NDTV was back on air on Monday with the simultaneous launch of its round-the-clock English and Hindi news channels -  NDTV 24x7 and NDTV India.

Two weeks after its contract ended with Star, NDTV now joins the race with private news channels, including Aaj Tak, Zee, Sahara and Star.

Though the content in NDTV's Hindi and English channels varied a little, both went on air at 1400 IST.

NDTV president Prannoy Roy said Rs 10-12 crore (Rs 100-120 million) of advertising has already been tied up for these two channels, which will be available in about 12 million cable homes. NDTV has tied up with Sony Discovery's One Alliance for distribution.