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公开(公告)号:US4550400A
公开(公告)日:1985-10-29
申请号:US511612
申请日:1983-07-07
摘要: The remote digital volume control system (10) as used in an audio control apparatus comprising at least one multidigital/audio slot bus (12) which is coupled to base stations through interfaces (21-24). Console interfacing circuits (38) are coupled to the bus (12) and a plurality of remote consoles (30) each with channel control panels (32) coupled to the interfacing circuits (38). The system (10) comprises channel control modules (102) and shared A/D circuitry (150) including two comparators (152, 153) and an up/down counter (154) for generating a four-bit word for each volume control setting of each channel control module (102). The remoted interfacing circuits (38) coupled to said bus include a RAM (180) for storing volume level information for each channel control module (102) and routing information, and a timing control circuit (182) for routing information from the respective digital/audio slots on the bus (12) to audio line driver circuits (71-74) in the consoles (30). The remoted interfacing circuits (38) are controlled by the RAM (180), the timing control circuit (182), and a microprocessor (36) which cause appropriate digital/audio slot information to be converted to an analog signal, muted to the desired level, and routed to a desired audio line driver circuit (71-74) coupled to a speaker (91-94) in a desired console (30).
摘要翻译: 在音频控制装置中使用的远程数字音量控制系统(10)包括至少一个多数字/音频时隙总线(12),其通过接口(21-24)耦合到基站。 控制台接口电路(38)耦合到总线(12)和多个遥控控制台(30),每个遥控控制台具有耦合到接口电路(38)的通道控制面板(32)。 系统(10)包括信道控制模块(102)和共享A / D电路(150),其包括两个比较器(152,153)和用于为每个音量控制设置产生四位字的升/降计数器(154) 的每个通道控制模块(102)。 耦合到所述总线的远程接口电路(38)包括用于存储每个信道控制模块(102)的音量级别信息的RAM(180)和路由信息,以及用于从相应的数字/ 总线(12)上的音频插槽到控制台(30)中的音频线路驱动器电路(71-74)。 遥控接口电路(38)由RAM(180),定时控制电路(182)和微处理器(36)控制,微处理器(36)将适当的数字/音频时隙信息转换成模拟信号, 并且被路由到耦合到期望的控制台(30)中的扬声器(91-94)的所需音频线路驱动器电路(71-74)。