有线vs无线：控制输入延迟

Nothing is more frustrating than playing a game of Rock Band, only to find that something is slightly...*off*. Sure, your friend can't sing on key and the bass buttons sticks, but the real problem, it seems, is your drums — terribly off-beat, and out of sync with the rest of the band.

没什么事儿比这更令人沮丧了：正玩《摇滚乐队》游戏，意料之外地发现有点.....“结束出局下台吧您呐”。当然当然，你的朋友没唱准，而且贝司的按键有些粘滞，不过真正的问题...似乎...是你的鼓打得太糟糕了，一点儿都不在鼓点上，和整个乐队不同步。

Luckily, most rhythm games have their own built-in calibration tools to ensure that all your instruments sound just right. But when it comes to the traditional keyboard and mouse, PC gamers aren't so lucky. Input lag on a wireless device can be more of a problem than you'd think, and worse still, it's tough to diagnose and fix. But for those of you who favor your wire-free lifestyle, we have a few tips for keeping your wireless keyboards and mice lag-free.

 

幸而大多数节奏类游戏都有自己的内置校准工具来确保你所有的乐器听起来都正常。但是这类情况要是发生在传统的键盘鼠标上，PC游戏玩家们就没有这么幸运了。无线设备输入延迟问题比你想象的要严重，更糟的是诊断分析并搞定这个问题是十分艰难的。但是对那些乐于享受无线自由生活的人，我们献出几条小建议，可以让你的无线键鼠没有延迟。

What's important to remember is that input lag isn't the same thing as response time. HDTVs, and many LCD monitors, apply various post-processing algorithms to a picture that, ever-so-slightly, slows down the rate at which information is displayed on screen. This is especially apparent in fighting and rhythm games, prompting many television makers to turn off this post-processing effect during games for much improved latency. As you can probably tell, this is a very different problem from input lag, where it's the peripheral itself is causing the delay.

有个重要的事要记住，那就是输入延迟和反应时间不是一码事儿。高清电视和很多液晶显示器对于图像采用各种后处理算法，这样，尽管很轻微，但还是减缓了信息显示屏幕上的速率。在格斗类和节奏类游戏中，这种现象尤为明显。这提醒了很多电视制造商在游戏过程中关闭后处理效果，因而能大大改善滞后状况。正如你可能区分出来的，这和输入延迟是截然不同的问题，输入延迟是外部设备本身造成的延迟。

For obvious reasons, wired devices are near-impervious to this sort of issue; there's nothing stopping the button's electrical signal from reaching your PC along the way. Wireless devices, however, introduce a number of different factors that make the transmission of this signal a lot more difficult. As we've explained in the past, manufacturers use various wireless technologies to send your strongly-worded forum posts on-screen. Older, 27MHz wireless is often found in low-end products, and is prone to interference and range issues. Both 2.4GHz and Bluetooth technologies, meanwhile, are much improved, but still susceptible to problems of their own.

显然，对于这种问题有线设备是近似无干扰的：没什么会阻止按键的电信号沿着线输入到你的电脑。而无线设备面临很多不同的因素可以使得信号的传输更加困难。正如我们以前曾解释的，制造商运用各种无线技术把你在论坛上发的言辞激烈的帖子显示到屏幕上。27MHz的老古董无线设备常用在低端产品上，这东西很容易大范围产生干扰。同时，2.4GHz和蓝牙技术尽管很先进，但其自身也容易产生问题。

Nevertheless, if you suspect you're a victim on input lag, there's a few things you can do to diagnose and solve your mouse and keyboard woes. PC World points out a web-based reaction test that can actually be used to measure response times between wired and wireless mice. After establishing an average with your wired mouse, determine by how much the two models differ. If your results are off by more than a few milliseconds, wireless lag may be the cause.

不过，如果你怀疑自己已经沦为输入延迟的牺牲品，这里还是有几件事你可以做从而诊断分析并解决你的鼠标键盘的悲剧的。《微电脑世界》指出一个网页版反应测试，可以真正用来测量有线和无线鼠标的反应时间。在你用有线鼠标建立起平均值数据后，两个数据模型的差别大小就决定了最后结果。如果你的结果差异超出毫秒级的范围，无线延迟可能就是其原因。

Another simple keyboard test is to move between items in a list. Using the up or down keys to navigate the contents of a a Finder or Explorer window, your selection should appear to change instantly, immediately after the key is pressed. Subtle lag will be hard to recognize, but more serious problems will become immediately apparent as the selection on-screen fails to match what your fingers are doing.

另一个简单的键盘测试是在一个列表上的项目之间移动。用向上向下键在Finder（苹果的资源管理器）或Explorer（Windows资源管理器）的窗口进行内容巡览，你的选项应该在键按下去之后立即改变。微小的延迟很难被察觉，但若是更严重的问题就会马上显现，因为屏幕上的被选项目会和你的手指操作不匹配。

Short of switching to a wired keyboard or mouse, there are a few tricks for reducing serious input lag. If you're using an older, 27MHz wireless device, try to keep the distance to the transmitter as little as possible. Operating on the boundaries of that 6-foot range may only pickup a weaker  signal, and be more susceptible to objects that are physically blocking the transmitter's signal. For 2.4GHz or Bluetooth models, ensure that no other devices are operating on the same channel or band, which could also introduce input lag or other unpredictable behaviour. And as always, keep those batteries fresh.

假如没有有线键鼠可供换上，这儿还是有一些小窍门来减少严重的输入延迟。如果你在使用27MHz的老古董无线设备，努力使发收器之间的距离尽可能小。在6英尺的边界操作，可能只会接受到一点微弱的信号，而且更易被物理障碍干扰。对于2.4GHz和蓝牙数据模型，要确保没有其他同频道或者同品牌的设备正在运行，那些东西会造成输入延迟或者其他不可预见的状况。并且必须地，保持电池电量充足。

StickyKeys: turn it off. If you have a decent wireless device, but you're still experiencing issues, software is another potential culprit, as anything that polls or analyzes mouse and keyboard input is capable of introducing lag as well. Mouse acceleration, pointer trails, FilterKeys and even StickyKeys can cause slight delays on some systems, as well as other custom hotkey software, so its worth disabling these if all else fails. And of course, if you're using any custom or proprietary drivers, its worth keeping those updated too.

粘滞键：关闭。如果你有一个相当炫的无线设备，但你还是经历着麻烦，那么软件是潜在的罪犯，因为任何轮询或分析键鼠输入的软件也都有可能造成延迟。鼠标加速、指标轨迹、过滤键、甚至粘滞键在某些系统里会引起轻微延迟，其他的用户热键软件也是如此，所以如果别的招数都不管用，就取消这些应用。当然，如果你在使用用户或专有的驱动城区，要注意保持更新。

Remember, nothing beats a wired keyboard or mouse in terms of latency. Almost all wireless models exhibit some form of input lag, but it's often so small that you'd hardly ever notice. Yet, if input lag ever does rear its ugly head, at least you have options for keeping the problem in check.

记住，在滞后时间方面，没有什么东西能胜出有线键盘鼠标。基本上所有无线数据模型都会显现出某些形式的输入延迟，只是这通常很微小以至于你几乎从未察觉。不过万一要是输入延迟露脸了，你至少有余地控制住问题。

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