SD memory cards get new speed indicator




The SD Association has announced a new standard to classify SD memory cards. SD and micro SD memory cards need more clear video with a Speed ​​Class designation which is the minimum sequential write.

According to the SD Association are the new SD 5.0 specifications necessary to make clear what memory cards are compatible with 8k-filming or recording 360 degree video. The organization calls for this new Video Speed ​​Class in life. Different SD memory cards, including SDHC, SDXC and micro sd, will be provided in the near future of a V logo, followed by a number. That number indicates the minimum sequential write speed of the memory card.

The SD Association states that requires a minimum sequential write speed of 60MB / s for recording with 60fps in an 8k resolution 7680×4320 pixels. At 120fps would 90MB / s. In practice, the required write speed will be related to the compression that is applied by the respective camera.

SD 5.0

Previously, the speed of memory cards was indicated by the Speed ​​Class. Many memory cards have become much faster than the maximum speed prescribed ‘Class 10’. Therefore, the SD Association was already a new standard for cards that are equipped with Ultra High Speed ​​bus. The U1 and U3 indications, which represent minimum sequential write speeds of 10MB / s and 30MB / s, however, are in many cases not enough to clearly display the actual performance of such UHS memory cards.

Most manufacturers screens with high read speeds on their memory cards. determine the actual writing is sometimes difficult. Only the speeds are often clearly stated in the fastest and most expensive memory cards. With the new SD 5.0 ​​standard it should be easier to find out the minimal sequential write, in view of the Video Speed ​​Class provides for a much broader spectrum of velocities; 6MB / s to 90MB / s. Although the organization touts the new standard for 8k video and other new film formats, the introduction of the new classification can thus be of wider interest. When manufacturers go about their memories of the correct Video Speed ​​Class logo feature is not yet known.


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