Post by spannernick on Mar 29, 2021 14:40:20 GMT
720p HDTV Ready Standard Resolution
720p (1280×720 px; also called HD ready or standard HD) is a progressive HDTV signal format with 720 horizontal lines and an aspect ratio (AR) of 16:9, normally known as widescreen HDTV (1.78:1). All major HDTV broadcasting standards (such as SMPTE 292M) include a 720p format, which has a resolution of 1280×720; however, there are other formats, including HDV Playback and AVCHD for camcorders, that use 720p images with the standard HDTV resolution. The frame rate is standards-dependent, and for conventional broadcasting appears in 50 progressive frames per second in former PAL/SECAM countries (Europe, Australia, others), and 59.94 frames per second in former NTSC countries (North America, Japan, Brazil, others).
The number 720 stands for the 720 horizontal scan lines of image display resolution (also known as 720 pixels of vertical resolution). The p stands for progressive scan, i.e. non-interlaced. When broadcast at 60[note 1] frames per second, 720p features the highest temporal resolution possible under the ATSC and DVB standards. The term assumes a widescreen aspect ratio of 16:9, thus implying a resolution of 1280×720 px (0.9 megapixels).
720i (720 lines interlaced) is an erroneous term found in numerous sources and publications. Typically, it is a typographical error in which the author is referring to the 720p HDTV format. However, in some cases it is incorrectly presented as an actual alternative format to 720p. No proposed or existing broadcast standard permits 720 interlaced lines in a video frame at any frame rate.
Comparison with 1080i
Progressive scanning reduces the need to prevent flicker by anti-aliasing single high contrast horizontal lines.
It is also easier to perform high-quality 50↔60 Hz conversion and slow-motion clips with progressive video.
A 720p60 (720p at 59.94 Hz) video has advantage over 480i and 1080i60 (29.97/30 frame/s, 59.94/60 Hz) in that it comparably reduces the number of 3:2 artefacts introduced during transfer from 24 frame/s film. However, 576i and 1080i50 (25 frame/s, 50 Hz), which are common in Europe, generally do not suffer from pull down artefacts as film frames are simply played at 25 frames and the audio pitch corrected by 25/24. As a result, 720p60 is used for U.S. broadcasts while European HD broadcasts often use 1080i50 24* frame, with a horizontal resolution of 1920 or 1440 depending on bandwidth constraints. However, some European broadcasters do use the 720p50 format, such as German broadcasters ARD and ZDF, and the Norwegian Broadcasting Corporation (NRK). Arte, a dual-language French-German channel produced in collaboration by ARD, ZDF and France Télévisions, broadcasts in German at 720p50 but in French at 1080i50. The Flemish Broadcasting Company (VRT) in Belgium was using 720p50, but switched to 1080i50 a few years ago.[when?]
Standard Resolution Aspect ratio
Small TVs 960×720 4:3
Standard 1280x720 16:9
It is, however, more commonly broadcast at (60/1.001), or precisely 59.940059, matching the NTSC SDTV field rate; this and the 50.00 Hz of PAL are still the second and third highest standard framerates.
The C64 has a resolution of 320×200 pixels, consisting of a 40×25 grid of 8×8 character blocks. The C64 has 255 predefined character blocks, called PETSCII, so you can see how upscaled the VICE emulator is to 720p, this is why you need descaling the picture so you can not see the blocks of the original C64 screen, you have the same problem with PS1 games on PS Classic or on the Mega Drive Mini, that why they have to add filters and a CRT filter to make the screen less blocky, upscaling is like your just zoom in to the original screen to fit your screen so its full screen like 2x scale.
If you use your THEC64 on your PC like I do thought a HDMI USB Capture Card(I used before that a EasyCap USB and a Composite Signal and a Mini HDMI2AV and Dscaler, like the original C64 did) it like its a Svideo picture now.. , I have my original C64C connected to Svideo that connected to my 4:3 monitor in my Bedroom, My THEVIC20 is in the Front room connected to my PC so I can work on PCU easier.
The HDMI signal is the best I have seen on it and I run it a 720p, there is no real different running it at 720p or 1080p, I use now OBS(Open Broadcaster Software Studio) on my PC so I can see the HDMI signal from it, the lower the resolution the better, you can not run it at 1920x1080, it lags to much so when you move the yellow box on the carousel it lags behind the sound so the flip sound first then a half a second later the movement of the yellow box moves, its about how your PC can handling the resolution on the OBS Studio on your PC.
I add this thread if anyone want to know about 720p and what to talk about it or ask a question about the display on the machines(THEC64 Mini/Maxi and THEVIC20).
I hope you all have a nice day and enjoy the sun... and happy April Fools Day..