Patent ID: 8156535
Filing Date: 2012-04-10
Classification: H04N

Abstract:
1. A signal encoder comprising: a bandpass interpolation filter configured to receive a first stream of digital samples from an analog-to-digital converter and to substantially remove signals outside of a predetermined frequency band between 32 and 38 MHz, the first stream of digital samples being representative of an analog cable television return path signal having a frequency range of between 5 and 42 MHz that is sampled at a first data rate; 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 higher than the first data rate; and puncturing logic configured to puncture the second stream of digital samples and to generate a third stream of digital samples at a third data rate for transmission over a cable television return path, the third data rate being lower than the first data rate.