System and method for enhanced artificial bandwidth expansion
First Claim
Patent Images
1. A method for expanding narrowband speech signals to wideband speech signals, the method comprising:
- determining signal type information from a signal;
obtaining characteristics for forming an upper band signal using the determined signal type information;
detecting babble noise in the signal based on a gradient index, enemy information, and a noise level estimate;
determining signal noise information, wherein the signal noise information is determined based on a far-end signal-to-noise ratio and a near-end signal-to-noise ratio;
using the determined signal noise information to modify the obtained characteristics for forming the upper band signal; and
forming the upper band signal using the modified characteristics.
3 Assignments
0 Petitions
Accused Products
Abstract
A method, device, system, and computer program product expand narrowband speech signals to wideband speech signals. The method includes determining signal type information from a signal, obtaining characteristics for forming an upper band signal using the determined signal type information, determining signal noise information, using the determined signal noise information to modify the obtained characteristics for forming the upper band signal, and forming the upper band signal using the modified characteristics.
-
Citations
11 Claims
-
1. A method for expanding narrowband speech signals to wideband speech signals, the method comprising:
-
determining signal type information from a signal; obtaining characteristics for forming an upper band signal using the determined signal type information; detecting babble noise in the signal based on a gradient index, enemy information, and a noise level estimate; determining signal noise information, wherein the signal noise information is determined based on a far-end signal-to-noise ratio and a near-end signal-to-noise ratio; using the determined signal noise information to modify the obtained characteristics for forming the upper band signal; and forming the upper band signal using the modified characteristics. - View Dependent Claims (2, 3, 4)
-
-
5. A communication device configured to receive wideband signals, the device comprising:
-
an interface that communicates with a wireless network; and programmed instructions stored in a memory and configured to expand received narrowband signals to wideband signals by adjusting an artificial bandwidth expansion algorithm based on noise conditions, wherein the noise conditions comprise a far-end signal-to-noise ratio and a near-end signal-to-noise ratio; and detect babble noise based on a gradient index, energy information, and a noise level estimate. - View Dependent Claims (6)
-
-
7. A device in a communication network that expands narrowband speech signals into wideband speech signals, the device comprising:
-
a narrowband codec that receives narrowband speech signals in a network; a wideband codec that communicates wideband speech signals to wideband terminals in communication with the network; and programmed instructions that expand the narrowband speech signals to wideband speech signals by adjusting an artificial bandwidth expansion algorithm based on noise conditions, wherein the noise conditions comprise a far-end signal-to-noise ratio and a near-end signal-to-noise ratio and detect babble noise based on a gradient index, energy information, and a noise level estimate.
-
-
8. A system for expanding narrowband speech signals to wideband speech signals, the system comprising:
-
means for determining signal type information from a signal; means for obtaining characteristics for forming an upper band signal using the determined signal type information; means for detecting babble noise based on a gradient index, energy information, and a noise level estimate means for determining signal noise information, wherein the signal noise information is determined based on a far-end signal-to-noise ratio and a near-end signal-to-noise ratio; means for using the determined signal noise information to modify the obtained characteristics for forming the upper band signal; and means for forming the upper band signal using the modified characteristics.
-
-
9. A computer program product, embodied in a computer-readable medium, that expands narrowband speech signals to wideband speech signals, the computer program product comprising:
computer code to; determine signal type information from a signal; obtain characteristics for forming an upper band signal using the determined signal type information; detect babble noise based on a gradient index, energy information, and a noise level estimate determine signal noise information, wherein the signal noise information is determined based on a far-end signal-to-noise ratio and a near-end signal-to-noise ratio; use the determined signal noise information to modify the obtained characteristics for forming the upper band signal; and form the upper band signal using the modified characteristics. - View Dependent Claims (10, 11)
Specification