公开(公告)号：US20140247270A1

公开(公告)日：2014-09-04

申请号：US14276190

申请日：2014-05-13

Applicant: Apple Inc.

Inventor： Binu Mathew ,  William C. Athas ,  Nils E. Mattisson

IPC: G09G5/399

CPC classification number: G09G5/399 ,  G09G5/395

Abstract: The disclosed embodiments provide a system that facilitates driving a display in a computer system. During operation, the system receives an input video stream from a graphics source, wherein the input video stream comprises a sequence of video frames. Next, the system directs the input video stream through a set of two or more memory buffers including a front buffer and a back buffer to produce an output video stream, which is used to drive the display. While directing the input video stream through the set of memory buffers, the system writes a video frame from the input video stream into the back buffer, and concurrently drives the output video stream from a preceding video frame in the front buffer. When the writing of the video frame completes, the system switches buffers so that the back buffer becomes the front buffer, which drives the output video stream, and the front buffer becomes either a spare buffer or the back buffer, which receives a subsequent frame from the input video stream.

Abstract translation: 所公开的实施例提供了有助于驱动计算机系统中的显示器的系统。 在操作期间，系统从图形源接收输入视频流，其中输入视频流包括一系列视频帧。 接下来，系统通过一组包括前缓冲器和后缓冲器的两个或多个存储器缓冲器来引导输入视频流，以产生用于驱动显示器的输出视频流。 在将输入视频流引导通过该组存储器缓冲器的同时，系统将视频帧从输入视频流写入后缓冲器，同时从前缓冲器中的前一视频帧驱动输出视频流。 当视频帧的写入完成时，系统切换缓冲器，使得后缓冲器变为前缓冲器，其驱动输出视频流，并且前缓冲器变为备用缓冲器或后缓冲器，后缓冲器从后缓冲器接收后续帧 输入视频流。

公开(公告)号：US10019971B2

公开(公告)日：2018-07-10

申请号：US14276190

申请日：2014-05-13

Applicant: Apple Inc.

Inventor： Binu Mathew ,  William C. Athas ,  Nils E. Mattisson

IPC: G09G5/399 ,  G09G5/395

CPC classification number: G09G5/399 ,  G09G5/395

Abstract: The disclosed embodiments provide a system that facilitates driving a display in a computer system. During operation, the system receives an input video stream from a graphics source, wherein the input video stream comprises a sequence of video frames. Next, the system directs the input video stream through a set of two or more memory buffers including a front buffer and a back buffer to produce an output video stream, which is used to drive the display. While directing the input video stream through the set of memory buffers, the system writes a video frame from the input video stream into the back buffer, and concurrently drives the output video stream from a preceding video frame in the front buffer. When the writing of the video frame completes, the system switches buffers so that the back buffer becomes the front buffer, which drives the output video stream, and the front buffer becomes either a spare buffer or the back buffer, which receives a subsequent frame from the input video stream.