Patent ID: 7062445
Filing Date: 2006-06-13
Classification: G10L

Abstract:
1. In a computer system with a spectral audio data encoder having an actual bit-rate feedback, uniform, scalar quantizer, a method for reducing the number of iterations of a quantization loop for a block of spectral audio data, the method comprising: a) setting a polynomial that relates actual bit-rate to quantization threshold for spectral audio data in an actual bit-rate feedback, uniform, scalar quantizer, the initial coefficients for the polynomial set for typical spectral audio data; b) calculating a candidate quantization threshold for a block of spectral audio data based upon the polynomial; c) quantizing the block of data with the candidate quantization threshold; d) measuring bit-rate of output following compression of the quantized block; e) if the measured bit-rate falls within a pre-determined range below a target bit-rate, designating the candidate quantization threshold as final quantization threshold; else adjusting one or more coefficients of the polynomial and repeating b)-e).