Swedish telecom equipment maker Ericsson and Japan's electronics giant Sony will expand their cooperation beyond cell phones to mobile and broadband TV, according to an Ericsson official.

Per Nordlof, Ericsson's director of product strategy and portfolio management, said the companies will together develop software to link their products through wireless networks.

"There is a strong confidence between Ericsson and Sony after the success of the handset business and we will work to develop software that connects the gadgets in the homes with the outer world," he said at a news conference today.

"We see a mass market for mobile TV within two years," Nordlof added, defining a mass market as 30 per cent of users regularly watching television on their cell phones.