About the most complete information summary of Oculus VR one machine
At the Oculus Connect 3 Developer Conference held just recently, Facebook announced a product that was somewhat unexpected: a Rift virtual reality headset that can be used independently.
Facebook CEO Zuckerberg introduced the new head-mounted device code named Santa Cruz at the conference. As a virtual reality enthusiast, it is necessary to understand this Santa Cruz. After all, This is a new product that is very different from the Oculus Rift, and let's take a look at what we know so far about the new news from Santa Cruz.
What is Santa Cruz
Santa Cruz is a new virtual reality headset developed by Oculus and is currently in prototype development.
The most interesting aspect of Santa Cruz is that it is a stand-alone helmet, which means that it is similar to Microsoft's HoloLens in wireless mode. Santa Cruz's goal may seem quite ambitious. Unlike the Oculus Rift, the Santa Cruz is not tied to computers and cables, providing a fully mobile virtual reality experience. We can walk and move freely with Santa Cruz.
How does Santa Cruz work
6 degrees of freedom tracking
Santa Cruz can basically be seen as a "wireless" version of the Oculus Rift, and according to TomsHardware's introduction, Santa Cruz provides 6 degrees of freedom for tracking and positioning, while the current Gear VR mobile helmet only provides 3 degrees of freedom positioning . With the positioning of 6DoF, we can respond in a virtual environment based on our body movements.
Built-in computing system
Although the Santa Cruz doesn't look much different from the Oculus Rift in appearance, it has a built-in stand-alone computing system. It also has three USB ports (two of which are USB 3.0) and an HDMI port. Of course, it is built-in. rechargeable battery.
Tracking from the inside out
Santa Cruz is not equipped with an external sensor. Instead, it uses an internal tracking method. Santa Cruz is equipped with four cameras, both facing the ceiling and facing the ground. It is not yet clear what the specific resolution of the camera is. Max Cohen, head of Oculus's mobile division, said: "In theory, users do not need to make any settings, just wear a helmet and they can use it in a suitable environment."
At the same time, Oculus did not publicly announce the specific ways Santa Cruz traced from the inside out, but only through four fisheye cameras and specialized software, Oculus said that Santa Cruz can provide an experience comparable to Oculus Rift, while still wireless.
Zuckerberg also stated that the tracking from the inside to the outside and the tracking from the outside to the inside are different for the sensors. Like the Oculus Rift uses outside-in tracking, it is usually limited by physical equipment. Santa Cruz's internal and external tracking can be completely independent of external hardware. All trace data processing takes place inside the headset.
Zuckerberg believes that tracking from the inside is actually one of the most difficult problems in computer science.
Magical software
We assume that Santa Cruz's camera can provide some data, that is, through the connection between the built-in computational processing unit and the HDMI interface, and then there is also a system built in Santa Cruz that also plays a large role. Some people think that Santa Cruz is using an Android system and uses this system to perform processing of data to realize the magic of virtual reality technology.
The most critical feature of Santa Cruz is the optimization of the location tracking effect through the new computer data system. Obviously, there are still many unknown and unsolved problems, including the ability of the prototype to accurately process data. In the future, Oculus will slowly announce more progress reports on the development of Santa Cruz over time.
experience feelings
Obviously, those who have experienced Santa Cruz have said that its weight, even if it has a built-in battery, is not obvious. In the Demo demo, in the virtual reality world we watch reports of our own hands, arms and feet, but competitors like HTC Vive can not only see both hands, but also provide translucent boundary walls when we are too A reminder can be given when approaching the edge of the room.
After many people have experienced it, the accuracy and stability of Santa Cruz tracking are very good. Whether it's walking around in the room, or jumping and crouching, it can be well captured. The picture is almost jitter free. In addition, when there are obstacles in front of the action, Santa Cruz will display blue grid lines like HTC Vive to remind the user of the action. ,
However, it should be noted that there is no window or mirror in the experience space. So even though this space is set up as an ordinary person's room, we have no way of understanding the possible effects of glass or mirrors, because glass reflection and direct sunlight are the universal challenges faced by the tracking system (whether it is inside or outside or inside ).
Overall, Santa Cruz is still in an early stage of development, but it looks promising in the future. People interested in virtual reality devices should continue to pay attention.
Difference with Gear VR
Santa Cruz is certainly not the same as Samsung Gear VR. Gear VR is a relatively primitive virtual reality device that relies on the display and processing capabilities of smartphones. The Santa Cruz is a complete set of virtual reality systems, just like the Oculus Rift, but without the shackles of cables, it also provides a 6DoF tracking system.
Time to market
Currently Santa Cruz is still in the development phase of a prototype, so it is still not known when it will push the retail version. However, before the retail version, many developers will take the lead to get Santa Cruz for experience and app development research.
How much is the price
Currently Oculus VR does not have a plan to sell Santa Cruz, so no one knows how much money will be sold when the future Santa Cruz retail version actually comes out. However, we can use other products for reference.
For example, the Oculus Rift is priced at $599 (about 4030 yuan), the Oculus Touch controller is priced at 199 US dollars (about 1338 yuan), and the additional camera tracker is priced at 79 US dollars (about renminbi 530 yuan).
The HTC Vive sells for $799 (about 5375 yuan) and already includes two hand-held trackers and Lighthouse trackers.
to sum up
Although Santa Cruz is still only a prototype stage, since Oculus decided to present the prototype now, it means that wireless virtual reality plays an important role in the planning of Facebook's future virtual reality. From the current situation, it is indeed full of expectations.
What is Car Ethernet
Car Ethernet is a new local area network technology that uses Ethernet to connect the electronic unit in the car. Unlike traditional Ethernet, which uses 4 unshielded twisted pair cables, car Ethernet can achieve a transmission rate of 100Mbit/s or even 1Gbit/s on a single pair of unshielded twisted pair cables. At the same time, it also meets the requirements of the automotive industry for high reliability, low electromagnetic radiation, low power consumption, bandwidth allocation, low latency and synchronous real-time. The physical layer of on-board Ethernet uses BroadRReach technology, and BroadR-Reach's physical layer (PHY) technology has been standardized by the One-pair Ethernet Alliance (OPEN). Therefore, it is sometimes called Broad RReach (BRR) or OABR (Open Alliance BroadR-Reach). The MAC layer of vehicle Ethernet adopts the IEEE 802.3 interface standard and seamlessly supports widely used high-level network protocols (such as TCP/IP) without any adaptation.
On-board Ethernet protocol architecture
Vehicle-borne Ethernet and its supported upper-layer protocol architecture are shown in Figure 1. Vehicle-borne Ethernet mainly involves OSI layer 1 and Layer 2 technologies, while vehicle-borne Ethernet also supports AVB, TCP/IP, DOIP, SOME/IP and other protocols or application forms.
On-board Ethernet framework
Among them, AVB is an extension of traditional Ethernet functions, which enhances the real-time performance of traditional Ethernet audio and video transmission by adding precise clock synchronization, bandwidth reservation and other protocols, and is a network audio and video real-time transmission technology with great development potential. SOME/IP (Scalable Service-Oriented MiddlewarE on IP) specifies the video communication interface requirements for vehicle camera applications, which can be applied to the field of vehicle cameras, and realizes the mode control of driver assistance cameras through apis.
As an extension of AVB protocol, Time-Sensitive Networking (TSN) introduces related technologies of time-triggered Ethernet, which can efficiently realize the transmission of automotive control information. In addition, the on-board Ethernet of the 1Gbit communication standard also supports Power Over Ethernet (POE) function and Energy-Efficient Ethernet (EEE) function. The POE function provides power for connected terminal devices while transmitting data through twisted pair cables, eliminating the need to connect external power cables to terminals and reducing the complexity of power supply.
On-board Ethernet standardization
In terms of in-vehicle Ethernet standardization, the IEEE802.3 and IEEE802.1 working groups, AUTOSAR, the OPEN Alliance and the AVnu Alliance have played a major role in promoting it.
The IEEE802.3 local area network standard represents the mainstream Ethernet standard in the industry, and the on-board Ethernet technology is developed on the basis of IEEE802.3, so the IEEE is currently the most important international standardization body for on-board Ethernet. In order to meet the requirements of the car, it involves the development of a number of new specifications and the revision of the original specifications within the two working groups of IEEE802 and 802.1, including PHY specifications, AVB specifications, and single-wire to data line power supply. In addition, AVB related to AV transmission, timing synchronization and other specifications also need to be standardized by other technical committees of IEEE, such as IEEE1722 and IEEE1588.
OPEN Alliance
The OPEN Industry Alliance was launched in November 2011 by Broadcom, NXP, and BMW to promote the application of Ethernet-based technology standards to in-car connectivity. The main standardization goal is to develop a 100Mbit/s BroadR-R physical layer standard and develop OPEN interoperability requirements.
AUTOSAR
AUTOSAR is a consortium of automotive manufacturers, suppliers, and tool developers that aims to develop an open, standardized automotive software architecture, and the AUTOSAR specification already includes the automotive TCP/UDP/IP protocol stack.
AVnu
The AVnu Alliance was formed by Broadcom in collaboration with Cisco, Harman and Intel to promote the IEEE 802.1 AVB standard and the Time Synchronization Network (TSN) standard, establish a certification system, and address important technical and performance issues such as precise timing, real-time synchronization, bandwidth reservation, and traffic shaping.
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