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
Tire repair device containing tire cement
Micro-fluid ejection devices with a polymeric layer having an embedded conductive material
Non-volatile memory devices including vertical NAND channels and methods of forming the same
Toy ball
EvalBinding extension
Oil supply system for an internal combustion engine
Control system for electric motor applied to cyclic loads and control method for electric motor applied to cyclic loads
  Randomly Featured Patents
Inspecting OCR characters by displaying adjacent character images
Process for the mechanical roughening of the surface of a printing plate substrate
Numering cam for printing machines
Thermo-transfer sheet and label and manufacturing method of the same
Foundation and a method for forming a mono pile foundation
Stable metal pigment compositions employing methylchloroform as solvent
Coin checking device for a vending machine
Computer architecture capable of concurrent issuance and execution of general purpose multiple instructions
Noninvasive biomagnesonic method of biocurrent measurement
Squirrel-proof selective bird feeder