Pulse code modulation dc centering vestigial sideband converter

Application Number: 00126037
Application Date: 2000.08.24
Publication Number: 1285688
Publication Date: 2001.02.28
Priority Information: 1999/8/24 US 09/382232
International: H04N7/015;H04L27/04
Applicant(s) Name: Thomson Licensing Corp.
Address:
Inventor(s) Name: D.L. Menili
Patent Agency Code: 72001
Patent Agent: wang yong
Abstract A digital VSB modulator (200) includes a modulator to which an ongoing sampled data stream of 1-sample-per-symbol successive PCM symbol signal samples are applied as a modulating signal. A sampled carrier stream (302), occurring at the rate of the signal samples, is applied as a carrier input to the modulator (300-s). The carrier stream is composed of, for example, a repeated 4-sample-sequence of 1, -1, -1, 1 sample values. The output of the modulator (300-s) is applied to a bifurcated multiplexed N-tap root Nyquist FIR filter (306), which produces a VSB bifurcated complex output signal having a DC-centered real (+/-R) sampled data output stream of 1-sample-per-symbol sample values and a DC-centered imaginary (+/-I) sampled data output stream of 1-sample-per-symbol sample values.