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1. 发明授权

US5907827A Channel synchronized audio data compression and decompression for an in-flight entertainment system 失效
标题翻译：频道同步音频数据压缩和解压缩为一个机上娱乐系统
公开(公告)号：US5907827A
公开(公告)日：1999-05-25
申请号：US787690
申请日：1997-01-23
申请人： Calvin Fang , Clayton Backhaus , Mike Densham , Daniel Lotocky , Kazuo Takata
发明人： Calvin Fang , Clayton Backhaus , Mike Densham , Daniel Lotocky , Kazuo Takata
IPC分类号： H04H20/62 , H04S3/00 , G10L3/02 , H04J3/06
CPC分类号： H04H20/62 , H04S3/00
摘要： In an In-Flight Entertainment System (IFES), an audio distribution system transmits and synchronizes an audio data stream from multiple audio channels using the Adaptive Differential Pulse Code Modulation (ADPCM) technique for efficient transmission and preventing loss of synchronization. An encoder digitizes the analog audio signals, compresses the digital data, generates the synchronization parameters, including synchronization data for a selected channel, and creates a data frame to be transmitted to a number of decoders. Each decoder detects the synchronization header, extracts the compressed data patterns from the passenger selections, updates the ADPCM synchronization parameters, decompresses the compressed data patterns, and converts the digital audio data to analog audio signals to be delivered to the passenger seats.
摘要翻译：在飞行娱乐系统（IFES）中，音频分配系统使用自适应差分脉冲编码调制（ADPCM）技术来传输和同步来自多个音频通道的音频数据流，用于有效传输并防止同步丢失。编码器对模拟音频信号进行数字化，压缩数字数据，产生同步参数，包括所选通道的同步数据，并创建要发送到多个解码器的数据帧。每个解码器检测同步报头，从乘客选择中提取压缩数据模式，更新ADPCM同步参数，对压缩数据模式进行解压缩，并将数字音频数据转换为模拟音频信号以传送到乘客座位。

2. 发明授权

US5939997A Detection method of bus termination 失效
标题翻译：总线终端检测方法
公开(公告)号：US5939997A
公开(公告)日：1999-08-17
申请号：US739874
申请日：1996-10-31
申请人： Kazutoyo Sekine , Daniel Lotocky
发明人： Kazutoyo Sekine , Daniel Lotocky
IPC分类号： G06F13/40 , H04N7/18
CPC分类号： G06F13/4086
摘要： A system for detecting whether a bus used to connect units in an in-flight entertainment system is properly terminated. A detection circuit generates a bus termination signal when a terminating cap properly terminates the bus. Prior to installation of the terminating cap, a bus coupling contact of the detection circuit is maintained in a logic high or asserted state. A detection loop in the terminating cap grounds or deasserts the bus coupling contact when the terminating cap is properly installed. A microcontroller determines whether the bus coupling contact is grounded and signals a managing unit of the condition. The managing unit may display an appropriate error message to notify service personnel of the improper termination.
摘要翻译：用于检测用于连接飞行中娱乐系统中的单元的总线是否正确终止的系统。当终端盖正确终止总线时，检测电路产生总线终端信号。在安装端接盖之前，检测电路的总线耦合触点保持在逻辑高或置位状态。当终端盖正确安装时，端接盖中的检测环路接地或取消对总线耦合触点的断开。微控制器确定总线耦合触点是否接地，并向该管理单元发出信号。管理单元可能会显示适当的错误信息，以通知维修人员不正确的终止。

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