Sigma LBA-700, LBA-710, LBA-714PC, LBA-300, LBA-712, LBA-708, LBA-500PC, LBA-400 manual Frame Buffer Size

The Full 1x resolution will create an image size equal to the Horizontal Size and Vertical Size shown in the Camera…, Advanced dialog box. This size is the maximum obtainable from the type of analog camera selected.

Digital cameras do not follow the above resolution table. For digital cameras both the Full 1x and 1x resolutions produce image sizes equal to the Horizontal Size and Vertical Size shown in the Camera…, Advanced dialog box. The 2x, 4x,..etc. sizes will reduce the resolution by approximately ½ in both the horizontal and vertical directions, rounding to the nearest even values.

Figure 14

3.2.3.4Frame Buffer Size

The Frame Buffer Size refers to the total amount of memory that is allocated in your system for the temporary storage of digitized frames of video. There are two ways to set the size of the frame buffer. You can enter the amount of memory that you want to allocate to this buffer, or you can specify the number of frames that you want the buffer to contain. We recommend that you set the number of Frames, rather than the Buffer Size. This will allocate just the optimum amount of memory for the set Resolution value.

3.2.3.4.1What is the Frame Buffer?

The Frame Buffer is an allocated block of memory in your PC. It will receive and temporarily retain frames of digitized video data. The frames in the Frame Buffer are numbered from 1 to N, where N is the maximum number of frames that the allocated amount of memory can hold. You must always have at least 1 allocated frame in the frame buffer.

The Frame Buffer is loaded in a sequential round robin fashion. Frames of data can be placed into the frame buffer by:

•Digitizing the video input signal.

•Transferring data from a digital camera.

•Loading in data from disk files.

•Post processing data already in the frame buffer.

•Post processing data coming from a disk file.

In the far lower right hand corner of the Main Screen display is a Frame edit and spin control

. The number showing in the edit control is the number of the frame currently displayed. You can edit this number by double-clicking and typing in a new value, or you can use the spin control to increment or decrement to the frame desired.

We recommend that you set the frame buffer to hold as many frames as your Windows environment has real memory available. This will prevent the LBA-PC application from trying

Operator’s Manual 54 LBA-PC