Patent ID: 6330369
Filing Date: 2001-12-11
Classification: H04N

Abstract:
A computer-implemented process for compressing a sequence of digital images, comprising:performing compression on at least part of a first image in the sequence of digital images according to a quantization table and a scale factor to provide an amount of compressed data;if the amount of compressed data is greater than a target data rate, adjusting the scale factor such that a smaller amount of compressed data will be obtained by performing compression according to the adjusted scale factor and the quantization table than if the scale factor is not adjusted;if the amount of compressed data is less than the target data rate, adjusting the scale factor such that a larger amount of data will be obtained by performing compression according to the adjusted scale factor and the quantization table than if the scale factor is not adjusted; [and] comparing a magnitude of the scale factor to the magnitude of a limit factor; andlimiting the magnitude of the scale factor according to the comparison.