Sony Corporation

Shigeharu Sato

Takahiro Ichikawa

Kazuhiro Yasuda

Satoru Kimura

Kenji Ogawa

Yoshinori Shimizu

Takayuki Ishida

Susumu Senshu

Shozo Masuda

Tadashi Nakata

Information recording and playback apparatus, content management method, and content management program. When data of copyright-protected content is recorded in a general-purpose HDD, illegal copying of the content is prevented. Each time when content is recorded in the HDD and when content recorded in the HDD is moved to a Blu-ray disc (BD), a random number output section outputs unique verification information (a random number) and overwrites the unique verification information in the corresponding verification files of the HDD and an EEPROM. Then, when the content recorded in the HDD is to be moved to the BD, a verification section verifies the verification information (random number) recorded in the verification file of the HDD against the verification information (the random number) recorded in the verification file of the EEPROM, and permits the movement of the associated content only when they match.

Information recording and playback apparatus, content management method, and content management program capable of preventing illegal copying of content

A data reproduction apparatus and a data reproduction method can alleviate the workload of a special processing operation of fast forward or reverse data reproduction and improve the data access speed for fast reproduction of data. The data reproduction apparatus comprises an optical pickupfor reproducing data from an optical disk, a sector detectorfor detecting a first piece of data information indicating if a data is to be output as signal or not, a ring buffer memoryfor storing data, an error correction circuitfor correcting errors in the data to be output as signal as indicated by the first piece of data information out of the stored data, a stream detectorfor detecting a second piece of data information indicating the data to be out as signal out of the data corrected for errors, decodersfor decoding the data corrected for errors and stored in the ring buffer memoryas signal to be reproduced and a system controllerfor control the data to be decoded and the data not to be decoded by referring to the first piece of data information and the second piece of data information detected by a second data information detection means.

Data reproduction apparatus and reproduction method

A data decoding apparatus and the method and a data reproduction apparatus which reduces capacity of a memory used for decoding and speedily accesses to data to be read. In a data decoding apparatus ( ) and the method which decodes coded data (S ) which is recorded in a recording medium ( ), the coded data (S ) read from the recording medium ( ) is stored in a memory used for decoding ( ), data information of data to be read is detected from decoded data which is generated in the middle of decoding the coded data (S ), the data information is stored in a data information storage means and the output of decoded data (S ) is controlled on the based on the data information, thereby the output of the decoded data (S ) is controlled based on the data information independent of decoding of the coded data (S ).

Data decoding apparatus and method and data reproduction apparatus

A data decoding apparatus and the method and a data reproduction apparatus which reduces capacity of a memory used for decoding and speedily accesses to data to be read. In a data decoding apparatus (50) and the method which decodes coded data (S2) which is recorded in a recording medium (2), the coded data (S2) read from the recording medium (2) is stored in a memory used for decoding (51), data information of data to be read is detected from decoded data which is generated in the middle of decoding the coded data (S2), the data information is stored in a data information storage means and the output of decoded data (S10) is controlled on the based on the data information, thereby the output of the decoded data (S10) is controlled based on the data information independent of decoding of the coded data (S2).

Decoding apparatus and method set interpolation flags in units smaller than an ECC block. The PI1 flag indicating an error on a row-by-row basis is generated for the first error correction result, while the PI2 flag also indicating an error on a row-by-row basis is generated for the second error correction result in the ECC block. The PO flag indicating an error on a column-by-column basis is further generated for the error correction result in the ECC block. Following these processing operations, the PI1, PI2 and PO flags are used for generating the interpolation flags.

Apparatus and method for decoding data using flags to indicate decoding

Error correction decoding apparatus decodes error correction encoded data reproduced from a recording medium by decoding the encoded data to produce decoded data in frame units and by generating decoding information in frame units; the decoded data and decoding information are stored in correspondence by frame unit and the decoded data and decoding information are retrieved from storage while frame synchronizing with address data representing a physical location of the encoded data on the recording medium.

Growing community of inventors

Chiba, Japan

Shigeharu Sato