感受数字消费类电子产品市场世界彩色电视机市场估计约1.2亿台，但随着电视广播的数字化，未来必然是数字电视时代。美国1998年11月开始地面波广播，以ABC、CBS、NBC、FOX 4大网络为中心向全国推广。目前美国一台内置STB的36英寸数字电视，售价5000美元，64英寸投影电视更高达9 Experience the digital consumer electronics market The world color television market is estimated to be about 120 million units, but with the digitization of television broadcasting, the future will inevitably be the era of digital television. In the United States, ground wave broadcasting began in November 1998 and was promoted nationwide centered on the ABC, CBS, NBC, and FOX 4 networks. At present, a US-built 36-inch digital TV with an STB is priced at US$5,000, and a 64-inch projection TV is as much as 9