US Patent 7,539,254
United States Patent and Trademark Office
University of Iowa Research Foundation (Iowa City, IA, US)
This invention provides a method and system for determining the number of bits to assign to a frequency range in a signal. The present invention is capable of bit allocation, with B total bits, among a plurality of N frequency ranges in time a time O(N log N), which is independent of the size of B. Embodiments of the present invention have many practical applications, including allocating bits among sub-channels in a multi-carrier communication system, and allocating bits among sub-bands in a signal representing digital multimedia, such as in JPEG or MPEG compressed files.
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Dasgupta, Soura; Vemulapalli, Manish; and Pandharipande, Ashish Method and system for optimal bitloading in communication and data compression systems. US Patent 7,539,254 filed May 11, 2005 and issued May 26, 2009. https://ir.uiowa.edu/patents/484