Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Dynamic balance control for telephone










Image Number 8 for United States Patent #6990194.

A telephone includes a transmit channel and a receive channel, each including a bank of sub-band filters having a VAD coupled one to each sub-band filter. Each VAD measures the spectral energy in a sub-band, compares the spectral energy to a first threshold, and produces an output signal representative of whether or not the first threshold is exceeded. The voice activity detector also includes a threshold circuit for calculating a dynamically adjustable noise threshold based upon averaged measured spectral energy. A wide band or system VAD monitors echo canceling circuitry to detect voice activity and double talk. A dynamic balance control circuit maintains the transmit and receive channels in a predetermined energy ratio during double talk.








 
 
  Recently Added Patents
Use of physical deformation during scanning of an object to generate views of the object
OFDM control signaling in the presence of timing asynchronization in a peer-to-peer network
Error recovery storage along a memory string
Method for using a super-slippery thin layer characterized by the method for making same
Ion generation using wetted porous material
Variety corn line NPAA2675
Substituted bicyclic HCV inhibitors
  Randomly Featured Patents
Electrical connector
Torque transmission belt means
Membrane separation equipment
Method of making a promotional novelty device
Self operative cooling mechanism of can
Mobile phone
Card connector
Variable valve apparatus, and an engine apparatus and a transport machine having the same
Method to gain access to a base station in a discrete multitone spread spectrum communications system
High speed file I/O control system with user set file structure to effect parallel access pattern over a network