Three commonly asked questions pertaining to HDMI cables

HDMI (High Definition Multimedia Interface) cables are the best way to transmit data from a storage unit to a display device. They are extremely beneficial, especially if you have your favourite movie stored on an external HDD.

Mentioned below are some frequently asked questions pertaining to HDMI cables.

What is the difference between HDMI 1.3, 1.3a and 1.3b?

As a consumer, you might not find any noticeable difference between the three different types. The minor revisions to the specification typically relates to manufacturing or testing issues and are in no way related to the features or functionality. However, the version number might affect the type of adaptor that you purchase.

Do HDMI cables support closed captioning?

The upgrade from analogue to digital TV has added a bit of complexity to closed captioning (CC). With a standard way of transmitting, displaying and decoding the content, it was fairly easy to enable CC on analogue TV sets.

However, the responsibility of decoding CC was taken away from the TVs and put into Set Top Boxes (STB) with the advent of digital TV sets. STBs make decoding the CCs a complicated procedure. The implementation of CC can vary from one product to another. This process can either be simple or more difficult, depending on the implementation. It should be noted that CCs might work differently on different TV sets.

What is the difference between standard and high-speed HDMI cables?

The HDMI Licensing Company introduced the policy of dividing HDMI cables into two categories – Standard and High-Speed Cables.

Standard Cables: Cables that have been tested to perform at speeds of 75-80 MHz and up to 1.25 GBPS are usually categorised as Standard HDMI Cables. These cables support resolutions up to 720p/1080i.

High-Speed Cables: Cables that are tested to perform at speeds of up to 340 MHz and/or 10.2 GBPS are known as High-Speed HDMI Cables. These cables can support resolutions of up to 2560 x 1600 on high resolution display such as WQXGA cinema monitors.

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