Resources Contact Us Home
Encoding, decoding and compression of audio-type data using reference coefficients located within a band a coefficients

Image Number 7 for United States Patent #5640486.

An audio type signal is encoded. The signal is first divided into bands. For each band, a yardstick signal element is selected. The yardstick may be the signal element having the largest magnitude in the band, the second largest, closest to the median magnitude, or having some other selected magnitude. This magnitude is used for various purposes, including assigning bits to the different bands, and for establishing reconstruction levels within a band. The magnitude of non yardstick signal elements is also quantized. The encoded signal is also decoded. Apparatus for both encoding and decoding are also disclosed. The location of the yardstick element within its band may also be recorded and encoded, and used for efficiently allocating bits to non-yardstick signal elements. Split bands may be established, such that each split band includes a yardstick signal element and each full band includes a major and a minor yardstick signal element.

  Recently Added Patents
Detection and use of low molecular-weight modulators of the cold-menthol receptor TRPM8
Ion implantation method and ion implantation apparatus
Translucent internal graphics enhancement
Biomarkers of gastric cancer and use thereof
System and method for distributed security
Silicone hydrogel, lens for eye and contact lens
Electronic device and recording medium
  Randomly Featured Patents
Information recording and reproducing apparatus
Nonlinear observer for battery state of charge estimation
Apparatus and methods for multiple unidirectional virtual connections among SAS devices
Interlock and latching systems for a dispensing nozzle
Processing of two noise contaminated, substantially identical signals to improve signal-to-noise ratio
Stabilized solid state gyrolaser without blind region
Slide plate filters for thermoplastic and similar materials
Vaccum operated dry sump system
Copper etching process and solution
Leather stitching for container