发明名称 AUDIO SWITCHING METHOD AND AUDIO SWITCHING DEVICE
摘要 <P>PROBLEM TO BE SOLVED: To provide an audio switching method and audio switching device that seamlessly switches a plurality of audio encoded signals (audio packets) encoded by a plurality of encoder devices respectively. <P>SOLUTION: An AAU conversion section 23 determines an AAU based upon an audio synchronizing signal extracted by an audio synchronizing signal extraction section 22. An audio encoding section 24 encodes audio signals of a digital base band by AAUs divided by an AAU conversion section 23 to generate audio packets. A memory control section 25 temporarily stops reading the memory section 26 once receiving a switching control signal from a host controller based upon a vertical synchronizing signal detected by a video vertical synchronism detection section 21 from a video synchronizing signal to generate a gap for switching, and reads out audio packets left in the memory section 26 at a fast speed and outputs them once receiving a switching control release indication from the host computer. <P>COPYRIGHT: (C)2007,JPO&INPIT
申请公布号 JP2007156203(A) 申请公布日期 2007.06.21
申请号 JP20050352850 申请日期 2005.12.07
申请人 NEC CORP 发明人 IKEDA TOSHIYUKI
分类号 G10L19/02;G10L19/00;H04L1/22;H04L7/00 主分类号 G10L19/02
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