Video frame rate compensation through adjustment of vertical blanking

摘要

Aspects of the present disclosure relate to systems and methods configured to adjust the timing of frame scanout in response to fluctuations in the source frame rate of graphics content rendered by a processing unit. In certain implementations, a vertical blanking interval generated during scanout of frames from a frame buffer may be adjusted in response to detected changes in the frame rate at which the source content is generated. In certain implementations, rendered graphics may be streamed over a network for display in real-time on a remote device, and the scanout out of frames may be adjusted in order to better match the rate of compression and streaming to a variable frame rate of the source content.

主权项

1. A method comprising:
rendering a plurality of source frames into a buffer, each said source frame being rendered sequentially into the buffer at a variable frame rate; scanning out a plurality of output frames from the buffer with a scanout unit, each said output frame being scanned out sequentially with a vertical blanking interval at the end of each said output frame; compressing a source frame within each said output frame that is scanned out of the buffer; detecting one or more fluctuations in the variable frame rate; and adjusting a timing of the compressing of one or more of the source frames in response to the one or more fluctuations.