第0511章 录像带格式大战的天平
最新网址:m.ltxsdz.com
“你们只是站在常规角度上考虑,我却有更深一层的忧虑。龙腾小说ltxsba.com???笔趣阁???w?w?w?.?b?i?q?”心中挣扎了好一会的山内博,最后摇了摇头,“夏普不是推出了一款彩色电视机,号称和二代小霸王游戏机搭配在一起后,可以提供比其它同类产品更优秀的娱乐体验嘛,这可并非虚言啊。”
说到这里,山内博叫来秘书,吩咐了一番,很快一台夏普彩色电视机和二代小霸王游戏机被搬了进来。
“要不是横井军平他们提醒,我还不会意识到,二代小霸王游戏机这种新产品,很有可能倒逼着电视机产业生变化。”山内博指着二代小霸王游戏机和夏普电视机之间的连接线说道。
……
索尼公司总部,盛田昭夫和大贺典雄面前,也摆着一套夏普电视机和二代小霸王游戏机的组合,另外还有一套夏普电视机和爱普生录像机的组合。
“在技术应用层面,我们似乎有些落后了。”盛田昭夫苦笑着放下了手里的遥控器。
做为终端,电视机也在随着整个电视节目系统不断展前进着,比如节目信号数据从模拟复合到模拟分量的转变。
黑白电视机显示画面基于亮度的灰阶,到了彩色电视机,则展出了名为yuV的颜色编码方法。
其中,“y”表示亮度,“u”和“V”则是色度、浓度。
如果忽略“u”和“V”,那么剩下的“y”信号就跟之前的黑白电视信号相同,即做到了彩色电视机对黑白电视机的兼容。
当前,不同于电视台的录像机、家用电视游戏机,怎么向电视机传输自己的节目数据呢?主要靠的是一个叫做RF调变器——射频调变器的装置。
简而言之就是,让电视机通过一个空白频道,像收看普通电视台节目那样,接收此类信号。
这个特殊频道,在北美地区为第3或第4频道,频率在66至72mhz之间;欧洲地区为36频道;日本地区为第1或第2频道。频率在9o至1o2mhz之间;宝岛地区则为第13频道,频率在21o至216mhz之间。
RF调变器通常以外接盒的形式存在,为的就是避免其电波影响电视机的正常运作。
不过,RF调变器将复合信号进行调变。再让电视机解调,其结果无法避免地引入了更多的噪声,使得画质有损。
为了解决这个问题,爱普生录像机、二代小霸王游戏机和夏普电视机之间,提供直接线缆相连的a_V端子。将此类娱乐电器的节目数据信号与天线或有线电视所送的RF信号分开处理,从而大大改变了画面质量。
至于RF调变器,则可以走进历史了。
当然了,a_V端子并非最完美的解决方法。盖因它虽然避免了RF调变器所造成的信号有损,但当前所使用的模拟复合信号,其本身将yuV信号混合在一起的设计,就在根子上造成了画质上的减损。
最有效的解决之道,当然是进行从模拟复合、模拟分量到数字复合、数字分量的技术变革。
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