Adaptive Huffman Coding

... will be used for the CIR system Information Theoretical Analysis Let us consider a system where opportunistic network coding [9] is used As described in Section 2, opportunistic Network Coding consists ... rate LDPC encoder for sink M UM Sink N N Sink CSI for all sinks(γ vector) Figure 3: Transmission scheme at source node for the proposed adaptive transmission sch...

Ngày tải lên: 21/06/2014, 11:20

... section The Long-Term Model for LSF Trajectories In this section, we first consider the problem of modeling the time-trajectory of a sequence of K consecutive LSF parameters These LSF parameters ... should be well suited to capture the global shape of LSF trajectories Formally, the DCM model is defined for each of the I LSF trajectories by P ωi (n) = ci,p c...

Ngày tải lên: 21/06/2014, 16:20

... residual image and proved that such images have properties different from natural images This suggests that transforms that work well for natural images may not be as well-suited for residual images For ... B: Direction Adaptive discrete wavelet transform for image compression IEEE Trans Image Process 16(5), 1289–1302 (2007) 23 Rolon, JC, Salembier, P: Generalized lifting fo...

Ngày tải lên: 21/06/2014, 17:20

... optimal network coding scheme with feedback to minimize decoding delay in each transmission round in erasure broadcast channels Efficient search algorithms for the optimal network coding solution, ... End-to-end decoding delay of a receiver is the sum of decoding delays for the receiver in each transmission step In the following, when we say “the delay pe...

Ngày tải lên: 21/06/2014, 18:20

... MISO /MIMO transmission with Alamouti space-time coding, and MIMO transmission with spatial multiplexing In the case of a single transmit antenna and for Alamouti mode, a single data stream is transmitted, ... runs of low reliable bits at the decoder input The interleaved bits are mapped adaptively to a symbol alphabet The coding, interleaving, and symbol mapping are the...

Ngày tải lên: 22/06/2014, 06:20

... evaluation of the proposed platform using H.264 and wavelet scalable coding for image and video data EVALUATION PLATFORM In order to validate the adaptive transmission of medical video and image data using ... work RELATED WORK IN SCALABLE CODING AND ADAPTIVE IMAGE AND VIDEO TELEMEDICINE SYSTEMS Scalable image and video coding has attrac...

Ngày tải lên: 22/06/2014, 19:20

... those using only single-layer coding and uniform MPSK either with or without JSCC The results are demonstrated in Figures 11 and 12 for the AWGN and Rician fading channels, respectively For the ... function of ES /NI in dB for 2-layer adaptive modulation and coding scheme for Rician fading channel with ζ = dB Fixed symbol transmission rate rS = 128 Ksps other...

Ngày tải lên: 22/06/2014, 19:20

... of coding gains is rarely possible in closed form especially for the DF-based cooperative systems even for simple constellations using repetition coding; see also [9] for similar comments For ... of the reencoding function used during Phase Particular cases of reencoding functions include (LAR based) (i) repetition coding, (ii) distributed complex field coding (DCFC), (iii) di...

Ngày tải lên: 22/06/2014, 19:20

... comparison of the proposed technique with all audio coding techniques would be out of the scope of this paper The objective of this paper is to demonstrate the application of ATFT for coding audio signals ... novel ATFT coding technique for wideband audio signals The proposed approach demon- 13 strated the application of adaptive time-frequency transform for a...

Ngày tải lên: 22/06/2014, 19:20

... Conference on Image Processing (ICIP ’03), vol 1, pp 633–636, Barcelona, Spain, September 2003 H Masmoudi, A Benazza-Benyahia, and J.-C Pesquet, Block-based adaptive lifting schemes for multiband image ... tool for exact and progressive coding Generally, the LS is applied to images in a separable manner as for instance in the 5/3 wavelet transform retained for the JPEG2000...

Ngày tải lên: 22/06/2014, 19:20

... chain for video transmission 2.1 Scalable video coding The scalable video codec considered in this paper is based on the wavelet transform performed in temporal and spatial domains [18] In this wavelet-based ... Shannon theory,” IEEE Transactions u on Information Theory, vol 44, no 6, pp 2057–2078, 1998 [2] Q Zhang, W Zhu, and Y.-Q Zhang, “Channel -adaptive resource allocat...

Ngày tải lên: 22/06/2014, 19:20

... needs to perform LSP The rest of this paper is organized as follows Section revisits the role of motion in video coding and emphasizes the difference between forward and backward adaptive modeling ... accuracy in video coding [17], difficulty with subpixel MC appears to be one of the major obstacles in the development of backward adaptive video coders To fully exploit the flexibilit...

Ngày tải lên: 22/06/2014, 23:20

... possible! Adaptive Huffman Code • 1-pass adaptive – build code and compress input simultaneously – code is built dynamically at both coder and decoder – code changes with each character encoded ! ENCODER ... a 01100001 b 01100010 Huffman table Huffman table Huffman table NYT NYT (1) a NYT (2) a Input: a Output: 001100001 NYT = Not Yet in Table a B 001000010 Adaptive Huf...

Ngày tải lên: 22/10/2015, 17:09

... locality, adaptive Huffman coding is sometimes able to better than static Huffman coding, i.e., for some messages, it can have a greater compression but we’ve assessed optimality of static Huffman coding, ... in the file In static Huffman coding, that character will be low down on the tree because of its low overall count, thus taking lots of bits to encode In adaptive huffm...

Ngày tải lên: 22/10/2015, 17:10