Sunday, December 27, 2009
My husband surprised me with a new HD TV to replace the old non-HD "clunker" that was taking up space in an armoire in our bedroom. I went to attach my HD video camera to the new TV, and realized that three-foot HDMI cable was much too small. Knowing how fast everything changes with technology, I decided I should research HDMI before setting out to purchase a longer cable.
There is more to know about HDMI than I thought! Here's what I found so far:
There is an organization dedicated to HDMI standards, HDMI Licensing, LLC that provides a wealth of information about HDMI. It's worth taking the time to review the information contained on HDMI website, specifically, the following two links:
- HDMI 1.4 Specification Features (pdf) (Steve Venuti, HDMI LLC 2009)
- Consolidation of HD Video, audio, and data in a single cable.
- Enables high-speed bidirectional communication.
- Enables IP-based applications over HDMI. (Ethernet)
- Transfer speeds up to 100Mbps.
- Supports audio return channel.
- Can support up to 10.2 gigabits per second of bandwidth transmission
- HDMI 1.4 is the latest standard. It includes definitions for common 3D formats and resolutions, up to 1080p.
- HDMI 1.4 supports 4K x 2K resolution, which is the resolution of state-of-the art digital theaters and up to 4 times the resolution of 1080p.
- Allows for the optimization of picture settings based on type of content.
- Supports digital still camera-specific colors.
- Allows for smaller HDMI connectors, ideal for portable devices.
- Provides "High Definition Everywhere" support, with an automotive connection system designed to work effectively in vehicles.
"HDMI version numbers are used by manufacturers to identify a set of features. To help you shop for the features you want in a cable, the HDMI licensing authority has created standardized names for certain key features. Here are a few:
- Deep Color refers to monitors that can display a greater number of colors than traditional TVs, billions or trillions of colors rather than millions.
- x.v.Color> refers to an expanded, "wider" color gamut that includes colors not traditionally available in TVs. The x.v.Color space incorporates a much larger portion of the visible color spectrum than the older RGB color model.
- Standard and High Speed refer to two grades of HDMI cable, tested to different performance metrics. A Standard cable can transmit a 1080i signal for 15 meters (49 feet) or more, while a High Speed HDMI cable can transmit a 1080p signal for at least 7.5 meters (25 feet)."
HDMI 1.4 spec getting freshened up in preparation for broadcast 3D
Richard Lawler, 12/23/09
According to Lawler, the various companies are working towards standards, but we're not there yet. More information about HDMI 1.4 will be available at 2010 CES, held January 7-10 in Las Vegas.
-Photo of 3D video camera courtesy of Engadget.
The following is a direct quote from the Wireless HD website:
- High interoperability supported by major CE device and technology manufacturers
- Highest quality HD video, audio and data transmission, scalable to future high-definition A/V formats
- High-speed wireless, multi-gigabit technology in the unlicensed 60 GHz band
- Smart antenna technology for reliable non-line-of-sight operation
- Secure communications with DTCP and HDCP over WirelessHD technology
- Device control for simple operation of consumer electronics products using the basic remote control that ships with the TV
- Error protection, framing and timing control techniques for a quality consumer experience
- Low power options for mobile devices"
Cross-posted on the Interactive Multimedia Technology blog.