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 of motion correction in optical coherence tomography imaging
Method, device and computer readable medium for determining whether transmission signals are present in received signals
Systems and methods for providing television signals using a network interface device
Power supply input voltage detection circuit
Charging seat having cleaning member
DMAPN having a low DGN content and a process for preparing DMAPA having a low DGN content
Calendar integration methods and systems for presentation of events having combined activity and location information
  Randomly Featured Patents
Writing instrument
Method and apparatus for assigning network addresses based on connection authentication
Process for side lobe suppression and amplitude or phase monopulse radar device
Arresting device of pliers
Cine-video film transport apparatus
Apparatus for manual sharpening of the blades of cutting tools
1-(4-Butylphenyl)-1-(3,4-methylenedioxyphenyl)-2-nitroalkanes and synergistic insecticidal mixtures therewith
Training device
Cross handle