Dither and data compression

Dither and data compression

This correspondence presents entropy analyses for dithered and undithered quantized sources. Two methods are discussed that reduce the increase in entropy caused by the dither. The first method supplies the dither to the lossless encoding-decoding scheme. It is argued that this increases the complexity of the encoding-decoding scheme. A method to reduce this complexity is proposed. The second m...

Data hiding in audio signal using Rational Dither Modulation

A data hiding system in audio signals based on a Rational Dither Modulation is proposed, which hides information in the Modulated Complex Lapped Transform (MCLT) domain. The proposed system is able to hide around of 689 bits per second, while keeping a CD-quality audio signal. Objective and subjective evaluations show robustness to classical attacks and transparency to the Human Auditory System...

Did Darwin dither?

" That's one of the things that really surprised us, " said Williams. " The tropics have very little variability from year to year in temperature; they are a very stable climatic zone. So species that live in these climates expect a limited degree of variability. " Other studies have suggested that the Amazon basin, an extremely biologically rich region, may be at increased risk of forest fires...

Hierarchical graph color dither

Quantization and Dither: A Theoretical Survey*

A theoretical survey of multibit quantization is presented, beginning with the classical model of undithered quantization and proceeding to modern statistical models of undithered, subtractively dithered, and nonsubtractively dithered quantizing systems. Properties of the error and output signals for each type of system are examined in relation to the input, using both firstand second-order sta...