Tech guidance roundup: 1) OmniVision (OVTI - earnings) expects FQ4 revenue of $300M-$330M and EPS of $0.14-$0.29, below a consensus of $371.4M and $0.32. 2) Youku (YOKU - earnings) expects Q1 revenue of RMB480M-RMB520M ($77.2M-$83.6M), below a consensus of RMB551.3M ($88.6M). 3) Splunk (SPLK - earnings) expects FQ1 revenue of $52M-$54M, largely above a $52M consensus. FY14 (ends Jan. '14) guidance is for revenue of $260M-$270M vs. a $263.2M consensus. OVTI -9.2% AH. YOKU -16.1%. SPLK +4.8%.