Patent ID: 9031128
Filing Date: 2015-05-12
Classification: H04N

Abstract:
1. A method for use in encoding input video data, comprising: determining a relationship between metric values generated from reference video data using a metric function and respective first encoding parameters, and quantities of encoded video data generated by encoding said reference video data using said respective first encoding parameters; using said metric function to generate metric values from said input video data and respective second encoding parameters; selecting at least one of said second encoding parameters on the basis of a desired quantity of encoded video data and said relationship; and under control of at least one of a configured hardware circuit and a configured computer, encoding said input video data using the selected at least one encoding parameter, wherein said metric function is a spatial activity metric function based on a sum of weighted AC discrete cosine transformation coefficients and is of the form, where f(u,v) is a discrete cosine transformation coefficient of a block element with coordinates (u, v), w(u,v) is a weight for said coefficient, and q(u,v) is a quantization parameter for said coefficient.