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
Inhibitors of bacterial nitric oxide synthase, and related screening methods
Use of deuterium oxide for the treatment of virus-based diseases of the respiratory tract
Soybean cultivar BY0811143
Stock analysis method, computer program product, and computer-readable recording medium
Fuel cell module
Intraoral camera for dental chairs
Method and device for operating a vehicle having a hybrid drive
  Randomly Featured Patents
Bulk copper species treatment of thin film photovoltaic cell and manufacturing method
Reflector for use in an artificial lighting device
Semiconductive attachment disc for insulators to reduce electrical stress-induced corrosion
Caulking gun
Starting electrodes for solenoidal electric field discharge lamps
Multi-hierarchy latency measurement in data centers
Aminofulvene derivatives as antiknock compounds
Friction spot joint structure
Knife sharpener
Aminoindazole derivatives as medicaments and pharmaceutical compositions including them