CD-ROM/DVD Compression Patent # 6,584,520 Award

CD ROM, Inc. today announced the notice of allowance from the US patent and trademark office for their second patent on compression on CD-ROM and DVD discs. This patent, called the CRI-X3 patent, increases the company’s patent portfolio for awarded patents in three fields of science: audio processing of signals on optical media; compression and encryption of data on optical media; and security devices for the permanent destruction of sensitive and classified data on optical media.

The new patent claims cover processes for accessing compressed data on optical media, including both CD-ROMs and DVD-ROMs. One of the allowed claims, for example, covers:

“.… A method for dynamically generating a file allocation table based upon files storage information on a CD-ROM for retrieving compressed files directly from the CD-ROM…”

CD ROM’s patented technology, currently being marketed under the trademark CRI-X3™, permits standard off-the-shelf or custom compression algorithms commonly used on a read-write magnetic media to be used effectively on read-only optical media. The technology offers at least two significant competitive advantages in the optical disc industry. First, the amount of information, which can be stored on the DVD, increases from a standard 4.7GB of data to an average three times that amount per platter. Second, access to the compressed data on the optical media speeds up in direct proportion to the compression ratio. A CD-ROM or DVD-ROM that has the CRI-X3™ code can be read at double or triple the normal data transfer rate. Compression rates have been achieved in excess of 128 times. This technology would be suitable for rapid burst transmissions of densely packed digital data.

Dr. Roger Hutchison, President and CEO of CD ROM, Inc., said of the patented technology:

“The CRI-X3™ technology offers a more efficient means of first placing and then accessing information from optical media. This is accomplished by utilizing the same fundamental processes that make standard telephony able to place simultaneous digital calls on the same twisted copper wire, or several thousand simultaneous calls on optical fiber. Our technology, when widely utilized in the computer and entertainment industry, will offer a fundamentally new and better way of storing, accessing and transmitting data from optical media to the end-user. The implications of our compression and decompression process are far reaching in the telecommunications, broadband, and entertainment industry.”

CD ROM, Inc. is the oldest privately held CD-ROM and optical products company in the industry. The Company has been widely acknowledged as being an industry pioneer. CD ROM, Inc. develops technology and provides custom application solutions to its customers. This CRI-X3™ patent award will add to the existing intellectual property portfolio owned by the Company. Further information can be obtained at, or by contacting the press agent below.

For further information contact:
Lisa Weber

Vice President for Public Relations
tel. 952-832-5424

Fax. 952-832-5434

Shopping Cart
Scroll to Top