Questions tagged [ntsc]
The US standard for television broadcast, before HDTV (ATSC) came out.
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RS-170 and SMPTE 170M Encoder
I have been searching for a Video Encoder (DAC) that can output composite signals that are EIA-170/RS-170 and SMPTE 170M standard compliant. I might not be understanding these standards correctly but ...
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Convert Composite Video to RS-422 [closed]
I misinterpreted my requirements and asked the question below, which does not make sense.
I am designing a Digital (TMDS/HDMI) to Analog (Composite) video circuit. I am almost to the end. The last ...
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How is this bit of logic generating its short output pulse (and is it supposed to be longer)?
I'm debugging a 1970s bitmap video generator board, and potentially among other issues it's not syncing happily to the old B&W video monitor I'm using (which is quite forgiving). The NTSC video ...
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What is my next step to debugging an old NTSC video generator circuit that doesn't sync?
I know this is somewhat broad but I hope it's appropriate here. I have a 1970s PCB that is designed to output a sort of bitmap video image via a standard NTSC signal. It came to me as a half-built kit ...
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NTSC Video signal frequency
This a part of a video signal (NTSC). The active video part is plotted on the screen.
In my understanding, there are parts cut away by the "fly back and the settle" for preparing to plot the ...
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Why does NTSC video have separate reference blank and reference black levels, and how does this affect format conversion?
Re-reading the Wikipedia page on the IRE unit I noticed something new to me: reference black in PAL and SECAM is 0 IRE, rather than 7.5 IRE as it is in NTSC. This brings up a whole host of questions, ...
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Digital to analog in an old 35mm film recorder [closed]
I'm looking at an old film recorder from 1985, the Polaroid Freeze Frame, the back of the machine pictured here:
From here: https://www.radiomuseum.org/r/polaroidco_freezeframe_video_recorder.html
I ...
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How do phase errors appear in the NTSC color subcarrier?
So, NTSC uses a YIQ color space, with the I and Q channels encoded in a color subcarrier using QAM with the carrier suppressed.
NTSC had a reputation for poor color reproduction—“Never Twice the Same ...
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Is the peak to peak amplitude of a NTSC composite signal always the same?
I am currently trying to learn more about video signals. I'm particularly interested in NTSC since I live in North America.
I recently bought an oscilloscope (Siglent SDS1104X-E) and I am trying to ...
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PAL Video - Horizontal Color Pixels
I've created an 8-bit VGA controller that outputs a 400x300 RGB signal. I also want to implement an AV output using PAL encoding. I don't understand how I can achieve the same resolution since the ...
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single supply op amp non inverting level shifter for NTSC signal processing from 0-0.7Vpp to 2-2.5Vpp
I am performing an RGB modding of an NTSC CRT TV. By performing tests I found out that the chroma chip will accept 2-2.5V Vpp RGB signal to get the proper colors. So I need to amplify and shift my ...
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Capture and transmit NTSC with ESP32? (w/video decoder chip)
Is it possible to use a video decoder (ie. MAX9526) with an ESP32 to capture an NTSC composite video signal and then transmit over a web service?
Can anybody give me any advice or information?
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Multiply a frequency by 227.5 times? The quest to get to 3.57954MHz
I need to somehow multiply a 15734.26Hz signal by 227.5 times. Those with a keen eye (or a calculator) will notice the result is very close to NTSC subcarrier frequencies. 3.579545MHz or close as damn ...
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Is fractional PLL the key functionality that defines whether a microcontroller is able to generate an analog TV signal?
I've been researching microcontrollers with the goal of outputting NTSC and/or PAL video signals.
And when I look at the microcontroller specifications, it appears to me that the single most important ...
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Analog video chrominance decoding - PAL/NTSC
I'm implementing an analog video decoder on FPGA.
I find some difficulties during chrominance decoding. I appreciate if you can help me.
These are the steps as I'm doing:
I generate an NTSC ColorBar ...
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Will an RF modulator provide NTSC System M spec video from a DVD player?
I've been attempting to recreate the effect of an old NTSC television broadcast lately with the use of DVDs. The DVD-Video spec allows for up to 720 x 480 pixels at a display rate of 29.97 frames per ...
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Replacement NTSC colorburst crystal won't oscillate
First of all, an honest warning - I am a brave (and stubborn) idiot, and a self-taught idiot to boot. I know my way around the basics and have repaired some non-trivial circuits (various complex acid-...
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Practical question on high resolution to composite/S-video
I read many resources on the internet talking about NTSC, PAL, timing and voltage levels. But I have specific practical question, and I can not find definite answer to it. There're very helpful posts ...
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AC-Coupling on Composite video
Many sources say that composite video input should be AC-coupled. Voltage levels for blank, black and white signal are also specified. How is it possible to detect these voltage levels after AC ...
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How to interpret this NTSC color waveform?
How can the following NTSC video signal be interpreted? Is it using phases or frequencies or amplitudes?
Is this above only the color information of a video broadcast signal?
I have no background on ...
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Why do most FPV 5.8 GHz video transmitters use PAL or NTSC?
I am not much into the details of video transmission in general. However, I wonder since most displays and electronics are digital, why have suppliers for FPV equipment chosen an analog transmission ...
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SD card both photo/video recording and data logging [closed]
How can I capture photos and videos (JPEG and MPEG4 respectively) taken from an NTSC camera to an SD card and also log text data to it?
I am working on a project in which I need to log analog data ...
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Can I use a 12MHz for NTSC video generation
I want to use a shift-register to generate video signal directly from SRAM. And researching I found that the pixel rate of NTSC is 12.272MHz and I can't find any crystal closer to that speed than ...
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Horizontal overscan on NTSC
How much horizontal overscan is there on a typical NTSC CRT television set?
Vertical overscan, there are nominally 240 scan lines per field, of which you can reasonably count on having slightly more ...
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IP Camera IC (PAL to Ethernet)
I have a design problem to capture CCIR/PAL video from the camera that is available and send it over ethernet. Need to come up with my own printed circuit board design, having no prior experience in ...
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Raspberry PI composite color video resolution puzzle
I have a rather theoretical question.
I connected my Raspberry Pi to my Composite NTSC TV and observed that the terminal video output has 640 pixels horizontal resolution with nice solid clear colors ...
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How is NTSC analog video written to a Video8 tape, or analog tape in general for that matter?
I am trying to recover some videos on a Video8 tape and was wondering how in general how analog video was written to tapes. I've been researching the NTSC specification and it seems like there are ...
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Rainbow artifacts in composite video
Background: I am trying to reverse engineer a small endoscopic camera for a class project. The camera is connected to its own screen, and I do not have the specs for either. Thus far I have learned ...
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What amount of noise on Vcc is acceptable?
I have added a .1uF decoupling capacitor between Vcc and GND on a TMS9118 (this is an old video display processor). When I measure the voltage at Vcc with my oscilloscope, I read a pk - pk of 1V. Is ...
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Lack of color displaying composite video
I'm attempting to output video from a TMS9118 VDP to a television's composite video port. Right now the result I'm getting is grey scale (whereas the background should be green), and I have no idea ...
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How to fix a frequency shifted audio part of an RF signal?
I tried to connect an old Japanese (NTSC, System M) video gaming system (an original Famicom, HVC-001) to a rather modern multisystem LCD TV-set (Sharp LC-43CFE5222E). The TV tuner is capable of ...
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Is the design decision for different frequencies in PAL and NTSC related to the AC mains power frequency?
In discussion a friend mentioned:
In the original implementation of PAL and NTSC they used the AC current as a means providing the frequency for the TV. As the different mains had different ...
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Video Standard White Levels, RS-170 or RS-343
I have a customer defining some equipment which outputs analogue video. They have said it would be to NTSC RS-170A standard Y C (on a S-Video, Mini Din connector), however I'm not sure if they really ...
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Separating the AM and QAM components in PAL signal demodulation
I'm attempting to emulate the modulation and demodulation of a PAL video frame in software, but I'm having trouble understanding how the AM (luma) and QAM (UV) components of the signal are separated ...
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Phase in NTSC and TMS9918
In the YIQ space (I am referring to this wikipedia's article) colors with phases near 0 are close to red.
In the TMS9918 datasheet's table, however, in the expression of colors as A' and phase, blue ...
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How to generate a composite video
I am working on a project that will output either NTSC or PAL video.
The video is mainly text (color and Hebrew text) on top of a background image (that I need to download to the microcontroller).
...
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Can the DS1052E be used for reliable NTSC measurement?
I'm in the market for an oscilloscope. I've read that the infamous DS1052E from Rigol is a great beginner scope due to the price/performance.
However, I know I have a lot to learn and simply don't ...
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RGBHV (VGA) to YPbPr Converter and Waveforms?
Purely for hobby, I am working on an RGBHV (VGA) to YPbPr (Component) converter circuit for old games consoles modified to output RGBHV on a VGA cable. From the game consoles, the RGB signal is taken ...
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TVOUT using NTSC in Arduino Leonardo
I'm trying to use Arduino Leonardo with TVOUT library (the only one that I found to do NTSC modulation).
The problem is that I can't even run the example, I searched in serveral forums without a ...
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HDMI/VGA/NTSC/PAL to 24-bit parallel RGB interface [closed]
Adafruit.com is selling TFT-LCD modules that comes with an NTSC/PAL driver board. The product specification page includes a link to the original manufacturer´s datasheet/specifications for the TFT ...
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Video Composite signals
What are the considerations for PCB layout, and connector selection for video signals. Is it necessary to follow 75ohm impedance criteria in a closed system. The pipeline starts at Sony FCB IX 11 A ...
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RC PWM video switch
I'm currently working on a quadcopter that I'm equipping with several video cameras of various sizes/quality (i.e. one high quality, forward facing camera, then three or four cheap micro cameras ...
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Processing NTSC video feed for SPI display
I have recently started a project where I want to use this small camera and and have it relay the live video to a very small color LCD, like this one through an Arduino.
Unfortunately the camera has ...
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Matching a transformer to one in a video balun - Vertical sync is off
I building an interconnect board which will hold one side of the video balun pair (plus power and rs485). The other side will be a commercially available video balun which connects to the camera.
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NTSC -> ADC -> USB. A video digitzer circuit
I'm working on a project that ultimately needs to incorporate an analog video camera input, digitizing it and spitting it out a USB port as an MPEG stream. My general aim is for roughly a VGA ...
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Image processing on PAL/NTSC
I want to process a PAL or NTSC video signal and pick up colors, like green, orange, blue and red. Is there any way to decode RGB from NTSC/PAL easily, and then detect these colours? I'm looking for a ...
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Transmitting NTSC over digital link
I'm interested in capturing analog video in NTSC and transmitting it as efficiently as possible over a digital link, preferably while maintaining as much fidelity to the original signal as possible. ...
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slick way of muxing power+NTSC video over RG59/RG136?
I've got a few NTSC security cameras I'd like to set up around the perimeter of the house. They output standard NTSC video and require 12V for power. I was hoping to power them and take video off the ...
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How to determine if TV is on by looking at yellow RCA monitor signal?
I have a U.S./NTSC LCD HDTV that has a yellow RCA monitor jack on the back. Would it be possible to monitor this connector on an analog input of a microcontroller to determine when the TV is on or ...
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