Patent application number | Description | Published |
20080232213 | Feedback Control Loop for Bit Detection in an N-Dimensional Data Block - On existing DVD and CD players a control loop is required for the adaptation and timing recovery. For Two-Dimensional Optical Storage such a control loop has drawbacks because PRML detection in the form of a stripe-wise Viterbi detector is used. Such a detector introduces an increasing detection delay when going from the outer rows towards the center of the broad spiral. A feedback loop is arranged to determining an error signal from a first area of the data block where the first area is that area where the error signal can be determined within the shortest period of time. This reduces the duration of the detection step and thus increases the stability of the control loop. | 09-25-2008 |
20080316071 | Modulation Coding with Rll (1,K) and Mtr (2) Constraints - This invention relates to a method of converting a user bitstream into a coded bitstream by means of a runlengh limited (d, k) channel code where the channel code has a constraint of d=1. In order to ensure an improvement in bit detection performance an additional RMTR constraint of r=2 is imposed limiting to two the maximum number of minimum runs allowed by the d=1 constraint. An additional advantage of such a code is a limitation of the back-tracking depth of a Viterbi bit-detector Based on two different k constraints the construction of such d=1 and r=2 codes is disclosed. | 12-25-2008 |
20080317140 | Method of Converting a User Bitstream Into Coded Bitstream, Method for Detecting a Synchronization Pattern in a Signal, a Record Carier, a Signal, a Recording Device and a Playback Device - This ID proposes synchronization patterns for RLL codes with a (repeated) minimum transition run (RMTR) constraint, where the synchronization pattern comprises a synchronization pattern-body that contains a characteristic bit-pattern that represents a violation of the RMTR constraint. Using a violation of the RMTR constraint allows for short synchronization patterns. | 12-25-2008 |
20080317170 | Embedding a Secondary Information Signal in a Channel Data Stream - The present invention relates to a method and a corresponding device for embedding a secondary information signal in a channel data stream of encoded primary information signal. In order to make it more difficult for unauthorized persons or devices to retrieve the location of storage of the secondary information signal or its content itself a device is proposed according to the present invention comprising:
| 12-25-2008 |
20090015446 | Coder and a Method of Coding For Codes With a Parity-Complementary Word Assignment Having a Constraint of D1=,R=2 - Presently known d=1 codes have long trains consisting of consecutive 2T runs and an overall high frequency of occurrence of the shortest 2T runs that reduce the performance of the bit detector By using a code with an MTR constraint of 2 an improvement in the bit detection is achieved. A code constructed in a systematic way that provides an MTR constraint of 2 is presented. A variation of such a code is disclosed where one sub-code is used, where coding states are divided into coding classes and where code words are divided into code word types. Then, for a given sub-code, an code word of type t can be concatenated with an code word of the next sub-code if said subsequent code word of said next sub-code belongs to one of coding states of the coding class with index T | 01-15-2009 |
20090018410 | BODY PARAMETER SENSING - A body parameter sensing arrangement comprising clothing ( | 01-15-2009 |
20090028031 | METHOD AND APPARATUS FOR WRITING/READING AN INFORMATION CARRIER AND SUCH AN INFORMATION CARRIER - Proposed is a method and apparatus for writing/reading a data block onto/from an information carrier with M-spots schemes and such an information carrier. The method comprises the steps of dividing the data block into N portions according to predetermined writing capacities for each one of the N writers of the M-spots schemes, N and M being integers not less than 2 and N<=M, and writing simultaneously the N portions of data onto the information carrier with the N writers correspondingly. Since all the writers are processing different portions of one data block, the data rate of processing one data block is increased almost N times. Therefore the period that the certain buffer capacity occupied by a data block is decreased substantially, total buffering capacity may be decreased, that means the cost of the schemes is dropped substantially. | 01-29-2009 |
20090067311 | METHOD AND APPARATUS FOR RECORDING SECONDARY INFORMATION ON A RECORD CARRIER - The present invention relates to a method of recording secondary information on a record carrier, in particular on an optical record carrier, besides its content information, whereby it is possible to differentiate the record carrier from other record carrier bearing the same content information, for example by recording an individual identifier. The secondary information is recorded by: forming at predetermined positions dummy patterns ( | 03-12-2009 |
20090296556 | READING DEVICE FOR A RECORD CARRIER - The invention provides an efficient reading device in which, even if one radiation beam should fail, no information is lost and the information can still be read out without time-consuming recurring operations. The present invention solves this problem by providing a reading device (FIG. | 12-03-2009 |
20100085849 | OPTICAL DISC DRIVE AND METHOD FOR PREPROCESSING A DISC READ OUT SIGNAL - The present invention discloses an optical drive and a method for preprocessing a disc readout signal r | 04-08-2010 |