Patent ID: 8406289
Filing Date: 2013-03-26
Classification: H04N

Abstract:
1. A method for selecting a method from a set of methods of transcoding digital video data, the data being transferable between at least two communication apparatuses via a communication network, wherein the set of transcoding methods includes at least two different types of transcoding methods, each type of transcoding method being selected from at least one of a plurality of methods of reducing a spatial resolution by subsampling images of a video sequence by deleting pixels in lines or columns of images of the video sequence, a plurality of re-quantization methods and a plurality of methods of reducing a frame rate, said selection method comprising the following steps: for each transcoding method, obtaining a distortion value from a mathematical model for establishing the distortion taking into account at least said type of transcoding method, the distortion model establishing a relationship between the distortion and the energy of the signal represented by the digital data to be transcoded; and selecting a transcoding method as a function of the different distortion values obtained for the set of transcoding methods.