Having Specific Code Or Form Generation Or Regeneration Processing Patents (Class 369/59.23)
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Patent number: 7477585Abstract: An optical disk device which drives HD-DVD or the like. In an HD-DVD type optical disk, address information is embedded in four wobble waves having the same phase. A wobble signal is detected by an optical pickup and demodulated by an address decoding circuit. The address decoding circuit detects an amount of phase difference of the wobble signal. The system controller sets an error flag in a bit in which the detected amount of phase difference exceeds a predetermined range. When a reading error is determined by means of CRC or the like, bit data replacement is performed with regard to the bit in which an error flag has been set, thereby correcting the error.Type: GrantFiled: July 19, 2005Date of Patent: January 13, 2009Assignee: TEAC CorporationInventor: Akira Mashimo
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Patent number: 7474597Abstract: A writing method for an optical disc to optimize a writing speed, wherein a spiral track on the optical disc is divided into a plurality of zones, and different CLV writing speeds are used for performing a ZCLV writing to the zones respectively. The writing method comprises steps of: setting a plurality of writing modes; storing a plurality of zone parameter sets for the writing modes respectively in a memory, wherein each of the zone parameter sets comprises dividing times for dividing the zones, and the different CLV writing speeds for the zone respectively; determining a disc type of the optical disc by a disc type determining device before the ZCLV writing is performed; selecting one of the zone parameter sets that is suitable to the disc type of the optical disc; and performing the ZCLV writing with the writing mode corresponding to the selected zone parameter set.Type: GrantFiled: November 9, 2005Date of Patent: January 6, 2009Assignee: Ricoh Company, Ltd.Inventor: Hideki Iwasaki
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Publication number: 20080285413Abstract: An optical data recovery system including an optical receiver configured to receive light reflected from an optical medium and produce modulated data, a processing unit configured to transform the modulated data into a series of transform coefficients respectively identifying frequencies of the modulated data at respective times, and the processing unit is configured to identify from the series of transform coefficients defect coefficients associated with positions in the modulated data where the modulated data is corrupted.Type: ApplicationFiled: January 14, 2008Publication date: November 20, 2008Applicant: THE ARIZONA BD OF REG ON BEHALF OF THE UNIV OF AZInventors: Thomas Dean Milster, Swetha Kannan
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Patent number: 7453780Abstract: There is provided an information management apparatus which can make it impossible to read out data recorded on a write-once type recordable optical disk as required and the usefulness thereof is enhanced. When recorded data is destroyed on the write-once type recordable optical disk, data modulated by a modulation system of the same run length restriction as run length restriction of a modulation system used for recording data is overwritten and recorded, data is overwritten and recorded by use of patterns in which the frequency of occurrence of spaces of the longest code is higher than the frequency of occurrence of the modulation system used for recording data, or data is overwritten and recorded by use of successive patterns of the shortest code in the run length restriction of the modulation system used for recording data.Type: GrantFiled: July 28, 2005Date of Patent: November 18, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Akihito Ogawa, Hiroharu Satoh, Chosaku Noda
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Patent number: 7443773Abstract: An information storage medium having a lead-in area, a user data area, and a lead-out area, wherein information regarding whether additional information is recorded as wobbling pits is recorded in at least a portion of at least one of the lead-in and the lead-out areas.Type: GrantFiled: June 25, 2004Date of Patent: October 28, 2008Assignee: Samsung Electronics Co., Ltd.Inventor: Kyung-geun Lee
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Publication number: 20080247293Abstract: A data recording method according to the present invention is a method for recording data as edge position information, including marks and spaces of multiple different lengths, on a storage medium by irradiating the storage medium with a pulsed energy beam. The method includes the steps of: (A) generating a write code sequence based on the data to be recorded; (B) determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and (C) modulating the power of the energy beam based on the write pulse waveform.Type: ApplicationFiled: June 5, 2008Publication date: October 9, 2008Inventors: Atsushi NAKAMURA, Shigeru Furumiya
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Patent number: 7433289Abstract: The present invention relates to a frequency detection method for an optical disc bit data reproduction apparatus. The frequency detection method uses the optical disc bit data reproduction apparatus including an Analog to Digital Converter (ADC), an interpolator, an asymmetry compensator, a digital bit and successive bit length detector, a frequency detector, a phase detector and a Digital Controlled Oscillator (DCO). In the frequency detection method includes the primary frequency detection step and the secondary frequency detection step. In the primary frequency detection step, status of input RF digital bit data frequency versus sampling frequency is determined and the sampling frequency is corrected so as to allow the sampling frequency to be rapidly adjusted to the frequency of the RF digital bit data, thus primarily detecting frequency.Type: GrantFiled: February 9, 2005Date of Patent: October 7, 2008Assignee: LG Electronics Inc.Inventors: Eun Pyo Lee, Gun Jae Koo
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Publication number: 20080239914Abstract: A method for to restore quantization data to binary data in a system for recording and/or reproducing the binary data includes selecting a selection region predicted to include an alignment mark from the quantization data, determining a location of the alignment mark within the selection region; and converting the quantization data to the binary data based on a comparison of the determined location of the alignment mark and an original location of the alignment mark.Type: ApplicationFiled: November 28, 2007Publication date: October 2, 2008Applicant: Samsung Electronics Co., LtdInventors: Hyun-soo PARK, Jin-han Kim
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Publication number: 20080239915Abstract: An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.Type: ApplicationFiled: May 19, 2008Publication date: October 2, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Jin-gyo Seo, Seong-sin Joo, Du-seop Yoon, Myung-do Roh, Yong-jin Ahn, Seoung-soo Kim, Kyung-geun Lee, Myeong-ho Cho, Chang-jin Yang, Jong-kyu Kim, Sung-ro Ko, Tatsuhiro Ohtsuka
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Publication number: 20080239916Abstract: A data recording method according to the present invention is a method for recording data as edge position information, including marks and spaces of multiple different lengths, on a storage medium by irradiating the storage medium with a pulsed energy beam. The method includes the steps of: (A) generating a write code sequence based on the data to be recorded; (B) determining a write pulse waveform, defining the power modulation of the energy beam, according to the code lengths of respective codes included in the write code sequence; and (C) modulating the power of the energy beam based on the write pulse waveform.Type: ApplicationFiled: June 5, 2008Publication date: October 2, 2008Inventors: Atsushi NAKAMURA, Shigeru FURUMIYA
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Patent number: 7414941Abstract: The present invention provides a data recording device that can restrain the low-pass component in data to be written onto a recording medium without causing a problem in decoding the data using likelihood information. This data recording device includes: a data bit string combining unit that combines, by predetermined combining rules, a plurality of predetermined parity bit strings one by one with a data bit string obtained prior to a change to the bit order in a bit order rearranging procedure, thereby generating a plurality of composite data bit strings; and a data bit string selecting unit that selects one encoded data bit string from a plurality of encoded data bit strings generated through encoding procedures including the bit order rearranging procedure carried out for each of the plurality of composite data bit strings. Based on the selected encoded data bit string, the data recording device performs a data write operation onto the recording medium.Type: GrantFiled: June 30, 2006Date of Patent: August 19, 2008Assignee: Fujitsu LimitedInventor: Akiyoshi Uchida
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Patent number: 7414946Abstract: A recording medium comprising a recording area, the recording area includes a first area and a second area, the first area includes a frame area, the frame area includes an area in which a second synchronization code sequence and at least a portion of data are to be recorded, and the second area includes an area in which a third synchronization code sequence and a fourth synchronization code sequence are to be recorded.Type: GrantFiled: June 7, 2007Date of Patent: August 19, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toyoji Gushima, Shigeru Furumiya, Takashi Ishida, Hiromichi Ishibashi, Hironori Deguchi, Atsushi Nakamura, Junichi Minamino, Makoto Usui, Takeshi Nakajima
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Patent number: 7411878Abstract: A method of reproducing an audio file includes: applying a reproducing mode established based on an attribute information; obtaining at least a part of the audio file under the established reproducing mode; and determining whether the audio file is reproducible under the established reproducing mode by checking whether the part of the audio file constructs a specific format stream corresponding to the applied reproducing mode.Type: GrantFiled: November 21, 2006Date of Patent: August 12, 2008Assignee: LG Electronics, Inc.Inventors: Yong Hee Han, Jong In Shin, Myung Gu Lee, Han Sang Lee
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Patent number: 7411889Abstract: Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.Type: GrantFiled: March 22, 2007Date of Patent: August 12, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Chosaku Noda, Akihito Ogawa, Kazuto Kuroda
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Patent number: 7408871Abstract: Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.Type: GrantFiled: March 22, 2007Date of Patent: August 5, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Chosaku Noda, Akihito Ogawa, Kazuto Kuroda
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Patent number: 7408850Abstract: Today the storage of audiovisual (AV) data on storage media employs standardized coding schemes, e.g. MPEG-2. End user devices for AV presentation, like disc players, contain dedicated decoders implemented in hardware, which are able to decode data streams complying with the respective standard. The efficiency of this decoding methodology relies on the standardization of appropriate coding schemes. Proprietary coding schemes may be more efficient by being adapted to the content, or may be used for content protection or optional features. Using reconfigurable decoder hardware, storing the configuration data for the actual decoder on the same storage medium as the AV data, and downloading the data to configure the player can be used to implement proprietary coding schemes. Such schemes require appropriate player hardware, suitable to execute a downloaded decoder under real-time conditions, and a standardized format to store the decoder configuration data.Type: GrantFiled: April 20, 2004Date of Patent: August 5, 2008Assignee: Thomson LicensingInventors: Jens Peter Wittenburg, Heinz-Werner Keesen, Herbert Schütze
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Patent number: 7406009Abstract: An information recording/reproducing apparatus and information reproducing method records information data, regardless of an external disturbance. According to a demodulated timing pulse, a synchronization signal and address data representative of an address is demodulated from a readout signal. An error correction process carried out on the address data obtains corrected address data. A determination is made if the corrected address data is a correct address. When the synchronization signal has a period equal to a predetermined period, a synchronization process is executed to place the demodulated timing pulse in synchronism with the synchronization signal, wherein, when the corrected address data is determined as a correct address, then the re-synchronization process is put into stand-by until the corrected address data is determined as an incorrect address.Type: GrantFiled: November 5, 2003Date of Patent: July 29, 2008Assignee: Pioneer CorporationInventor: Hideki Kobayashi
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Patent number: 7403462Abstract: A recording medium comprising a recording area, the recording area includes a first area and a second area, the first area includes a frame area, the frame area includes an area in which a second synchronization code sequence and at least a portion of data are to be recorded, and the second area includes an area in which a third synchronization code sequence and a fourth synchronization code sequence are to be recorded.Type: GrantFiled: October 25, 2006Date of Patent: July 22, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toyoji Gushima, Shigeru Furumiya, Takashi Ishida, Hiromichi Ishibashi, Hironori Deguchi, Atsushi Nakamura, Junichi Minamino, Makoto Usui, Takeshi Nakajima
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Patent number: 7400569Abstract: Address information is formed by M wobbles (integer M is the number of wobble waves) per bit as a basic unit, and is NRZ-recorded. Also, a sync signal used in sync detection of the address information is formed by N wobbles per bit as a basic unit (integer N is the number of wobble waves and M=2N). The sync signal with such configuration (6 wobbles per bit) is recorded on the head side of the address information (12 wobbles per bit). In this way, even when external noise is large, a modulated wobble signal can be demodulated more accurately.Type: GrantFiled: March 22, 2007Date of Patent: July 15, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Chosaku Noda, Akihito Ogawa, Kazuto Kuroda
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Patent number: 7400465Abstract: The present invention relates to a recording medium cartridge memory and recording/reproducing apparatus. A recording medium cartridge consists of a recording medium and a cartridge memory in which a unique ID of the apparatus used for recording/reproducing the cartridge memory is recorded in an unrewritable condition. The apparatus for recording/reproducing the recording cartridge memory consists of a sending/receiving unit which reads out an ID recorded in the cartridge memory, an ID inspection unit inspecting whether or not the ID recorded in the cartridge memory and an ID stored in the apparatus accord by comparing both, and a control unit which records data in a recording medium or control operations of a recording/reproducing unit which reproduces data from the recording medium based on an inspection result in the ID inspection unit.Type: GrantFiled: August 12, 2003Date of Patent: July 15, 2008Assignee: FUJIFILM CorporationInventor: Naoto Abe
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Patent number: 7397751Abstract: A recorded stream generator generates a data block stream in synchronism with the phase of a recording clock, from the input data. The recorded stream generator further generates, for each predetermined data unit constituting the data block stream, a data phase reference pulse indicative of the phase of the data unit. An inserting section inserts a VFO signal into a predetermined amount (32 sectors) of the data block stream, the VFO signal having a length of time corresponding to a difference in phase between an wobble address phase signal and a data phase reference pulse. The inserting section thus provides a data stream DST consisting of the VFO signals and the data block streams. An LD uses light beams to record the data stream on an optical disk.Type: GrantFiled: December 22, 2004Date of Patent: July 8, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Toshihiko Kaneshige, Koichi Otake, Hideyuki Yamakawa, Yukiyasu Tatsuzawa, Hiroyuki Moro
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Patent number: 7385903Abstract: A recording medium comprising a recording area, the recording area includes a first area and a second area, the first area includes a frame area, the frame area includes an area in which a second synchronization code sequence and at least a portion of data are to be recorded, and the second area includes an area in which a third synchronization code sequence and a fourth synchronization code sequence are to be recorded.Type: GrantFiled: October 25, 2006Date of Patent: June 10, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Toyoji Gushima, Shigeru Furumiya, Takashi Ishida, Hiromichi Ishibashi, Hironori Deguchi, Atsushi Nakamura, Junichi Minamino, Makoto Usui, Takeshi Nakajima
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Patent number: 7385901Abstract: The data to be recorded onto a recording medium is directly spread and then recorded onto the recording medium through a needle-shaped member, such as a probe. Upon reproducing the data, the data read from the recording medium is de-spread and reproduced.Type: GrantFiled: June 14, 2004Date of Patent: June 10, 2008Assignees: Pioneer CorporationInventors: Yasuo Cho, Atsushi Onoe
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Publication number: 20080130456Abstract: An optical recording medium and a method and apparatus for assigning a spare area in a rewritable optical recording medium are provided. According to an embodiment, there is provided an apparatus for assigning a spare area in a storage medium assignable at least one spare area, characterized by assigning a spare area within or to a predetermined maximum allowable size, the spare area being assignable to a first size smaller than the predetermined maximum allowable size, or assignable to a second size same as the predetermined maximum allowable size, wherein the spare area is assignable during a formatting process of the storage medium, or in-use status different than the formatting process of the storage medium, and the spare area is located at an outer radius of the storage medium.Type: ApplicationFiled: January 9, 2008Publication date: June 5, 2008Inventor: Yong Cheol Park
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Patent number: 7382699Abstract: An extracting circuit for extracting meta information from information forming contents is provided. The meta information extracted by the extracting circuit is recorded in a recording medium together with the contents and is used as management information. With this configuration, an object can be searched for based on the contents of the object in a recording device for recording contents, such as moving and still pictures, voices, graphics, and text, in a recording medium.Type: GrantFiled: November 10, 2004Date of Patent: June 3, 2008Assignee: Sony CorporationInventors: Miki Abe, Tadao Yoshida
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Patent number: 7379502Abstract: Disclosed is a method of digital data conversion. The method includes binding input digital data into unit blocks constituted by a plurality of bytes, modulation-coding each byte of the input data blocks by using a code conversion table, and allocating a merging bit in block unit for the modulation-coded input data in block unit.Type: GrantFiled: October 19, 2001Date of Patent: May 27, 2008Assignee: LG Electronics Inc.Inventors: Heui Gi Son, Bo Hyung Lee, Jae Jin Lee, Joo Hyun Lee
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Patent number: 7378994Abstract: An EFM/EFM+ encoder and a method thereof, performing digital sum value (DSV) protection in an Eight-to-Fourteen/Eight-to-Fourteen Plus (EFM/EFM+) encoding system to generate a data frame to be recorded on a recording medium. The method comprises modulating source data to the data frame having a predetermined number of channel bits, determining merging bits and DSV based on the channel bits, and changing the predetermined number of the channel bits in the data frame based on the DSV and the merging bits. The changing the predetermined number of the channel bits comprises inserting or removing a channel bit at the end of the data frame.Type: GrantFiled: January 8, 2007Date of Patent: May 27, 2008Assignee: Mediatek, Inc.Inventors: Wei-Hsiang Tseng, Shih-Ta Hung, Hsin-Cheng Chen
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Patent number: 7359303Abstract: An asynchronous transfer mode digital document delivery system is provided. A customer premise unit is configured to permit a customer to order and receive a data stream. A buffer is coupled to the customer premise unit to store the data stream before transmitting the data stream to a customer. A server includes digital documents stored thereon for delivery to customers through a switched ATM network. A control mechanism is employed to control a data rate of the data stream between the server and the buffer to ensure maintenance of a steady data stream from the customer premise unit to a customer during a loss of a physical layer between the server and the customer premise unit.Type: GrantFiled: November 14, 2003Date of Patent: April 15, 2008Assignee: Thomson LicensingInventors: Chandra Mohan, James Zhiming Zhang
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Patent number: 7355957Abstract: In order to stably carry out reproduction of information in an optical disc medium (10) using a PRML (partial-response maximum-likelihood) method for reproducing the signal, the optical disc medium (10) has not only a data recording area (14) where data is recorded at high density but also a system information recording area (16) where information is recorded at low density and binary equalizing/reproducing can be easily made. Information required to circuit setting is recorded in the system information recording area.Type: GrantFiled: April 12, 2004Date of Patent: April 8, 2008Assignees: NEC Corporation, Kabushiki Kaisha ToshibaInventors: Yutaka Yamanaka, Toshiaki Iwanaga, Tatsunori Ide, Chosaku Noda, Yutaka Kashihara, Akihito Ogawa, Masaaki Matsumaru
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Patent number: 7342864Abstract: There are provided a wobble signal reading unit configured to read a signal corresponding to a wobble formed at a predetermined track from an optical disk on which address information is recorded by applying phase modulation to the wobble formed at the track, an address information reproducing unit configured to reproduce the address information by applying phase detecting processing to the wobble signal read at the wobble signal reading unit, and binarizing an amplitude of an obtained phase detection signal by being compared with a predetermined threshold value, and a correcting unit configured to correct asymmetry of the amplitude generated in the phase detection signal obtained by the address information reproducing unit with respect to the predetermined threshold value at the time of reading the wobble signal from the predetermined track by the wobble signal reading unit.Type: GrantFiled: September 8, 2004Date of Patent: March 11, 2008Assignee: Kabushiki Kaisha ToshibaInventors: Yuji Nagai, Akihito Ogawa
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Patent number: 7339873Abstract: A data recording/reproducing apparatus for use with a disc recording medium having a plurality of either concentric or spiral tracks formed thereon, each of the tracks being divided into a plurality of sectors is provided. The apparatus includes a seeking element for seeking a target track; a data accessing element for accessing data on the target track reached by the seek; and an error correcting element for correcting error in the data based on an error correction code generated by the error correcting element for error correction purposes.Type: GrantFiled: July 2, 2004Date of Patent: March 4, 2008Assignee: Sony CorporationInventor: Toshiyuki Nakagawa
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Patent number: 7336572Abstract: A sync finder module for an optical medium playback device that generates a bit stream including sync patterns and data blocks comprises a pulse jitter detect module that receives the sync pattern, which includes a plurality of transitions each having a desired position in the sync pattern, that selects actual N-bit segments of the sync pattern at the desired positions and that compares the actual N-bit segments to at least one expected N-bit segment. A pulse verifying module communicates with the pulse jitter detect module and generates a verified signal if the expected N-bit segments match the actual N-bit segments.Type: GrantFiled: August 19, 2004Date of Patent: February 26, 2008Assignee: Marvell International Ltd.Inventor: Wooi Kean Lee
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Patent number: 7324423Abstract: The present invention is relative with a method for recording further data on a recording medium on which there re pre-recorded data obtained on modulating M-bit data to N-bit data, where M<N. The further recorded data are recorded by changing a certain bit or bits of the N-bit data, with the remaining portion of the bits of the N-bit data being fixed.Type: GrantFiled: October 25, 2002Date of Patent: January 29, 2008Assignee: Sony CorporationInventors: Yoichiro Sako, Akiya Saito, Yoshinobu Usui, Yoriaki Kanada, Tomihiro Nakagawa, Tatsuya Inokuchi, Shunsuke Furukawa, Takashi Kihara
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Patent number: 7317408Abstract: A digital modulation apparatus capable of generating a modulated code so that binary slice is correctly performed when reproducing is provided. To achieve this, in a digital modulation apparatus (10A), a DSV change amount calculator (15) calculates change amounts (?DSVa, ?DSVb) in DSVs of candidate modulated codes (CODEa, CODEb) generated by a modulated code generator (11). A modulated code determinator (13) compares the change amounts (?DSVa, ?DSVb), and determines that the candidate modulated code having a smaller absolute value should be selected as a modulated code (CODE). A modulated code selector (14) selects one of the candidate modulated codes (CODEa, CODEb) which is determined by the modulated code determinator (13), and outputs the selected code as a modulated code (CODE) for source data (DATA).Type: GrantFiled: March 18, 2004Date of Patent: January 8, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hiroyuki Yabuno, Hironori Deguchi
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Patent number: 7313083Abstract: In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation.Type: GrantFiled: May 2, 2005Date of Patent: December 25, 2007Assignee: Sony CorporationInventors: Michihiko Iida, Toshihiro Akimori, Nobutake Kagami
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Patent number: 7307937Abstract: This invention relates to a reproduced signal evaluation method of evaluating a reproduced signal reproduced from an information recording medium in which information composed of a plurality of codes differing in length is recorded and evaluates the reproduced signal on the basis of the reproduced signal of the next shortest code after the shortest code reproduced from the information recording medium.Type: GrantFiled: June 20, 2006Date of Patent: December 11, 2007Assignee: Kabushiki Kaisha ToshibaInventor: Akihito Ogawa
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Patent number: 7301877Abstract: This invention relates to a reproduced signal evaluation method of evaluating a reproduced signal reproduced from an information recording medium in which information composed of a plurality of codes differing in length is recorded and evaluates the reproduced signal on the basis of the reproduced signal of the next shortest code after the shortest code reproduced from the information recording medium.Type: GrantFiled: June 20, 2006Date of Patent: November 27, 2007Assignee: Kabushiki Kaisha ToshibaInventor: Akihito Ogawa
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Patent number: 7292523Abstract: In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately determine the physical characteristics of the disc, thereby making it possible to provide suitable setting for performing an operation.Type: GrantFiled: March 18, 2005Date of Patent: November 6, 2007Assignee: Sony CorporationInventors: Michihiko Iida, Toshihiro Akimori, Nobutake Kagami
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Patent number: 7289410Abstract: An ADIP demodulation method and apparatus, which are used in an optical disk driver to generate the ADIP information according to a wobble signal. The apparatus includes a slicing unit for receiving the wobble signal and generating a wobble pulse, a phase locked loop for generating a reference wobble signal with the same frequency and phase as the wobble pulse and a reference clock with frequency higher than the wobble pulse, a channel bit generator for generating a channel bit signal according to the reference wobble signal and the wobble pulse, and a decoder for decoding to ADIP information according to the channel bit signal. The channel bit generator generates a difference signal between the wobble pulse and the reference wobble signal, and outputs the channel bit signal according to the difference signal.Type: GrantFiled: July 22, 2003Date of Patent: October 30, 2007Assignee: Media Tek Inc.Inventors: Hao-Cheng Chen, Wen-Yi Wu
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Patent number: 7272087Abstract: An ADIP (address in pre-groove) signal detection circuit is capable of correctly and quickly detecting discontinuous points in a wobble signal, and has a simple configuration in a wobble detection system of an optical disc device such as a DVD+R/RW, and an ADIP signal detection method thereof. The ADIP signal detection circuit performing the ADIP signal detection method includes one or two window comparators, two edge detection circuits each consisting of an exclusive OR circuit and an AND circuit, and two discontinuous point determination circuits each consisting of a flip-flop and a counter. Therefore, the ADIP signal detection circuit has a simple configuration so that it can be easily implemented. Also, since the ADIP signal detection circuit has a fast operation speed, the ADIP signal detection circuit detects discontinuous points correctly and quickly.Type: GrantFiled: April 27, 2004Date of Patent: September 18, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Soo-yong Kim, Young-hoon Lee, Seok-min Yun
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Patent number: 7272097Abstract: A method of detecting a data structure of fourteen-bit data in an optical storage device includes connecting a first 8-bit register between an eight-to-fourteen modulator and a leading zero counter, storing 8 least significant bits of the data output from the eight-to-fourteen modulator into the first 8-bit register, and calculating the number of leading zeros with the leading zero counter.Type: GrantFiled: December 16, 2003Date of Patent: September 18, 2007Assignee: Mediatek IncorporationInventor: Tsung-Huei Ren
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Patent number: 7251207Abstract: A multi-level data processing method converts a binary data into a multi-level data having n bits per symbol, where n is an integer satisfying n?2. A {(n?1)×m}-bit binary data is arranged in upper (n?1) bits of multi-level data of m symbols, where m is an integer satisfying m?2, and a (m?k)-bit binary data is converted into m bits according to a predetermined conversion rule and arranged in a lower 1 bit of the multi-level data of m symbols, where k is an integer satisfying m>k?1, so as to convert a (n×m?k)-bit binary data into 1 set of multi-level data made up of m symbols.Type: GrantFiled: October 21, 2003Date of Patent: July 31, 2007Assignee: Ricoh Company, Ltd.Inventors: Koubun Sakagami, Akihiko Shimizu
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Patent number: 7239592Abstract: For indicating on a data medium (9) a sector referenced by a binary word (16) formed of a number M of first bytes each comprising a number L of bits, the method includes steps of etching onto the data medium locally at this sector a succession of M second bytes each corresponding to a first byte, each second byte being equal to a vector of N components, each with a value of +1 or ?1, such that N=2L?1 and such that the scalar product of said vector with any other vector to which another second byte is equal, is at most equal to +1. The data medium (9) is, for example, an optical disk.Type: GrantFiled: December 5, 2003Date of Patent: July 3, 2007Assignee: STMicroelectronics S.A.Inventor: Philippe Graffouliere
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Patent number: 7212483Abstract: When a code word sequence is generated by converting input data words of p bits into code words of q bits and concatenating adjacent ones of the code words with a merge bit sequence of r bits in order to obtain the best DSV value, according to one aspect, the adjacent code words are concatenated with the merge bit sequence of r bits which is selected, free from the restriction of the minimum run-length of (d+1)T and the maximum run-length of (k+1)T based on the run-length limiting rule RLL(d, k) but permitting the minimum run-length of (d+1)T and the maximum run-length of (k+2)T.Type: GrantFiled: September 24, 2003Date of Patent: May 1, 2007Assignee: Victor Company of Japan, LimitedInventors: Harukuni Kobari, Toshio Kuroiwa, Hirotoshi Ohno, Hiroyoshi Yoshikawa, Nobuchika Ochi, Junzo Suzuki
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Patent number: 7209422Abstract: An optical disc recording method is provided for superimposing sub information by displacing edges of one or more optically-readable recording marks by a minute amount on the basis of a binary sequence code, when recording main information by forming said one or more recording marks, the optical disc recording method including a sequence generation step of generating a first binary sequence code and a second binary sequence code that is different from the first binary sequence code; a first displacement step of displacing one of the edges according to the first binary sequence code; and a second displacement step of displacing another of the edges according to the second binary sequence code.Type: GrantFiled: October 25, 2002Date of Patent: April 24, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takahiro Sato, Takashi Yumiba, Takahiro Nagai
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Patent number: 7200093Abstract: An apparatus for generating a wobble clock includes an operation circuit for receiving a wobble signal and counting cycles of an oscillating signal during a cycle of the wobble signal to derive a cycle value and for comparing the cycle value with a preset cycle value to output a first protection signal, and a phase-locked loop circuit connected to the operation circuit for receiving the wobble signal, the wobble clock and the first protection signal, and determining whether the wobble clock is to be synchronized with the wobble signal according to the first protection signal.Type: GrantFiled: April 7, 2004Date of Patent: April 3, 2007Assignee: Via Optical Solution, Inc.Inventors: Yuan-Kun Hsiao, Luke Wen
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Patent number: 7200096Abstract: A method and apparatus for modulating multilevel data arrays to make them suitable for storage in multidimensional storage media, such as in holographic storage. In order to get a uniform signal of constant energy at the recording plane, first the multilevel data array, Vout, displayed on a spatial light modulator, has frequent transitions between symbols of different levels, and second it has constant energy. The energy is defined as the summation of the values of the symbols in the data array. The first constraint is achieved using V?in=Vin?qM(q, ZO), where ?q stands for the modulo-q addition operation; M(q, Zo) is a data array with randomly distributed symbols of q levels, where q is the number of levels and ZO is the seed used to generate the random multilevel data array.Type: GrantFiled: August 17, 2001Date of Patent: April 3, 2007Assignee: Data Storage InstituteInventors: Cheng Chiang Phua, JingFeng Liu, Tow Chong Chong, Yi Hong Wu, Jun Li
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Patent number: 7196998Abstract: A method of identifying ADIP information through counting identical bits and different bits includes generating a wobble clock according to a wobble signal, generating a calculation result according to the wobble signal and the wobble clock, sampling the calculation result to generate a sampling signal and comparing each bit of the sampling signal with each bit of a bit stream containing an ADIP data, counting different bits corresponding to a predetermined logic value for generating a first bit count, and counting identical bits for generating a second bit count, and determining whether the calculation result corresponds to the ADIP data according to the first bit count and the second bit count.Type: GrantFiled: April 7, 2004Date of Patent: March 27, 2007Assignee: VIA Optical Solution, Inc.Inventor: Yuan-Kun Hsiao
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Patent number: 7196994Abstract: An optical disk is provided that disables reproduction of sub-information even if the sub-information as a contents encryption key is recorded entirely onto another optical disk. Sub-information is recorded on the optical disk by deforming a recording mark slightly in accordance with a pseudo random number sequence that is obtained using as an initial value medium ID that is read out medium inherent information. This allows sub-information inherent in a medium to be recorded, and even if the sub-information is duplicated entirely to another optical disk, the illegally duplicated sub-information cannot be reproduced because of a difference in initial value of a pseudo random number sequence between media.Type: GrantFiled: June 2, 2003Date of Patent: March 27, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masaru Yamaoka, Takashi Yumiba, Takahiro Nagai, Hideshi Ishihara
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Patent number: 7167431Abstract: It is an object of the present invention to provide an information recording method for recording information in a data rewritable type optical recording medium having a plurality of information recording layers, which can form recording marks having good shapes.Type: GrantFiled: February 14, 2003Date of Patent: January 23, 2007Assignee: TDK CorporationInventors: Hideaki Miura, Tatsuya Kato