METHOD AND APPARATUS FOR SETTING A VOLTAGE CONTROLLED CRYSTAL OSCILLATOR IN A VIDEO PROCESSING DEVICE
摘要
The present invention concerns a method and apparatus for setting a frequency reference in an integrated receiver decoder (IRD). More specifically, the present invention discloses an electrical circuit arrangement in which the voltage controlled crystal oscillator (VCXO) is set to oscillate at the desired frequency prior to the initial use thereof and that frequency is stored in a non-volatile memory unit. Upon initial use, the IRD receives a data signal corresponding to a frequency reference. The IRD uses a threshold value to compare the frequency reference of the incoming data signal with the frequency stored in the non-volatile memory. If the frequencies differ by a predetermined value, the frequency from the incoming data signal is stored in the non-volatile memory and is used to set the VCXO.
申请公布号
WO2005084037(A3)
申请公布日期
2005.11.10
申请号
WO2005US06252
申请日期
2005.02.25
申请人
THOMSON LICENSING S.A.;SIRILLA, GEORGE, ANDREW;PITSCH, ROBERT, ALAN