Additional reports concerning Apple’s “iTV” HDTV have surfaced, adding a few additional details to the news distributed on Tuesday claiming that Samsung will provide the SoC — possibly the A5 which powers the iPhone 4S and iPad 2 — and that Sharp will provide the actual display. Tuesday’s report also said that Apple’s iTV will likely launch in 2Q12 or 3Q12, but now sources are claiming that the device won’t be rolled out until the end of 2012.

According to sources, Apple is entertaining bids from Taiwan Semiconductor Manufacturing Company (TSMC), Advanced Semiconductor Engineering (ASE) and Siliconware Precision Industries (SPIL) to produce the HDTV components. Foxconn Electronics (Hon Hai Precision Industry) will likely obtain the assembly orders — this is the company that handles most of Apple’s manufacturing requirements. Apple will presumably place orders for the customized chips and other components directly with its contract manufacturers similar to the way it orders parts for its iPad and iPhone models.

Unfortunately, hardware standards aren’t expected to be finalized until the end of 2Q12, thus canceling out previous reports of a mid-2012 release. As reported on Tuesday, the iTV will measure 32- and 37-inches and will reportedly use Siri to provide “the simplest user interface you could imagine.” Little else is known in regards to the HDTV’s physical specs, and so far Apple hasn’t officially acknowledged that the device even exists.

Just last week Apple execs were reportedly meeting with media execs at several large companies to stream content onto the rumored Siri-powered HDTV. Apple essentially wants users to be able to start a movie or TV episode on one Apple device and continue on with another. The talks reportedly outline ways Siri and/or iOS could recognize users across multiple devices: phones, tablets and TVs.

Rumors of an Apple HDTV have been around for quite some time, but have lately gone into overdrive thanks to comments made by Steve Jobs in his biography. Since then, reports from Apple’s supply chain have seemingly been streaming in at a steady pace.