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
Method and system for dynamic digital rights bundling
Method and apparatus for re-routing calls in a packet network during failures
Mesa-shaped piezoelectric resonator element
Determining ill conditioning in square linear system of equations
Photoacoustic joulemeter utilizing beam deflection technique
Method and system for Bluetooth low power link layer connection setup
  Randomly Featured Patents
Rock bit lubrication system utilizing expellable plug for obtaining expansion space
Method of use and apparatus for a hydraulic tensioning device for inflatable packer element
Automatic exposure control circuit for a single lens reflex camera of TTL light measuring type
Radar system method using virtual interferometry
Method and apparatus for forming a finned heat exchanger tube that includes an internal fin structure that is a spring formed from a spiral wire wound around a mandrel
Hybrid human leukocyte interferons
Method and apparatus for distinguishing between deployment events and non-deployment events in an SIR system
Chitosan-glucan complex, method for its production and end uses
Shot or sand blasting machine
Easily stored pillow and blanket and method