television band

简明释义

电视频带

英英释义

例句

1.Many modern TVs are equipped to handle multiple frequencies within the television band.

许多现代电视机能够处理电视频段内的多个频率。

2.The new satellite dish can pick up signals from a wider range of the television band.

新的卫星天线可以接收更广泛的电视频段信号。

3.Interference can occur if devices operate on the same frequency as the television band.

如果设备在与电视频段相同的频率上运行，可能会发生干扰。

4.Technicians often analyze the television band to ensure optimal signal quality.

技术人员经常分析电视频段以确保最佳信号质量。

5.The television band is crucial for broadcasting channels in your area.

电视频段对您所在地区的频道广播至关重要。

作文

The concept of the television band is essential in understanding how television signals are transmitted and received. In essence, the television band refers to a specific range of frequencies allocated for television broadcasting. This range allows for the effective transmission of audio and video signals to televisions, enabling viewers to experience their favorite shows, news broadcasts, and movies. Historically, the television band was divided into different segments, primarily the VHF (Very High Frequency) and UHF (Ultra High Frequency) bands. The VHF band typically ranges from 30 MHz to 300 MHz, while the UHF band spans from 300 MHz to 3 GHz. Each of these bands is further divided into channels, which are assigned to various television stations. For instance, in the United States, channels 2 through 13 fall within the VHF band, whereas channels 14 through 69 are part of the UHF band.The allocation of the television band is crucial for preventing interference between different broadcasting stations. When multiple stations operate on the same frequency, it can lead to poor reception and distorted images. To mitigate this issue, regulatory bodies like the Federal Communications Commission (FCC) in the United States oversee the distribution of frequencies, ensuring that each station has a unique channel within the television band. This careful management allows for a smooth viewing experience for audiences.With the advent of digital broadcasting, the use of the television band has evolved significantly. Digital signals offer better quality and more channels than traditional analog signals. As a result, many countries have transitioned from analog to digital broadcasting, freeing up portions of the television band for other uses, such as wireless communication and internet services. This shift has allowed for more efficient use of the spectrum, accommodating the growing demand for wireless technology.In addition to traditional broadcasting, the television band also plays a role in cable and satellite television. These services utilize the same frequency ranges but transmit signals through cables or satellites instead of over the air. This method allows for a more extensive selection of channels and often includes premium content that may not be available through regular broadcasting. However, the fundamental principles of the television band remain the same, as these services still rely on the allocated frequencies to deliver their content to viewers.As technology continues to advance, the future of the television band remains a topic of discussion among industry experts. With the rise of streaming services and on-demand content, some speculate that traditional broadcasting may become less relevant. However, the television band will likely continue to play a vital role in delivering live events, news, and other programming that requires real-time broadcasting.In conclusion, understanding the television band is crucial for anyone interested in the world of television. It encompasses the frequencies used for broadcasting, the regulations governing their use, and the technological advancements that shape the way we consume media. As we move forward, the television band will undoubtedly adapt to meet the changing needs of viewers, ensuring that we continue to enjoy the rich tapestry of content that television has to offer.

理解电视波段的概念对于了解电视信号的传输和接收至关重要。实际上，电视波段指的是分配给电视广播的特定频率范围。这个范围允许音频和视频信号有效地传输到电视上，使观众能够体验他们最喜欢的节目、新闻广播和电影。历史上，电视波段被划分为不同的部分，主要是VHF（甚高频）和UHF（超高频）波段。VHF波段通常范围从30 MHz到300 MHz，而UHF波段则从300 MHz到3 GHz。每个波段进一步细分为频道，这些频道被分配给各种电视台。例如，在美国，频道2到13属于VHF波段，而频道14到69则属于UHF波段。对电视波段的分配对于防止不同广播电台之间的干扰至关重要。当多个电台在同一频率上运行时，可能会导致接收不良和图像失真。为了减轻这个问题，像美国联邦通信委员会（FCC）这样的监管机构负责监督频率的分配，确保每个电台在电视波段内都有一个独特的频道。这种精心管理使观众能够顺利观看。随着数字广播的出现，电视波段的使用发生了显著变化。数字信号提供比传统模拟信号更好的质量和更多的频道。因此，许多国家已经从模拟广播转向数字广播，释放了电视波段的一部分用于其他用途，例如无线通信和互联网服务。这一转变使得频谱的使用更加高效，以满足对无线技术日益增长的需求。除了传统广播外，电视波段在有线和卫星电视中也发挥着作用。这些服务利用相同的频率范围，但通过电缆或卫星而不是通过空气传输信号。这种方法允许更广泛的频道选择，通常包括通过常规广播可能无法获得的优质内容。然而，电视波段的基本原则仍然相同，因为这些服务仍然依赖于分配的频率将内容传递给观众。随着技术的不断进步，电视波段的未来仍然是行业专家讨论的话题。随着流媒体服务和按需内容的兴起，一些人认为传统广播可能会变得不那么相关。然而，电视波段可能会继续在实时广播新闻、事件和其他节目中发挥重要作用。总之，理解电视波段对于任何对电视世界感兴趣的人来说都是至关重要的。它包含了广播使用的频率、管理其使用的法规以及塑造我们消费媒体方式的技术进步。随着我们向前发展，电视波段无疑会适应观众不断变化的需求，确保我们继续享受电视所提供的丰富内容。