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美国国家广播协会(NAB)在四月中旬举行了1981年技术会议.会议期间同时展出了约442家会员公司的产品,占地面积为三十五万平方英尺,可接纳两万人参观.技术会议分为电视管理、无线电管理和工程组三个部分. 对电视来说,今年的重点是微处理机的应用.很多展出设备如摄象机、照明设备、数字录象机、数字特技开关等都使用微处理机控制.还展出了字符显示用户电报(Teletext)、有线电视、卫星电视以及调幅立体声等设备. 会议还发展了一部分技术文件.在无线电技术方面有音频录音与广播、音频开关系统、无线电节目自动
The National Association of Broadcasters (NAB) held a technical conference in mid-April of 1981. During the conference, about 442 member companies were also exhibited, covering an area of 350,000 square feet and capable of accommodating 20,000 visitors. Technology conference is divided into three parts: TV management, radio management and engineering group. For television, this year’s focus is on the application of microprocessors. Many of the exhibition equipment such as video cameras, lighting equipment, digital video recorders, digital effects Switches and so on are all controlled by microprocessors, Teletext, cable TV, satellite TV and amplitude modulation stereo are also displayed on the display. Some technical documents have also been developed. There are audio recording and broadcasting in radio technology, Audio switching system, radio program automatically