Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Substrate processing apparatus and display method of substrate processing apparatus
Integrated testing circuitry for high-frequency receiver integrated circuits
Non-intrusive processor tracing
Method and system for facilitating micropayments in a financial transaction system
Sign language keyboard and sign language searching apparatus using the same
Method and apparatus for communication
Wavelength and power scalable waveguiding-based infrared laser system
  Randomly Featured Patents
Boat propeller guard
Faucet spout
Multi-phase transformer
Delay locked loop device
Electric retarders for vehicles
Predictable repeater routing in an integrated circuit design
Compounds used as dyes comperable to Alexa Fluor 350 dyes
Airbag module
Footwear
Device for securing winding bars in slots of electric machines, especially turbo-generators