Patent ID: 8295624

Claim:
A system for generating a quality metric prediction table for predicting quality in image transcoding, the system including: a computer, comprising a processor, and a non-transitory computer readable storage medium having computer readable instructions stored thereon for execution by the processor, which cause the processor to: determine an input encoding quality factor for each of a plurality of input images in a set of training images; transcode the plurality of input images into corresponding output images, with corresponding output encoding quality factors and resolution scaling factors; to compute a quality metric for each transcoding of each of the input images, comprising comparing each output image with the corresponding input image, the quality metric being a measure of distortion introduced by said each transcoding; and to store the computed quality metrics in a form of the quality metric prediction table, the quality metric prediction table having storage locations for the computed quality metrics, the storage locations being indexed by input encoding quality factor, output encoding quality factor and resolution scaling factor.