Visible to Intel only — GUID: itl1476185375192
Ixiasoft
Visible to Intel only — GUID: itl1476185375192
Ixiasoft
15.7. Motion Adaptive Mode Bandwidth Requirements
- Image data:
For every pair of output lines produced there are two phases:
Phase 1: Read 2 lines = 1920 × 10 bits x 2 (YCbCr) × 2 = 76,800 bits per input line
Phase 2: Write 1 line, Read 1 line, = 1920 × 10 bits × 2 × 2 = 76,800 bits per input line
Phase 1 + phase 2 accesses = 153,600 bits of image data per input line
153600 × 540 lines = 82,944,000 bits per output frame
82944000 × 60 frames per second = 4,976,640,000 = 4.977 GBps of image data read/written
- Motion data:
Motion data is always 8 bits per pixel regardless of color space.
Read & Write motion = 1920 × 8 bits × 2 (one read and one write) = 30,720 bits per input line
30,720 × 540 lines = 16,588,800 bits per output frame
16,588,800 × 60 frames per second = 995,328,000 = 0.995 GBps of motion data written/read
- Video-over-film data:
Motion data is always 24 bits per pixel regardless of color space.
1920 × 24 bits × 2 (one read and one write per pixel) = 92,160 bits per input line
92,160 × 540 lines = 49,766,400 bits per output frame
49,766,400 × 60 frames per second = 2,985,984,000 = 2.985 GBps of video over film data written/read
Total bandwidth (without video over film cadence detection) = 4.977 + 0.995 = 5.972 GBps
Total bandwidth (with video over film cadence detection) = 5.972 + 2.985 = 8.957 GBps