Year 576 (DLXXVI) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 576 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
|576 in various calendars|
|Ab urbe condita||1329|
|Balinese saka calendar||497–498|
|Chinese calendar||乙未年 (Wood Goat)|
3272 or 3212
— to —
丙申年 (Fire Monkey)
3273 or 3213
|- Vikram Samvat||632–633|
|- Shaka Samvat||497–498|
|- Kali Yuga||3676–3677|
|Iranian calendar||46 BP – 45 BP|
|Islamic calendar||47 BH – 46 BH|
|Minguo calendar||1336 before ROC|
|Seleucid era||887/888 AG|
|Thai solar calendar||1118–1119|
702 or 321 or −451
— to —
703 or 322 or −450
576i is a standard-definition video mode originally used for broadcast television in most countries of the world where the utility frequency for electric power distribution is 50 Hz. Because of its close association with the color encoding system, it is often referred to as simply PAL, PAL/SECAM or SECAM when compared to its 60 Hz (typically, see PAL-M) NTSC-color-encoded counterpart, 480i. In digital applications it is usually referred to as "576i"; in analogue contexts it is often called "625 lines", and the aspect ratio is usually 4:3 in analogue transmission and 16:9 in digital transmission.
The 576 identifies a vertical resolution of 576 lines, and the i identifies it as an interlaced resolution. The field rate, which is 50 Hz, is sometimes included when identifying the video mode, i.e. 576i50; another notation, endorsed by both the International Telecommunication Union in BT.601 and SMPTE in SMPTE 259M, includes the frame rate, as in 576i/25.
Its basic parameters common to both analogue and digital implementations are: 576 scan lines or vertical pixels of picture content, 25 frames (giving 50 fields) per second.
In analogue 49 additional lines without image content are added to the displayed frame of 576 lines to allow time for older cathode ray tube circuits to retrace for the next frame, giving 625 lines per frame. Digital information not to be displayed as part of the image can be transmitted in the non-displayed lines; teletext and other services and test signals are often implemented.
Analogue television signals have no pixels; they are rastered in scan lines, but along each line the signal is continuous. In digital applications, the number of pixels per line is an arbitrary choice as long as it fulfils the sampling theorem. Values above about 500 pixels per line are enough for conventional free-to-air television; DVB-T, DVD and DV allow better values such as 704 or 720.
The video format can be transported by major digital television formats, ATSC, DVB and ISDB, and on DVD, and it supports aspect ratios of standard 4:3 and anamorphic 16:9.576p
576p is the shorthand name for a video display resolution. The p stands for progressive scan, i.e. non-interlaced, the 576 for a vertical resolution of 576 pixels, usually with a horizontal resolution of 720 or 704 pixels. The frame rate can be given explicitly after the letter.German submarine U-576
German submarine U-576 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. She carried out five patrols, sinking four ships of 15,450 gross register tons (GRT) and damaging two more of 19,457 GRT. She was sunk in July 1942 by depth charges from two US aircraft and gunfire from a merchant ship, near the East Coast of the United States. The wreck was discovered in August 2014.Laser 558
Laser 558 was an offshore pirate radio station launched in May 1984 using disc jockeys from the USA. It broadcast from the Panama registered ship MV Communicator in international waters in the North Sea. Within months the station had a large audience due to its strong signal and continuous music mixing current records with oldies. However, insufficient advertising starved the station off the air in late 1985. In 1986 an attempt was made to return as Laser Hot Hits, but the same problems arose.List of New Mexico State Roads shorter than one mile
There are 26 state roads that are shorter than one mile (1.6 km) long in the U.S. state of New Mexico that are maintained by the New Mexico Department of Transportation. The shortest, State Road 446, is a quarter-mile (402 m) long and serves to connect Valmora to State Road 97. State Road 597, the second shortest highway, links U.S. Route 160 to the Four Corners Monument, a tourist destination on the Navajo Nation where the states of Utah, Arizona, New Mexico, and Colorado meet. In comparison, the longest state road in New Mexico is State Road 120, 119.031 miles (191.562 km) long, which is more than 475 times longer than the shortest state road.List of United States Supreme Court cases, volume 576
This is a list of all the United States Supreme Court cases from volume 576 of the United States Reports:
Note: As of February 2019, final bound volumes for the U.S. Supreme Court's United States Reports have been published through volume 569. Newer cases from subsequent future volumes do not yet have official page numbers and typically use three underscores in place of the page number; e.g., Salman v. United States, 580 U.S. ___ (2016). In those cases, the docket number—usually two digits, a dash, and the 1-to-4 digit case number—is used instead; e.g. Salman v. United States, 15-628. If a case citation in a volume after 569 is shown with a page number, the page number is based on unofficial reporting and is subject to change when the decision is bound and printed.No. 576 Squadron RAF
No. 576 Squadron RAF was a Royal Air Force Second World War heavy bomber squadron.Paris's 10th constituency
The 10th constituency of Paris (French: Dixième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 11th constituency
The 11th constituency of Paris (French: Onzième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 12th constituency
The 12th constituency of Paris (French: Douzième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 13th constituency
The 13th constituency of Paris (French: Treizième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 14th constituency
The 14th constituency of Paris (French: Quatorzième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 17th constituency
The 17th constituency of Paris (French: Dix-septième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 18th constituency
The 18th constituency of Paris (French: Dix-huitième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 4th constituency
The 4th constituency of Paris (French: Quatrième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Paris's 8th constituency
The 8th constituency of Paris (French: Huitième circonscription de Paris) is a French legislative constituency in the Paris département (75). Like the other 576 French constituencies, it elects one MP using the two-round system.Pennsylvania Route 576
Pennsylvania Route 576 (PA Turnpike 576), the Southern Beltway, is a partially completed tolled freeway in the southern and western suburbs of Pittsburgh, Pennsylvania, United States. Upon completion it will serve as a southern beltway around the metro Pittsburgh area from the Pittsburgh International Airport to the historic Steel Valley of the Monongahela River.
The first section of the highway from Interstate 376 (PA 60 at the time) near Pittsburgh International Airport to U.S. Route 22 opened on October 11, 2006 at 3 p.m. Construction on a segment of the beltway that will link US 22 to I-79 near the National Cemetery of the Alleghenies is currently underway and planned for a 2021 opening, while the final segment from I-79 to PA Turnpike 43 is pending. Federal approval has been given for both segments. Although PA Turnpike 576 runs north–south between I-376 and US 22, the route is signed as east–west to reflect the routing that the completed beltway will take; PA Turnpike 576 will begin to have a more general east–west routing when the second leg to I-79 opens in 2021.Like the Mon–Fayette Expressway, the Southern Beltway will have no direct connection to the Pennsylvania Turnpike's mainline despite being built and maintained by the Pennsylvania Turnpike Commission (PTC). (Both the tolled section of Interstate 376 and PA Turnpike 66 as well as the Northeast Extension have direct connections to the Turnpike's mainline.) Both highways, however, will have indirect connections with the Turnpike's mainline via I-376.Pope Peter IV of Alexandria
Pope Peter IV of Alexandria was the 34th Pope of Alexandria and Patriarch of the See of St. Mark from 567 to 576.
Peter IV succeeded the exiled Pope Theodosius I on the latter's death in 567.Standard-definition television
Standard-definition television (SDTV or SD) is a television system which uses a resolution that is not considered to be either high or enhanced definition. The two common SDTV signal types are 576i, with 576 interlaced lines of resolution, derived from the European-developed PAL and SECAM systems; 480i based on the American NTSC system. SDTV and high-definition television (HDTV) are the two categories of display formats for digital television (DTV) transmissions.
In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals, with widescreen content being center cut. However, in other parts of the world that used the PAL or SECAM color systems, standard-definition television is now usually shown with a 16:9 aspect ratio, with the transition occurring between the mid-1990s and mid-2000s depending on region. Older programs with a 4:3 aspect ratio are broadcast with a flag that switches the display to 4:3.Standards that support digital SDTV broadcast include DVB, ATSC, and ISDB. The last two were originally developed for HDTV, but are more often used for their ability to deliver multiple SD video and audio streams via multiplexing, than for using the entire bitstream for one HD channel.SDTV refresh rates can be 24, 25, 30, 50 or 60 frames per second with a possible rate multiplier of 1000/1001 for NTSC. 50 and 60 rates are generally frame doubled versions of 25 and 30 rates for jitter issues when using non-interlaced lines.
Digital SDTV in 4:3 aspect ratio has the same appearance as regular analog TV (NTSC, PAL, SECAM) without the ghosting, snowy images and white noise. However, if the reception has interference or is poor, where the error correction cannot compensate one will encounter various other artifacts such as image freezing, stuttering or dropouts from missing intra-frames or blockiness from missing macroblocks. The audio encoding is the last to suffer loss due to the lower bandwidth requirements.USS Murray (DD-576)
The third USS Murray (DD/DDE-576) was a Fletcher-class destroyer in the United States Navy during World War II. Murray was named for Capt. Alexander Murray and his grandson Rear Adm. Alexander Murray
Murray (DD-576) was laid down on 16 March 1942 by Consolidated Steel Corporation, Orange, Texas and launched on 16 August 1942, sponsored by Mrs. Frank T. Leighton. The ship was commissioned on 20 April 1943, Comdr. Richard F. Stout in command.