Figure 4From: Adaptive Long-Term Coding of LSF Parameters Trajectories for Large-Delay/Very- to Ultra-Low Bit-Rate Speech CodingAverage spectral distortion (ASD) as a function of the average bit rate, calculated on the whole voiced test database, and for both the LSF LT coding and frame-by-frame LSF quantization. The plotted numbers are the resolutions (in bits/vector). For each resolution, the different points of each LT-coding curve cover the range of the ASD target.Back to article page