Cannon Group said it had terminated negotiations to acquire the assets of DeLaurentiis Entertainment Group . . . New World Entertainment announced that its board has approved a previously announced agreement in principle for Pathe Entertainment to acquire New World . . . Aaron Spelling Productions completed a merger with Worldvision Enterprises and Laurel Entertainment . . . Semi-Tech Microelectronics (Far East) Ltd. increased its tender offer for SSMC, maker of Singer sewing machines, to $34 a share from $30.