Resources Contact Us Home
Enhanced time-interleaved A/D conversion using compression

Image Number 14 for United States Patent #7893852.

Compression of signal samples output from a parallel, time-interleaved analog to digital converter (TIADC) for a baseband signal, includes calculating first or higher order differences of consecutive signal samples followed by lossless or lossy encoding of the difference samples to produce compressed samples. Compression of a TIADC output signal with a nonzero center frequency, includes calculating sums or differences of pairs of signal samples separated by an appropriate number of sampling intervals followed by lossless or lossy encoding. The sums or differences of the signal samples have lower magnitudes than the original samples, allowing more efficient compression. Lossy compression alternatives produce compressed data with a fixed bit rate or with a fixed quality in the decompressed samples. Alternatives for lossy compression include attenuating the analog signal before sampling by the TIADC, applying bit shifters or multipliers after sampling to reduce the magnitudes of the signal samples, and lossy encoding.

  Recently Added Patents
Wireless network device including a polarization and spatial diversity antenna system
Novelty headband
System and method for customized prompting
Sealed, waterproof digital electronic camera system and method of fabricating same
Motion compensated overlay
Lid for a container
Circuit for compressing data and a processor employing same
  Randomly Featured Patents
Lever-type connector
Time limited digital oscillator
Selective call receiver having timed power supply
Parallel-acting roller clamp for intravenous administration set
Photographic lens having ghost image prevented from appearing
Methods for improving syngas-to-alcohol catalyst activity and selectivity
Inserting lenses into corneal epithelial pockets to improve vision
Transfer apparatus
Three-state logic circuit for wire-ORing to a data bus
Hydraulic control system for weighting and two-way valve therefor