CALGARY and EDMONTON - CBC broadcasts on its Calgary and Edmonton affiliates shift to high definition starting Friday, the ‘pubcaster said.Viewers in the two Alberta centres will be able to watch HD CBC programs on Shaw Cable channel 209 starting April 1st, while Telus TV subscribers will have access on May 27 through channel 600 in Calgary and channel 621 in Edmonton.“With Calgary and Edmonton as Canada’s third and fourth largest English TV markets respectively, we’re really pleased to be adding these important members to Canada’s CBC HD family,” said Alan Dark, CBC’s executive director of media sales and marketing,...