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
Method and system for distributing load by redirecting traffic
Mono-body defibrillation probe
Performance apparatus, a method of controlling the performance apparatus and a program recording medium
High voltage circuit for electrical stimulation
Method and device for peer arrangement in single substream upload P2P overlay networks
Fabrication method of packaging substrate having through-holed interposer embedded therein
Group of amino substituted benzoyl derivatives and their preparation and their use
  Randomly Featured Patents
Method and system for mapping network data for network database access
Metallic block for detecting force operating on metallic V-belt and system for detection of operating force using the same
Method for the production of mumbaistatin derivatives
Disk drive with primary and secondary actuator drives
Catalyst and process of production of polyethylene
Novel ester derivatives of ether polycarboxylic acids and process for making same
Masking material
Apparatus and method for testing the condition of an antenna monitoring system
Strawberry plant named `DrisStrawThree`
DAC architecture for analog echo cancellation