Broadcast distribution of content for storage on hardware protected optical storage media

Active Publication Date: 2011-06-14
WORLD THEATRE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One problem within the current art is the extensive capital investment required with new CD, DVD, and other optical disc process lines.
Another limitation associated with current content distribution schema are the inherent limitations within the present Digital Rights Management (DRM) as implemented with digital schemas, i.e., advances in processing power available for decryption, collaborative distributed processing efforts such as those utilized to break DES (digital encryption system), human disclosure factors as witnessed by the publication of standard DVD keys, combined with the fact that content is often available in an unencrypted format rendering the cryptographic analysis of the key possible.
The DataPlay disc and other forms of pre-recorded ROM type media, therefore, are limited, to the physical distribution of the discs and recorded content.
In addition, the DataPlay art and other forms recordable media are limited by the bandwidth and long latencies inherent to Internet content distribution methodologies.
Without immediately available content, currently unavailable to users utilizing such recording media, the DataPlay and other recordable media require users to wait for content prior to recording.
Finally, as DataPlay and other recording devices have used standard or publicly available methodologies in the reading or writing device, recorded content is no longer safe from unauthorized access.
Thus one limitation within the current art is the high ratio of overhead to data (audio) bits—currently 15.5/6.2, or equivalently 2.5:1.
Other limitations within the CD art include low total storage (from 783 to 867 megabytes), low output bandwidth (176 kilobytes/second standard 1×), and limited file format flexibility.
Since the optical system must be refocused to read the outer semi-reflective or inner fully-reflective (embedded layer), signal-to-noise losses occur when reading the inner layer.
Hence another limitation within the current art is the limited signal to noise ratio achievable with current 635/650 nm laser diodes and multi-layer DVD disc technology.
Thus another limitation within the current art is the still low coding efficiency of DVD technology.
Yet another limitation of DVD is found in the low output data rate of 1.385 megabytes/second.
However, a typical DataPlay disc is 32 mm in diameter and holds only about 500 MB of data.
Thus one limitation of DataPlay technology is the low total storage capacity of the DataPlay Device.
Thus another limitation of DataPlay devices is their total sustainable read/write bandwidths.
Furthermore, because DataPlay technology is based upon DVD technology, other limitations within the current DataPlay technology are the limited signal to noise ratio achievable with current 635/650 nm laser diodes along with the still low coding efficiency.
In order to achieve reasonable laser diode power consumption levels, DataPlay devices utilize unprotected pits and land surfaces to encode data, making them highly vulnerable to damage by handling and contamination.
This methodology was developed in response to limitations found in the CD's placement of the data layer near the top surface, where it is extremely vulnerable to damage.
Thus another limitation within the current DataPlay art is the use of thin coated surfaces, making them highly vulnerable to damage and debris.
Inherently, all mechanical devices have a lower reliability than a system with no moving parts due to normal wear and tear, along with a greater susceptibilit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example

EXAMPLE 1

[0214]The increased bit densities from short wave laser diodes are utilized to decrease duty cycle and corresponding power consumption. Assuming the present industry standard circular linear velocity read rate of 3.84 m / sec, the improved bit density from a short wave laser diode provides an increase in output bandwidth to 2.17 megabytes / second, an improvement of 1.57:1. Improved signal to noise also accommodate higher multiples n*X of linear velocity read rates and commensurate increases in output data bandwidth. The increased bandwidth of 2.17 megabyte per second results into a 17 megabit per second data stream, or essentially four times the bandwidth of a high resolution independent video stream. By buffering the overall operational duty cycle may be reduced to 25%. A buffer of 64 megabytes, 512 megabits, affords a buffer time of 2.13 minutes. A buffer of 640 megabytes provides a buffer time of 21.3 minutes. The increased bit densities from UV wave laser diodes may be si

Example

EXAMPLE 2

[0217]The increased bit densities from short wave laser diodes are utilized to increase output bandwidth. Assuming the present industry standard circular linear velocity read rate of 3.84 m / sec, the improved bit density from a short wave laser diode provides an increase in output bandwidth to 2.17 megabytes / second, an improvement of 1.57:1. Improved signal to noise also accommodate higher multiples n*X of linear velocity read rates and commensurate increases in output data bandwidth. The increased bandwidth of 2.17 megabyte per second results into a 17 megabit per second data stream, or essentially four high resolution independent video streams. Each stream may be partially or fully buffered to allow for seeks to multiple content streams. The increased bit densities from UV wave laser diodes are utilized to increase output bandwidth. Assuming the present industry standard circular linear velocity read rate of 3.84 m / sec, the improved bit density from a UV laser diode pro

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PUM

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Abstract

Methods and systems for content distribution are provided that include a broadcast transmitter for transmitting a signal that comprises content, a receiver for receiving the signal, and an optical disc recorder coupled to the receiver for recording the content to an optical disc, which may be an optically altered optical disc.

Description

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Claims

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Application Information

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Owner WORLD THEATRE INC
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