Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Devices having reduced susceptibility to soft-error effects and method for fabrication
Rotatable polarizer/filter device and feed network using the same
Bone augmentation training system
Rotor support system
Method of continuously producing electronic film components
Noise reduction in electronic systems
Mechanical pitch shifter
  Randomly Featured Patents
Lamp reflectors
Radio transmitter having an output power control circuit
Downlink transmit power synchronization during diversity communication with a mobile station
Ignition drive circuit
Apparatus for the continuous mixing of granular materials
Cloning and characterization of a human adenylyl cyclase
Process for stabilizing photographic elements using a solution comprising a water-soluble N-methylol compound and a buffering agent
Keyboard apparatus of electronic musical instrument
Polymer production at supercritical conditions
Solenoid valve