System and method for efficient multi-bitrate and multi-spatial resolution media encoding

摘要

A system and method for multi-bitrate and multi-spatial resolution media encoding are disclosed. In an embodiment for encoding a sequence of pictures at a given spatial resolution to an encoding format at a plurality of output bitrates, the sequence of pictures and a picture type for each of the pictures are received. Further, best combinations of encoding parameters for each coding tree block (CTB) in each of the pictures are identified from a determined set of combinations of encoding parameters supported by the encoding format for the associated picture type. Furthermore, the sequence of pictures are encoded using the best of the identified combinations of encoding parameters for each CTB in each of the pictures to create media bit streams at the plurality of output bitrates.

主权项

1. A system for encoding a sequence of pictures at a given spatial resolution, with an associated picture type for each picture, to an encoding format at a plurality of output bitrates, comprising:
an intelligent encoding module that receives the sequence of pictures, identifies best combinations of encoding parameters for each coding tree block (CTB) in each of the pictures from a determined set of combinations of encoding parameters supported by the encoding format for the associated picture type, and encodes the pictures in the encoding format based on the best of the identified combinations of encoding parameters for each CTB in each of the pictures to create a media bit stream at one of the plurality of output bitrates; and a set of normative encoding modules, one for each of remaining output bitrates, each of which receives the sequence of pictures, their picture types, and the identified best combinations of encoding parameters for each CTB in each of the pictures and encodes each CTB in the sequence of pictures using one combination of encoding parameters derived using the identified best combinations of encoding parameters for each CTB in each of the pictures to create a media bit stream at respective one of the remaining output bitrates.