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    • 6. 发明授权
    • Method and apparatus for transmitting voice information
    • 用于传输语音信息的方法和装置
    • US06671518B2
    • 2003-12-30
    • US10295123
    • 2002-11-15
    • John M. HarrisTyler A. BrownLee M. ProctorRobert D. Battin
    • John M. HarrisTyler A. BrownLee M. ProctorRobert D. Battin
    • H04B700
    • H04W4/10H04L1/0061H04L1/0065H04L1/007H04L1/0083H04L1/0089H04L1/08H04W76/45
    • A typical radio frame (300) comprises A, B, and C vocoded bits (304). At the end of each frame (300) A and B bits (305) are inserted from a previous frame. Thus, each frame not only comprises A, B, and C bits (304) for that frame, but also comprises those A and B bits (305) originally transmitted in a prior frame. Thus, each frame comprises high and low priority vocoded bits (304) from the current vocoder frame, and those higher priority bits from a preceding frame (305). By placing an inner CRC (302, 303) around the most important bits of the vocoded frame, even though a frame is erased (e.g. its outer CRC (301) failed) it can still be verified that the most important bits in the vocoded frame are correct. Since the class B and C bits can tolerate some errors, the vocoded frame can then play out if its inner CRC passes.
    • 典型的无线帧(300)包括A,B和C语音编码比特(304)。 在每个帧(300)的末尾,从前一帧插入A和B比特(305)。 因此,每个帧不仅包括用于该帧的A,B和C比特(304),而且包括原来在先前帧中发送的那些A和B比特(305)。 因此,每个帧包括来自当前声码器帧的高优先级和低优先级的声码比特(304),以及来自前一帧(305)的那些较高优先级比特。 通过在声码帧的最重要位周围放置内部CRC(302,303),即使帧被擦除(例如,其外部CRC(301)失败),仍然可以验证在声码帧中最重要的位 是正确的。 由于类B和C位可以容忍一些错误,所以如果其内部CRC通过,则声码帧可以播放。
    • 9. 发明授权
    • Method and apparatus for packet alignment in a communication system
    • 通信系统中数据包对准的方法和装置
    • US5586119A
    • 1996-12-17
    • US298916
    • 1994-08-31
    • Gino A. ScribanoLee M. ProctorQuoc V. Nguyen
    • Gino A. ScribanoLee M. ProctorQuoc V. Nguyen
    • H04B7/06H04B7/216H04H20/67H04J3/06H04Q11/04H04W36/18H04J3/24
    • H04H20/67H04J3/0664H04W36/18
    • A method and apparatus for packet alignment in a simulcast system includes a communications controller (310) having a vocoder and an input/output (I/O) processor (313) controlling the vocoder (311), the I/O processor having a timing alignment control (315) and a packet counter (314) for inserting timing alignment tags in voice/data packets and adjusting packet numbering and timing based on alignment requests from a master radio communication unit. The communications controller is coupled to radio communication units (330, 340, 350), each having a packet buffer (331) and an alignment processor (332) which includes a packet number detector (333) for detecting the transmission timing tag and sending a request for a packet numbering adjustment to the communications controller and a timing alignment detector (334) for comparing a receive time of the first information packet and a predetermined preferential receive time and for sending a timing alignment request to the communications controller.
    • 一种在同时播送系统中用于分组对准的方法和装置包括具有声码器和控制声码器(311)的输入/输出(I / O)处理器(313)的通信控制器(310),所述I / O处理器具有定时 对准控制(315)和分组计数器(314),用于在语音/数据分组中插入定时对准标签,并且基于来自主无线电通信单元的对准请求来调整分组编号和定时。 通信控制器耦合到无线电通信单元(330,340,350),每个无线电通信单元具有分组缓冲器(331)和对准处理器(332),该对准处理器包括用于检测传输定时标签的分组号检测器(333) 请求对通信控制器的分组编号调整,以及定时对准检测器(334),用于比较第一信息分组的接收时间和预定的优先接收时间,并用于向通信控制器发送定时对准请求。