Constrained covariance matrix estimation for robust adaptive microphone array beamforming

Alastair H. Moore, Mike Brookes and Patrick A. Naylor

Each test case contains

• Target speech (male, 0 degrees) @ 0 dBr
• Spatially white noise @ -20 dBr

Additional noise sources are listed by test case. The level of each active noise source is 0 dBr.

Test case 1

• Babble from all 16 directions on horizontal plane
• Interferer speech (male, -67.5 degrees - i.e. left)

Test case 2

• Babble from all 16 directions on horizontal plane
• Interferer speech (male, -67.5 degrees - i.e. left)
• Interferer speech (female, 67.5 degrees - i.e. right)

Test case 3

• Babble from 7 directions on left side of horizontal plane (22.5 degrees <= azimuth <= 157.5 degrees)

Test case 4

• Babble from 7 directions on left side of horizontal plane (22.5 degrees <= azimuth <= 157.5 degrees)
• Interferer speech (male, -67.5 degrees - i.e. left)

Test case 5

• Babble from all 16 directions on horizontal plane
• Interferer speech (male, -67.5 degrees - i.e. left)
• Head rotated with respect to scene such that target is at -7.5 degrees

Test case 6

• Babble from all 16 directions on horizontal plane
• Interferer speech (male, -67.5 degrees - i.e. left)
• Head rotated with respect to scene such that target is at -15 degrees