VIDIA 今天在 CES 2013 上正式發表了全新的 Tegra 4 處理器，這款產品採用了和 Tegra 3 同樣的「四加一」設計（四顆 CPU 核心加上第五顆省電 CPU 核心），配有 72 顆 GeForce GPU 核心，使用 28nm 製程，據稱在顯示效能方面是 Tegra 3 的六倍。同時它還是第一款使用了 Cortex-A15 架構的四核心處理器，而且還支援 LTE 網路。按照 NVIDIA 的說法 Tegra 4 是目前世界上最快的行動處理器，在現場他們還用 Tegra 4 產品和 Nexus 10 比拼了一下打開網頁的速度，結果不言而喻，自然是 Tegra 更勝一籌啦。
此外這款處理器還使用了全新的拍攝運算架構（computational photography architecture），增加了全新的圖形處理引擎，和現有平台相比在圖形運算速度方面提升了十倍（在現場 NVIDIA 向我們演示了 Tegra 4 是如何在 HDR 效果全時開啓的狀態下處理影片的）。同時 Tegra 4 還支援在連拍模式和 LED 補光燈打開的情況下使用 HDR，NVIDIA 稱其最終目的是要讓行動拍攝變得比 DSLR 更強。
NVIDIA Introduces World's Fastest Mobile Processor
Tegra 4 Features 72 Custom GPU Cores, Quad-Core Cortex-A15 CPU for Superb Performance and Efficiency; LTE Enabled with Optional Chipset
LAS VEGAS-CES-Jan. 6, 2013-NVIDIA today introduced NVIDIA® Tegra® 4 , the world's fastest mobile processor, with record-setting performance and battery life to flawlessly power smartphones and tablets, gaming devices, auto infotainment and navigation systems, and PCs.
Tegra 4 offers exceptional graphics processing, with lightning-fast web browsing, stunning visuals and new camera capabilities through computational photography.
Previously codenamed "Wayne," Tegra 4 features 72 custom NVIDIA GeForce™ GPU cores – or six times the GPU horsepower of Tegra 3 – which deliver more realistic gaming experiences and higher resolution displays. It includes the first quad-core application of ARM's most advanced CPU core, the Cortex-A15, which delivers 2.6x faster web browsing and breakthrough performance for apps.
Tegra 4 also enables worldwide 4G LTE voice and data support through an optional chipset, the fifth-generation NVIDIA Icera® i500 processor. More efficient and 40 percent the size of conventional modems, i500 delivers four times the processing capability of its predecessor.
"Tegra 4 provides enormous processing power and efficiency to power smartphones and tablets, gaming devices, auto systems and PCs," said Phil Carmack, senior vice president of the Tegra business at NVIDIA. "Its new capabilities, particularly in the area of computational photography, will help improve a whole range of existing products and lead to the creation of exciting new ones."
Computational Photography Capability
Among the Tegra 4 processor's breakthroughs is its Computational Photography Architecture, which automatically delivers high dynamic range (HDR) photos and video by fusing together the processing power of the GPU, CPU and the camera's image-signal processor.
Its HDR capability captures images, including those taken with a flash, the way they are seen by the human eye – with detail in both bright and dark areas.
Unprecedented Power Efficiency
Designed for maximum energy efficiency, Tegra 4 includes a second-generation battery saver core for low power during standard use, and PRISM 2 Display technology to reduce backlight power while delivering superior visuals.
Tegra 4 consumes up to 45 percent less power than its predecessor, Tegra 3, in common use cases. And it enables up to 14 hours of HD video playback on phones.
Tegra 4 Key Features
· - GeForce GPU with 72 custom cores
· - Quad-core ARM Cortex-A15 CPU, plus a 2nd Generation Battery Saver Core
· - Computational Photography Architecture
· - LTE capability with optional Icera i500 chipset
· - 4K ultra-high-def video support
資料來源:http://chinese.engadget.com
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