LONDON — India is to complete its switchover from analog to digital broadcast signals by December 2013.J.S. Sarma, chairman of the Telecom Regulatory Authority of India, said Monday the switchover would be phased. TRAI’s final consultation paper on digitization will be released next week. Industry leaders welcomed the move as most were expecting the switchover to happen only by 2017. Vikram Kausik, CEO of DTH provider Tata Sky, said: “Digitization today is inevitable and the scale and potential of the volume of this business in India is huge.” India has more than 130 million TV homes of which 71 million have access to cable TV. The rest are served by analog signals from state broadcaster Doordarshan.