The Hadamard transform-a tool for index assignment

Hadamard Transform for Speech Wave

A Lossless Version of the Hadamard Transform

| This paper presents a lossless block-transform coder based on the Hadamard transform that achieves a compression ratio as good as that of the current lossless JPEG-standard and about 10 to 20% lower than the currently best state-of-the-art technique Calic. The main advantage of the proposed technique is that it produces an embedded data stream which may be truncated to achieve lossy compressi...

A Generalization of the Hadamard Transform

We consider a generalization of the Hadamard transform that contains 4 freely adjustable parameters and still can use the same efficient computational structure that is used for the fast Hadamard transform. By imposing some relations between the 4 parameters, we will obtain a two-parametric family of unitary transforms that are suitable for use in a feedback delay network (FDN) for artificial r...

Discrete fractional Hadamard transform

Hadamard transform is an important tool in discrete signal processing. In this paper, we define the discrete fractional Hadamard transform which is a generalized one. The development of discrete fractional Hadamard is based upon the same spirit of discrete fractional Fourier transform.

A Method for Flicker Severity Evaluation using the Hadamard Transform

This paper proposes a method to estimate the flicker severity index using the Hadamard transform. A weighting filter in the sequency domain is utilized for direct computation of the flicker index. The proposed method is compared with a flicker meter in the frequency domain that uses the Fast Fourier Transform (FFT). It is seen by numerical simulations that the proposed method yields flicker sev...