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 for the treatment, alleviation of symptoms of, relieving, improving and preventing a cognitive disease, disorder or condition
Systems and methods for building axes, co-axes and paleo-geographic coordinates related to a stratified geological volume
Method and apparatus for interactive distribution of digital content
Electrical terminal
Systems and methods for performing live chat functionality via a mobile device
Magnetic storage apparatus
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
  Randomly Featured Patents
Method and apparatus for data reproduction
Portable security system
Automatic data collection device, method and article
Electronic device, method for configuring reprogrammable logic element, computer-readable medium, computer data signal and image forming apparatus
Magnetic bearing using displacement winding techniques
Hydrolyzed chlorosilicon by-product addition to cement
Retrieving a replica of an electronic document in a computer network
Azo dyestuffs from cyano-amino-benzisothiazoles
Method for maintaining cleanliness of animal water dispensers
Wearable video recorder and monitor system and associated method