Sony has joined several tech giants rumored to develop a larger tablet, with this one expected to make its way to customers in the early half of 2015.

Sources with knowledge of the situation said mass production for the 12-inch tablet will begin shortly, and that the high-end engagement will most likely be the main target for the device, which might be priced at over US$1,000, according to Digitimes.

While Sony hasn't been involved in the PC market for quite some time, the Japanese tech giant is still focused on improving its line of tablets, the sources said. They also believe Pegatron Technology, which manufactured Apple's iPad and Microsoft's Surface tablets, will be responsible for doing the same for Sony's tablets.

Pegatron declined to comment on the companies it works with.

Features expected for the 8.6-mm thick, 12-inch tablet include a 3840 x 2400 resolution for the display, a Qualcomm processor and an 8-megapixel camera, BGR reported. The sources also believe more vendors will release large-sized tablets in 2015, but they didn't name any of these vendors.

The rumor puts Sony in competition with Samsung and Apple, who have also been reported to be working on a larger tablet.