Audio systems using a digital audio interface between a sender and a receiver are known. Due to the digital revolution it is very easy to make copies of copyright protected work. Proposed is to use a bi-directional control bus in the audio interface. In this way it is made possible to send to "normal" receivers audio with a standard quality and to receivers which have been allowed to receive higher quality audio.
申请公布号
WO0036758(A1)
申请公布日期
2000.06.22
申请号
WO1999EP09826
申请日期
1999.12.13
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;LOKHOFF, GERARDUS, C., P.