Table 3 SNR (in dB) of DCT-based transform code designs for quantizing 16-dimensional vectors (M1 = M2 = 16) of source model B (α = 0.32, θ = 0.9) at R1 = R2 = R bits/sample
R | IDCT | SP-DDCT | |||
|---|---|---|---|---|---|
(bits/sample) | EC-SQ | EC-TCQ | CEC-SQ | CEC-TCQ | |
0.5 | 7.9 | 9.1 | 11.7 | 12.6 | (Analytical) |
8.0 | 8.4 | 11.0 | 12.0 | (design) | |
1 | 11.9 | 13.2 | 15.9 | 17.8 | |
11.9 | 12.6 | 16.6 | 17.0 | ||
1.5 | 15.3 | 16.8 | 19.7 | 21.9 | |
15.3 | 16.1 | 20.5 | 21.3 | ||
2 | 18.9 | 20.3 | 23.6 | 25.6 | |
18.7 | 19.4 | 24.5 | 25.1 | ||