- Info
- This is archived material from the Federal Bureau of Investigation (FBI) website. It may contain outdated information and links may no longer function.
Table 7a
| Table 7a: Correlation values and differences for the clipped-sample restoration of the fourth sample sentence, using the
two programs. The differences are relative to the correlation values for the native-source to clipped-file comparisons, for each respective
file format. Negative values are contained in parentheses |
Sample Sentence #4 (Native to Clipped and
Restored) |
File
Format |
Amount
Clipped
(dB) |
Correlation
(to Clipped) |
Program #1 |
Program #2 |
Correlation
(to Restored) |
Difference |
Correlation
(to Restored) |
Difference |
8 kHz
8-bit |
+3 |
0.9966 |
N/A |
N/A |
0.9894 |
(0.0073) |
+6 |
0.9815 |
N/A |
N/A |
0.9573 |
(0.0242) |
+9 |
0.9542 |
N/A |
N/A |
0.9279 |
(0.0263) |
+12 |
0.9169 |
N/A |
N/A |
0.8859 |
(0.0310) |
11.025 kHz
8-bit |
+3 |
0.9970 |
0.9826 |
(0.0145) |
0.9592 |
(0.0378) |
+6 |
0.9830 |
0.9354 |
(0.0476) |
0.9178 |
(0.0652) |
+9 |
0.9567 |
0.8690 |
(0.0877) |
0.8957 |
(0.0610) |
+12 |
0.9199 |
0.8225 |
(0.0974) |
0.8541 |
(0.0658) |
11.025 kHz
16-bit |
+3 |
0.9971 |
0.9826 |
(0.0145) |
0.9599 |
(0.0372) |
+6 |
0.9830 |
0.9334 |
(0.0496) |
0.9127 |
(0.0703) |
+9 |
0.9565 |
0.8812 |
(0.0753) |
0.8738 |
(0.0827) |
+12 |
0.9204 |
0.8036 |
(0.1168) |
0.8634 |
(0.0570) |
16 kHz
8-bit |
+3 |
0.9971 |
0.9968 |
(0.0003) |
0.9914 |
(0.0056) |
+6 |
0.9830 |
0.9811 |
(0.0019) |
0.9759 |
(0.0071) |
+9 |
0.9567 |
0.9430 |
(0.0137) |
0.9512 |
(0.0055) |
+12 |
0.9198 |
0.9124 |
(0.0074) |
0.9038 |
(0.0160) |
16 kHz
16-bit |
+3 |
0.9974 |
0.9985 |
0.0011 |
0.9953 |
(0.0021) |
+6 |
0.9837 |
0.9864 |
0.0027 |
0.9837 |
(0.0001) |
+9 |
0.9574 |
0.9620 |
0.0046 |
0.9526 |
(0.0048) |
+12 |
0.9215 |
0.9135 |
(0.0080) |
0.9053 |
(0.0162) |
|
|
|