发明名称 Enhanced transmission quality in push-to talk system
摘要 The present invention relates to methods and arrangements to enhance transmission quality in a Push-to-Talk system comprising a sending mobile unit MB1, and a receiving mobile unit MB2 used by a receiving subscriber B. The receiving unit MB2 comprises a Play-Out-Buffer POB and a Repeat Buffer RB, whereby a stream of sequences 15-19,25-29,35-39 is sent from the sending unit MB1 to the receiving unit MB2. The method comprises the following steps:—The incoming stream of sequences 15-19,25-29,35-39 is collected into the Repeat Buffer RB and into the Play-Out-Buffer POB. The Play-Out-Buffer has a storage size and a point for commencing play-out that provides low voice delay, and the Repeat Buffer has a storage size that provides high sound quality. —The incoming stream is played-out from the Play-Out-Buffer POB to the receiving subscriber B. —Replay is commenced of a defined part 36-39 of the sequences 15-19,25-29,35-39 collected in the Repeat Buffer RB.
申请公布号 US7689237(B2) 申请公布日期 2010.03.30
申请号 US20040599850 申请日期 2004.04.15
申请人 TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) 发明人 SAGFORS MATS FREDRIK
分类号 H04B7/00;H04L1/18;H04W88/02 主分类号 H04B7/00
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