Title:
【発明の名称】ケーブルテレビネットワーク性能を向上させるデジタル処理装置
Document Type and Number:
Japanese Patent JP2003526254
Kind Code:
A
Abstract:
Docket: D2459 A system and method for increasing the performance of a digital return path in a hybrid-fiber-coax television system using baseband serial optical transport, receives an analog composite return path waveform at a comparator input to a digital return transmitter that includes an A/D converter and a first nonlinear processor. A first processing function is applied to a signal output from the comparator at the first nonlinear processor and the processed signal is forwarded to the A/D converter which converts the processed signal to generate a quantized output signal of a sequence of digital words whose value represent analog signal samples. The quantized digital signal is output to an output of the digital return transmitter and to a feedback loop including a D/A converter, which converts the quantized digital signal to an analog feedback signal and forwards the analog feedback signal to a second processor. The second processor applies a second processing function to the analog feedback signal and outputs the processed analog feedback signal to the comparator input of the digital return transmitter. The comparator input to the digital return transmitter adds the processed analog feedback signal to the analog composite return path waveform to create the signal output from the comparator.
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Inventors:
Howard, Robert El
Application Number:
JP2001564495A
Publication Date:
September 02, 2003
Filing Date:
February 28, 2001
Export Citation:
Assignee:
GENERAL INSTRUMENT CORPORATION
International Classes:
H04N7/22; H03M3/04; H04B10/155; H04B10/272; H04B14/04; H04N7/173; H04N21/61; (IPC1-7): H04B14/04; H04N7/22
Attorney, Agent or Firm:
Akira Koike (2 outside)