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Report from Digital Video Broadcasting

机译：数字视频广播的报告

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One of the inherent problems with setting standards for digital television (TV) is that it involves freezing the choice of technologies at a specific point in time. Some promising technologies may have to be excluded because they are immature or not yet proven, while others are simply too demanding (e.g., in terms of processing power or memory requirements) to be included in mass-market products. A few years later, these “promising” technologies may have become commonplace, but consumers would not be happy throwing away millions of “perfectly good” TV sets if the broadcasters decided to replace the “old” standard for digital TV with a “new and better” standard. One solution to this dilemma is to ensure that any new standard is backward-compatible with the previous standard, as typified by the addition of color to monochrome TV. However, the requirement of backward-compatibility is a very severe constraint on the performance of new standards
机译：制定数字电视（TV）标准的固有问题之一是，它涉及在特定时间冻结技术的选择。某些有前途的技术可能会被排除在外，因为它们还不成熟或尚未得到证明，而另一些技术则太过苛刻（例如，在处理能力或内存要求方面），无法包含在大众市场产品中。几年后，这些“有前途的”技术可能已变得司空见惯，但如果广播公司决定用“新的和新的”替代数字电视的“旧”标准，那么消费者将不愿意丢弃数百万台“完美无缺”的电视机。更好”的标准。解决这一难题的一种方法是确保任何新标准都与以前的标准向后兼容，以向单色电视中添加彩色为代表。但是，向后兼容的要求对新标准的执行是非常严格的约束

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