double buffering

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double buffering

A programming technique that uses two buffers to speed up a computer that can overlap I/O with processing. Data in one buffer are being processed while the next set of data is read into the other one.

In streaming media applications, the data in one buffer is being sent to the sound or graphics card while the other buffer is being filled with more data from the source (Internet, local server, etc.).

When video is displayed on screen, the data in one buffer are being filled while the data in the other are being displayed. Full-motion video is speeded up when the function of moving the data between buffers is implemented in a hardware circuit rather than being performed by software. See video accelerator and buffering.


Double Buffers
Two buffers are commonly used to speed up program execution. Data are processed in one buffer while data are written into or read out of the other.
References in periodicals archive ?
23 // Composite eye-view render target with back buffer
We draw a full screen sprite with alpha blending enabled to composite with the back buffer.
The sample supports having an eye-view render target with a different resolution from the back buffer. A smaller render target can significantly improve performance as it reduces the total number of rays marched.