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
Semiconductor device including a clock generating circuit for generating an internal signal having a coarse delay line, a fine delay line and a selector circuit
Parallel active optical cable
Handheld electronic device with text disambiguation employing advanced editing feature
Method and apparatus for modeling computer program behaviour for behavioural detection of malicious program
Auto-aligning spectroscopy system
Food safety printer
  Randomly Featured Patents
Ink jet recording method and apparatus for recovering ejection at a particular orifice by ejecting ink from adjacent orifices
Software business platform with networked, association-based business entity access management
Method for demineralizing condensate
Excavator tooth retaining assembly
Device for separation of a liquid medium containing constituents which are separable in a filter
Method, system, and apparatus for providing generic database services within an extensible firmware interface environment
Piezoelectric-driven MEMS element
Multilayer semiconductor device
T-helper cell type 17 lineage-specific adjuvants, compositions and methods
Control panel for a construction machine