What is the difference between NTSC and PAL?

Most countries in North and South America, including the US and Canada, use the National Television Standards Committee (NTSC) format, while Europe, Australia and Asia use a competing format called Phase Alternative Lines (PAL). The main difference between the two formats is the speed at which the broadcast is displayed on the TV screen: NTSC is displayed at 30 frames per second (FPS), while PAL provides 25 fps. Each format also uses a different number of rows on the old analog TV display when displaying a signal and creating two different resolutions. However, the extensive acceptance of high -resolution TVs (HDTV) did not exclude this difference because older transmission methods have influenced digital signal playback.

primary difference

The differences between these formats actually start with an electric power system for transmissions displayed on television. In the US and countries such as Canada and Mexico, electricity is generated to 60 Hertz, so from the technicalThe NTSC signal is also sent to 60 "fields" per second. The first field is responsible for all odd lines on the screen, while the second contains a even number. Because most analog TVs use the interlaced system, it means that 30 fields of one type are sent, along with 30 second -type fields each second.

This alternation of the line is so fast that it is undetectable to the human eye, similar to the film flowing through the projector. The result of NTSC is 30 frames of a complete picture that consists of two fields for each frame that appears every second. Since countries in Europe and Asia often use 50 hertz power, the equivalent PAL lines are based on 50 fields per second. This means that the PAL signal is displayed at 25 fps, consisting of two sets of 25 AC lines.

resolution of resolution

Another difference between NTSC and PAL formats is the quality of the resolution. HearsMCO PAL can have fewer images per second, showing more lines than NTSC. PAL broadcasts contain 625 lines of resolution, from top to bottom, compared to 525 NTSC. Multiple lines usually mean more visual information, resulting in better image quality and resolution. When the NTSC video tapping is converted into PAL, black bars are often used to compensate for a smaller aspect of the screen, similar to the poles and the bottom of the Letterbox field or the "wide" field.

problems with color signals

When the NTSC format was first admitted in 1941, there was a small discussion on color transmission. However, as technology for color TV has evolved, engineers had to create a broadcast method that would still allow monochrome television files to get a picture. The PAL system, on the other hand, was created after the arrival of color broadcasting, so the color signals are Much -Truer in the original image. This distinction often means that a non -converted signal that is played on TV Jiného format may seem rather black and white than color.

convert options

European television may not work properly in the United States, and NTSC video will usually not play PAL. To solve this problem, there are many companies that offer conversion kits from one format to another. Some of these conversion methods may be time consuming and differ in quality, although there are companies that provide transfer services for a fee.

If the PAL film is converted into NTSC tape, 5 other frames must be added per second or the action seems to be "jerky". The opposite applies to the NTSC film transformed into PAL; Five frames must be removed per second or movement can be unnaturally slow. Since sound and video data is often connected, the audio signal may also be necessary to accelerate or slow down to the sound of Correct during playback.

differences move forward

While the transition from analog to digital and hd teLevisors were the opportunity to withdraw from older formats, some restrictions remained. TVS must still display a picture based on a certain number of frames every second and so much HDTV in the US or Europe is still displayed in 30 or 25 fps. However, the improvement is that these devices are often customizable and one HDTV could be able to broadcast in format and function properly in any area. It all depends on the features of a particular TV model and on what options are available in the settings menu.

coding new media and region

Video Home System (VHS) Tapes have been limited to NTSC or PAL playback in the past, while newer digital formats such as DVD and Blu-ray ™ do not have this restriction. The hardware of the newer media player is more often designed to work with one or the other format to work properly with Various TVs, although it can technically be able to use both. However, DVD and Blu-rays ™ are usually coded in the region, which zamAMENA that they only work with players from a particular area. DVD coded for region 1, which includes the US and Canada, will usually not work in a DVD player from Germany, which is in region 2.