The JBIG2 standard for lossy and lossless bi-level image coding is a very flexible encoding strategy based on pattern matching techniques. This paper addresses the problem of compressing text images with JBIG2. For text image compression, JBIG2 allows two encoding strategies: SPM and PM&S. We compare in detail the lossless and lossy coding performance using the SPM-based and PM&S-based JBIG2, i...

Coherent symbol by symbol detection using fractionally spaced samples in a time-varying frequency at Rayleigh fading channel is presented. The proposed detector incorporates a decision feedback (DF) maximum a posteriori (MAP) channel estimator that can be applied to a timevarying at Rayleigh fading channel with an arbitrary but known spaced-time correlation function. The best achievable bit err...

One key technique for improving the coding efficiency of H.264 video standard is the entropy coder, contextadaptive binary arithmetic coder (CABAC). However the complexity of the encoding process of CABAC is significantly higher than the table driven entropy encoding schemes such as the Huffman coding. CABAC is also bit serial and its multi-bit parallelization is extremely difficult. For a high...

We generalize Contou-Carrère symbols to higher dimensions. To an ( n + 1 stretchy="false">) <mml:annotation ...

I present a method for lossy transform coding of digital audio that uses the Weyl symbol calculus for constructing the encoding and decoding transformation. The method establishes a direct connection between a time-frequency representation of the signal dependent threshold of masked noise and the encode/decode pair. The formalism also offers a time-frequency measure of perceptual entropy.

Transmission over Rician fading channels with unknown carrier phase is considered. Differential encoding of APSK constellations at the transmitter and non–coherent demodulation without channel state information/ carrier phase estimate at the receiver are applied. In this paper, various differential encoding strategies suited for multiple symbol detection are presented and compared. In particula...

This paper examines the asymmetry effects of third user interference on IrDA FIR links at 4 Mbps employing 4PPM encoding. The analysis examines the variation in the interference-signal ratio (ISR) with the distance and orientation of an interfering device which affects the error probability of the PPM symbol.

| Multilevel coding and bit{interleaved coded modulation employing diierential encoding and non{coherent reception over at fading channels are assessed. In order to achieve high bandwidth eeciencies mixed amplitude/phase modulation is performed. It is shown that multiple symbol detection only provides gains for multilevel coding as Gray labeling of the diierential symbols is not possible.

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With the development of science and technology, more emerging technologies have been integrated into electronic music, forming a rich diverse form interactive music. This research mainly discusses collaborative music creation method based on bit matrix code image acquisition. In decoding process, displacement value each point should be determined according to direction distance from reference c...