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This paper presents a decoder for multi-carrier modulated signals employing Faster-than-Nyquist (FTN) signaling. FTN signaling is a method of improving bandwidth efficiency at the expense of higher processing complexity in the transceiver. The decoder can switch between orthogonal and FTN signaling modes and exploits channel properties to improve bandwidth efficiency. The decoder is fabricated in...
A 40 nm DAC-based CMOS wideband transmitter (WBTX) for cable applications is presented. It has a 2.2 GHz signal bandwidth and exhibits an in-band IM3 of less than −58 dBc. The WBTX consists of a current-steering DAC with digital sinc equalization and roll-off compensation. By implementing high-speed, feed-forward pipelined digital logic, the DAC sampling rate extends to 5 GHz. The WBTX can deliver...
Widespread application of multimedia wireless services and requirement of ubiquitous access have triggered rapidly booming energy consumption at both transmitter and the receiver sides. Hence, energy-efficient design in wireless networks is very important and is becoming an inevitable trend. In this paper, we take decoding power into consideration when studying joint transmitter and receiver design...
This paper studies the Implicit Error Correction (IEC) near-Video on Demand (nVoD) schema, which relies on the intrinsic redundancy of nVoD protocols, in channels that deliver damaged data. The results rather than discard show that IEC provides good protection against errors without increasing the bandwidth requirements of other schemas for the same error probability.
In this paper, the autocorrelation-based frame lossless recompression algorithm (AFLR) is proposed. The AFLR can save the memory bandwidth of video coding systems and preserves the visual-quality. The AFLR consists of two core techniques: (1) Correlation-based prediction technique, (2) Correlation-adaptive Golomb-Rice code. Furthermore, the relative block-based memory addressing (RBMA) is also proposed...
a 3D Blu-ray-compliant multimedia processor integrating video decoder, display and graphic engines is presented. To cope with the bandwidth/cost-starved Blu-ray system, this design exploits the time-sharing techniques, leading to 31.3% and 29.1% of area reduction in display and decoder parts. Moreover, a graphic and on-screen-display hardwired handshake effectively reduces the DRAM space by 40%. A...
One of the important problems in communication is sending specific data privately. In addition to cryptography which was used many years ago, methods such as data hiding have been introduced in recent years. In data hiding, specific data is embedded in another signal, which is known as a host signal that can be in the form of video, image and audio. Because of narrow bandwidth limitation, speech signal...
As the key infrastructure of cloud computing, data center network provides routing and transport services for cloud applications. To ensure reliable data delivery, TCP has been used in data centers as the de facto transport layer protocol. However, recently researchers found that when a client has a barrier-synchronized requirement and requests data from many servers, the good put may experience collapse...
We consider the transmission of a memoryless Gaussian source over a power-constrained Rayleigh fading channel with additive white Gaussian noise. We propose the use of low-delay joint source-channel mappings and consider optimizing the non-parametric mappings through an iterative process. A design algorithm for joint source-channel mapping is proposed and numerically evaluated for 2:1, 3:1, and 4:1...
This paper presents the Reference Frame Context Adaptive Variable-Length Compressor (RFCAVLC) for video coding systems. RFCAVLC aims to reduce the external memory bandwidth required to carry out this process. Six experiments were performed, all based on adaptations of the Huffman algorithm, and the best experiment achieved an average compression rate of more than 24% without any loss in quality for...
Due to the use of commodity software and hardware, crash-stop and Byzantine failures are likely to be more prevalent in today's large-scale distributed storage systems. Regenerating codes have been shown to be a more efficient way to disperse information across multiple nodes and recover crash-stop failures in the literature. In this paper, we present the design of regeneration codes in conjunction...
Precise bilateral teleoperation based on wide-band signals enables an operator to achieve complicated tasks. A short sampling period is required for acquisition and transmission of wide-band signals. The sampling period is limited, however, when controllers are connected through a network. In this paper, a coding and decoding scheme for wide-band bilateral teleoperation is proposed. The method uses...
8K×4K Super Hi-Vision (SHV) offers a significantly enhanced visual experience relative to 1080p, and is on its way to being the next digital TV standard. In addition, advanced 3DTV specifications involving a large number of camera views are targeted by emerging applications such as free-viewpoint TV (FTV). This paper presents a single-chip design that supports real-time H.264 decoding of SHV or up...
Full HD video coding has become an essential requirement for consumer mobile applications. The functionality ranges from single channel encoding (camcorder) and decoding (video playback), to more complex use cases such as video conferencing (encode + decode) and transcoding. There is increasing demand for higher visual quality, and the wide spectrum of video content requires support for multiple standards...
Frame compatible stereo video delivery has become a de-facto standard because it enables the delivery of stereoscopic information over legacy devices that can currently only decode a 2D signal. At the cost of reducing spatial resolution of the images, frame compatible delivery also reduces the bandwidth requirements for signaling stereoscopic 3D video. The new generations of playback devices are less...
In this paper we propose a low-bandwidth two-level inter-frame/inter-view cache architecture for a view scalable multi-view video decoder, which adopts two decoder cores to decode multi-view videos in parallel. The first level L1 cache is developed for the single video decoder core, which is able to reduce 60% bandwidth in doing inter-frame prediction in average. Moreover, we develop the second level...
The problem of sending two Gaussian sources over the Gaussian multiple access channel (MAC) with bandwidth expansion is studied. In this problem, two distributed transmitters desire to describe the two Gaussian sources to a common receiver subject to desired communication quality requirements and bandwidth expansion constraint. Of our interests is the minimum power and the transmission schemes to...
Network-on-chip (NoC) architecture provides the communication infrastructure for system-on-chip (SoC) design. The architecture, size, and algorithm dominate the performance of NoC and influence on the design of arbiters in the switch. FIFO buffers are essential components of network switches-buffers have been estimated to be the single largest power consumer for a typical switch in an on-chip network...
In this paper, we propose a structured peer-to-peer (P2P) distribution scheme based on Fast Fourier Transform (FFT) graphs. We build a peer-to-peer network that reproduces the FFT graph initially designed for hardware FFT codecs. This topology allows content delivery with a maximum diversity level for a minimum global complexity. The resulting FFT-based network is a structured architecture with an...
Multipacket reception (MPR) capability provides the opportunity to improve bandwidth utilization while reducing complexity of the medium access control layer. Specifically, it has been shown that ALOHA random access tends to become asymptotically optimal as the receiver's joint decoding capability of the receiver grows to infinity. However, the average traffic offered to the medium is required to...
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