Sony and Panasonic Define Archival WORM Disc at 300GB

Sony Corporation and Panasonic Corporation have formulated Archival Disc, a standard for professional-use, next-generation optical discs, with the objective of expanding the market for long-term digital storage.

Optical discs have properties to protect themselves against the environment, such as dust-resistance and water-resistance, and can also withstand changes in temperature and humidity when stored.

They also allow inter-generational compatibility between different formats, ensuring that data can continue to be read even as formats evolve. This makes them robust media for long-term storage of content. Recognizing that optical discs will need to accommodate much larger volumes of storage going forward, particularly given the anticipated future growth in the archive market, Sony and Panasonic have been engaged in the joint development of a standard for professional-use next-generation optical discs.

These efforts resulted in the formulation of Archival Disc, a new professional-use next-generation optical disc standard with technology roadmap, logo, and specifications.

The basic agreement to jointly develop a standard for professional-use next generation optical discs was originally announced on July 29, 2013.

Sony and Panasonic sign basic agreement to jointly develop standard for professional-use next-generation optical.

Roadmap
They aim to launch systems with a recording capacity of 300GB per disc from summer 2015, onwards. In addition, both companies plan to leverage their respective technologies to further expand the recording capacity per disc to 500GB and 1TB.

Archival Disc,sony,panasonic

The following logo has been designed to represent the Archival Disc professional-use next-generation optical disc standard.

Archival Disc,sony,panasonic f1

In recent times, demand for archival capabilities has increased in the film industry, as well as in cloud data centers that handle big data, where advances in network services have caused data volumes to soar.

Both Sony and Panasonic have experience working on the development of Blu-ray Disc technology. The two companies plan to promote this next-generation high-capacity optical disc standard in the professional field in order to offer an effective solution for protecting valuable data into the future.

Key Archival Disc specifications

-   Disc size (type): 300GB (write-once)

-   Optical parameter: Wavelength λ=405nm, Numerical Aperture NA=0.85

-   Disc structure: Double-sided disc (3 layers/side), land and groove format

-   Track pitch: 0.225μm

-   Data bit length: 79.5nm

-   Error correction method: Reed-Solomon Code

Crosstalk cancellation technology and high-order Partial Response Maximum Likelihood (PRML) signal processing technology have been employed to achieve both larger capacity and higher playback signal quality. Crosstalk electrically removes crosstalk from the adjacent tracks that increase as the track pitch becomes narrower, to achieve high-quality playback performance. PRML is a signal processing technology that improves reproduction performance by allowing inter-symbol interference.

Author: Anonymous

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