The word "PALIS" is often misspelled due to its uncommon usage in modern English. However, its origins can be traced back to the Latin word "palus," meaning "stake." In IPA phonetic transcription, "PALIS" is spelled /ˈpælɪs/, with the stressed syllable being "PAL." The "IS" at the end of the word is pronounced as a schwa sound, similar to the "uh" sound, making it easy to confuse with "PALACE." So, remember that "PALIS" is spelled with an "I" and not an "E."
PALIS is an acronym that stands for "Phase Alternating Line Integrated Standard". PALIS is a color encoding system predominantly used in analog television broadcasting and playback systems. It is a broadcast television format that was developed to ensure the compatibility of color transmission and reception between various video devices.
PALIS was first introduced in the 1960s and quickly became the standard for color television broadcasting in many countries across Europe, Asia, Africa, and Oceania. The primary goal of the PALIS system was to overcome the compatibility issues that were persistent in the earlier NTSC (National Television System Committee) color encoding system used in North America and Japan.
PALIS accomplishes this through a technique called phase alternation, in which the phase of the color information is continually reversed between alternate scan lines. This alternation helps to minimize the visibility of color artifacts and reduces the impact of transmission errors, providing more accurate and stable color reproduction on television screens.
The PALIS system operates at a refresh rate of 50 interlaced fields per second, with each frame consisting of two alternating fields, resulting in a final frame rate of 25 frames per second. It uses a color subcarrier frequency of 4.43 MHz and 625 lines per frame.
Overall, PALIS is an internationally recognized and widely adopted color encoding standard that continues to be used in many regions for analog television broadcasting, although it has been largely replaced by digital standards in recent years.