07027982 is referenced by 75 patents and cites 36 patents.

An audio encoder regulates quality and bitrate with a control strategy. The strategy includes several features. First, an encoder regulates quantization using quality, minimum bit count, and maximum bit count parameters. Second, an encoder regulates quantization using a noise measure that indicates reliability of a complexity measure. Third, an encoder normalizes a control parameter value according to block size for a variable-size block. Fourth, an encoder uses a bit-count control loop de-linked from a quality control loop. Fifth, an encoder addresses non-monotonicity of quality measurement as a function of quantization level when selecting a quantization level. Sixth, an encoder uses particular interpolation rules to find a quantization level in a quality or bit-count control loop. Seventh, an encoder filters a control parameter value to smooth quality. Eighth, an encoder corrects model bias by adjusting a control parameter value in view of current buffer fullness.

Title
Quality and rate control strategy for digital audio
Application Number
10/17694
Publication Number
7027982 (B2)
Application Date
December 14, 2001
Publication Date
April 11, 2006
Inventor
Ming Chieh Lee
Bellevue
WA, US
Naveen Thumpudi
Sammamish
WA, US
Wei Ge Chen
Issaquah
WA, US
Agent
Klarquist Sparkman
Assignee
Microsoft Corporation
WA, US
IPC
G10L 19/00
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