Updated from Jan. 20Digital delivery outfit Harmonic ( HLIT) said fourth-quarter earnings expanded roughly eight-fold from last year, blowing away analyst estimates. The stock surged $1, or 10.3%, to $10.75 Friday morning. The Sunnyvale, Calif., tech shop earned $10.2 million, or 14 cents a share, in the three months to Dec. 31, up from earnings of $1.4 million, or 2 cents a share, last year. Revenue rose 55% from a year ago to $85.6 million. The company cited strong sales for digital head-end systems for simulcasting in the quarter. Excluding various items, the company earned $12.7 million, or 17 cents a share, in the latest quarter, compared with $1.2 million, or 2 cents a diluted share, a year ago. On that basis, analysts had been forecasting earnings of 13 cents a share on revenue of about $79 million. The company expects pro forma earnings of 7 cents to 11 cents a share on revenue of $70 million to $75 million in the first quarter of 2005, both well above analyst forecasts.