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An LDS file may also be a high-resolution copy of the data contained on a LaserDisc. It contains encoded analog data created by capturing the raw radio frequency produced by a LaserDisc player's laser. LDS files most likely contain data copied from a BBC Domesday LaserDisc, using Domesday86.
In 1986, the BBC finished and released the results of its Domesday project. The project, which sought to produce a picture of the United Kingdom's then-current culture, was comprised of maps, photos, statistical data, and videos. This data, gathered from over 1 million British people, was stored on LaserDics in the LaserVision Read Only Memory (LV-ROM) format. The discs' data could be viewed only on a specialized BBC Master PC that contained a specific Acorn Interactive Video Small Computer System Interface card that allowed the PC to interface with a Phillips VP415 LaserVision player.
As the technology required to view Domesday LaserDiscs fell out of fashion, people began working to preserve and transfer the discs' data to other media. Notably, Domesday enthusiasts Simon Inns and Ian Smallshire created the Domesday86 project and the Domesday Duplicator, which allowed them to copy the data stored on Domesday LaserDiscs. To copy the data, Domesday86 produced a device that captured the radio frequency produced as a laser read a LaserDisc. They then stored this radio frequency data and, in theory, could use it to produce an exact copy of the LaserDisc the data was recorded from. When this LaserDisc radio frequency data is saved as a file, it is saved as an LDS file.
How to open an LDS file
The ld-decode suite (Linux) includes several tools that allow users to interact with LDS files. You can use ld-compress to compress LDS files into .LDF files, and you can use ld-decode to transform an LDS file into a .TBC file. After transforming an LDS file into a TBC file, you can watch the video the TBC file contains in ld-analyze.