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USB 80Gbps接口标准正式发布 USB 3.0/USB4称呼被淘汰_我的网站

一 |     LOS ANGELES -- By the time the scuba dive boat sank off the Southern California coast after catching fire, 34 people had been killed in the deadliest maritime disaster in recent U.S. history.The Labor Day tragedy in 2019 spurred changes to maritime regulations, congressional reform and civil lawsuits. Now four years later, a federal trial for the Conception's captain, Jerry Boylan, is set to begin Tuesday with jury selection in Los Angeles.It's been a long, frustrating wait for the families of those who perished. They say a judge's ruling that their loved ones should not be called “victims” at trial has only added to their pain. “The past four years have been like living in a nightmare that you don’t wake up from,” said Kathleen McIlvain, whose 44-year-old son Charles was killed. The 75-foot (23-meter) boat was anchored off the Channel Islands, about 25 miles (40 kilometers) south of Santa Barbara, on Sept. 2, 2019, when it caught fire before dawn on the last day of a three-day excursion, sinking less than 100 feet (30 meters) from shore. The National Transportation Safety Board blamed Boylan for the tragedy, saying his failure to post a roving night watchman allowed the fire to quickly spread undetected, trapping the 33 passengers and one crew member below. Those on board included a new deckhand who’d landed her dream job and an environmental scientist who did research in Antarctica, along with a globe-trotting couple, a Singaporean data scientist, three sisters, their father and his wife. U.S. District Judge George Wu on Oct. 12 granted Boylan's request to bar most if not all references to “victims” — which the captain's attorneys say is a prejudicial term that jeopardizes his right to a fair trial. It's the latest setback for the prosecution.A grand jury in 2020 initially indicted Boylan on 34 counts of a pre-Civil War statute colloquially known as “seaman’s manslaughter” that was designed to hold steamboat captains and crew responsible for maritime disasters. Each count carries up to 10 years in prison in a conviction, for a total of 340 years.Defense lawyers sought to dismiss those charges, arguing the deaths were the result of a single incident and not separate crimes. Prosecutors got a superseding indictment charging Boylan with only one count.Then in 2022, Wu ruled the superseding indictment failed to specify that Boylan acted with gross negligence, saying that was a required element to prove the crime of seaman’s manslaughter. He dismissed that indictment, forcing prosecutors to go before a grand jury again.Boylan is now charged with one count of misconduct or neglect of ship officer. The single count means he faces only 10 years behind bars if convicted.He has pleaded not guilty and denied any wrongdoing. His federal public defenders did not return The Associated Press' repeated requests for comment, and a spokesperson for the U.S. Attorney's Office declined to comment.Some of the dead were wearing shoes, prompting investigators to believe they were awake and trying to escape. Both exits from the below-deck bunkroom were blocked by flames. Coroner’s reports list smoke inhalation as the cause of death, though official autopsies were never conducted.What exactly started the predawn fire remains unknown. Early official scrutiny appeared to focus on a spot where divers plugged in phones and other electronics. But a Los Angeles Times story, citing a confidential report by the Bureau of Alcohol, Tobacco, Firearms and Explosives, said the blaze began in a plastic trash can on the main deck though an official cause remains undetermined. Boylan and four crew members sleeping in the upper deck told investigators they tried to save the others but were ultimately forced to jump overboard to survive. Boylan made a mayday call at 3:14 a.m. just before abandoning ship.Dozens of family members have since formed “Advocacy34” to push for strengthened boating regulations. While seeking answers, they’ve comforted each other during loved ones’ missed birthdays and mourned each anniversary.“We have no idea when we’ll get those answers, or if we ever will,” McIlvain said.At the time of the fire, no owner, operator or charterer had been cited or fined for failure to post a roving patrol since 1991, Coast Guard records showed.The NTSB faulted the Coast Guard for not enforcing that requirement and recommended it develop a program to ensure boats with overnight passengers actually have the watchman.The Coast Guard has since enacted new regulations regarding fire detection systems, extinguishers, escape routes and other safety measures as mandated by Congress. But it has yet to implement a comprehensive safety management system after industry advocates pushed back, citing costs.Victims' families have sued the Coast Guard in one of several ongoing civil suits.Three days after the inferno, Truth Aquatics Inc., which belongs to the Conception’s owners, Glen and Dana Fritzler, filed a lawsuit in U.S. District Court in Los Angeles under a pre-Civil War provision of maritime law that allows it to limit its liability to the remains of the boat, which was a total loss. The time-tested legal maneuver has been successfully employed by the owners of the Titanic and other vessels, and requires the Fritzlers show they were not at fault.The couple's attorneys did not respond to requests for comment.In response to the families' outcry, federal lawmakers last year updated the Limitation of Liability Act of 1851 so owners can be held liable for damages regardless of the boat’s value afterward. The law is not retroactive, however, and will not apply in the case of the Conception.。    到了USB4，不但再次改变命名方式，技术上也变懒了，几乎直接承袭了Intel捐献的雷电3标准，从物理底层到技术规格都如出一辙。新鲜出炉的USB4 v2.0，也不是接口名字，而只是规范命名。从此以后(到下次再改名)，USB接口将统一以传输带宽命名，USB4 v2.0对应USB 80Gbps，USB4对应USB 40Gbps，USB 3.2 Gen2x2对应20Gbps，USB 3.2 Gen2对应USB 10Gbps，USB 3.2 Gen1对应USB 5Gbps……更古老的USB 2.0、USB 1.0保持不变，因为它们的速度太慢了，还停留在Mbps数量级。如果改叫USB 480Mbps，不但麻烦还容易引起误会(你也知道容易误会啊)。

二 | 所以请注意新接口下的包装标识、接口标识、数据线标识：回到UBS4 2.0或者说USB 80Gbps，它的首要变化自然是带宽再次翻番来到了80Gbps，这得益于新的基于PAM3信号编码机制的物理层架构，同时还有新定义的80Gbps有源数据线。在特定应用场景中，比如8K超高清显示，USB 80Gbps还可以配置为非对称编码异步传输模式，一个方向可以高达120Gbps，从而足够承载DP 2.0/2.1 UHBR20信号，另一个方向则是40Gbps。其次，USB 80Gbps升级了数据和显示协议，可以更好地利用带宽，其中数据传输支持20Gbps的高带宽，显示传输则和DP 2.0、PCIe 4.0相互打通，共享PHY物理层，从而一个接口搞定高速数据、显示。当然了，USB 80Gbps依然保持向下兼容，而且只有USB Type-C一种接口形式。

三 | 顺带一提，USB Type-C接口规范、USB PD供电规范也已升级，与USB 80Gbps保持同步。

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Published on:22:47:52