Data processing apparatus, data recording device, data reproducing device and method for writing data on recording medium with multiple recording layers

A technology for data processing devices and recording media, applied in optical recording/reproduction/erasing methods, data recording, digital recording/reproduction, etc., capable of solving problems such as inapplicability and inclusion layer boundaries that cannot be recorded, and achieving reliable addressing Effect

Inactive Publication Date: 2008-03-26
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the DVD-Video format, there is a restriction that the unit (cell) that is the smallest connection unit of video data cannot be recorded because it includes the boundary of the layer.
Therefore, this countermeasure does not apply

Method used

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  • Data processing apparatus, data recording device, data reproducing device and method for writing data on recording medium with multiple recording layers
  • Data processing apparatus, data recording device, data reproducing device and method for writing data on recording medium with multiple recording layers
  • Data processing apparatus, data recording device, data reproducing device and method for writing data on recording medium with multiple recording layers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0053] 1( a ), ( b1 ), ( b2 ) and ( c ) show an outline of a data size adjustment method for image data for writing image data on the two-layer optical disc 19 . FIG. 1(c) schematically shows a cross-section of a two-layer optical disc 19. As shown in FIG. The double-layer optical disk 19 may be a double-layer DVD-R disk, or may be a recordable optical disk having multiple layers, such as a double-layer DVD-RW disk. 1( a ) and ( b2 ) respectively show image data 21 and image data 26 prepared assuming writing in the L0 layer and the L1 layer. FIG. 1( b1 ) shows image data processed by the processing of this embodiment.

[0054] As shown in FIG. 1( c ), a lead-in area 11 , a data-recordable area 12 , and an intermediate area 13 are formed from the beginning in the L0 layer. The physical address of the head sector of the recordable data area 12 of the L0 layer is represented by S, and the physical address of the last sector is represented by X. The middle area 13 is preformed....

Embodiment approach 2

[0158] In Embodiment 1, a case where the data size of the CMF data for the L0 layer is adjusted is described as an example. Assume that the CMF data is encrypted by CPRM.

[0159] In this embodiment, a data recording method when CMF data is encrypted by an encryption method different from the CPRM method will be described.

[0160]In addition to the CPRM method, encryption methods suitable for recordable discs include AACS (advanced access content system) and CSS (copy scrambling system). Next, in addition to the processing of the first embodiment, the processing when data is encrypted by the CSS method will be described. When the CSS method is adopted, encryption is performed using information unique to each disc to be recorded.

[0161] As information unique to each disc, identification information (disc key) of the medium recorded in the lead-in area can be used.

[0162] Also, no disc key is set in the existing DVD-R. Therefore, when using a DVD-R, a new type of disc i...

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Abstract

A data processing apparatus according to the present invention generates data to be written continuously on first and second recording layers of a recording medium. The first and second recording layers have first and second storage capacities, respectively. The data processing apparatus includes: a data storage in which the data to be written is split into, and stored separately as, first and second data, the first data having a data size that is smaller than the first storage capacity, the second data having a data size that is smaller than the second storage capacity; a communication section for getting the end address of a data recordable area of the first recording layer; a controller for adjusting the data size of the first data such that the beginning of the first data is written at the start address of the data recordable area of the first recording layer and that the end of the first data is written at the end address gotten; and an output section for outputting the first data, the data size of which size has been adjusted, and the second data.

Description

technical field [0001] The present invention relates to a data processing device for image data used for a download service of video contents to a dual-layer disc (disc), and a recording device for the image data. Background technique [0002] When creating a commercially available DVD-Video disc for reproduction (hereinafter referred to as a DVD-Video disc), data conforming to CMF (Cutting Master Format: master disc recording format) is prepared in advance, and a source disc is created based on the data. Then, create a DVD-Video disc using the source disc. When creating a DVD-Video disc (with a recording capacity of 8.54 Gb (109 bytes)) having two recording layers, data conforming to CMF is prepared for each layer. [0003] FIG. 12 shows the data structure of CMF-compliant data (hereinafter referred to as "CMF data"). Non-Patent Document 1 defines this data structure. [0004] The CMF data is divided into four files 101 to 104 and constituted. DDVID.DAT101 stores the id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B7/004
CPCG11B2020/1227G11B20/00449G11B2020/1288G11B2220/2562G11B2020/1292G11B2220/235G11B27/034G11B20/00442G11B2220/237G11B20/00268
Inventor 后藤芳稔滨坂浩史
Owner PANASONIC CORP
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