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
System, method, and computer program product for determining whether an electronic mail message is compliant with an etiquette policy
Apparatus for counting particles in a gas
HSP20 inhibits amyloidogenesis and neurotoxicity
Three-dimensional holographic display using active shutter
Therapeutic rinse in a self-heating package
Touchscreen with extended conductive pattern
Heteroleptic iridium complexes as dopants
  Randomly Featured Patents
Tunable laser source with monolithically integrated interferometric optical modulator
Process for in-season fertilizer nutrient application based on predicted yield potential
Job processing system, method and program
Error detection and correction method and apparatus in a magnetoresistive random access memory
Device for preloading a torque loaded mechanism on a folding cylinder
Method of fast-forwarding and reversing through digitally stored voice messages
Vacuum processing apparatus
Computer based education for use with multiuser software
Dynamic image composition apparatus and method
Structures that correct for thermal distortion in an optical device formed of thermally dissimilar materials