Author Archives: Raghavendar T S

Class Rating in Memory Cards – ALL YOU NEED TO KNOW

Class Rating in Memory Cards – ALL YOU NEED TO KNOW

          Memory cards are one of the most popular storage device which are used in portable electronic devices like smartphones, digital cameras, portable gaming consoles(PSP, Nvidia Shield etc), MP3 players etc. The revolution in science and technology has made made the memory card into very small chip with greater storage capacity ranging from megabytes to 256GB. Its a great thing that 256GB of data is accommodated into such a small chip. Also the price of the memory cards are getting cheaper and cheaper. Memory cards are available in different model(MMC, SD, microSD, SDXC, SDHC etc) which can be used based on the device compatibility or requirement.

          Transcend, Kingston, Sony etc are some of the popular memory card manufactures. It is quite normal that we always go for buying the products with less price and we expect a decent quality. This thought might lead to performance degradation in the electronic devices. Consider the below image.

8GB microSD memory card
1. Class 2
2. Class 4

          Both the 8GB memory cards in the above image are from same manufacturer, but the price in different. The memory card at the right side will be costlier than the memory card which at the left on the image. The difference lies in the Class Rating on it. Class Rating is a measure of read write performance of which is specified at the top right corner of the memory card with a number enclosed in a circle. The performance of any storage device can be measured by its read write performance. i.e the speed at which the data is transferred to and from the storage device. In the case of memory card Class Rating specifies its performance. The electronic device which we use may give low performance if we are using memory card with lesser Class Rating than the specified one. But in most cases we are considering only the storage with not being aware of the Class Rating. This will lead to performance degradation of the electronic device which we are using.

An example situation where we get degraded performance

          Consider we have digital camera which is capable of recording FullHD video which will be stored in the memory card. While shooting, the digital camera will shoot the video and the data will be continuously be transferred from camera to memory card. Consider we are using memory card with Class Rating 2 which will not be sufficient for recording FullHD video. This is because Class Rating 2 memory cards have read/write performance of upto 2MB/s. But the digital camera will be recording(generating the data) the video at 6MB/s or even 10MB/s. Thus the camera cannot record the video properly due to the low performance memory card. This is the case of any electronic device which uses memory  cards. So always go for memory cards with better class rating which is meant for the device we are using.Below table shows the Class Rating and its corresponding application use.

Class Rating and their Applications

Class Rating
Class 2
      1.    SD video recording
Class 4
4 MB/s
      1.   High-definition video (HD)
      2.    Full HD video recording
Class 6
6 MB/s
      1.    High-definition video (HD)
      2.    Full HD video recording
Class 10
6 MB/s
      1.    Full HD video recording
      2.    consecutive recording of HD stills
UHS Speed Grade 1
10 MB/s
      1.    Real-time broadcasts
      2.    large HD video files          

              UHS are Ultra High Speed memory card which gives better performance and are usually used in Digital-SLR cameras.

MOVERIO BT-100 – Portable Virtual Reality Glasses from EPSON

MOVERIO BT-100 – Portable Virtual Reality Glasses from EPSON

             We already saw some of the virtual headsets such as cinemizer OLED and Oculus Rift. MOVERIO BT-100 is yet another VR headset running on Android v2.2 which gives a great cinematic experience. MOVERIO BT-100 is equipped with advanced see-through lenses which makes the user to see the digital screen of the VR glasses and also see the surrounding without any disturbance. This is a unique and innovative technology which is not present in other VR devices. MOVERIO BT-100 gives a virtual reality experience of watching videos movies in 320inch screens and also has support for playing 3D content. MOVERIO BT-100 comes with handheld devices which is used for controlling media content. Another exclusive feature is WiFi. This makes it possible for the user to have rich internet browsing experience with the glass as display itself. 

  • WiFi for Internet browsing
    • Media content like audios and videos can be streamed over the internet
  • Virtual Reality experience of watching 320inch screen
  • See-through lenses
  • detachable Dolby Mobile stereo sound earphones for rich sound
  • Exclusive handheld device with track-pad for controlling the media
Virtual Reality Experience

Technical Specification

  • Supported file formats
    • MPEG4, H.264, AAC, MP3
  • 1GB built-in memory
  • 32GB expandable memory with microSDHC card slot
  • Audio jack
  • Lithium-polymer battery with 6hours video playback
MOVIERIO BT-100 – Virtual Reality Glasses


  • No support for video-in port
  • Price tag – The device is priced for 499 USD with 4GB memory card and are available at popular shopping websites likes



            The technology we use has changed a lot. We control the technology with voice, hand gestures, eye and many more. Control of electronic devices like smartphones and televisions are controlled with voice with the use of latest technology in hardware and software. In advanced televisions and gaming consoles like Xbox, the system is able to track hand and other body movements. With such great innovation we have our next innovation in line up which is named MYO from Thalmic Labs,a wearable wrist  band which tracks the movement of hand and fingers.

For each movement in our body, there is a corresponding movement in our muscle. MYO which fits just above the wrist tracks the hand and finger movements by tracking the movement in the muscle and such muscle activity is converted into wireless signal which is sent to electrical devices like computer, laptop or a smartphone.

           MYO has the capability to control presentations, video, content, games, browse the web, create music, edit videos and many more. The developers from other field (like smartphone, gaming console) are coming forward to develop application which can be used with MYO. Currently the MYO is supported by Windows and Mac operating system and soon the APIs will be released for Android and iOS.

MYO – Wearable Gesture Based Control Device
Illustration of MYO – Muscle movement

Hardware Specification

  • Bluetooth 4.0
  • Rechargeable Lithium-Ion battery
  • 9-axis inertial measurement unit
  • Proprietary muscle activity sensors

           MYO can detect change in movements of hand, fingers, rotations in all directions. The developer version of MYO will be released in a couple of months and the commercial version will be released in 2014. MYO is  available for pre-order for 159 USD.

AMD Radeon RAMDisk – Software solution – Get faster performance than SSDs with existing RAM

AMD Radeon RAMDisk – Software solution – Get faster performance than SSDs with existing RAM

        We all know about computer storage devices namely volatile and nonvolatile storage. Non-volatile storage devices stores the data even during the device is powered off and on the other hand volatile storage devices do not store the data when it is powered off. Hard disks or hard drives used in desktops and laptops are best examples of non volatile storage devices. Solid-state disk(SSD) is another non volatile storage device which is newer technology and gaining popularity for its increased performance compared to the normal hard drive. The performance of the storage devices can be measured with read and write rates.i.e the speed at which the data are read and write from the storage device. Currently SSDs are commercial storage device which offers very great performance but with greater price tag. Random Access Memory(RAM) is the best example for volatile storage.

           The computers which we are using today comes with lot or RAM usually 8GB or 16GB and even 32GB or 64GB in high gaming systems and workstations. Are we using that full amount of memory? Actually the answer is NO except for the few cases like gaming and that too playing a high end game like Crysis (Crysis series) and Battlefield 3 will push the memory usage to the max of 8GB to 10GB. What happens to the rest of the memory(RAM). Of course it remains unused? This is the case even when we are doing daily computer activities like browsing the internet or when running graphic intensive applications like CAD or video editing or anything. Is there a better way to utilize the unused memory and that too with higher performance than SSD and hard disk? YESSSSSSSS!!!!

               Random Access Memory(RAM) are the fastest storage devices compared to SSD and hard disk.But RAM is volatile storage. AMD Radeon RAMDisk is a new and innovative software solution from AMD which enable the user to create virtual drive from the RAM(a part of the RAM can used to create virtual disk). We can run any application or game from the virtual drive created from Radeon RAMDisk which makes the applications or games run faster than when it run on hard disk or SSD. Virtual drive created from Radeon RAMDisk makes the user to store any data as if the data been stored in normal hard drive or SSD and can be accessed in similar way what we do in normal hard drives or SSDs.

So now we are using volatile storage as a non volatile storage with Radeon RAMDisk which increases the performance of the applications or games and we are able to utilize the full capability of the system without wasting the precious memory available in RAM.

           For an application or game to run, the required files will be transferred to and fro from the hard disk and RAM. In  Radeon RAMDisk the entire RAM is split into virtual drive(RAMDisk) and RAM. With Radeon RAMDisk, the entire content of the game or application will be create as virtual disk(virtual disk is the memory in RAM) and that virtual disk will act like a local hard drive. Now when we run the game or application from the virtual drive, the required data will need to be transferred to and fro from within the RAM i.e from the virtual disk and the RAM which makes the process faster than current generation SSD.


  • Speed up internet page loads
  • Speed up disk to disk activities
  • Improved performance in gaming, video editing etc
Hard Drive SSD RAMDisk


From the above benchmark details from AMD, we can see a great performance improvement  in RAMDisk compared to the hard drive and SSD. The benchmarking tool used in Crystal Diskmark.

AMD Radeon RAMDisk is available for free with which you can create RAMDisk(virtual disk) upto 4GB. The commercial version of AMD Radeon RAMDisk costs $14.99 with which you can create RAMDisk upto 32GB and the Radeon RAMDisk with price tag $18.99 enable us to create RAMDisk upto 64GB. AMD Radeon RAMDisk can be used with memory modules from any manufacturer.

Official Website:

cinemizer OLED – Virtual Reality headset from Carl Zeiss

cinemizer OLED – Virtual Reality headset from Carl Zeiss

            Everyone would be aware of Oculus Rift, next generation virtual reality headset. we have been for the consumer version of the product for  a very long time. If you want to get something similar to Oculus Rift, grab cinemizer OLED, 3D Virtual Reality video glasses from from Carl Zeiss with innovative and cool features. cinemizer OLED has smaller form factor compared to Oculus Rift. Oculus Rift targets particularly for games. However cinemizer OLED is for gaming, movies, CAD and many more.


  • HDMI or analog A/V ports which makes it possible for cinemizer OLED to connect with almost all devices like Blu-ray player, gaming consoles, PCs, notebooks, and even smartphones
  • Virtual reality display that produces view similar to theater atmosphere
  • Supports NVIDIA 3DTV Play
  • Supports resolution up-to 1080p at 60Hz


  • Two high-resolution OLED displays each with 870 × 500 pixels
  • 3.5 mm audio port for external stereo headphones
  • Power supply/battery
    • Rechargeable lithium-ion battery
    • Charge via USB
    • Mini USB to charge the integrated battery
    • Battery life: up to 6 hours with iPod/iPhone and AV-In and up to 2.5 hours with HDMI

The cinemizer OLED has a very compact design with which a user cannot wear normal eyeglasses