×

Data rate compression device for cable television return path using bandpass puncturing

  • US 20030154495A1
  • Filed: 03/19/2002
  • Published: 08/14/2003
  • Est. Priority Date: 02/12/2002
  • Status: Active Grant
First Claim
Patent Images

1. A signal encoder for use in a cable television return path and configured to receive a first stream of digital samples from an analog-to-digital converter, the first stream of digital samples being representative of an analog return path signal that is sampled at a first data rate, the signal encoder comprising:

  • a bandpass interpolation filter configured to receive the first stream of digital samples and to substantially remove signals outside of a predetermined frequency band;

    up-sampling logic configured to up-sample outputs of the bandpass interpolation filter and to generate a second stream of digital samples at a second data rate, the second data rate being a predetermined integer multiple of a center frequency of the predetermined frequency band;

    puncturing logic configured to puncture the second stream of digital samples at a predetermined odd integer rate and to generate a third stream of digital samples at a third data rate that is lower than the first data rate.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×