ATO DTV System Technical Documentation

1. ATO DTV System Technical Documentation ATO HW Team July, 2003

2. Topic of Technical Data • Fundamental functions of DTV System • Color space • Analog Input Signal • Digital data format • Input Input Capture Control • Frame Rate Conversion • Image/Video enhancement • Scalar • De-interlace • OSD • PIP POP • Output Display control

3. Color Space

4. Color space for Color Difference Video Signal • Color difference analog Video are YUV and YPbPr • The common formula show as below:

5. Signal and Color Space • Analog Signal • TV (CVBS), Composite signal (YUV color space) • AV, Composite (YUV color space) • S-video, Y/C signal (YUV color space) • Component, Y/R-Y/B-Y (YUV color • Digital • 480i– SDTV (YUV) • 480p, 720p, 1080i, 1080p---HDTV (Y709CbCr(YPbPr) color space)

6. YUV Color Space 1.YUV color space is used NTSC, PAL, SECAM composite color video system. 2.Y: Luma information, UV: Color information.

7. YPbPr Color Space (for HDTV)

8. Input Signal Type • RGB • DVI • CVBS • YC • Component • SDTV • HDTV

9. Video Signal Evolution

10. RGB • Input Signal level: 1.4Vp-p/2.0Vp-p • Signal level Before ADC: 0.7Vp-p/1.0Vp-p • Impedance is 75 Ohm • Terminator Resister is 75 Ohm • Sync level is 300mV • Sync type: • Composite Sync • Separate Sync

11. DVI • Digital Data • Signal type: Differential signal • Signal level: • Low noise signal • Long distance transmission • Differential impedance: 50 Ohm • Single ending impedance: 100 Ohm

12. CVBS - NTSC • Resolution: • 525 lins, 60 fields per second • Bandwidth • Y bandwidth:0 ~ 4.2 MHz • U or V bandwidth: 1.3MHz • Color carrier freq (Fsc): depend on different NTSC • Audio carrier freq: 4.5MHz • Channel Bandwidth : 6 MHz • Video decoder sampling clock > 6MHz * 2 (using 13.5MHz) • Color space, YUV • NTSC = Y+C = Y +( Usinωt + Vcosωt) + Sync, ω = 2πFsc • Fh, Fv and Fsc

13. CVBS- NTSC Bandwidth

14. CVBS- NTSC Bandwidth

15. CVBS - NTSC

16. CVBS-NTSC Waveform

17. CVBS-NTSC Color Bars

18. Analog Video-CVBS waveform

19. CVBS- NTSC Variations

20. CVBS-PAL Signal • Resolution: • 625 lins, 50 fields per second • Bandwidth • Y bandwidth: depend on different PAL • U or V bandwidth: 1.3MHz • Color carrier freq (Fsc): depend on different PAL • Audio carrier freq: depend on different PAL • Channel Bandwidth : depend on different PAL • Color space, YUV • NTSC = Y+C = Y +( Usinωt + Vcosωt) + Sync, ω = 2πFsc • Fsc

21. CVBS- PAL Waveform

22. CVBS – PAL Color Bar

23. CVBS- PAL Color Bar

24. CVBS- PAL AV IF Freq

25. CVBS – PAL Variations

26. YC Signal-NTSC/PAL • . Why need Y/C signal ? Separate Y and C signal to reduce chroma information on luma And luma information on chroma

27. S-Video Y/C Waveform

28. S-Video Connector

29. Signal for SDTV • Resolution: 480i(720 x 480) • Sync Level: Two-level • Color space: YUV

30. SDTV- Y Waveform

31. SDTV- Color Waveform

32. YCbCr- Waveform

33. YPbPr Signal for HDTV • Signal process different between DTV and NTSC • NTSC, Composite -> YC separate -> R601 or R656 (4:2:2) • DTV, YPbPr -> 8:8:8 • HDTV signal type: • Analog RGB • Analog YPbPr • Digital 4:4:4, 4:2:2 • DVI 8:8:8 ( in the future) • data format Resolution: 1080p, 1080i(1920 x 1080), 720p (1280 x 720), 480p • Sync Level: Tri-level • Color space: ITU-R BT.709

34. HDTV- Y Waveform

35. HDTV – Color Waveform

36. Digital Data Format • RGB(Come from D-sub or DVI connector) • Format 8:8:8, 24 bits(one clk one pixel) or 48 bits ( one clk two pixels) • Data range: 0 ~ 255 • 2 pixel = 6 bytes (48 bits) • Video (come from Composite, S-video and YPbPr for DTV) • 4:4:4 (24 or 48 bit) • 2 pixel = YCbCr + YCbCr= 6 bytes (48 bits) • ITU-R601 4:2:2 (16 bits), sampling rate=13.5MHz • 16 bits data + video clock + H Sync + V Sync • 2 pixel = (Y0 U0) + (Y1 V0)=16 bits + 16 bits = 32 bits • ITU-R656 4:2:2(8 bit), Sampling rate = 27 MHz • 8 bits data + embedded Sync + video clock • 2 pixel = Y0 + U0 + Y1 +V0 = 4 bytes = 32 bits

37. Video Digital Data Format – 4:4:4 vs 4:2:2

38. Video Digital Data format- 4:2:2

39. BT656 Format-1 • Y data normal range: 16 ~ 235 • CbCr data normal range: 16 ~ 240 (128+/-112). • 3. During blanking interval, Y should have a value of 10H • CrCb should have a value of 80H.

40. BT656 Format-2

41. BT656 Format-3

42. ASI510 Function • Input Source muxing. • Data format Conversion • Input Signal Capture • Memory Arrangement • Frame Rate Conversion • De-Interlace • Scalar • Image/Video Enhancement • Color Space Conversion • Display Control ( Signal, PIP, POP, PAP, Digest) • OSD • ICC • Panel Timing Control

45. ADI BLOCK

46. Input Source Muxing • Input MUXing select any two of three port input to Channel X and Y Channel. (Three input port are digital port, Video Port #1 and Video Port #2. • It include data and control sync.

47. Digital Port(RGB, HDTV, DVI) • 1. It is a 8:8:8 data format • 2. It could be 24(single pixel) or 48 bits (Dual Pixel) • 3. If input timing is 1280x1024 (SXGA) 60 Hz (110Mhz) • 24 bits input, pixel clock = 110MHz • 48 bits input, pixel clock = 55 MHz • 4. Dual pixel problem: Miss alignment (not miss first pixel)

48. Video Port A and B • R656 8 bits input for each video A and B. • R601 16 bits input for combination of video A and B.

49. Input Capture Control • 1. Analog RGB and HDTV Input • Find the first pixel( Data Valid), and detect the Sync timing and find H and V total. • FW using these information to capture input picture. • DVI, R656 and R601 input • These format already include sync information, • FW just using these sync information to capture the input picture.

50. Input Capture Control-Input Region