×

Apparatus and method for data compression using signal-weighted quantizing bit allocation

  • US 5,301,205 A
  • Filed: 01/29/1993
  • Issued: 04/05/1994
  • Est. Priority Date: 01/29/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for compressing a digital input signal to provide a compressed digital output signal, the apparatus comprising:

  • a means for deriving plural spectral coefficients from the digital input signal, and for grouping the spectral coefficients into bands, each band having a band magnitude and a band frequency; and

    an adaptive bit allocation means for adaptively allocating a number of spectrum-dependent quantizing bits among the bands to allocate to each band a number of spectrum-dependent quantizing bits for quantizing each spectral coefficient in the band, the number of spectrum-dependent quantizing bits allocated to each band being determined according to the band magnitude, weighted depending on the band frequency.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×