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Wei ge Chen, Ming Chieh Lee: Multi-level run length coding for frequency-domain audio coding. Microsoft Corporation, Klarquist Sparkman Campbell Leigh & Whinston, April 24, 2001: US06223162 (90 worldwide citation)

A technique for entropy coding information relating to frequency domain audio coefficients. For portions of a frequency spectrum having a predominate value of zero, a multi-level run length encoder statistically correlates sequences of zero values with non-zero values and assigns variable length cod ...


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Chen Wei Ge, Lee Ming Chieh: Multi-level run length coding for frequency-domain audio coding. Microsoft Corporation, WIGHT Stephen A, June 22, 2000: WO/2000/036753

The invention relates to entropy coding information relating to frequency domain audio coefficients, in particular, multi-level encoding of audio spectral frequency coefficients. Encoding is optimized for portions of a frequency spectrum, such as portions having a predominate value. In illustrated e ...