We are developing a high-density recording method for optical disc storage. To improve the density of optical recording systems and increase the operational margin, we previously optimized the PR17pp trellis by mergin...
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We are developing a high-density recording method for optical disc storage. To improve the density of optical recording systems and increase the operational margin, we previously optimized the PR17pp trellis by merging the PR(1221) trellis and qJ we achieved a higher recording density in optical disc storage. In this paper, we propose a new high-density low density parity check (LDPC)-coded PR17pp system with PR(12221)-ML. We experimentally confirmed that the system significantly increases the tilt margin of 36.0GB optical disc with Blu-ray disc parameters.
In this paper, we propose a modified calculation method of the branch metric in partial response maximum likelihood (PRML) detection for high-density optical storage systems. The scheme is related to the relative prob...
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In this paper, we propose a modified calculation method of the branch metric in partial response maximum likelihood (PRML) detection for high-density optical storage systems. The scheme is related to the relative probability of the run-length limited code. Hence, we also present the relative probabilities of the 17pp coded sequences for 2nd-, 3rd- and 4th-orders of PR targets. The modified PRML detection using the relative probability of the 17pp coded sequence has better bit error rate (BER) performance than conventional PRML detection.
We have previously proposed a novel trellis decoding technique for soft-output decoding of the 17pp code. Using this technique, we have developed a turbo-coded 17pp system, and showed improvement in the bit error rate...
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We have previously proposed a novel trellis decoding technique for soft-output decoding of the 17pp code. Using this technique, we have developed a turbo-coded 17pp system, and showed improvement in the bit error rate (BER) in an additive white Gaussian noise (AWGN) channel by simulation. In this paper, we describe an optimized trellis of the 17pp code that has only 15 states and 53 branches. It is well known that a partial response (PR) channel can be regarded as a convo-lutional code with the trellis structure. Therefore we merged the PR1221 trellis into the 17pp trellis, which we call the "PR17pp" trellis, and similarly optimized this trellis. With the soft-in soft-out (SISO) decoders using this "PR17pp" trellis, it is experimentally confirmed that the turbo-coded 17pp system effectively increases the user capacity of an optical disc.
We have previously proposed a novel trellis decoding technique for soft-output decoding of the 17pp code. Using this technique, we have developed a turbo-coded 17pp system, and showed improvement in the bit error rate...
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We have previously proposed a novel trellis decoding technique for soft-output decoding of the 17pp code. Using this technique, we have developed a turbo-coded 17pp system, and showed improvement in the bit error rate (BER) in an additive white Gaussian noise (AWGN) channel by simulation. In this paper, we describe an optimized trellis of the 17pp code that has only 15 states and 53 branches. It is well known that a partial response (PR) channel can be regarded as a convo-lutional code with the trellis structure. Therefore we merged the PR1221 trellis into the 17pp trellis, which we call the "PR17pp" trellis, and similarly optimized this trellis. With the soft-in soft-out (SISO) decoders using this "PR17pp" trellis, it is experimentally confirmed that the turbo-coded 17pp system effectively increases the user capacity of an optical disc.
In this paper, we propose a modified calculation method of the branch metric in partial response maximum likelihood (PRML) detection for high-density optical storage systems. The scheme is related to the relative prob...
详细信息
In this paper, we propose a modified calculation method of the branch metric in partial response maximum likelihood (PRML) detection for high-density optical storage systems. The scheme is related to the relative probability of the run-length limited code. Hence, we also present the relative probabilities of the 17pp coded sequences for 2nd-, 3rd- and 4th-orders of PR targets. The modified PRML detection using the relative probability of the 17pp coded sequence has better bit error rate (BER) performance than conventional PRML detection.
The signal properties were examined at recording densities higher than 100 Gbit/in.(2) in our solid immersion lens recording system of 1.84 numerical aperture (NA). The low-density parity-check coded partial-response ...
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The signal properties were examined at recording densities higher than 100 Gbit/in.(2) in our solid immersion lens recording system of 1.84 numerical aperture (NA). The low-density parity-check coded partial-response (PR) 17-parity preserve/prohibit (pp) system increased the recording density by approximately 35% compared with the previous results. The recording power tolerance was +/- 8.1% at a recording density of 109 Gbit/in.(2). We conclude that the upper limit of recording density Is 109 Gbit/in.(2), which is equivalent to 151 Gbytes for a 12-cm-diameter disc, assuming the same redundancy as that of the Blu-ray disc format. (C) 2009 The Japan Society of Applied Physics DOI: 10.1143/JJAP.48.03A042
Two-dimensional error correction codes (2D-ECCs) have been the cornerstone of all three generations of optical recording-CD, DVD and BD. Research into powerful error correction methods is paramount for the development...
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Two-dimensional error correction codes (2D-ECCs) have been the cornerstone of all three generations of optical recording-CD, DVD and BD. Research into powerful error correction methods is paramount for the development of high-capacity optical recording systems. A picket code for BD systems performs an error and erasure decoding by giving and taking erasure information between two ECCs. However, the method is possible to generate and utilize incorrect erasure information with non-ignorable probability by each ECC. This paper will present a new error correction strategy for BD systems that performs error and erasure decoding using the only erasure information supplied from a modulation code decoder more specifically, the 17 parity-preserving (pp) code for BD systems. We will evaluate the decoding efficiency of the new error correction technique under a channel model with various error types as well as real optical storage system
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