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The Delta-Sigma Digital-to-Analog Converter ( Δ - Σ) is designed in Verilog HDL for stereo video system. This DAC supports 16-bit or 18-bit input data and includes an 8x digital interpolation filter followed by a 64x oversampled delta-sigma modulator. The modulator output controls the reference voltage input to analog low-pass filter. The architecture allows for adjustment of sample rate by changing...
A rotation, scaling and cropping invariant watermarking scheme using image normalization is proposed in this paper. Watermark is adaptively embedded in discrete wavelet transform. Robust image feature points against rotation, scaling, noise and JPEG compression are obtained by the affine invariant Harris feature point detector and used to make the Delaunay triangle to estimate the affine transform...
This paper study a kind of design method about the digital decimation filter design for delta-Sigma ADC with high performance and validated it by simulation using MATLAB tool. A 16-bit digital decimation filter design for stereo audio delta-sigma ADC has been developed. A two-stage decimation filter architecture which can reduce digital switching noise was also introduced in this design. A merged...
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