Transform vector quantization: application and improvement

Herbert Plansky

doi:10.1117/12.139091

12 January 1993 Transform vector quantization: application and improvement

Herbert Plansky

Proceedings Volume 1771, Applications of Digital Image Processing XV; (1993) https://doi.org/10.1117/12.139091
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

This article presents a coding scheme using variable block-size transform coding together with vector quantization (VQ) called VBSTVQ (variable block-size transform vector quantization). The VBSTVQ shows a satisfying picture quality at bitrates of about 0.3-0.6 bit/pel (coding of the luminance signal only). The coding scheme is well suited for multimedia, computer and distribution applications due to its asymmetry in complexity and its inherent hierarchical structure. The picture is segmented into rectangles of different sizes. These rectangles are transformed by a two-dimensional DCT and coded by VQ based on analysis in the spatial and transform domain. A decomposition scheme of the rectangles into vectors which is adapted to non-stationary signals like edges will be introduced. Computer simulations compare the results of constant and variable blocksize TVQ.

Citation Download Citation

Herbert Plansky "Transform vector quantization: application and improvement", Proc. SPIE 1771, Applications of Digital Image Processing XV, (12 January 1993); https://doi.org/10.1117/12.139091

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