Relations between Haar and Walsh/Hadamard transforms
B.J. Fino · Proceedings of the IEEE · 1972
Relations between the Haar and Walsh/Hadamard (W/H) transforms, which are proved, show that for some applications the Haar transform performs as well as, and faster than, the W/H transform. These relations yield a family of orthogonal transforms including the Haar and W/H transforms with a common fast algorithm.