Patents Assigned to Rich-Tech HK Limited
  • Patent number: 7098816
    Abstract: A delta modulation method and system is provided for processing signals in a digital communications system. The method quantizes an input signal using a tri-state quantizer into a quantized value selected from a set of three different quantized values including a low value, a middle value, and a high value. The selection of the quantized value is based on a comparison between the input signal and a predicted signal of a corresponding sampling period. The method generates from the quantized value an output signal representative of the input signal, determines a predicted signal of the next sampling period, and then feeds the predicted signal of next sampling period back to the tri-state quantizer.
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: August 29, 2006
    Assignee: Rich-Tech HK Limited
    Inventors: Yu Chau Ng, Cheuk Wai Mok
  • Publication number: 20050275574
    Abstract: A delta modulation method and system is provided for processing signals in a digital communications system. The method quantizes an input signal using a tri-state quantizer into a quantized value selected from a set of three different quantized values including a low value, a middle value, and a high value. The selection of the quantized value is based on a comparison between the input signal and a predicted signal of a corresponding sampling period. The method generates from the quantized value an output signal representative of the input signal, determines a predicted signal of the next sampling period, and then feeds the predicted signal of next sampling period back to the tri-state quantizer.
    Type: Application
    Filed: May 23, 2005
    Publication date: December 15, 2005
    Applicant: RICH-TECH HK LIMITED
    Inventors: Yu Chau Ng, Cheuk Wai Mok