Research Article

Adaptive Variable Degree- 𝑘 Zero-Trees for Re-Encoding of Perceptually Quantized Wavelet Packet Transformed Audio and High-Quality Speech

Figure 4

Determining the factor 𝛼 for a randomly selected signal (a) average bit-rates and (b) their corresponding perceptual qualities versus 𝛼 .
145758.fig.004a
(a)
145758.fig.004b
(b)