Digital video decoder that interfaces to and converts a specific type of digital video source, such as Camera Link, CoaXPress, DVI, GigE Vision, LVDS, RS-422, or SDIĬircuitry common to both analog and digital frame grabbers:.Video decoder that converts SD analog video (e.g., NTSC, SECAM, PAL) or HD analog video (e.g., AHD, HD-TVI, HD-CVI) to a digital formatĭigital frame grabbers, which accept and process digital video streams, include these circuits:.Input signal conditioner that buffers the analog video input signal to protect downstream circuitry.To satisfy the technological demands of applications such as radar acquisition, manufacturing and remote guidance, some frame grabbers can capture images at high frame rates, high resolutions, or both.Īnalog frame grabbers, which accept and process analog video signals, include these circuits: Other operations may be performed as well, such as deinterlacing, text or graphics overlay, image transformations (e.g., resizing, rotation, mirroring), and conversion to JPEG or other compressed image formats. For example, some devices capture audio in addition to video, and some devices provide, and concurrently capture frames from multiple video inputs. Modern frame grabbers often are able to perform functions beyond capturing a single video input. Early frame grabbers typically had only enough memory to store a single digitized video frame, whereas many modern frame grabbers can store multiple frames. Other interface methods have emerged since then, with frame grabbers (and in some cases, cameras with built-in frame grabbers) connecting to computers via interfaces such as USB, Ethernet and IEEE 1394 ("FireWire"). Historically, frame grabber expansion cards were the predominant way to interface cameras to PCs.
It is usually employed as a component of a computer vision system, in which video frames are captured in digital form and then displayed, stored, transmitted, analyzed, or combinations of these. A DataPath VisionRGB-E2s expansion card with two frame grabbersĪ frame grabber is an electronic device that captures (i.e., "grabs") individual, digital still frames from an analog video signal or a digital video stream.