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    • 58. 发明专利
    • Data transmission system and method employing pcm code
    • 数据传输系统和使用PCM代码的方法
    • JP2005223377A
    • 2005-08-18
    • JP2004026357
    • 2004-02-03
    • Nec Access Technica LtdNecアクセステクニカ株式会社
    • SAIKUBO TAKAO
    • H04B14/04H03M13/00H04J3/12H04L29/06H04M11/00H04M11/06
    • H03M13/00H04B14/04H04M11/062H04Q2213/13031H04Q2213/13292
    • PROBLEM TO BE SOLVED: To provide a new data transmission system and a new communication mode switching method not imposing much load on a network by utilizing a PCM code. SOLUTION: A transmission terminal generates a stream comprising the prescribed number of PCM codes whose polarity bit are fixed to "1" and transmits the stream to a reception terminal, and generates a data PCM code stream comprising 8-bit PCM codes the polarity bit of which is fixed to "1" and the remaining 7 bits of which are sequentially assigned to transmission data and transmits the stream to the reception terminal. The reception terminal judges whether or not the polarity bit of each PCM code of the received PCM code stream is "1", counts the number of consecutive PCM codes whose polarity bit is "1", and when the count reaches a prescribed number or over, the reception terminal reconfigures 7-bit data other than the polarity bit of each PCM code in the succeedingly received PCM code stream for received data. COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:提供一种新的数据传输系统和新的通信模式切换方法,而不是通过利用PCM代码对网络施加很大的负担。 解决方案:传输终端生成包含固定为“1”的规定数量的PCM码的流,并将该流发送到接收终端,并生成包含8位PCM码的数据PCM码流 其极性位固定为“1”,其余7位依次分配给发送数据,并将该流发送到接收终端。 接收终端判断接收的PCM码流的每个PCM码的极性位是否为“1”,对极性位为“1”的连续PCM码的数目进行计数,当计数达到规定数量以上 接收终端重新配置除接收数据的随后接收的PCM码流中的每个PCM码的极性位以外的7位数据。 版权所有(C)2005,JPO&NCIPI