HRTF compression via principal components analysis and vector quantization

HRTF compression via principal components analysis and vector quantization

The computation burden and the huge memory size of the head-related transfer function (HRTF) database challenge the practical application of 3D sound system. This paper therefore proposes a novel method which employs principal components analysis and vector quantization jointly to reduce the size of HRTF set in 3D sound system. Numerical experiment results demonstrate that the proposed method c...

Vector Quantization for Image Compression-Concept Quantization

Vector Quantization Based Image Compression

An image compression method combining discrete wavelet transform (DWT) and vector quantization (VQ) is presented. First, a three-level DWT is performed on the original image resulting in ten separate sub bands. These sub bands are then vector quantized. VQ indices are Huffman coded to increase the compression ratio. Lloyd extended scalar quantization technique is used to design memory less vect...

Video Compression using Vector Quantization

This report presents some results and findings of our work on very-lowbit-rate video compression systems using vector quantization (VQ). We have identified multiscale segmentation and variable-rate coding as two important concepts whose effective use can lead to superior compression performance. Two VQ algorithms that attempt to use these two aspects are presented: one based on residual vector ...

Skew Detection via Principal Components Analysis

Skew detection via principal components is proposed as an e ective method for images which contain other parts than text It is shown that the negative of the image leads to much more robust results and that the computation time involved is still practical This method is also shown to be e ective for single word skew detection