Merging VCube Uživatelský manuál stáhnout pdf (Strana 196)

Appendices : Video Formats and Bandwidth

Page 196

Number of Pixels:

The number of pixels is only a part of the equation leading to the bandwidth, storage and streaming requirements

computation. But since it's a two dimensional value, we must use it as the starting point of the computations.

SD Video Standards

The world is divided in two zones. One using the PAL system and one using the NTSC system. The SECAM system is

almost dead for production equipment and is only used in some countries for broadcasting purpose only.

NTSC is a 720 points x 480 lines format at 29.97 frames per second.

PAL is a 720 points x 576 lines format at 25 frames par second.

Despite a greater number of elements per frame in the PAL system, it uses almost the same bandwidth as the

NTSC system because of its lower frame rate. PAL transmits 10,368,000 points per second and NTSC transmits

10,487,102 points every second.

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