TDVision - AbsoluteAstronomy.com

TDVision Systems Inc is a company that has designed products and system architectures for Stereoscopic Video Coding

Stereoscopic Video Coding

-3D Video Coding:3D Video Coding is one of the stages required for the deployment of stereoscopic content in the home. There are three techniques which are used to achieve stereoscopic video:# Color shifting...

, Stereoscopic Video Games, and Head Mounted Display. The company was founded by Manuel Gutierrez Novelo in Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

in 2001, and moved to the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

in 2004.

The company has asserted that there were problems with some 3D deployment technologies, including lack of compatibility with 2D existing pipelines

Graphics pipeline

In 3D computer graphics, the terms graphics pipeline or rendering pipeline most commonly refers to the current state of the art method of rasterization-based rendering as supported by commodity graphics hardware. The graphics pipeline typically accepts some representation of a three-dimensional...

, side effects due to visual artifacts

Digital artifact

A digital artifact is any undesired alteration in data introduced in a digital process by an involved technique and/or technology.-Possible causes:...

and detriment on the quality, color or resolution of the stereoscopic images. The company designed a stereoscopic system that it claims to reduce some of these side effects by providing full HD left and right images to each eye rather than using interpolation or pixel sub-sampled images. This included a deployment methodcodec

Codec

A codec is a device or computer program capable of encoding or decoding a digital data stream or signal. The word codec is a portmanteau of "compressor-decompressor" or, more commonly, "coder-decoder"...

called TDVCodec AKA 2D+Delta unveiled in 2007, designed to work with current hardware, such as Blu-ray discs, DVDs, set top boxes and satellite receivers. The 2D+Delta method is similar to that used in the MPEG-2 Multiview profile and the more recent MVC (Multiview Video Coding) standard. Other TDVision products include the first consumer electronics stereoscopic 3D full HD video camera called TDVCam in 2006 and a head-mounted display

HMD

HMD can mean:* Heavy Metal Detox * Head-mounted display* Haughton Mad Dogs - Darlington* Helmet mounted display* the ISO 3166-1 three-letter country code and an abbreviation for Heard Island and McDonald Islands...

for 3D stereoscopic full HD 720p video viewing Head Mounted Display device called TDVisor in 2007.

TDVisor

TDVisor is a head-mounted display

HMD

for stereoscopic 3D video viewing. In 2007, it was supported in a Northrop Grumman

Northrop Grumman

Northrop Grumman Corporation is an American global aerospace and defense technology company formed by the 1994 purchase of Grumman by Northrop. The company was the fourth-largest defense contractor in the world as of 2010, and the largest builder of naval vessels. Northrop Grumman employs over...

system called RainStorm., and many other training, remote controlled operations, surveillance, unmanned vehicles, educational and immersive video gaming applications.

TDVCodec

TDVision developed and patented world wide the 2D+Delta method of Stereoscopic Video Coding

Stereoscopic Video Coding

for an encoding and decoding method in 2003, also called the TDVCodec. Key features of the encoding format include up to Full HD (1920x1080) per-eye stereoscopic resolution, and 2D backwards compatibility with existing televisions and Cable television

Cable television

Cable television is a system of providing television programs to consumers via radio frequency signals transmitted to televisions through coaxial cables or digital light pulses through fixed optical fibers located on the subscriber's property, much like the over-the-air method used in traditional...

, Satellite Television

Satellite television

Satellite television is television programming delivered by the means of communications satellite and received by an outdoor antenna, usually a parabolic mirror generally referred to as a satellite dish, and as far as household usage is concerned, a satellite receiver either in the form of an...

, Blu-ray, ATSC

ATSC

ATSC standards are a set of standards developed by the Advanced Television Systems Committee for digital television transmission over terrestrial, cable, and satellite networks....

decoders and PC based systems.

The first demonstration of a full HD 3D Blu-ray Disc running on 2D+Delta and compatible with 2D legacy players in the world was made by TDVision in April 2008 during the National Association of Broadcasters (NAB) Trade Show in Las Vegas, Nevada, as recorded on the press release Stereoscopic 3D Content at Home, Brought to You By TDVision's TDVCodec and then mentioned on the article 3D Blu-ray Closer to Reality in May 2008. The company was then listed as key IP holder on the MVC standard on the ISO JTC Patent Database and the initiative evolved to what is now known as the selected spec of the Blu-ray Disc Association as mentioned in the article Final 3-D Blu-ray Specification Announced where all the characteristics of the 2D+Delta method were confirmed:

"The Blu-ray 3D specification calls for encoding 3-D video using the Multiview Video Coding (MVC) codec, an extension to the ITU-T H.264 Advanced Video Coding (AVC) codec currently supported by all Blu-ray Disc players. MPEG4-MVC compresses both left and right eye views with a typical 50% overhead compared to equivalent 2-D content, and can provide full 1080p resolution backward compatibility with current 2-D Blu-ray Disc players."

Comparison of the 2D+Delta method to other deployment related technologies

Other deployment formats like pixel sub-sample (side-by-side or over-under or checkerboard, quincunx) require interpolation, filters and antialiasing to reconstruct the views.
The TDVCodec is said to provide Full HD 3D continuous video streams to the viewer.

Native 3D Display formats

Frame Sequential: Frames alternating at 120 Hz effectively displaying full HD per eye sequentially
Dual Input: Cinema Projectors and HMDs
Horizontal Interleaved: DLP based displays
Checkerboard (pixel) interlaced: Micropol Xpol

Polarization methods

LCD shutter glasses

Liquid crystal shutter glasses are glasses used in conjunction with a display screen to create the illusion of a three dimensional image, an example of stereoscopy. Each eye's glass contains a liquid crystal layer which has the property of becoming dark when voltage is applied, being otherwise...

polarization
Circular polarization

Circular polarization

In electrodynamics, circular polarization of an electromagnetic wave is a polarization in which the electric field of the passing wave does not change strength but only changes direction in a rotary type manner....

External links

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