Speech Development by Imitation

The Double Cone Model (DCM) is a model of how the brain transforms sensory input to motor commands through successive stages of data compression and expansion. We have tested a subset of the DCM on speech recognition, production and imitation. The experiments show that the DCM is a good candidate for an artificial speech processing system that can develop autonomously. We show that the DCM can learn a repertoire of speech sounds by listening to speech input. It is also able to link the individual elements of speech to sequences that can be recognized or reproduced, thus allowing the system to imitate spoken language

NewWave: A hardware implementation of wavelet decompression of digital video images

New Wave is a hardware implementation of real time digital video decompression. The algorithm used is a wavelet transform coding which is a lossy algorithm that achieves very high compression factors with low degradation of the video image. The New Wave chip is capable of decompressing 25 video frames per second. Each frame consists of 512 \Theta 512 pixels in 256 shades of gray. The solution could easily be generalized to colour images. CONTENTS 1 Contents 1 Introduction 2 1.1 The MPEG standard : : : : : : : : : : : : : : : : : : : : : : : : : 2 1.1.1 The JPEG algorithm : : : : : : : : : : : : : : : : : : : : : 2 1.1.2 Disadvantages of the JPEG/MPEG algorithm : : : : : : : 3 2 The Wavelet algorithm 3 2.1 The two dimensional wavelet transform : : : : : : : : : : : : : : 7 2.2 The encoding : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 8 2.3 Reconstruction : : : : : : : : : : : : : : : : : : : : : : : : : : : : 8 3 A Wavelet vs JPEG comparison 9 4 Implementation 11 4...