HOST ENCODER FOR HARDWARE-ACCELERATED VIDEO ENCODING

摘要

By controlling decisions for high layers of bitstream syntax for encoded video, a host encoder provides consistent behaviors even when used with accelerator hardware from different vendors across different hardware platforms. For example, the host encoder controls high-level behaviors of encoding and sets values of syntax elements for sequence layer and picture layer of an output bitstream (and possibly other layers such as slice-header layer), while using only a small amount of computational resources. An accelerator that includes the accelerator hardware then controls encoding decisions for lower layers of syntax, in a manner consistent with the values of syntax elements set by the host encoder, setting values of syntax elements for the lower layers of syntax, which allows the accelerator some flexibility in making its encoding decisions.