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As modern high performance computing systems have various ICs associated together, one of the most appreciated architecture is direct path passing through the intermediate chips. Inter-chip and intra-chip communication are linked together in this architecture. Therefore to remove crosstalk induced noise and improve signal integrity, a novel CAC and corresponding CODEC which can be applied for both...
Fast decoder of BCH code (31, 16, 7) which based on matrix algorithm of syndromes computation and parallel data processing was developed. Functional blocks of developed device based on block-based design were described. Device testing with coding and decoding modes and 50 MHz frequency was conducted.
Power, area, timing these three characteristics are very important in the design of low power VLSI systems, especially in the multimedia applications and portable devices like hearing aids, mobiles, personal digital assistants are running with battery. In the early complex designs, to achieve power, and area, we had a conventional codec design has become a major problem in the portable devices consumes...
At present, especially urgent task is ensuring a high level of the noise immunity of digital information channels (DIC) due to the constant tightening of requirements. For this purpose, the processing of the signal is carried out while preparing it for the transmission, generally using coding stages (concatenated coding) by block codes and continuous error-correcting codes including coded modulation...
Distributed Video Coding (DVC) is a video coding archetype that explores the source statistics at the decoder and hence reducing the encoder complexity. The Rate-Distortion (RD) performance of DVC strongly depends on the quality of the side information (SI) generation. So, efficient techniques to generate reliable SI are therefore essential to obtain a better quality of decoded video. In this paper,...
At present, especially urgent task is ensuring a high level of the noise immunity of digital information channels (DIC) due to the constant tightening of requirements. For this purpose, the processing of the signal is carried out while preparing it for the transmission, generally using coding stages (concatenated coding) by block codes and continuous error-correcting codes including coded modulation...
In this paper we show that a small amount of bit stream features can be used to accurately estimate the energy consumption of state-of-the-art software and hardware accelerated decoder implementations for four different video codecs. By testing the estimation performance on HEVC, H.264, H.263, and VP9 we show that the proposed model can be used for any hybrid video codec. We test our approach on a...
A delay-less packet-loss concealment (PLC) method for stationary tonal signals is presented, that addresses audio codecs utilizing a modified discrete cosine transformation (MDCT). In the case of a frame loss, tonal components are detected using the last two received spectra and their accompanied pitch information. Phases of the tonal components are subsequently predicted, aiming for a continuous...
This paper examines a method for controlling the energy of decoded signal at the recovery frame from a packet loss. Our observation unveiled that a packet loss before speech onset causes sudden increase in the amplitude of the decoded signal at the recovery frame when predictive quantization of line spectral frequency is used. To mitigate the artifact caused by the overshoot, a detector of the overshoot...
This paper presents the bandwidth extension (BWE) method developed for the AMR-WB interoperable (AMR-WB IO) modes of the 3GPP EVS codec. The low-band signal (0–6.4 kHz) is coded using an enhanced version of ACELP as in AMR-WB and post-processed; the high-band (above 6.4 kHz) in contrast to AMR-WB is represented with a new BWE method. The decoded low-band excitation is adaptively extended to high frequencies...
By combining the advantages of distributed video coding (DVC) and compressive sensing (CS), distributed compressive video sensing (DCVS) poses itself as a very promising low-complexity video coding framework for distributed applications. In order to improve the rate-distortion performance of DCVS, much research efforts have been focused on exploring the best ways to utilize the spatial/temporal redundancy...
The present day video coding standards such as MPEG and H.264 are mainly used for broadcast applications, where the encoder is more complex than the decoder. However, for applications such as low power surveillance networks and wireless video cameras, where there is a dearth of hardware at the encoder, the encoder needs to be simpler, but the decoder can be complex. Distributed Video Coding (DVC)...
Modern stereo and multi-channel perceptual audio codecs utilizing the modified discrete cosine transform (MDCT) can achieve very good overall coding quality even at low bit-rates but lack efficiency on some material with inter-channel phase difference (IPD) of about ±90 degrees. To address this issue a generalization of the lapped transform coding scheme is proposed which retains the perfect reconstruction...
Software watermarking involves embedding a unique identifier or, equivalently, a watermark value, within a software to discourage software theft; towards the embedding process, several graph theoretic watermarking algorithmic techniques encode the watermark values as graph structures and embed them in application programs. Recently, we presented an efficient codec system for encoding a watermark number...
Traditional audio codecs based on real-valued transforms utilize separate and largely independent algorithmic schemes for parametric coding of noise-like or high-frequency spectral components as well as channel pairs. It is shown that in the frequency-domain part of coders such as Extended HE-AAC, these schemes can be unified into a single algorithmic block located at the core of the modified discrete...
Context: energy consumption represents an important issue with limited and embedded devices. Such devices, e.g. Smartphones, process many images, both to render the UI and for application specific purposes. Goal: we aim to evaluate the energy consumption of different image encoding/decoding algorithms. Method: we run a series of experiments on a ARM based platform, and we collected the energy consumed...
We present a bidirectional, occlusion-aware temporal frame interpolation (BOA-TFI) scheme that builds upon our recently proposed highly scalable video coding scheme. Unlike previous TFI methods, our scheme attempts to put “correct” information in problematic regions around moving objects. From a “parent” motion field between two existing reference frames, we compose motion from both reference frames...
The Dynamic Compact Control Language (DCCL) provides a flexible and efficient way to marshall object-messages into very small datagrams. It is well suited to transmission over very low throughput links with small maximum transmission units, such as those commonly used in underwater (acoustic modem) and sea-surface (satellite) applications. DCCL provides a interface description language (IDL) and an...
The increasing number of standardized speech codecs implies interoperability issues between networks deploying different and sometime incompatible standards. To assure interoperability, transcoding from one codec format to another is necessary at gateways between networks. This transcoding reduces speech quality, involves computation load and additive delay. Recently, a fair amount of work has been...
Audio coding of harmonic signals is a challenging task for conventional MDCT coding schemes. In this paper we introduce a novel algorithm for improved transform coding of harmonic audio. The algorithm does not deploy the conventional scheme of splitting the input signal into a spectrum envelope and a residual, but models the spectral peak regions. The presented coding scheme is part of the recently...
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