In this paper, we studied the cascading of LZ variants to Huffman coding for multilingual documents. Two models are proposed: the static model and the adaptive (dynamic) model. The static model makes use of the dictionary generated by the LZW algorithm in the Chinese dictionary based Huffman compression to achieve better performance. The dynamic model is an extension of the static cascading mod...

If optimality is measured by average codeword length, Huffman's algorithm gives optimal codes, and the redundancy can be measured as the difference between the average codeword length and Shannon's entropy. If the objective function is replaced by an exponentially weighted average, then a simple modification of Huffman's algorithm gives optimal codes. The redundancy can now be measured as the d...

If pi(i = l , * . ,N)is the probability of the ith letter of amemoryless souree, the length li of the e o r r e s p d i n g binary HufFmancodeword can be very different from the d u e -logpi. For atypical letter, however, Ii = -log pi. Mote precisely, Pm=E {ill o g p -m)Pj < 2-" and P,'= zjE{il,,>-logp,+m)Pj <2-c(m15T1, &re; c = 227. Index Term.s-Huffman c...

In the previous correspondence we introduced a binary double error correcting long code (8 2 5), for 100% data correction. This paper evaluates the BER performance of UWB system using (8 2 5) code over UWB (SV) channel for image transmission. The simulation results presented here uses BPSK, as well as 2dimensional Hermite pulse modulation. Image to be transmitted over UWB channel is compressed ...

Data &lt;span&gt;transmission in orthogonal frequency division multiplexing (OFDM) system needs source and channel coding, the transmitted data suffers from bad effect of large peak to average power ratio (PAPR). Source code codes can be joined using different codes. Variable length error correcting (VLEC) is one these VLEC used mat lab simulation for image transmission OFDM system, compared fi...

A prefix code minimal with respect to a bitstring $x$ is where concatenation of its codewords and it this property. What the maximum size notation="LaTeX">$M(n)$ among all codes over bitstrings length notation="LaTeX">$n?$ In paper we...

We study the problem of compressed sensing with asymmetric prior information, as motivated by networking applications. We focus on the scenario in which a resource-limited encoder needs to report a small subset S from a universe of N objects to a more powerful decoder. The distinguishing feature of our model is asymmetry: the subset S is an i.i.d. sample from a prior distribution μ, and μ is on...

The strength of the inferences and conclusions that Huffman (2014) makes regarding the effectiveness of extensive reading (ER) relative to intensive reading (IR) at developing reading rate is excessive, and not valid considering the limitations of the methodology of his study. Huffman provides evidence of the effectiveness of ER in developing learners’ reading speed. When measuring reading spee...