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
Vaccination with killed but metabolically active (KBMA) protozoans with toll-like receptor agonists
Methods and system for displaying segmented images
Cycloalkylamine substituted isoquinoline and isoquinolinone derivatives
Locking flange
Rechargeable battery including a channel member
Visual physician office systems and methods
  Randomly Featured Patents
Implanting a solar cell substrate using a mask
Three hundred and sixty degree IFF video resynchronizer unit
Fastener for closing and sealing ends of pipes subjected to internal pressure
Vertical alignment polyimide and vertical alignment film compositions for LCD
Cauchy-distribution based coding system and method
Method and apparatus for manufacturing optical resin substrate, method and apparatus for manufacturing liquid crystal display element using it, and liquid crystal display device using it
Method of production of high purity fusible silica
Process for preparation of catalyst composition for ethylene polymerization
Operator interface terminal for use in a harsh environment
Programmable memory device having reduced power consumption upon unselection