, and a considerable portion of that is caused by wireless devices. Since video streaming services now require high data rates, IEEE 802.11 has been widely used to support them in the wireless environment. On the other hand, in densely populated areas (e.g., conference rooms), multiple video streaming services using a unicast method can result in exceeding...
360° video streaming to clients using Virtual Reality head mounted displays is a challenge for traditional video delivery. As transmission of the complete content in a desirable quality sacrifices a large fraction of available client and network resources, adaptivity to the user viewport promises substantial benefits. An efficient way to achieve viewport adaptive streaming without per-user or per-orientation...
In this paper, we propose a network coding solution to improve transmission reliability of scalable video coding (SVC) streams over lossy networks. Since scalable video coding produces various levels of quality with variable bitrates, we design a prioritized network coding scheme combining different encoding approaches: generation-based and sliding window based schemes. We carried out a performance...
In contrast to many image watermarking schemes, the suggested method is implemented in the JPEG compressed domain with no transcoding or decompression. Therefore, this scheme is highly efficient in real-time applications and suitable for multimedia information, which is rarely available in an uncompressed form. The proposed watermarking scheme is very flexible, and can be tailored to meet the requirements...
Video is the predominant data traversing theInternet. Increase in processing power, storage and screenresolution of mobile devices coupled with advances incommunication technologies has resulted in proliferation of videoapplications. Multiple data interfaces on a mobile device cansupport parallel data streams for high bandwidth and delaysensitive video streaming application. This paper investigatescombination...
In digital forensics, file carving of video files is an important process in the recovery of video evidence needed for many criminal cases. Traditional carving techniques recover video files based on their file structure. However, these techniques fail in cases where the file is split into several fragments, especially if some of the fragments were overwritten. In this paper, we present a method for...
The recent research studies showed that inter-layered network coding is a promising approach to provide the unequal error protection for scalable video multicast under the channel heterogeneity. The selection of the optimal transmission distribution performed at eNB increases the system performance with the cost of time and computational complexities. In this paper, we propose an optimal transmission...
All multimedia devices now incorporate video CODECs that comply with international video coding standards such as H.264 / MPEG4-AVC and the new High Efficiency Video Coding Standard (HEVC) otherwise known as H.265. Although the standard CODECs have been designed to include algorithms with optimal efficiency, large number of coding parameters that can be used to fine tune their operation, within known...
This work presents a comparison of two implementations of the last software version of The High Efficiency Video Coding (HEVC) decoder in a single low cost processor ARM Cortex-A series using NEON architecture which is a Single Input Multiple Data (SIMD). By using this technology of optimization, the whole execution time is reduced up to x4. We have analyzed separately all the blocks in the decoder...
Multicolored Matrix (MCM) Code is a two-dimensional color coded matrix. It consists a sequence of images rendered at an optimum frame rate to transfer simple data between portable devices such as a mobile phone. We introduce an untried channel-less short range communication technology, designed with limitless storage capacity, great structural stability and flexibility due to which it can work in...
Enormous usage of multimedia necessitates maintaining a secured environment. Security in multimedia communication can be achieved with many cryptographic techniques. Perceptual video encryption is an essential technique to prevent the unwanted use of the video which is transmitted. Encryption is used in order to maintain a safe content of data from attackers. This paper explains about the perceptual...
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