NTSC video: Revision history

6 April 2024

• curprev 07:5507:55, 6 April 2024‎ Fiskbit talk contribs‎ 30,545 bytes +32‎ Fixes "Understanding Analog Video Signals" tutorial link. (Maxim Integrated seems to now be at analog.com)

30 March 2024

• curprev 08:4708:47, 30 March 2024‎ Persune talk contribs‎ m 30,513 bytes −19‎ Emulating in C++ code: Declare InColorPhase() lambda before use

29 March 2024

• curprev 05:3805:38, 29 March 2024‎ Persune talk contribs‎ 30,532 bytes −123‎ Emulating in C++ code: change YIQ nomenclature to YUV; add 2x factor to QAM decoding
• curprev 05:2205:22, 29 March 2024‎ Persune talk contribs‎ m 30,655 bytes −36‎ Black/White level variables declared but not used in NTSCsignal()?

3 March 2024

• curprev 06:5006:50, 3 March 2024‎ Persune talk contribs‎ m 30,691 bytes +155‎ Fix IQ-UV matrix rotation and add citation

29 February 2024

• curprev 15:1015:10, 29 February 2024‎ Persune talk contribs‎ 30,536 bytes +2‎ Fix equation for G in YUV to RGB matrix
• curprev 05:5505:55, 29 February 2024‎ Persune talk contribs‎ 30,534 bytes +28‎ Fix all matrix equations of YUV using new reduction factors
• curprev 05:2405:24, 29 February 2024‎ Persune talk contribs‎ m 30,506 bytes +63‎ Fix link for SMPTE EG 27-2004
• curprev 05:1905:19, 29 February 2024‎ Persune talk contribs‎ m 30,443 bytes −54‎ Undo revision 21635 by Persune (talk) Tag: Undo
• curprev 05:1805:18, 29 February 2024‎ Persune talk contribs‎ m 30,497 bytes +54‎ Fix source for reference in composite decoding

28 February 2024

• curprev 04:3204:32, 28 February 2024‎ Persune talk contribs‎ m 30,443 bytes +6‎ Fix errors in C++ signal generation

10 February 2024

• curprev 23:1923:19, 10 February 2024‎ Persune talk contribs‎ m 30,437 bytes +12‎ Use more precise color-difference reduction factors

7 January 2024

• curprev 07:0307:03, 7 January 2024‎ Persune talk contribs‎ 30,425 bytes −1,179‎ Remove references to old voltage measurements

26 July 2023

• curprev 09:4809:48, 26 July 2023‎ Rainwarrior talk contribs‎ 31,604 bytes −42‎ →‎Emulating in C++ code: refer to first and second images rather than left and right (to cover case of wrap)
• curprev 08:2308:23, 26 July 2023‎ Rainwarrior talk contribs‎ 31,646 bytes +9‎ →‎Emulating in C++ code: use flexible rows instead of tables so a narrower browser is allowed to wrap these huge images instead of forced to make a horizontal scrolling view to accomodate

20 July 2023

• curprev 20:1320:13, 20 July 2023‎ NewRisingSun talk contribs‎ 31,637 bytes +53‎ Use a better explantion from PinoBatch

19 July 2023

• curprev 18:2018:20, 19 July 2023‎ Persune talk contribs‎ 31,584 bytes +194‎ Detail saturation loss compensation in composite video decoding

19 May 2023

• curprev 06:3206:32, 19 May 2023‎ Persune talk contribs‎ 31,390 bytes +712‎ Update composite decoding terminology; hint at colorimetry details

23 April 2023

• curprev 07:5307:53, 23 April 2023‎ Fiskbit talk contribs‎ m 30,678 bytes −2‎ Replaces 'colour' with 'color' for consistency and searchability.
• curprev 05:1905:19, 23 April 2023‎ Lidnariq talk contribs‎ 30,680 bytes +15‎ →‎Brightness Levels: shoulda previewed not just looked at changes
• curprev 05:0905:09, 23 April 2023‎ Lidnariq talk contribs‎ 30,665 bytes +326‎ →‎Brightness Levels: Link to PPU palette for cross-reference-ability. Don't compare to PAL here.
• curprev 05:0105:01, 23 April 2023‎ Lidnariq talk contribs‎ 30,339 bytes −33‎ Move clock out of introduction, where it's not yet relevant, and into first section where timing matters.
• curprev 04:5404:54, 23 April 2023‎ Lidnariq talk contribs‎ 30,372 bytes +10‎ →‎Color Tint Bits: Don't use register numbers
• curprev 04:5304:53, 23 April 2023‎ Lidnariq talk contribs‎ 30,362 bytes −193‎ →‎Color Phases: clarify what "row Y" means. Link to wikipedia for color -U. Delete incorrect commentary about PAL - it should be on that page anyway.
• curprev 04:4304:43, 23 April 2023‎ Lidnariq talk contribs‎ m 30,555 bytes −1‎ →‎Color Artifacts: typo

12 April 2023

• curprev 22:5022:50, 12 April 2023‎ Lidnariq talk contribs‎ 30,556 bytes −93‎ →‎Scanline Timing: use "backdrop" instead of the confusing "background color". But just to be careful, link to the glossary the first time we use the term
• curprev 07:0907:09, 12 April 2023‎ Persune talk contribs‎ 30,649 bytes +445‎ Cite timing sources
• curprev 04:5904:59, 12 April 2023‎ Persune talk contribs‎ 30,204 bytes +93‎ Indicate where VBlank is set and cleared
• curprev 04:3704:37, 12 April 2023‎ Persune talk contribs‎ m 30,111 bytes +516‎ Use colored squares instead of names

11 April 2023

• curprev 20:1920:19, 11 April 2023‎ Persune talk contribs‎ 29,595 bytes +1,139‎ Reposition start times of scanline timings, use more accurate terms for components of composite video

8 April 2023

• curprev 07:0707:07, 8 April 2023‎ Rainwarrior talk contribs‎ 28,456 bytes +190‎ →‎Color Artifacts: linking a good forum thread as reference
• curprev 06:4006:40, 8 April 2023‎ Rainwarrior talk contribs‎ 28,266 bytes +2,463‎ →‎Color Phases: describe the colour artifacts

1 April 2023

• curprev 01:0701:07, 1 April 2023‎ Rainwarrior talk contribs‎ 25,803 bytes −139‎ →‎Color Phases: "black strokes on a white background" effect seems to be disputed, moving it to talk temporarily
• curprev 00:2300:23, 1 April 2023‎ Rainwarrior talk contribs‎ 25,942 bytes +589‎ →‎Color Phases: reorder the description of differential phase distortion to try and put the output effects first, and the technical explanation later. also moving the forum thread link into a direct article reference, rather than being hidden in an edit comment.

31 March 2023

• curprev 02:4402:44, 31 March 2023‎ Tepples talk contribs‎ 25,353 bytes +612‎ →‎Color Phases: Differential phase distortion - see https://forums.nesdev.org/viewtopic.php?p=287241#p287241 for background

27 March 2023

• curprev 20:4920:49, 27 March 2023‎ Rainwarrior talk contribs‎ 24,741 bytes +61‎ →‎Color Tint Bits: add phase diagrams to the table, consistent use of term "active"
• curprev 20:4220:42, 27 March 2023‎ Rainwarrior talk contribs‎ 24,680 bytes +65‎ →‎Emulating in C++ code: explain that this is based on "old" measurements
• curprev 20:4120:41, 27 March 2023‎ Rainwarrior talk contribs‎ m 24,615 bytes −16‎ →‎Color Tint Bits: formatting
• curprev 20:4020:40, 27 March 2023‎ Rainwarrior talk contribs‎ 24,631 bytes +221‎ →‎Color Tint Bits: explain that the terminated measurement gives a factor of 0.81 on the absolute voltage, and the other figures are an approximation for the old measurement
• curprev 20:3420:34, 27 March 2023‎ Rainwarrior talk contribs‎ 24,410 bytes +199‎ →‎Brightness Levels: Moving "Initial Measurement" below the more recent "Terminated Measurement" and explaining that it's probably out of date and of unknown provenance
• curprev 05:1605:16, 27 March 2023‎ Rainwarrior talk contribs‎ m 24,211 bytes −10‎ →‎Libraries: protocol-relative forum links

26 March 2023

• curprev 22:2622:26, 26 March 2023‎ Rainwarrior talk contribs‎ 24,221 bytes +17‎ →‎Emulating in C++ code: fix broken link to Bisqwit's code example

12 March 2023

• curprev 18:5218:52, 12 March 2023‎ Lidnariq talk contribs‎ 24,204 bytes −40‎ →‎Scanline Timing: "NTSC alternates between 262/263 scanlines" is horrifically misleading: don't say that. Don't mention other 240p consoles, this is the NESdevwiki. Do mention that the NES produces a non-standard number of chroma periods per scanline.

9 March 2023

• curprev 08:2108:21, 9 March 2023‎ Persune talk contribs‎ m 24,244 bytes +2‎ Refer to both matrices instead of the original single matrix
• curprev 08:2008:20, 9 March 2023‎ Persune talk contribs‎ 24,242 bytes +280‎ Add YUV to linear RGB conversion matrix in terms of YUV only
• curprev 08:0708:07, 9 March 2023‎ Persune talk contribs‎ m 23,962 bytes 0‎ Correct swapped color reduction factors

8 March 2023

• curprev 18:3118:31, 8 March 2023‎ Persune talk contribs‎ 23,962 bytes +201‎ Clarify IQ to UV rotation matrix (thanks to NewRisingSun for clarifications)
• curprev 17:0617:06, 8 March 2023‎ Persune talk contribs‎ 23,761 bytes +964‎ Reword composite decoding summary (thanks to NewRisingSun for clarifications)
• curprev 10:2610:26, 8 March 2023‎ Persune talk contribs‎ m 22,797 bytes +107‎ Add link to FCC-sanctioned YIQ to RGB conversion base equations
• curprev 10:1910:19, 8 March 2023‎ Persune talk contribs‎ 22,690 bytes +3,241‎ Add section for composite video decoding

27 February 2023

• curprev 11:0611:06, 27 February 2023‎ Persune talk contribs‎ 19,449 bytes −210‎ Plot example waveform via PPUPlayer's video signal dump

26 February 2023

• curprev 19:4519:45, 26 February 2023‎ Persune talk contribs‎ 19,659 bytes +9‎ Animate "ragged" NTSC demodulation illustration

30 January 2023

• curprev 02:1602:16, 30 January 2023‎ Lidnariq talk contribs‎ 19,650 bytes +74‎ →‎Libraries: add one

9 April 2020

• curprev 16:3116:31, 9 April 2020‎ Quietust talk contribs‎ 19,576 bytes +118‎ →‎Scanline Timing: add an image to better visualize the scanline timing tables
• curprev 14:0014:00, 9 April 2020‎ Quietust talk contribs‎ 19,458 bytes +83‎ merge and reword some awkwardly-short sentences

6 April 2020

• curprev 16:5616:56, 6 April 2020‎ Tepples talk contribs‎ 19,375 bytes +55‎ →‎Scanline Timing: Deetle aka substrate in Discord complained that "late" implies nonstandard. It was supposed to mean half a scanline later than hsync.
• curprev 16:5316:53, 6 April 2020‎ Tepples talk contribs‎ 19,320 bytes +139‎ →‎Scanline Timing: Better separate standard and nonstandard discussion in this paragraph

17 August 2019

• curprev 06:1806:18, 17 August 2019‎ Rainwarrior talk contribs‎ 19,181 bytes +19‎ →‎See also: PPU palettes is very relevant

15 August 2019

• curprev 01:2601:26, 15 August 2019‎ Koitsu talk contribs‎ 19,162 bytes +28‎ No edit summary

16 December 2018

• curprev 20:2520:25, 16 December 2018‎ Rainwarrior talk contribs‎ 19,134 bytes +37‎ →‎Color Tint Bits: Emphasis affects the whole $D column, not just $1D. Also simplifying by stating just the columns instead of a big jumble of hex values.

30 August 2018

• curprev 18:4018:40, 30 August 2018‎ Lidnariq talk contribs‎ m 19,097 bytes 0‎ →‎Initial measurement: there's no way those units were supposed to be µV

6 April 2017

• curprev 18:4818:48, 6 April 2017‎ Rainwarrior talk contribs‎ 19,097 bytes +174‎ →‎Scanline Timing: should really mention Overscan in here somewhere

15 February 2017

• curprev 00:2500:25, 15 February 2017‎ Tepples talk contribs‎ 18,923 bytes +133‎ →‎Color Tint Bits: 6, 10, or 12

16 December 2016

• curprev 00:1800:18, 16 December 2016‎ Rainwarrior talk contribs‎ 18,790 bytes −169‎ changing "interactive demo" into "libraries", removed nes_ntsc_palette.c link because it does not seem to exist

14 December 2016

• curprev 07:3807:38, 14 December 2016‎ Rainwarrior talk contribs‎ 18,959 bytes +140‎ →‎References: linking Bisqwit's integer NTSC decoder

24 November 2016

• curprev 18:2518:25, 24 November 2016‎ Lidnariq talk contribs‎ m 18,819 bytes +62‎ →‎Terminated measurement: US NTSC and Japanese NTSC difference

18 June 2016

• curprev 20:1620:16, 18 June 2016‎ Tepples talk contribs‎ 18,757 bytes +491‎ See also PAL video
• curprev 20:1220:12, 18 June 2016‎ Tepples talk contribs‎ 18,266 bytes +100‎ →‎Interactive Demo: Bisqwit's NTSC decoder

11 May 2016

• curprev 02:2102:21, 11 May 2016‎ Koitsu talk contribs‎ 18,166 bytes +12‎ →‎Interactive Demo: Update outdated links; http://forums.nesdev.com/viewtopic.php?f=3&t=14207 brought this to our attention

15 December 2015

• curprev 16:2816:28, 15 December 2015‎ Tepples talk contribs‎ 18,154 bytes +1,009‎ →‎Scanline Timing: Link to external 240p page per request at http://forums.nesdev.com/viewtopic.php?p=160690#p160690

14 December 2015

• curprev 20:1820:18, 14 December 2015‎ Tepples talk contribs‎ 17,145 bytes +207‎ →‎Color Tint Bits: Confirmed: xE and xF unaffected

17 November 2015

• curprev 05:1705:17, 17 November 2015‎ Tepples talk contribs‎ m 16,938 bytes +63‎ →‎Brightness Levels: move measurement data to be independent of grayscale logic data
• curprev 05:1505:15, 17 November 2015‎ Tepples talk contribs‎ 16,875 bytes +824‎ →‎Brightness Levels: measurements by lidnariq

5 November 2015

• curprev 22:5522:55, 5 November 2015‎ Tepples talk contribs‎ 16,051 bytes +40‎ →‎Brightness Levels: relate these levels to the apparently 2 Vp-p levels above; fix Colorburst L typo

2 November 2015

• curprev 21:4921:49, 2 November 2015‎ Tepples talk contribs‎ m 16,011 bytes +33‎ added references list for Cite.php
• curprev 15:2315:23, 2 November 2015‎ Tepples talk contribs‎ 15,978 bytes +795‎ →‎Brightness Levels: Prepare for future translation into IRE once someone re-measures the signal with the correct output impedance

12 October 2015

• curprev 20:5120:51, 12 October 2015‎ Lidnariq talk contribs‎ 15,183 bytes 0‎ →‎Color Phases: h/t HardWareMan

12 December 2014

• curprev 16:2116:21, 12 December 2014‎ Lameboyadvance talk contribs‎ 15,183 bytes +25‎ reverted scanline start times
• curprev 15:4915:49, 12 December 2014‎ Lameboyadvance talk contribs‎ 15,158 bytes +220‎ cleaned up scanline tables

10 September 2014

• curprev 05:3705:37, 10 September 2014‎ Lidnariq talk contribs‎ m 14,938 bytes +74‎ →‎Color Tint Bits: PAL-vs-NTSC difference warrants a mention

14 August 2014

• curprev 03:0803:08, 14 August 2014‎ Rainwarrior talk contribs‎ m 14,864 bytes −4‎ Undo revision 8945 by Rainwarrior (talk) not sure about terminology anymore
• curprev 02:5402:54, 14 August 2014‎ Rainwarrior talk contribs‎ m 14,868 bytes +4‎ →‎Emulating in C++ code: C++11

21 May 2014

• curprev 23:0623:06, 21 May 2014‎ Bisqwit talk contribs‎ 14,864 bytes +125‎ →‎Scanline Timing: on what happens when render-enable bits are changed
• curprev 21:2721:27, 21 May 2014‎ Bisqwit talk contribs‎ m 14,739 bytes +19‎ →‎Scanline Timing
• curprev 21:2621:26, 21 May 2014‎ Bisqwit talk contribs‎ m 14,720 bytes +1‎ →‎Scanline Timing
• curprev 21:2521:25, 21 May 2014‎ Bisqwit talk contribs‎ m 14,719 bytes −10‎ →‎Scanline Timing: remove leftover header
• curprev 21:2521:25, 21 May 2014‎ Bisqwit talk contribs‎ 14,729 bytes −329‎ →‎Scanline Timing: I had an error in the prerendering scanlines. And there are two bottom margin lines.

12 May 2014

• curprev 14:4614:46, 12 May 2014‎ Quietust talk contribs‎ 15,058 bytes −38‎ pretty sure this is a typo

11 May 2014

• curprev 18:4218:42, 11 May 2014‎ Bisqwit talk contribs‎ m 15,096 bytes −228‎ →‎Scanline Timing
• curprev 18:3818:38, 11 May 2014‎ Bisqwit talk contribs‎ m 15,324 bytes +115‎ →‎Scanline Timing
• curprev 18:3718:37, 11 May 2014‎ Bisqwit talk contribs‎ m 15,209 bytes +37‎ →‎Scanline Timing
• curprev 18:3618:36, 11 May 2014‎ Bisqwit talk contribs‎ 15,172 bytes +1,179‎ →‎Scanline Timing: Maybe it is clearer if I separate these tables.
• curprev 18:2318:23, 11 May 2014‎ Bisqwit talk contribs‎ m 13,993 bytes +14‎ →‎Scanline Timing
• curprev 18:2118:21, 11 May 2014‎ Bisqwit talk contribs‎ m 13,979 bytes 0‎ No edit summary
• curprev 18:1418:14, 11 May 2014‎ Bisqwit talk contribs‎ m 13,979 bytes 0‎ →‎Scanline Timing
• curprev 18:1218:12, 11 May 2014‎ Bisqwit talk contribs‎ m 13,979 bytes +45‎ No edit summary
• curprev 18:0918:09, 11 May 2014‎ Bisqwit talk contribs‎ m 13,934 bytes −19‎ No edit summary
• curprev 18:0518:05, 11 May 2014‎ Bisqwit talk contribs‎ 13,953 bytes +75‎ No edit summary
• curprev 17:5917:59, 11 May 2014‎ Bisqwit talk contribs‎ 13,878 bytes +596‎ Added the signals for non-rendering lines

24 August 2013

• curprev 07:2107:21, 24 August 2013‎ Koitsu talk contribs‎ 13,282 bytes +5‎ No edit summary

16 May 2013

• curprev 17:2217:22, 16 May 2013‎ Quietust talk contribs‎ 13,277 bytes +92‎ →‎Scanline Timing: add timing offsets

17 January 2013

• curprev 08:4908:49, 17 January 2013‎ Bisqwit talk contribs‎ 13,185 bytes +149‎ Make the C++ code a bit more intuitive

31 October 2012

• curprev 15:4315:43, 31 October 2012‎ Lidnariq talk contribs‎ m 13,036 bytes +416‎ Add a few comments about PAL video generation instead; it doesn't *quite* belong here but it doesn't belong anywhere else

9 November 2011

• curprev 14:4114:41, 9 November 2011‎ Bisqwit talk contribs‎ 12,620 bytes +423‎ note on the nature of the test card
• curprev 14:3714:37, 9 November 2011‎ Bisqwit talk contribs‎ 12,197 bytes +408‎ +grayscale
• curprev 13:3313:33, 9 November 2011‎ Bisqwit talk contribs‎ m 11,789 bytes +62‎ align left
• curprev 13:3213:32, 9 November 2011‎ Bisqwit talk contribs‎ m 11,727 bytes +10‎ align left
• curprev 13:3213:32, 9 November 2011‎ Bisqwit talk contribs‎ 11,717 bytes +174‎ +256x240 versions
• curprev 13:0813:08, 9 November 2011‎ Bisqwit talk contribs‎ m 11,543 bytes 0‎ center is at 0, not at 4...
• curprev 12:5012:50, 9 November 2011‎ Bisqwit talk contribs‎ 11,543 bytes +135‎ +source
• curprev 12:1012:10, 9 November 2011‎ Bisqwit talk contribs‎ 11,408 bytes +785‎ Add illustrative images

8 November 2011

• curprev 15:2315:23, 8 November 2011‎ Bisqwit talk contribs‎ m 10,623 bytes +2‎ +fix: voltages, not colors.
• curprev 15:1915:19, 8 November 2011‎ Bisqwit talk contribs‎ m 10,621 bytes +286‎ +misc tweaking instructions
• curprev 15:0915:09, 8 November 2011‎ Bisqwit talk contribs‎ m 10,335 bytes −14‎ remove irrelevant bit
• curprev 14:5714:57, 8 November 2011‎ Bisqwit talk contribs‎ m 10,349 bytes +24‎ +parentheses
• curprev 14:5314:53, 8 November 2011‎ Bisqwit talk contribs‎ m 10,325 bytes +6‎ +parentheses
• curprev 14:4714:47, 8 November 2011‎ Bisqwit talk contribs‎ m 10,319 bytes +13‎ bugfix
• curprev 14:2514:25, 8 November 2011‎ Bisqwit talk contribs‎ 10,306 bytes +495‎ +color tuning information
• curprev 13:5813:58, 8 November 2011‎ Bisqwit talk contribs‎ 9,811 bytes +78‎ +luma to chroma leaking
• curprev 13:5513:55, 8 November 2011‎ Bisqwit talk contribs‎ 9,733 bytes +4‎ No edit summary
• curprev 13:5313:53, 8 November 2011‎ Bisqwit talk contribs‎ m 9,729 bytes +71‎ +comments
• curprev 13:5213:52, 8 November 2011‎ Bisqwit talk contribs‎ m 9,658 bytes +4‎ fix up indents
• curprev 13:5113:51, 8 November 2011‎ Bisqwit talk contribs‎ 9,654 bytes +2,075‎ Add decoder
• curprev 13:3413:34, 8 November 2011‎ Bisqwit talk contribs‎ 7,579 bytes +630‎ Elaborate on the pixel running phenomenon
• curprev 13:2213:22, 8 November 2011‎ Bisqwit talk contribs‎ 6,949 bytes +2,815‎ Add example code for NTSC encoding

14 June 2011

• curprev 22:2522:25, 14 June 2011‎ Tepples talk contribs‎ 4,134 bytes +265‎ →‎Example Waveform: generation and demodulation example

21 December 2010

• curprev 14:0814:08, 21 December 2010‎ Tepples talk contribs‎ m 3,869 bytes +1‎ →‎Color Tint Bits: And this is how inconsistent information (such as that in the early docs) gets spread.
• curprev 13:2913:29, 21 December 2010‎ Tepples talk contribs‎ 3,868 bytes +320‎ →‎Color Tint Bits: Example of how darkening yellows (color 4) makes blue

2 March 2010

• curprev 14:5414:54, 2 March 2010‎ Tepples talk contribs‎ 3,548 bytes −24‎ →‎Brightness Levels: black level

11 June 2009

• curprev 14:0814:08, 11 June 2009‎ Ndwiki talk contribs‎ m 3,572 bytes +3,572‎ Created page with '''Note: This data is preliminary and still being reviewed.'' ==Basics== Master clock is 21.47727273 MHz. Each PPU pixel lasts four clocks. $xy refers to a palette color in the r...'