06223162 is referenced by 90 patents and cites 23 patents.

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 code words. An encoder uses a specialized code book generated with respect to the probability of receiving an input sequence of zero-valued spectral coefficients followed by a non-zero coefficient. A corresponding decoder associates a variable length code word with a sequence of zero value coefficients adjacent a non-zero value coefficient.

Title
Multi-level run length coding for frequency-domain audio coding
Application Number
9/211277
Publication Number
6223162 (B1)
Application Date
December 14, 1998
Publication Date
April 24, 2001
Inventor
Ming Chieh Lee
Bellevue
WA, US
Wei ge Chen
Issaquah
WA, US
Agent
Klarquist Sparkman Campbell Leigh & Whinston
US
Assignee
Microsoft Corporation
WA, US
IPC
G10L 19/00
View Original Source