IPTV中间件技术及标准化的探讨 为第三方提供开放的业务开发环境； 为各级运营商提供运营和支撑手段； 便于远程控制和升级； 降低终端研发成本和升级成本。 -IPTV middleware and standardization of technology for a third party to provide an open environment for business development for operators at all levels to provid