ELEC 301: Text Independent Speaker Recognition- Results

ELEC 301 Final Project: Text Independent Speaker Recognition

Results

The output of our system yielded correct identification roughly 70% of the time. As one can see, the pitch similarity values usually narrow down the selection to one or two speakers. For our six speakers, we can adequately use mean pitch alone as a good guess for speaker identification. However, on the trials where our system failed, the pitch information is more similar to another user, as is all the cepstral data. Thus, in our trials, using pitch information did not really play a major role. It should be noted that in each successful trial, the cepstral data alone would have determined the correct speaker.

We should also mention the way we arrived at our final "mean similarity". We used a slight variation of the RMS method, but did not actually average the squares. I.e. mean_similarity = (sim_mfcc^2 + sim_dmfcc^2 + ... )^0.5. All the same, though, the pitch similarity measure in some cases clearly validates the cepstral results being sometimes 10 times greater than that of the other speakers. detailed results are depicted in the table below:

Trial 1:
True Speaker: Male 1.
Identified Speaker: Male 1.
Test sample length: 21.0s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1703 0.1549 0.1582 0.1724 0.1812 0.1629

DMFCC similarity: 0.1854 0.1613 0.1539 0.1755 0.1623 0.1615

DDMFCC similarity: 0.1787 0.1700 0.1437 0.1818 0.1655 0.1603

Pitch similarity: 0.5306 0.0748 0.0736 0.0718 0.1851 0.0641

Mean similarity: 0.3087 0.2809 0.2634 0.3059 0.2943 0.2799

Trial 2:
True Speaker: Male 1.
Identified Speaker: Male 1.
Test sample length: 10.25s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1607 0.1716 0.1528 0.1666 0.1784 0.1698

DMFCC similarity: 0.1897 0.1622 0.1459 0.1643 0.1655 0.1723

DDMFCC similarity: 0.1691 0.1812 0.1510 0.1716 0.1605 0.1665

Pitch similarity: 0.6102 0.0351 0.0528 0.0512 0.2198 0.0309

Mean similarity: 0.3007 0.2977 0.2597 0.2902 0.2915 0.2937

Trial 3:
True Speaker: Male 2.
Identified Speaker: Male 2.
Test sample length: 19.25s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1426 0.1952 0.1469 0.1573 0.1713 0.1868

DMFCC similarity: 0.1554 0.1896 0.1475 0.1555 0.1696 0.1825

DDMFCC similarity: 0.1500 0.1985 0.1427 0.1652 0.1633 0.1803

Pitch similarity: 0.1273 0.3998 0.0633 0.0624 0.0976 0.2495

Mean similarity: 0.2588 0.3368 0.2524 0.2761 0.2911 0.3173

Trial 4:
True Speaker: Male 2.
Identified Speaker: Male 2.
Test sample length: 13.75s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1368 0.2027 0.1535 0.1593 0.1602 0.1876

DMFCC similarity: 0.1566 0.1878 0.1505 0.1658 0.1598 0.1795

DDMFCC similarity: 0.1471 0.2048 0.1457 0.1644 0.1586 0.1794

Pitch similarity: 0.0756 0.5379 0.0403 0.0398 0.0598 0.2466

Mean similarity: 0.2547 0.3439 0.2596 0.2827 0.2763 0.3156

Trial 5:
True Speaker: Female 1.
Identified Speaker: Male 3.
Test sample length: 10.75s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1390 0.1658 0.1770 0.1621 0.2050 0.1512

DMFCC similarity: 0.1655 0.1735 0.1527 0.1716 0.1766 0.1601

DDMFCC similarity: 0.1530 0.1892 0.1490 0.1721 0.1695 0.1673

Pitch similarity: 0.0844 0.0425 0.3454 0.3788 0.1092 0.0396

Mean similarity: 0.2648 0.3055 0.2772 0.2921 0.3193 0.2765

Trial 6:
True Speaker: Female 1.
Identified Speaker: Female 2.
Test sample length: 20.5s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1446 0.1631 0.1713 0.1768 0.1857 0.1585

DMFCC similarity: 0.1615 0.1723 0.1639 0.1684 0.1686 0.1653

DDMFCC similarity: 0.1594 0.1848 0.1519 0.1760 0.1659 0.1620

Pitch similarity: 0.1015 0.0536 0.3227 0.3440 0.1279 0.0502

Mean similarity: 0.2691 0.3007 0.2816 0.3010 0.3007 0.2805

Trial 7:
True Speaker: Female 2.
Identified Speaker: Female 2.
Test sample length: 20.0s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1313 0.1693 0.1710 0.1805 0.1991 0.1488

DMFCC similarity: 0.1576 0.1822 0.1589 0.1793 0.1657 0.1563

DDMFCC similarity: 0.1533 0.1845 0.1542 0.1793 0.1615 0.1673

Pitch similarity: 0.0619 0.0297 0.3688 0.4294 0.0826 0.0276

Mean similarity: 0.2561 0.3047 0.2797 0.3112 0.3052 0.2731

Trial 8:
True Speaker: Male 3.
Identified Speaker: Male 3.
Test sample length: 18.0s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1410 0.1599 0.1525 0.1768 0.2024 0.1673

DMFCC similarity: 0.1662 0.1701 0.1554 0.1713 0.1728 0.1643

DDMFCC similarity: 0.1626 0.1769 0.1516 0.1796 0.1673 0.1621

Pitch similarity: 0.1195 0.0260 0.0680 0.0651 0.6980 0.0234

Mean similarity: 0.2719 0.2929 0.2653 0.3047 0.3143 0.2851

Trial 9:
True Speaker: Male 3.
Identified Speaker: Male 3.
Test sample length: 21.5s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1421 0.1586 0.1606 0.1765 0.1977 0.1645

DMFCC similarity: 0.1688 0.1661 0.1581 0.1654 0.1730 0.1686

DDMFCC similarity: 0.1709 0.1782 0.1553 0.1689 0.1630 0.1638

Pitch similarity: 0.1481 0.0348 0.0991 0.0946 0.5922 0.0313

Mean similarity: 0.2791 0.2907 0.2737 0.2950 0.3092 0.2869

Trial 10:
True Speaker: Male 4.
Identified Speaker: Male 4.
Test sample length: 14.75s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1342 0.1811 0.1485 0.1611 0.1557 0.2194

DMFCC similarity: 0.1553 0.1759 0.1526 0.1599 0.1580 0.1983

DDMFCC similarity: 0.1599 0.1843 0.1511 0.1747 0.1527 0.1774

Pitch similarity: 0.1081 0.2823 0.0734 0.0727 0.0946 0.3688

Mean similarity: 0.2602 0.3126 0.2611 0.2864 0.2693 0.3448

Trial 11:
True Speaker: Male 4.
Identified Speaker: Male 2.
Test sample length: 21.6s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1386 0.1743 0.1825 0.1501 0.1758 0.1788

DMFCC similarity: 0.1528 0.1830 0.1602 0.1556 0.1663 0.1821

DDMFCC similarity: 0.1563 0.1926 0.1557 0.1676 0.1601 0.1677

Pitch similarity: 0.0217 0.7423 0.0124 0.0123 0.0177 0.1936

Mean similarity: 0.2588 0.3177 0.2884 0.2735 0.2902 0.3053

Trial 12:
True Speaker: Male 4.
Identified Speaker: Male 2.
Test sample length: 10.5s

Speaker: Male 1 Male 2 Female 1 Female 2 Male 3 Male 4

MFCC similarity: 0.1347 0.1727 0.1556 0.1762 0.1885 0.1722

DMFCC similarity: 0.1531 0.1796 0.1575 0.1740 0.1645 0.1712

DDMFCC similarity: 0.1535 0.1908 0.1561 0.1652 0.1646 0.1697

Pitch similarity: 0.0271 0.7752 0.0151 0.0149 0.0219 0.1459

Mean similarity: 0.2553 0.3138 0.2710 0.2977 0.2995 0.2963

Results