Resources Contact Us Home
Codec system and method

Image Number 8 for United States Patent #7239253.

A sound codec including a compression portion and a decompression portion. The compression portion separates the incoming sound packet bandwidth into frequency sub-bands using a bank of infinite impulse response (IIR) filters. In accordance with the invention, the lower frequency signals are divided into more sub-bands than the higher frequency signals. Once the signals are divided into sub-bands, each sub-band signal is quantized. The resulting signals of all of the quantized sub-bands are then sent out over a communications link along with the filter state at the end of each sound packet. The decompression portion recombines the individual sub-band signals together (using a bank of infinite impulse response (IIR) filters) to form the audio data using the filter states to configure the reconstruction.

  Recently Added Patents
Group handover method and apparatus in broadband wireless communication system that supports mobile relay station
Polymeric matrix materials for infrared metamaterials
Method for forming an integrated circuit
Components, turbochargers, and methods of forming the components
Command line interface robustness testing
Systems and methods for producing hyperpolarized materials and mixtures thereof
Flexible energy filter for ion beam therapy
  Randomly Featured Patents
Client/server system having middleware-based interface between client and server image processing objects
Aromatic sulfone hydroxamic acids and their use as protease inhibitors
Stimuli-responsive polymer devices
Method of producing polarizing plate, and liquid crystal display comprising the polarizing plate
Plug-in holder for centering drill bit
Bone-cutting apparatus
Plasma processor coil
Long life, white light emitting electroluminescent phosphor
Electronic deadbolt lock with a leverage handle
Holographic flake pigment