Table 7 Reduction in the processing time of proposed DCT architecture for various number of bits (N) ignored for row comparison
From: Implementation of computation-reduced DCT using a novel method
Name of image | Processing time of comparison unit (ns) | Processing time of DCT alone (ns) | N = 0 | N = 1 | N = 2 | N = 3 | N = 4 | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total processing time of proposed design (μs) | % processing time reduction | Total processing time of proposed design (μs) | % processing time reduction | Total processing time of proposed design (μs) | % processing time reduction | Total processing time of proposed design (μs) | % processing time reduction | Total processing time of proposed design (μs) | % processing time reduction | |||
Lena | 0.9 | 21.6 | 178.9 | −1.0 | 157.6 | 11.0 | 130.7 | 26.1 | 100.2 | 43.4 | 68.4 | 61.4 |
Cameraman | 0.9 | 21.6 | 167.2 | 6.0 | 144.3 | 18.0 | 129.5 | 26.9 | 115.3 | 34.9 | 96.6 | 45.4 |
Rice | 0.9 | 21.6 | 183.9 | −4.0 | 177.0 | 0.0 | 156.5 | 11.6 | 124.7 | 29.5 | 91.6 | 48.3 |
Mandrill | 0.9 | 21.6 | 184.2 | −4.0 | 182.0 | −3.0 | 174.0 | 1.7 | 155.0 | 12.4 | 115.1 | 35.0 |
Pirate | 0.9 | 21.6 | 183.3 | −4.0 | 179.8 | −2.0 | 169.7 | 4.1 | 149.0 | 15.8 | 113.6 | 35.8 |
Peppers | 0.9 | 21.6 | 184.5 | −4.0 | 180.4 | −2.0 | 163.8 | 7.4 | 123.9 | 30.0 | 82.5 | 53.4 |