Vector valued sigma delta modulators for color image applications

A vector valued /spl Sigma//spl Delta/ modulator is proposed for multi-input signal applications, such as color imaging. Traditional /spl Sigma//spl Delta/ modulators can be modeled with a vector quantizer in 1-D signal space. The proposed /spl Sigma//spl Delta/ modulator extends this concept to M-D vector space. An optimal noise shaping filter for the oversampled vector-valued /spl Sigma//spl Delta/ modulator is considered. Simulation results verified the improvement provided by the proposed modulator.