Since the October release of the iPhone 4S, everybody was suspicious and curious about the differences between the old gadget and the band new one. If we were to analyze the two devices in detail, few things would be remarked from an exterior perspective.
What surely made the latest version of the iPhone, namely iPhone 4S chuckle over success was the virtual personal assistant Siri. It’s said that Siri had come to the iPhone 4S as to establish the difference between the two devices. After the October release, there was an attempt of integrating the personal assistant to a previous version of the iPhone.
Now sources highlight the fact that Siri can’t be integrated in the iPhone 4 because it does not possess a certain noise cancellation circuitry that is encountered in the iPhone 4S’s A5 CPU.
Apple’s A5 processor includes noise-reduction circuitry licensed from a start-up called Audience, and a chip analyst believes that fact resolves an iPhone 4S mystery and explains why the iPhone 4 lacks the Siri voice-control system.
Audience revealed details of its Apple partnership in January, when it filed paperwork for an initial public offering (IPO) of stock. Teardown work from iFixit and Chipworks revealed a dedicated Audience chip in the iPhone 4, but the iPhone 4S integrates Audience’s “EarSmart” technology directly into the A5 processor, the company’s S-1 filing said.
The details answered a question that Linley Group analyst Linley Gwennap had about the A5 chip that powers the iPhone 4S: why is it so big? Larger processors are more expensive and can consume more power, and chip designers strive to trim every last square millimeter from their designs.