Verfahren und Vorrichtung zur Leistungsverbesserung einer Vektorquantisierung

摘要

In a method and apparatus for providing high-speed data compressing without sacrificing the quality of data reconstruction each input vector or block of original data is expressed as a combination of a codebook index and an error differential, or as a compressed version of the original block of data, depending on whether the total number of bits needed to express the input vector as a combination of a codebook index and an error differential is less than the total bits needed to send the compressed version of the original block of data. In one embodiment, the flexibility to express video data in a compressed format or as a combination of a codebook index plus an error differential is provided through a video system employing a codebook (11), a scalar quantizer (17,19), and an entropy coder (16,18). <IMAGE>