目前,众所周知,电缆产业中可以引进数字技术一包括许多重要的业务以及高质量的图像,它对于开展许多交互式应用有着高安全性和大的潜力。当然,在一个现存的电缆系统中引入数字频道是富于挑战性的。与模拟情况不同,数字系统是更软件化的,因此,它需要额外的系统来支持。 It is a well-known fact that the introduction of digital technology into the cable industry, including many important businesses and high-quality images, is known for its high level of security and potential for many interactive applications. Of course, introducing digital channels into an existing cable system can be challenging. Unlike analog, digital systems are softer and therefore require additional systems to support them.